FE / FirstEnergy Corp. - SEC-Einreichungen, Jahresbericht, Proxy Statement

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 1, 2026 Commission Registra

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 1, 2026 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An Ohi

Focused on Our Future Spring Investor Update Published June 1, 2026 Forward-Looking Statements This presentation includes forward-looking statements based on information currently available to management and unless the context requires otherwise, ref

ex991springinvestorupdat Focused on Our Future Spring Investor Update Published June 1, 2026 Forward-Looking Statements This presentation includes forward-looking statements based on information currently available to management and unless the context requires otherwise, references to “we,” “us,” “our” and “FirstEnergy” refers to FirstEnergy Corp.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE

EX-25 Exhibit 25 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE ☐ CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTEE PURSUANT TO SECTION 305(b)(2) THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A. (Exact name of trustee as specified in its charter)

May 29, 2026

EX-5.(b) Exhibit 5(b) May 29, 2026 FirstEnergy Corp. 341 White Pond Drive Akron, Ohio 44320 RE: FirstEnergy Corp.   Registration Statement on Form S-3   Filed on May 29, 2026 Ladies and Gentlemen: We have acted as counsel to FirstEnergy Corp., an Ohio corporation (the “Company”), in connection with its filing of a Registration Statement on Form S-3 (the “Registration Statement”) under the Securiti

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

EX-23.(a) Exhibit 23(a) CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We hereby consent to the incorporation by reference in this Registration Statement on Form S-3 of FirstEnergy Corp. of our report dated February 18, 2026 relating to the financial statements and the effectiveness of internal control over financial reporting, which appears in FirstEnergy Corp.’s Annual Report on Form 1

Security Type

Calculation of Filing Fee Tables S-3 FIRSTENERGY CORP Table 1: Newly Registered and Carry Forward Securities ☐Not Applicable Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial Effective Date Filing Fee Previously Paid in Connection with Unsold Securities to be Carried Forward Newly Registered Securities Debt Debt Securities 457(o) Equity Common Stock, par value $0.

341 White Pond Drive

EX-5.(a) Exhibit 5(a) 341 White Pond Drive Akron, OH 44320 James A. Arcuri, Esq. 330-384-5400 Vice President, Associate General Counsel of FirstEnergy Service Company, an affiliate of FirstEnergy Corp. May 29, 2026 FirstEnergy Corp. 341 White Pond Drive Akron, Ohio 44320 Ladies and Gentlemen: I am Vice President, Associate General Counsel of FirstEnergy Service Company, an affiliate of FirstEnergy

As filed with the Securities and Exchange Commission on May 29, 2026

S-3 Table of Contents As filed with the Securities and Exchange Commission on May 29, 2026 Registration No.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 20, 2026 Commission Registra

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 20, 2026 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An Ohi

Exhibit 10.1 Execution Version CONFIDENTIAL FIFTH AMENDED AND RESTATED LIMITED LIABILITY COMPANY AGREEMENT OF FIRSTENERGY TRANSMISSION, LLC i TABLE OF CONTENTS Page ARTICLE I GENERAL MATTERS ...........................................................

ex101-fe5x20x2026 Exhibit 10.1 Execution Version CONFIDENTIAL FIFTH AMENDED AND RESTATED LIMITED LIABILITY COMPANY AGREEMENT OF FIRSTENERGY TRANSMISSION, LLC i TABLE OF CONTENTS Page ARTICLE I GENERAL MATTERS ........................................................................................... 2 Section 1.1 Formation ...........................................................................

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 28, 2026 Commission Regist

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 28, 2026 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An O

Focused on Our Future 1Q 2026 Strategic & Financial Highlights Published April 28, 2026 Forward-Looking Statements This presentation includes forward-looking statements based on information currently available to management and unless the context req

ex9921q26strategicandfin Focused on Our Future 1Q 2026 Strategic & Financial Highlights Published April 28, 2026 Forward-Looking Statements This presentation includes forward-looking statements based on information currently available to management and unless the context requires otherwise, references to “we,” “us,” “our” and “FirstEnergy” refers to FirstEnergy Corp.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2026 ☐ TRANSITION REPORT P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2026 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission Registrants; I.R.S. Employer Fil

FirstEnergy Announces First Quarter 2026 Financial Results, Reaffirms Guidance and Capital Plan to Deliver Value to Customers, Communities and Investors Reports first quarter 2026 GAAP earnings of $0.70 per share and Core Earnings (non-GAAP) of $0.72

Exhibit 99.1 FirstEnergy Corp. For Release: April 28, 2026 341 White Pond Drive Akron, Ohio 44320 www.firstenergycorp.com News Media Contact: Investor Contact: Tricia Ingraham Karen Sagot (330) 384-5247 (330) 761-4286 FirstEnergy Announces First Quarter 2026 Financial Results, Reaffirms Guidance and Capital Plan to Deliver Value to Customers, Communities and Investors Reports first quarter 2026 GA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2026 ☐ TRANSITION REPORT P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2026 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission Registrants; I.R.S. Employer Fil

U.S. $750,000,000 CREDIT AGREEMENT dated as of April 28, 2026, by and among FIRSTENERGY CORP., as Borrower, THE BANKS NAMED HEREIN, as Banks, JPMORGAN CHASE BANK, N.A., as Administrative Agent, JPMORGAN CHASE BANK, N.A. PNC CAPITAL MARKETS LLC, as Jo

Exhibit 10.1 EXECUTION VERSION U.S. $750,000,000 CREDIT AGREEMENT dated as of April 28, 2026, by and among FIRSTENERGY CORP., as Borrower, THE BANKS NAMED HEREIN, as Banks, JPMORGAN CHASE BANK, N.A., as Administrative Agent, JPMORGAN CHASE BANK, N.A. PNC CAPITAL MARKETS LLC, as Joint Lead Arrangers and Joint Bookrunners PNC CAPITAL MARKETS LLC, as Syndication Agent BARCLAYS BANK PLC, BANK OF AMERI

U.S. $750,000,000 CREDIT AGREEMENT dated as of April 28, 2026, by and among FIRSTENERGY CORP., as Borrower, THE BANKS NAMED HEREIN, as Banks, JPMORGAN CHASE BANK, N.A., as Administrative Agent, JPMORGAN CHASE BANK, N.A. PNC CAPITAL MARKETS LLC, as Jo

Exhibit 10.1 EXECUTION VERSION U.S. $750,000,000 CREDIT AGREEMENT dated as of April 28, 2026, by and among FIRSTENERGY CORP., as Borrower, THE BANKS NAMED HEREIN, as Banks, JPMORGAN CHASE BANK, N.A., as Administrative Agent, JPMORGAN CHASE BANK, N.A. PNC CAPITAL MARKETS LLC, as Joint Lead Arrangers and Joint Bookrunners PNC CAPITAL MARKETS LLC, as Syndication Agent BARCLAYS BANK PLC, BANK OF AMERI

ARS

202 Annual Report FirstEnergy Board of Directors Heidi L. Boyd Senior 0 anaging ' irector RI %ODFNVWRQH ,QIUDVWUXFWXUH*URXS Director of FirstEnergy since 2024 Jana T. Croom Chief ) inancial 2 fficer of Kimball Electronics, Inc. Director of FirstEnergy since 2022 Steven J. Demetriou ([HFXWLYHFKDLURI$PHQWXP+ROGLQJV,QF Director of FirstEnergy since 2017 Lisa Winston Hicks Retired as % oard

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

Notice of Annual Meeting of Shareholders Table of Contents Proxy Statement Summary Corporate Governance and Board of Directors Information Biographical Information and Qualifications of Nominees for Election as Directors Board Committees Items to Be

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Defin

FIRSTENERGY CORP. LIST OF SUBSIDIARIES OF THE REGISTRANT As of December 31, 2025 FirstEnergy Service Company - Incorporated in Ohio FirstEnergy Pennsylvania Holding Company - Incorporated in Pennsylvania FirstEnergy Transmission, LLC - Organized in D

EXHIBIT 21 FIRSTENERGY CORP. LIST OF SUBSIDIARIES OF THE REGISTRANT As of December 31, 2025 FirstEnergy Service Company - Incorporated in Ohio FirstEnergy Pennsylvania Holding Company - Incorporated in Pennsylvania FirstEnergy Transmission, LLC - Organized in Delaware FirstEnergy Ventures Corp. - Incorporated in Ohio Jersey Central Power & Light Company - Incorporated in New Jersey Monongahela Pow

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☑ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the FISCAL YEAR ended December 31, 2025 ☐ TRANSITION REPORT PURSUA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☑ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the FISCAL YEAR ended December 31, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission Registrants; I.R.S. Employer File Num

FIRSTENERGY CORP. LIST OF SUBSIDIARIES OF THE REGISTRANT As of December 31, 2025 FirstEnergy Service Company - Incorporated in Ohio FirstEnergy Pennsylvania Holding Company - Incorporated in Pennsylvania FirstEnergy Transmission, LLC - Organized in D

EXHIBIT 21 FIRSTENERGY CORP. LIST OF SUBSIDIARIES OF THE REGISTRANT As of December 31, 2025 FirstEnergy Service Company - Incorporated in Ohio FirstEnergy Pennsylvania Holding Company - Incorporated in Pennsylvania FirstEnergy Transmission, LLC - Organized in Delaware FirstEnergy Ventures Corp. - Incorporated in Ohio Jersey Central Power & Light Company - Incorporated in New Jersey Monongahela Pow

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☑ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the FISCAL YEAR ended December 31, 2025 ☐ TRANSITION REPORT PURSUA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☑ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the FISCAL YEAR ended December 31, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission Registrants; I.R.S. Employer File Num

Focused on Our Future Annual Investor FactBook Published February 17, 2026 Table of Contents Investor FactBook - Published Feb. 17, 20262 6 Stand-Alone Transmission Segment 36 - 43 4 Distribution Segment 25 - 29 5 Integrated Segment 30 - 35 7 Additio

ex9934q25investorfactboo Focused on Our Future Annual Investor FactBook Published February 17, 2026 Table of Contents Investor FactBook - Published Feb.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 17, 2026 Commission Reg

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 17, 2026 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (A

FirstEnergy Announces 2025 Financial Results, Affirms 2026 Guidance and Provides Long-Term Financial Outlook Focused on Delivering Value to Customers, Communities and Investors Reports 2025 GAAP earnings of $1.77 per share and Core Earnings (non-GAAP

Exhibit 99.1 FirstEnergy Corp. For Release: February 17, 2026 341 White Pond Drive Akron, Ohio 44320 www.firstenergycorp.com News Media Contact: Investor Contact: Tricia Ingraham Karen Sagot (330) 384-5247 (330) 761-4286 FirstEnergy Announces 2025 Financial Results, Affirms 2026 Guidance and Provides Long-Term Financial Outlook Focused on Delivering Value to Customers, Communities and Investors Re

Focused on Our Future 4Q 2025 Strategic & Financial Highlights Published February 17, 2026 Forward-Looking Statements Forward-Looking Statements: This presentation includes forward-looking statements based on information currently available to manage

ex9924q25strategicfinanc Focused on Our Future 4Q 2025 Strategic & Financial Highlights Published February 17, 2026 Forward-Looking Statements Forward-Looking Statements: This presentation includes forward-looking statements based on information currently available to management and unless the context requires otherwise, references to “we,” “us,” “our” and “FirstEnergy” refers to FirstEnergy Corp.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 8, 2026 Commission Regi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 8, 2026 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An

2026 Financial Guidance Published December 9, 2025 Forward-Looking Statements Forward-Looking Statements: This presentation includes forward-looking statements based on information currently available to management and unless the context requires oth

a2026financialguidancepr 2026 Financial Guidance Published December 9, 2025 Forward-Looking Statements Forward-Looking Statements: This presentation includes forward-looking statements based on information currently available to management and unless the context requires otherwise, references to “we,” “us,” “our” and “FirstEnergy” refers to FirstEnergy Corp.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 9, 2025 Commission Regi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 9, 2025 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An

TO THE INVESTMENT COMMUNITY:

Exhibit 99.1 Karen Sagot Vice President Investor Relations FirstEnergy Corp. 341 White Pond Dr. Akron, Ohio 44320 Tel 330-761-4286 December 9, 2025 TO THE INVESTMENT COMMUNITY:1 On December 9, 2025, FirstEnergy Corp. (“FirstEnergy” or the “Company”) issued a presentation providing its 2026 financial outlook which is focused on delivering value to our customers, the communities we serve and our inv

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 20, 2025 Commission Reg

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 20, 2025 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (A

Karen Sagot

Exhibit 99.1 Karen Sagot Vice President Investor Relations FirstEnergy Corp. 341 White Pond Dr. Akron, Ohio 44320 Tel 330-761-4286 November 20, 2025 TO THE INVESTMENT COMMUNITY:1 On November 19, 2025, FirstEnergy Corp. (FE) electric companies, The Cleveland Electric Illuminating Company, the Ohio Edison Company and The Toledo Edison (collectively, the Ohio Companies) received an order from the Pub

AMENDMENT NO. 4 TO CREDIT AGREEMENT dated as of October 27, 2025 MONONGAHELA POWER COMPANY, THE POTOMAC EDISON COMPANY, as Borrowers, THE LENDERS NAMED HEREIN, as Lenders, MIZUHO BANK, LTD., as Administrative Agent, THE FRONTING BANKS NAMED HEREIN, a

Exhibit 10.9 AMENDMENT NO. 4 TO CREDIT AGREEMENT dated as of October 27, 2025 among MONONGAHELA POWER COMPANY, and THE POTOMAC EDISON COMPANY, as Borrowers, THE LENDERS NAMED HEREIN, as Lenders, MIZUHO BANK, LTD., as Administrative Agent, and THE FRONTING BANKS NAMED HEREIN, as Fronting Banks JPMORGAN CHASE BANK, N.A. PNC CAPITAL MARKETS LLC MUFG BANK, LTD. BofA SECURITIES, INC. WELLS FARGO SECURI

AMENDMENT NO. 2 TO CREDIT AGREEMENT dated as of October 27, 2025 KEYSTONE APPALACHIAN TRANSMISSION CO., as Borrower, THE LENDERS NAMED HEREIN, as Lenders, PNC BANK, NATIONAL ASSOCIATION, as Administrative Agent, THE FRONTING BANKS NAMED HEREIN, as Fr

Exhibit 10.10 AMENDMENT NO. 2 TO CREDIT AGREEMENT dated as of October 27, 2025 among KEYSTONE APPALACHIAN TRANSMISSION CO., as Borrower, THE LENDERS NAMED HEREIN, as Lenders, PNC BANK, NATIONAL ASSOCIATION, as Administrative Agent, and THE FRONTING BANKS NAMED HEREIN, as Fronting Banks JPMORGAN CHASE BANK, N.A. PNC CAPITAL MARKETS LLC MUFG BANK, LTD. BARCLAYS BANK PLC BofA SECURITIES, INC. WELLS F

AMENDMENT NO. 4 TO CREDIT AGREEMENT dated as of October 27, 2025 JERSEY CENTRAL POWER & LIGHT COMPANY, as Borrower, THE LENDERS NAMED HEREIN, as Lenders, MIZUHO BANK, LTD., as Administrative Agent, THE FRONTING BANKS NAMED HEREIN, as Fronting Banks

Exhibit 10.6 AMENDMENT NO. 4 TO CREDIT AGREEMENT dated as of October 27, 2025 among JERSEY CENTRAL POWER & LIGHT COMPANY, as Borrower, THE LENDERS NAMED HEREIN, as Lenders, MIZUHO BANK, LTD., as Administrative Agent, and THE FRONTING BANKS NAMED HEREIN, as Fronting Banks JPMORGAN CHASE BANK, N.A. PNC CAPITAL MARKETS LLC MUFG BANK, LTD. BARCLAYS BANK PLC BofA SECURITIES, INC. MIZUHO BANK, LTD. CITI

AMENDMENT NO. 4 TO CREDIT AGREEMENT dated as of October 27, 2025 FIRSTENERGY PENNSYLVANIA ELECTRIC COMPANY, as Borrower, THE LENDERS NAMED HEREIN, as Lenders, MIZUHO BANK, LTD. as Administrative Agent, THE FRONTING BANKS NAMED HEREIN, as Fronting Ban

Exhibit 10.8 AMENDMENT NO. 4 TO CREDIT AGREEMENT dated as of October 27, 2025 among FIRSTENERGY PENNSYLVANIA ELECTRIC COMPANY, as Borrower, THE LENDERS NAMED HEREIN, as Lenders, MIZUHO BANK, LTD. as Administrative Agent, and THE FRONTING BANKS NAMED HEREIN, as Fronting Banks JPMORGAN CHASE BANK, N.A. PNC CAPITAL MARKETS LLC MUFG BANK, LTD. BARCLAYS BANK PLC BofA SECURITIES, INC. MIZUHO BANK, LTD.

AMENDMENT NO. 4 TO CREDIT AGREEMENT dated as of October 27, 2025 AMERICAN TRANSMISSION SYSTEMS, INCORPORATED, MID-ATLANTIC INTERSTATE TRANSMISSION, LLC, TRANS-ALLEGHENY INTERSTATE LINE COMPANY, as Borrowers, THE LENDERS NAMED HEREIN, as Lenders, PNC

Exhibit 10.12 AMENDMENT NO. 4 TO CREDIT AGREEMENT dated as of October 27, 2025 among AMERICAN TRANSMISSION SYSTEMS, INCORPORATED, MID-ATLANTIC INTERSTATE TRANSMISSION, LLC, and TRANS-ALLEGHENY INTERSTATE LINE COMPANY, as Borrowers, THE LENDERS NAMED HEREIN, as Lenders, PNC BANK, NATIONAL ASSOCIATION, as Administrative Agent, and THE FRONTING BANKS NAMED HEREIN, as Fronting Banks JPMORGAN CHASE BAN

AMENDMENT NO. 2 TO CREDIT AGREEMENT dated as of October 27, 2025 FIRSTENERGY TRANSMISSION, LLC, as Borrower, THE LENDERS NAMED HEREIN, as Lenders, JPMORGAN CHASE BANK, N.A., as Administrative Agent, THE FRONTING BANKS NAMED HEREIN, as Fronting Banks

Exhibit 10.11 AMENDMENT NO. 2 TO CREDIT AGREEMENT dated as of October 27, 2025 among FIRSTENERGY TRANSMISSION, LLC, as Borrower, THE LENDERS NAMED HEREIN, as Lenders, JPMORGAN CHASE BANK, N.A., as Administrative Agent, and THE FRONTING BANKS NAMED HEREIN, as Fronting Banks JPMORGAN CHASE BANK, N.A. PNC CAPITAL MARKETS LLC BARCLAYS BANK PLC BofA SECURITIES, INC. WELLS FARGO SECURITIES, LLC MIZUHO B

AMENDMENT NO. 4 TO CREDIT AGREEMENT dated as of October 27, 2025 FIRSTENERGY CORP., as Borrower, THE LENDERS NAMED HEREIN, as Lenders, JPMORGAN CHASE BANK, N.A., as Administrative Agent, THE FRONTING BANKS NAMED HEREIN, as Fronting Banks

Exhibit 10.5 AMENDMENT NO. 4 TO CREDIT AGREEMENT dated as of October 27, 2025 among FIRSTENERGY CORP., as Borrower, THE LENDERS NAMED HEREIN, as Lenders, JPMORGAN CHASE BANK, N.A., as Administrative Agent, and THE FRONTING BANKS NAMED HEREIN, as Fronting Banks JPMORGAN CHASE BANK, N.A. PNC CAPITAL MARKETS LLC MUFG BANK, LTD. BARCLAYS BANK PLC BofA SECURITIES, INC. MIZUHO BANK, LTD. CITIBANK, N.A.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2025 ☐ TRANSITION REPO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission Registrants; I.R.S. Employer

AMENDMENT NO. 4 TO CREDIT AGREEMENT dated as of October 27, 2025 THE CLEVELAND ELECTRIC ILLUMINATING COMPANY, OHIO EDISON COMPANY, THE TOLEDO EDISON COMPANY, as Borrowers, THE LENDERS NAMED HEREIN, as Lenders, JPMORGAN CHASE BANK, N.A., as Administra

Exhibit 10.7 AMENDMENT NO. 4 TO CREDIT AGREEMENT dated as of October 27, 2025 among THE CLEVELAND ELECTRIC ILLUMINATING COMPANY, OHIO EDISON COMPANY, and THE TOLEDO EDISON COMPANY, as Borrowers, THE LENDERS NAMED HEREIN, as Lenders, JPMORGAN CHASE BANK, N.A., as Administrative Agent, and THE FRONTING BANKS NAMED HEREIN, as Fronting Banks JPMORGAN CHASE BANK, N.A. PNC CAPITAL MARKETS LLC MUFG BANK,

Focused on Our Future 3Q 2025 Strategic & Financial Highlights Published October 22, 2025 Forward-Looking Statements Forward-Looking Statements: This presentation includes forward-looking statements based on information currently available to managem

ex9923q25highlightsvfin Focused on Our Future 3Q 2025 Strategic & Financial Highlights Published October 22, 2025 Forward-Looking Statements Forward-Looking Statements: This presentation includes forward-looking statements based on information currently available to management and unless the context requires otherwise, references to “we,” “us,” “our” and “FirstEnergy” refers to FirstEnergy Corp.

FirstEnergy Announces Third Quarter 2025 Financial Results Reports GAAP earnings of $0.76 per share for the third quarter, $1.85 per share year to date Delivers Core Earnings (non-GAAP) of $0.83 per share for the third quarter and $2.02 per share yea

Exhibit 99.1 FirstEnergy Corp. For Release: October 22, 2025 341 White Pond Drive Akron, Ohio 44320 www.firstenergycorp.com News Media Contact: Investor Contact: Tricia Ingraham Karen Sagot (330) 384-5247 (330) 761-4286 FirstEnergy Announces Third Quarter 2025 Financial Results Reports GAAP earnings of $0.76 per share for the third quarter, $1.85 per share year to date Delivers Core Earnings (non-

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 22, 2025 Commission Regi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 22, 2025 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An

FIRSTENERGY CORP. EXECUTIVE SEVERANCE BENEFITS PLAN As Amended and Restated as of January 1, 2026

Exhibit 10.1 FIRSTENERGY CORP. EXECUTIVE SEVERANCE BENEFITS PLAN As Amended and Restated as of January 1, 2026 I. INTRODUCTION Effective January 1, 2026, certain executives who terminate employment with FirstEnergy Corp. or any of its operating companies to which benefits hereunder have been extended, as set forth below under “Participating Employers” (collectively, the “Company”), on account of a

FIRSTENERGY CORP. 2020 Incentive Compensation Plan 2026 Time-Based Restricted Stock Unit Award Agreement

Exhibit 10.3 FIRSTENERGY CORP. 2020 Incentive Compensation Plan 2026 Time-Based Restricted Stock Unit Award Agreement THIS 2026 TIME-BASED RESTRICTED STOCK UNIT AWARD AGREEMENT (the “Agreement”), effective as of #GrantDate#, (the “Grant Date”), is entered into by and between FirstEnergy Corp. (the “Company”) and #ParticipantName# (the “Grantee”) in accordance with the terms of the FirstEnergy Corp

FIRSTENERGY CORP. 2020 Incentive Compensation Plan 2026-2028 Performance-Adjusted Restricted Stock Unit Award Agreement

Exhibit 10.4 (Stock-Based Agreement) FIRSTENERGY CORP. 2020 Incentive Compensation Plan 2026-2028 Performance-Adjusted Restricted Stock Unit Award Agreement THIS 2026-2028 PERFORMANCE-ADJUSTED RESTRICTED STOCK UNIT AWARD AGREEMENT (the “Agreement”), effective as of #GrantDate#, (the “Grant Date”), is entered into by and between the Company and #ParticipantName# (the “Grantee”) in accordance with t

FIRSTENERGY CORP. EXECUTIVE CHANGE IN CONTROL SEVERANCE PLAN As Amended and Restated as of January 1, 2026

Exhibit 10.2 FIRSTENERGY CORP. EXECUTIVE CHANGE IN CONTROL SEVERANCE PLAN As Amended and Restated as of January 1, 2026 FirstEnergy Corp., an Ohio corporation, adopted this FirstEnergy Corp. Executive Change in Control Severance Plan (the “Plan”), originally effective as of January 1, 2017, which is hereby amended and restated, effective January 1, 2026 (the “Effective Date”). ARTICLE ONE GENERAL

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 23, 2025 FIRSTENERGY C

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 23, 2025 FIRSTENERGY CORP Exact name of Registrant as specified in its charter Ohio 333-21011 34-1843785 State or other jurisdiction of incorporation Commission File Number

Focused on Our Future 2Q 2025 Strategic & Financial Highlights Published July 30, 2025 Forward-Looking Statements Forward-Looking Statements: This presentation includes forward-looking statements based on information currently available to management

Focused on Our Future 2Q 2025 Strategic & Financial Highlights Published July 30, 2025 Forward-Looking Statements Forward-Looking Statements: This presentation includes forward-looking statements based on information currently available to management and unless the context requires otherwise, references to “we,” “us,” “our” and “FirstEnergy” refers to FirstEnergy Corp.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 30, 2025 Commission Registr

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 30, 2025 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An Oh

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 ☐ TRANSITION REPORT PU

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission Registrants; I.R.S. Employer File

FirstEnergy Announces Second Quarter 2025 Financial Results Reports second quarter 2025 GAAP earnings of $0.46 per share and Core Earnings (non-GAAP) of $0.52 per share, ahead of plan Reports June 2025 year-to-date GAAP earnings of $1.09 per share an

Exhibit 99.1 FirstEnergy Corp. For Release: July 30, 2025 341 White Pond Drive Akron, Ohio 44320 www.firstenergycorp.com News Media Contact: Investor Contact: Tricia Ingraham Karen Sagot (330) 384-5247 (330) 761-4286 FirstEnergy Announces Second Quarter 2025 Financial Results Reports second quarter 2025 GAAP earnings of $0.46 per share and Core Earnings (non-GAAP) of $0.52 per share, ahead of plan

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 11-K For Annual Reports of Employee Stock Purchase, Savings and Similar Plans Pursuant to Section 15(d) of the Securities Exchange Act of 1934 (Mark One) {X} ANNUAL REPORT P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 11-K For Annual Reports of Employee Stock Purchase, Savings and Similar Plans Pursuant to Section 15(d) of the Securities Exchange Act of 1934 (Mark One) {X} ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 OR { } TRANSITION REPORT PURSUANT TO SECTI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 17, 2025 FIRSTENERGY CORP E

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 17, 2025 FIRSTENERGY CORP Exact name of Registrant as specified in its charter Ohio 333-21011 34-1843785 State or other jurisdiction of incorporation Commission File Number I.R.

Indenture Relating to 3.625% Convertible Senior Notes due 2029, dated as of June 12, 2025, between FirstEnergy Corp. and The Bank of New York Mellon Trust Company, N.A., as trustee.

Exhibit 4.1 FIRSTENERGY CORP. AND THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., as Trustee INDENTURE Dated as of June 12, 2025 3.625% Convertible Senior Notes due 2029 TABLE OF CONTENTS Section 1.01. Definitions 1 Section 1.02. References to Interest 12 ARTICLE 2 ISSUE, DESCRIPTION, EXECUTION, REGISTRATION AND EXCHANGE OF NOTES Section 2.01. Designation and Amount 13 Section 2.02. Form of Notes

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 9, 2025 FIRSTENERGY CORP Ex

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 9, 2025 FIRSTENERGY CORP Exact name of Registrant as specified in its charter Ohio 333-21011 34-1843785 State or other jurisdiction of incorporation Commission File Number I.R.S

Indenture Relating to 3.875% Convertible Senior Notes due 2031, dated as of June 12, 2025, between FirstEnergy Corp. and The Bank of New York Mellon Trust Company, N.A., as trustee.

Exhibit 4.2 FIRSTENERGY CORP. AND THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., as Trustee INDENTURE Dated as of June 12, 2025 3.875% Convertible Senior Notes due 2031 TABLE OF CONTENTS Section 1.01. Definitions 1 Section 1.02. References to Interest 13 ARTICLE 2 ISSUE, DESCRIPTION, EXECUTION, REGISTRATION AND EXCHANGE OF NOTES Section 2.01. Designation and Amount 13 Section 2.02. Form of Notes

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 9, 2025 FIRSTENERGY CORP Ex

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 9, 2025 FIRSTENERGY CORP Exact name of Registrant as specified in its charter Ohio 333-21011 34-1843785 State or other jurisdiction of incorporation Commission File Number I.R.S

FirstEnergy Announces Proposed Offering of $950 Million of Convertible Senior Notes Due 2029 and $850 Million of Convertible Senior Notes Due 2031

Exhibit 99.1 FirstEnergy Corp. For Release: June 9, 2025 341 White Pond Drive Akron, Ohio 44320 www.firstenergycorp.com News Media Contact: Investor Contact: Tricia Ingraham Karen Sagot (330) 384-5247 (330) 761-4286 FirstEnergy Announces Proposed Offering of $950 Million of Convertible Senior Notes Due 2029 and $850 Million of Convertible Senior Notes Due 2031 AKRON, Ohio – FirstEnergy Corp. (NYSE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 9, 2025 FIRSTENERGY CORP Ex

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 9, 2025 FIRSTENERGY CORP Exact name of Registrant as specified in its charter Ohio 333-21011 34-1843785 State or other jurisdiction of incorporation Commission File Number I.R.S

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 21, 2025 Commission Registra

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 21, 2025 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An Ohi

Form of 2025-2027 Time Based Restricted Stock Unit Award Agreement

Exhibit 10.2 FIRSTENERGY CORP. 2020 Incentive Compensation Plan 2025 Time-Based Restricted Stock Unit Award Agreement THIS 2025 TIME-BASED RESTRICTED STOCK UNIT AWARD AGREEMENT (the “Agreement”), effective as of #GrantDate#, (the “Grant Date”), is entered into by and between FirstEnergy Corp. (the “Company”) and #ParticipantName# (the “Grantee”) in accordance with the terms of the FirstEnergy Corp

Form of 2025-2027 Performance-Adjusted Restricted Stock Unit Award Agreement

Exhibit 10.1 (Stock-Based Agreement) FIRSTENERGY CORP. 2020 Incentive Compensation Plan 2025-2027 Performance-Adjusted Restricted Stock Unit Award Agreement THIS 2025-2027 PERFORMANCE-ADJUSTED RESTRICTED STOCK UNIT AWARD AGREEMENT (the “Agreement”), effective as of #GrantDate#, (the “Grant Date”), is entered into by and between the Company and #ParticipantName# (the “Grantee”) in accordance with t

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 ☐ TRANSITION REPORT P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission Registrants; I.R.S. Employer Fil

Focused on Our Future 1Q 2025 Strategic & Financial Highlights Published April 23, 2025 Forward-Looking Statements Forward-Looking Statements: This presentation includes forward-looking statements based on information currently available to managemen

Focused on Our Future 1Q 2025 Strategic & Financial Highlights Published April 23, 2025 Forward-Looking Statements Forward-Looking Statements: This presentation includes forward-looking statements based on information currently available to management and unless the context requires otherwise, references to “we,” “us,” “our” and “FirstEnergy” refers to FirstEnergy Corp.

FirstEnergy Announces First Quarter 2025 Financial Results Reports significant improvement in first quarter 2025 GAAP earnings of $0.62 per share and Core Earnings (non-GAAP) of $0.67 per share, versus 2024 GAAP earnings of $0.44 per share and Core E

Exhibit 99.1 FirstEnergy Corp. For Release: April 23, 2025 341 White Pond Drive Akron, Ohio 44320 www.firstenergycorp.com News Media Contact: Investor Contact: Tricia Ingraham Karen Sagot (330) 384-5247 (330) 761-4286 FirstEnergy Announces First Quarter 2025 Financial Results Reports significant improvement in first quarter 2025 GAAP earnings of $0.62 per share and Core Earnings (non-GAAP) of $0.6

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 23, 2025 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An O

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitte

ARS

2024 Annual Report FirstEnergy Board of Directors Heidi L. Boyd Senior Managing Director of Blackstone Infrastructure Group Director of FirstEnergy since 2024 Jana T. Croom Chief Financial Officer of Kimball Electronics, Inc. Director of FirstEnergy since 2022 Steven J. Demetriou Executive chair of Amentum Holdings, Inc. Director of FirstEnergy since 2017 Lisa Winston Hicks Retired as Board Chair

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ C

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ De

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 24, 2025 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An O

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☑ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the FISCAL YEAR ended December 31, 2024 ☐ TRANSITION REPORT PURSUA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☑ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the FISCAL YEAR ended December 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission Registrant; State of Incorporation; I

List of Subsidiaries of the Registrant at December 31, 2024.

EXHIBIT 21 FIRSTENERGY CORP. LIST OF SUBSIDIARIES OF THE REGISTRANT As of December 31, 2024 FirstEnergy Service Company - Incorporated in Ohio FirstEnergy Pennsylvania Electric Company - Incorporated in Pennsylvania FirstEnergy Transmission, LLC - Organized in Delaware FirstEnergy Ventures Corp. - Incorporated in Ohio Jersey Central Power & Light Company - Incorporated in New Jersey Monongahela Po

Insider Trading Practice

FirstEnergy Business Practice Exhibit 19 Rev 2 3/23/2023 Insider Trading Practice Practice Owner: Corporate Secretary Practice Contact: Staff Business Analyst Purpose This Insider Trading Practice (the “Practice”) has been adopted to promote compliance with applicable securities laws and regulations, which prohibit certain persons who are aware of material nonpublic information (or “MNPI,” as such term is defined below) about FirstEnergy Corp.

Focused on Our Future 4Q 2024 Strategic & Financial Highlights Published February 26, 2025 Forward-Looking Statements This presentation includes forward-looking statements based on information currently available to management. Such statements are su

Focused on Our Future 4Q 2024 Strategic & Financial Highlights Published February 26, 2025 Forward-Looking Statements This presentation includes forward-looking statements based on information currently available to management.

FirstEnergy Announces Fourth Quarter and Full Year 2024 Financial Results Reports full year 2024 GAAP earnings of $1.70 per share and Operating (non-GAAP) earnings of $2.63 per share, within guidance range Customer-focused capital investments of $4.5

Exhibit 99.1 FirstEnergy Corp. For Release: February 26, 2025 76 South Main Street Akron, Ohio 44308 www.firstenergycorp.com News Media Contact: Investor Contact: Tricia Ingraham Karen Sagot (330) 384-5247 (330) 761-4286 FirstEnergy Announces Fourth Quarter and Full Year 2024 Financial Results Reports full year 2024 GAAP earnings of $1.70 per share and Operating (non-GAAP) earnings of $2.63 per sh

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 26, 2025 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (A

Focused on Our Future Annual Investor FactBook Published February 26, 2025 Table of Contents Investor FactBook - Published Feb. 26, 20252 5 Stand-Alone Transmission Segment 37 - 44 3 Distribution Segment 26 - 30 4 Integrated Segment 31 - 36 6 Additio

Focused on Our Future Annual Investor FactBook Published February 26, 2025 Table of Contents Investor FactBook - Published Feb.

FirstEnergy Names Brian X. Tierney Chair of the Board Current Chair John W. Somerhalder II to remain on the Board; Lisa Winston Hicks to remain Lead Independent Director

Exhibit 99.1 FirstEnergy Corp. For Release: December 18, 2024 76 South Main Street Akron, Ohio 44308 www.firstenergycorp.com News Media Contact: Investor Relations Contact: Jennifer Young Karen Sagot (330) 761-4362 (551) 427-3083 FirstEnergy Names Brian X. Tierney Chair of the Board Current Chair John W. Somerhalder II to remain on the Board; Lisa Winston Hicks to remain Lead Independent Director

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 18, 2024 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (A

FE / FirstEnergy Corp. / Capital World Investors - SEC SCHEDULE 13G Passive Investment

SC 13G/A 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2 )* FirstEnergy Corp. (Name of Issuer) Common Stock (Title of Class of Securities) 337932107 (CUSIP Number) September 30, 2024 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to

Focused on Our Future 2024 EEI Financial Conference Published November 8, 2024 EEI – Published November 8, 20242 FirstEnergy Overview $51B Total Assets 6M+ Total Customers 24K Transmission Miles 65K Square Miles of Service Territory 12K Employees $29

Focused on Our Future 2024 EEI Financial Conference Published November 8, 2024 EEI – Published November 8, 20242 FirstEnergy Overview $51B Total Assets 6M+ Total Customers 24K Transmission Miles 65K Square Miles of Service Territory 12K Employees $29B 2024F Rate Base Distribution Segment • OH & PA – Distribution only • ~45% of 2024F EPS Integrated Segment • WV, MD & NJ – Distribution, Transmission

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 8, 2024 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 ☐ TRANSITION REPO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission Registrant; State of Incorpo

Amendment No. 1 to Credit Agreement and Consent, dated as of October 24, 2024, among FET, as borrower, the banks and other financial institutions party thereto, as lenders, and JPMorgan Chase Bank, N.A., as administrative agent

Exhibit 10.8 AMENDMENT NO. 1 TO CREDIT AGREEMENT dated as of October 24, 2024 among FIRSTENERGY TRANSMISSION, LLC, as Borrower, THE LENDERS NAMED HEREIN, as Lenders, JPMORGAN CHASE BANK, N.A., as Administrative Agent, and THE FRONTING BANKS NAMED HEREIN, as Fronting Banks JPMORGAN CHASE BANK, N.A. PNC CAPITAL MARKETS LLC BARCLAYS BANK PLC BofA SECURITIES, INC. WELLS FARGO SECURITIES, LLC MIZUHO BA

Amendment No. 3 to Credit Agreement, dated as of October 24, 2024, among MP and PE, the banks and other financial institutions party thereto, as lenders, and Mizuho Bank, Ltd., as administrative agent

Exhibit 10.6 , AMENDMENT NO. 3 TO CREDIT AGREEMENT dated as of October 24, 2024 among MONONGAHELA POWER COMPANY, and THE POTOMAC EDISON COMPANY, as Borrowers, THE LENDERS NAMED HEREIN, as Lenders, MIZUHO BANK, LTD., as Administrative Agent, and THE FRONTING BANKS NAMED HEREIN, as Fronting Banks JPMORGAN CHASE BANK, N.A. PNC CAPITAL MARKETS LLC MUFG BANK, LTD. BofA SECURITIES, INC. WELLS FARGO SECU

Amendment No. 3 to Credit Agreement, dated as of October 24, 2024, among FE, as borrower, the banks and other financial institutions party thereto, as lenders, and JPMorgan Chase Bank, N.A., as administrative agent

Exhibit 10.2 AMENDMENT NO. 3 TO CREDIT AGREEMENT dated as of October 24, 2024 among FIRSTENERGY CORP., as Borrower, THE LENDERS NAMED HEREIN, as Lenders, JPMORGAN CHASE BANK, N.A., as Administrative Agent, and THE FRONTING BANKS NAMED HEREIN, as Fronting Banks JPMORGAN CHASE BANK, N.A. PNC CAPITAL MARKETS LLC MUFG BANK, LTD. BARCLAYS BANK PLC BofA SECURITIES, INC. MIZUHO BANK, LTD. CITIBANK, N.A.

Severance Agreement and Release of Claims of Christine L. Walker (incorporated by reference to FE’s Form 10-Q filed October 29, 2024, Exhibit 10.1, File No. 333-21011).

Exhibit 10.1 SEVERANCE AGREEMENT AND RELEASE OF CLAIMS FirstEnergy Corp. (collectively with its predecessors, successors, parents, assigns, subsidiaries, and affiliates, “FirstEnergy”) and Christine Walker (“Executive”) hereby enter into this Severance Agreement and Release of Claims (the “Agreement”) and agree as follows. WHEREAS, Executive is currently employed by FirstEnergy; WHEREAS, as a resu

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 29, 2024 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An

Focused on Our Future 3Q 2024 Strategic & Financial Highlights Published October 29, 2024 Forward-Looking Statements Forward-Looking Statements: This presentation includes forward-looking statements based on information currently available to managem

Focused on Our Future 3Q 2024 Strategic & Financial Highlights Published October 29, 2024 Forward-Looking Statements Forward-Looking Statements: This presentation includes forward-looking statements based on information currently available to management.

Amendment No. 1 to Credit Agreement, dated as of October 24, 2024, among KATCo, as borrower, the banks and other financial institutions party thereto, as lenders, and PNC Bank, National Association, as administrative agent

Exhibit 10.9 AMENDMENT NO. 1 TO CREDIT AGREEMENT dated as of October 24, 2024 among KEYSTONE APPALACHIAN TRANSMISSION CO., as Borrower, THE LENDERS NAMED HEREIN, as Lenders, PNC BANK, NATIONAL ASSOCIATION, as Administrative Agent, and THE FRONTING BANKS NAMED HEREIN, as Fronting Banks JPMORGAN CHASE BANK, N.A. PNC CAPITAL MARKETS LLC MUFG BANK, LTD. BARCLAYS BANK PLC BofA SECURITIES, INC. WELLS FA

FirstEnergy Announces Third Quarter 2024 Financial Results Reports third quarter 2024 GAAP earnings from continuing operations of $0.73 per share and operating (non-GAAP) earnings of $0.85 per share, within guidance range Narrows full-year 2024 opera

Exhibit 99.1 FirstEnergy Corp. For Release: October 29, 2024 76 South Main Street Akron, Ohio 44308 www.firstenergycorp.com News Media Contact: Investor Contact: Tricia Ingraham Gina Caskey (330) 384-5247 (330) 761-4185 FirstEnergy Announces Third Quarter 2024 Financial Results Reports third quarter 2024 GAAP earnings from continuing operations of $0.73 per share and operating (non-GAAP) earnings

Amendment No. 3 to Credit Agreement, dated as of October 24, 2024, among CEI, OE and TE, as borrowers, the banks and other financial institutions party thereto, as lenders, and JPMorgan Chase Bank, N.A., as administrative agent

Exhibit 10.3 AMENDMENT NO. 3 TO CREDIT AGREEMENT dated as of October 24, 2024 among THE CLEVELAND ELECTRIC ILLUMINATING COMPANY, OHIO EDISON COMPANY, and THE TOLEDO EDISON COMPANY, as Borrowers, THE LENDERS NAMED HEREIN, as Lenders, JPMORGAN CHASE BANK, N.A., as Administrative Agent, and THE FRONTING BANKS NAMED HEREIN, as Fronting Banks JPMORGAN CHASE BANK, N.A. PNC CAPITAL MARKETS LLC MUFG BANK,

Amendment No. 3 to Credit Agreement, dated as of October 24, 2024, among ATSI, MAIT and TrAIL, as borrower, the banks and other financial institutions party thereto, as lenders, and PNC Bank, National Association, as administrative agent

Exhibit 10.7 AMENDMENT NO. 3 TO CREDIT AGREEMENT dated as of October 24, 2024 among AMERICAN TRANSMISSION SYSTEMS, INCORPORATED, MID-ATLANTIC INTERSTATE TRANSMISSION, LLC, and TRANS-ALLEGHENY INTERSTATE LINE COMPANY, as Borrowers, THE LENDERS NAMED HEREIN, as Lenders, PNC BANK, NATIONAL ASSOCIATION, as Administrative Agent, and THE FRONTING BANKS NAMED HEREIN, as Fronting Banks JPMORGAN CHASE BANK

Amendment No. 3 to Credit Agreement, dated as of October 24, 2024, among JCP&L, as borrower, the banks and other financial institutions party thereto, as lenders, and Mizuho Bank, Ltd., as administrative agent

Exhibit 10.5 AMENDMENT NO. 3 TO CREDIT AGREEMENT dated as of October 24, 2024 among JERSEY CENTRAL POWER & LIGHT COMPANY, as Borrower, THE LENDERS NAMED HEREIN, as Lenders, MIZUHO BANK, LTD., as Administrative Agent, and THE FRONTING BANKS NAMED HEREIN, as Fronting Banks JPMORGAN CHASE BANK, N.A. PNC CAPITAL MARKETS LLC MUFG BANK, LTD. BARCLAYS BANK PLC BofA SECURITIES, INC. MIZUHO BANK, LTD. CITI

Amendment No. 3 to Credit Agreement, dated as of October 24, 2024, among FE PA, as borrower, the banks and other financial institutions party thereto, as lenders, and Mizuho Bank, Ltd., as administrative agent

Exhibit 10.4 AMENDMENT NO. 3 TO CREDIT AGREEMENT dated as of October 24, 2024 among FIRSTENERGY PENNSYLVANIA ELECTRIC COMPANY, as Borrower, THE LENDERS NAMED HEREIN, as Lenders, MIZUHO BANK, LTD. as Administrative Agent, and THE FRONTING BANKS NAMED HEREIN, as Fronting Banks JPMORGAN CHASE BANK, N.A. PNC CAPITAL MARKETS LLC MUFG BANK, LTD. BARCLAYS BANK PLC BofA SECURITIES, INC. MIZUHO BANK, LTD.

FE / FirstEnergy Corp. / GIC Private Ltd - SC 13G/A Passive Investment

SC 13G/A 1 ef20037594sc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2) * FirstEnergy Corp (Name of Issuer) Common Stock, $0.10 par value (Title of Class of Securities) 337932107 (CUSIP Number) September 30, 2024 (Date of the Event Which Requires Filing of this Statement) Check the app

Regulation FD Disclosure, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 12, 2024 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (

FirstEnergy Announces Settlement Agreement with U.S. Securities and Exchange Commission

Exhibit 99.1 FirstEnergy Corp. For Release: September 12, 2024 76 South Main Street Akron, Ohio 44308 www.firstenergycorp.com News Media Contact: Investor Relations Contact: Jennifer Young Gina Caskey (330) 761-4362 (330) 761-4185 [email protected] [email protected] FirstEnergy Announces Settlement Agreement with U.S. Securities and Exchange Commission AKRON, Ohio – FirstEnergy

UNITED STATES OF AMERICA Before the SECURITIES AND EXCHANGE COMMISSION

Exhibit 99.2 UNITED STATES OF AMERICA Before the SECURITIES AND EXCHANGE COMMISSION SECURITIES ACT OF 1933 Release No. 11302 / September 12, 2024 SECURITIES EXCHANGE ACT OF 1934 Release No. 101014 / September 12, 2024 ACCOUNTING AND AUDITING ENFORCEMENT Release No. 4519 / September 12, 2024 ADMINISTRATIVE PROCEEDING File No. 3-22111 In the Matter of FIRSTENERGY CORP., Respondent. ORDER INSTITUTING

Terms and Obligations

Exhibit 99.2 AGREEMENT This agreement (the “Agreement”) entered into between the Office of the Ohio Attorney General and the Office of the Summit County Prosecutor (jointly, the “State of Ohio”), and FirstEnergy Corp.1 (“FirstEnergy” or the “Company”) (together with the State of Ohio, the “Parties”) on the grounds, and for the reasons, stated herein. Recitals 1.The State of Ohio has conducted a th

FirstEnergy Resolves Proceedings with Office of the Ohio Attorney General and Office of the Summit County Prosecutor

Exhibit 99.1 FirstEnergy Corp. For Release: August 13, 2024 76 South Main Street Akron, Ohio 44308 www.firstenergycorp.com News Media Contact: Investor Relations Contact: Jennifer Young Gina Caskey (330) 761-4362 (330) 761-4185 [email protected] [email protected] FirstEnergy Resolves Proceedings with Office of the Ohio Attorney General and Office of the Summit County Prosecutor

Regulation FD Disclosure, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 12, 2024 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An

FirstEnergy Announces Second Quarter 2024 Financial Results Reports second quarter 2024 GAAP earnings of $0.08 per share and operating (non-GAAP) earnings of $0.56 per share, above the midpoint of guidance and a 19% increase compared to the second qu

Exhibit 99.1 FirstEnergy Corp. For Release: July 30, 2024 76 South Main Street Akron, Ohio 44308 www.firstenergycorp.com News Media Contact: Investor Contact: Tricia Ingraham Gina Caskey (330) 384-5247 (330) 761-4185 FirstEnergy Announces Second Quarter 2024 Financial Results Reports second quarter 2024 GAAP earnings of $0.08 per share and operating (non-GAAP) earnings of $0.56 per share, above th

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 ☐ TRANSITION REPORT PU

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission Registrant; State of Incorporatio

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 30, 2024 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An Oh

Focused on Our Future 2Q 2024 Strategic & Financial Highlights Published July 30, 2024 Forward-Looking Statements 2 This presentation includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 based

Focused on Our Future 2Q 2024 Strategic & Financial Highlights Published July 30, 2024 Forward-Looking Statements 2 This presentation includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 based on information currently available to management.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 21, 2024 Commission Registr

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 21, 2024 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An Oh

UNITED STATES DISTRICT COURT SOUTHERN DISTRICT OF OHIO WESTERN DIVISION

Exhibit 99.1 Case: 1:21-cr-00086-TSB Doc #: 11 Filed: 07/21/24 Page: 1 of 3 PAGEID #: 148 UNITED STATES DISTRICT COURT SOUTHERN DISTRICT OF OHIO WESTERN DIVISION UNITED STATES OF AMERICA, Plaintiff, v. FIRSTENERGY CORP., Defendant. : : : : : : : : : : CASE NO. 1:21-CR-00086 JUDGE BLACK S T AT U S RE P O RT On July 22, 2021, the United States Attorney’s Office for the Southern District of Ohio (“US

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 11-K For Annual Reports of Employee Stock Purchase, Savings and Similar Plans Pursuant to Section 15(d) of the Securities Exchange Act of 1934 (Mark One) {X} ANNUAL REPORT P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 11-K For Annual Reports of Employee Stock Purchase, Savings and Similar Plans Pursuant to Section 15(d) of the Securities Exchange Act of 1934 (Mark One) {X} ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 OR { } TRANSITION REPORT PURSUANT TO SECTI

Focused on Our Future June 2024 Investor Meetings June 2024 FirstEnergy is a Different Company June 20242 A Strong Balance Sheet A Significant Platform for Growth A New Operating Model A New Management Team An Enhanced Culture Focused on Accountabili

ex9916-4x2024june2024inv Focused on Our Future June 2024 Investor Meetings June 2024 FirstEnergy is a Different Company June 20242 A Strong Balance Sheet A Significant Platform for Growth A New Operating Model A New Management Team An Enhanced Culture Focused on Accountability and Driving Results Strategic Plan Invest in regulated properties, improve the customer experience and enable the energy transition June 20243 CapEx from $4.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 4, 2024 Commission Registra

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 4, 2024 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An Ohi

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 22, 2024 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An Ohi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ C

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 25, 2024 Commission Regist

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 25, 2024 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An O

Focused on Our Future 1Q 2024 Strategic & Financial Highlights Published April 25, 2024 Forward-Looking Statements 2 This presentation includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 base

ex9921q24highlightsxvfi Focused on Our Future 1Q 2024 Strategic & Financial Highlights Published April 25, 2024 Forward-Looking Statements 2 This presentation includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 based on information currently available to management.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 ☐ TRANSITION REPORT P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission Registrant; State of Incorporati

FirstEnergy Announces First Quarter 2024 Financial Results Reports first quarter 2024 GAAP earnings of $0.44 per share and operating (non-GAAP) earnings of $0.55 per share, above the midpoint of guidance Affirms targeted 6-8% long-term annual operati

Exhibit 99.1 FirstEnergy Corp. For Release: April 25, 2024 76 South Main Street Akron, Ohio 44308 www.firstenergycorp.com News Media Contact: Investor Contact: Tricia Ingraham Irene Prezelj (330) 384-5247 (330) 384-3859 FirstEnergy Announces First Quarter 2024 Financial Results Reports first quarter 2024 GAAP earnings of $0.44 per share and operating (non-GAAP) earnings of $0.55 per share, above t

Form of 2024-2026 Stock-Based Performance-Adjusted Restricted Stock Unit Award Agreement

Exhibit 10.3 (Stock-Based Agreement) FIRSTENERGY CORP. 2020 Incentive Compensation Plan 2024-2026 Performance-Adjusted Restricted Stock Unit Award Agreement THIS 2024-2026 PERFORMANCE-ADJUSTED RESTRICTED STOCK UNIT AWARD AGREEMENT (the “Agreement”), effective as of #GrantDate#, 2024 (the “Grant Date”), is entered into by and between the Company and #ParticipantName# (the “Grantee”) in accordance w

Form of 2024-2026 Cash-Based Performance-Adjusted Restricted Stock Unit Award Agreement

Exhibit 10.2 (Cash-Based Agreement) FIRSTENERGY CORP. 2020 Incentive Compensation Plan 2024-2026 Performance-Adjusted Restricted Stock Unit Award Agreement THIS 2024-2026 PERFORMANCE-ADJUSTED RESTRICTED STOCK UNIT AWARD AGREEMENT (the “Agreement”), effective as of #GrantDate#, 2024 (the “Grant Date”), is entered into by and between the Company and #ParticipantName# (the “Grantee”) in accordance wi

ARS

2023 Annual Report FirstEnergy Board of Directors Heidi L. Boyd Senior 0 anaging ' irector at Blackstone Director of FirstEnergy since 2024 Jana T. Croom Chief ) inancial 2 fficer of Kimball Electronics, Inc. Director of FirstEnergy since 2022 Steven J. Demetriou Executive % oard & hair of Jacobs Solutions Inc. Director of FirstEnergy since 2017 Lisa Winston Hicks Retired as % oard & hair of MV Tr

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitte

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ C

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive

FirstEnergy Closes on $3.5 Billion FirstEnergy Transmission, LLC 30% Interest Sale Follow-on investment by Brookfield Super-Core Infrastructure Partners strengthens FirstEnergy’s balance sheet, supports sustainable, long-term growth through industry-

Exhibit 99.1 FirstEnergy Corp. For Release: March 25, 2024 76 South Main Street Akron, Ohio 44308 www.firstenergycorp.com News Media Contact: Investor Contact: Tricia Ingraham Irene Prezelj (330) 384-5247 (330) 384-3859 FirstEnergy Closes on $3.5 Billion FirstEnergy Transmission, LLC 30% Interest Sale Follow-on investment by Brookfield Super-Core Infrastructure Partners strengthens FirstEnergy’s b

Fourth Amended and Restated Limited Liability Company Agreement of FirstEnergy Transmission, LLC, dated March

NAI-1534815718v11 EXECUTION VERSION CONFIDENTIAL FOURTH AMENDED AND RESTATED LIMITED LIABILITY COMPANY AGREEMENT OF FIRSTENERGY TRANSMISSION, LLC Exhibit 10.

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 25, 2024 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An O

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K/A Amendment No. 1 CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 14, 2024 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY

FE / FirstEnergy Corp. / BlackRock Inc. Passive Investment

SC 13G/A 1 us3379321074022924.txt us3379321074022924.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 15) FIRSTENERGY CORP - (Name of Issuer) Common Stock - (Title of Class of Securities) 337932107 - (CUSIP Number) December 31, 2023 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 14, 2024 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (A

List of Subsidiaries of the Registrant at December 31, 2023.

EXHIBIT 21 FIRSTENERGY CORP. LIST OF SUBSIDIARIES OF THE REGISTRANT As of December 31, 2023 FirstEnergy Service Company - Incorporated in Ohio FirstEnergy Transmission, LLC - Organized in Delaware FirstEnergy Ventures Corp. - Incorporated in Ohio Jersey Central Power & Light Company - Incorporated in New Jersey Metropolitan Edison Company1 - Incorporated in Pennsylvania Monongahela Power Company -

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☑ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the FISCAL YEAR ended December 31, 2023 ☐ TRANSITION REPORT PURSUA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☑ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the FISCAL YEAR ended December 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission Registrant; State of Incorporation; I

FE / FirstEnergy Corp. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 10)* Name of issuer: FirstEnergy Corp Title of Class of Securities: Common Stock CUSIP Number: 337932107 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ R

elating to

Exhibit 97 FIRSTENERGY CORP. Compensation Clawback Policy Effective October 2, 2023 Purpose As required pursuant to the listing standards of the New York Stock Exchange (the “Stock Exchange”), Section 10D of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and Rule 10D-1 under the Exchange Act, the Board of Directors (the “Board”) of FirstEnergy Corp. (the “Company”) has adopt

FE / FirstEnergy Corp. / GIC Private Ltd - SC 13G/A Passive Investment

SC 13G/A 1 ef20021206sc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1) * FirstEnergy Corp (Name of Issuer) Common Stock, $0.10 par value (Title of Class of Securities) 337932107 (CUSIP Number) December 31, 2023 (Date of the Event Which Requires Filing of this Statement) Check the appr

FE / FirstEnergy Corp. / Capital World Investors - SEC SCHEDULE 13G Passive Investment

SC 13G/A 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1 )* FirstEnergy Corp. (Name of Issuer) Common Stock (Title of Class of Securities) 337932107 (CUSIP Number) December 29, 2023 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to d

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 8, 2024 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An

FirstEnergy Announces Fourth Quarter and Full Year 2023 Financial Results Reports full year 2023 GAAP earnings from continuing operations of $1.96 per share Delivers 2023 Operating (non-GAAP) earnings of $2.56 per share, above the midpoint of guidanc

Exhibit 99.1 FirstEnergy Corp. For Release: February 8, 2024 76 South Main Street Akron, Ohio 44308 www.firstenergycorp.com News Media Contact: Investor Contact: Tricia Ingraham Irene Prezelj (330) 384-5247 (330) 384-3859 FirstEnergy Announces Fourth Quarter and Full Year 2023 Financial Results Reports full year 2023 GAAP earnings from continuing operations of $1.96 per share Delivers 2023 Operati

Focused on Our Future Annual Investor FactBook Published February 8, 2024 Table of Contents Investor FactBook - Published February 8, 20242 5 Stand-Alone Transmission Segment 54 - 61 3 Distribution Segment 35 - 42 4 Integrated Segment 43 - 53 6 Corpo

Focused on Our Future Annual Investor FactBook Published February 8, 2024 Table of Contents Investor FactBook - Published February 8, 20242 5 Stand-Alone Transmission Segment 54 - 61 3 Distribution Segment 35 - 42 4 Integrated Segment 43 - 53 6 Corporate Responsibility/EESG 62 - 74 7 IR Contacts & Other Information 75 - 81 2 Financial Guidance 14 - 34 1 FirstEnergy Overview 3 - 13 Unless otherwise noted, all numbers are as of December 31, 2023.

Focused on Our Future 4Q 2023 Strategic & Financial Highlights Published February 8, 2024 Forward-Looking Statements 2 This presentation includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 ba

Focused on Our Future 4Q 2023 Strategic & Financial Highlights Published February 8, 2024 Forward-Looking Statements 2 This presentation includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 based on information currently available to management.

FE / FirstEnergy Corp. / STATE STREET CORP Passive Investment

SC 13G/A 1 FirstEnergyCorp.txt UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 AMENDED FILING FIRSTENERGY CORP (NAME OF ISSUER) COMMON STOCK (TITLE OF CLASS OF SECURITIES) 337932107 (CUSIP NUMBER) 12/31/2023 (DATE OF EVENT WHICH REQUIRES FILING OF THIS STATEMENT) CHECK THE APPROPRIATE BOX TO DESIGNATE THE RULE PURSUANT

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 8, 2023 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An

FirstEnergy Appoints Two Senior Executives to Accelerate Transformation into Premier Electric Utility Wade Smith Joins Company as President, FirstEnergy Utilities; Toby L. Thomas Joins as Chief Operating Officer

Exhibit 99.1 FirstEnergy Corp. For Release: November 21, 2023 76 South Main Street Akron, Ohio 44308 www.firstenergycorp.com News Media Contact: Investor Contact: Jennifer Young Irene Prezelj (216) 337-8789 (330) 384-3859 [email protected] [email protected] FirstEnergy Appoints Two Senior Executives to Accelerate Transformation into Premier Electric Utility Wade Smith Joins Comp

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 10, 2023 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (A

FE / Firstenergy Corp. / Capital World Investors - SEC SCHEDULE 13G Passive Investment

SC 13G 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* FirstEnergy Corp. (Name of Issuer) Common Stock (Title of Class of Securities) 337932107 (CUSIP Number) October 31, 2023 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to design

Amendment No. 2 to Credit Agreement, dated as of October 20, 2023, by and among Monongahela Power Company, The Potomac Edison Company, the banks and other financial institutions party thereto on the date hereof, as lenders, and Mizuho Bank, Ltd, as administrative agent. (incorporated by reference to FE’s Form 10-Q filed October 26, 2023, Exhibit 10.6, File No. 333-21011).

Exhibit 10.6 EXECUTION VERSION AMENDMENT NO. 2 TO CREDIT AGREEMENT dated as of October 20, 2023 among MONONGAHELA POWER COMPANY, and THE POTOMAC EDISON COMPANY, as Borrowers, THE LENDERS NAMED HEREIN, as Lenders, MIZUHO BANK, LTD., as Administrative Agent, and THE FRONTING BANKS NAMED HEREIN, as Fronting Banks JPMORGAN CHASE BANK, N.A. PNC CAPITAL MARKETS LLC MUFG BANK, LTD. BARCLAYS BANK PLC BofA

Amendment No. 2 to Credit Agreement, dated as of October 20, 2023, by and among Jersey Central Power & Light Company, the banks and other financial institutions party thereto on the date hereof, as lenders, and Mizuho Bank, Ltd., as administrative agent. (incorporated by reference to FE’s Form 10-Q filed October 26, 2023, Exhibit 10.5, File No. 333-21011).

Exhibit 10.5 EXECUTION VERSION AMENDMENT NO. 2 TO CREDIT AGREEMENT dated as of October 20, 2023 among JERSEY CENTRAL POWER & LIGHT COMPANY, as Borrower, THE LENDERS NAMED HEREIN, as Lenders, MIZUHO BANK, LTD., as Administrative Agent, and THE FRONTING BANKS NAMED HEREIN, as Fronting Banks JPMORGAN CHASE BANK, N.A. PNC CAPITAL MARKETS LLC MUFG BANK, LTD. BARCLAYS BANK PLC BofA SECURITIES, INC. MIZU

Credit Agreement, dated as of October 20, 2023, by and among Keystone Appalachian Transmission Company, the banks and other financial institutions party thereto on the date hereof, as lenders, and PNC Bank, National Association, as administrative agent. (incorporated by reference to FE’s Form 10-Q filed October 26, 2023, Exhibit 10.7, File No. 333-21011).

Exhibit 10.7 EXECUTION VERSION U.S. $150,000,000 CREDIT AGREEMENT dated as of October 20, 2023, by and among KEYSTONE APPALACHIAN TRANSMISSION CO., as Borrower, THE BANKS NAMED HEREIN, as Banks, PNC BANK, NATIONAL ASSOCIATION, as Administrative Agent, and THE FRONTING BANKS PARTY HERETO FROM TIME TO TIME as Fronting Banks JPMORGAN CHASE BANK, N.A. PNC CAPITAL MARKETS LLC BARCLAYS BANK PLC BofA SEC

3Q 2023 Strategic & Financial Highlights Brian X. Tierney, President & CEO K. Jon Taylor, SVP & CFO Forward-Looking Statements 2 Forward-Looking Statements: This presentation includes forward-looking statements within the meaning of the Private Secur

3Q 2023 Strategic & Financial Highlights Brian X. Tierney, President & CEO K. Jon Taylor, SVP & CFO Forward-Looking Statements 2 Forward-Looking Statements: This presentation includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 based on information currently available to management. Such statements are subject to certain risks and uncertain

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 ☐ TRANSITION REPO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission Registrant; State of Incorpo

Credit Agreement, dated as of October 20, 2023, by and among FirstEnergy Transmission, LLC, the banks and other financial institutions party thereto on the date hereof, as lenders, and JPMorgan Chase Bank, N.A., as administrative agent. (incorporated by reference to FE’s Form 10-Q filed October 26, 2023, Exhibit 10.8, File No. 333-21011).

Exhibit 10.8 EXECUTION VERSION U.S. $1,000,000,000 CREDIT AGREEMENT dated as of October 20, 2023, by and among FIRSTENERGY TRANSMISSION, LLC, as Borrower, THE BANKS NAMED HEREIN, as Banks, JPMORGAN CHASE BANK, N.A., as Administrative Agent, and THE FRONTING BANKS PARTY HERETO FROM TIME TO TIME as Fronting Banks JPMORGAN CHASE BANK, N.A. PNC CAPITAL MARKETS LLC BARCLAYS BANK PLC BofA SECURITIES, IN

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 26, 2023 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An

Amendment No. 2 and Consent and Limited Waiver to Credit Agreement, dated as of October 20, 2023, by and among FirstEnergy Corp., the banks and other financial institutions party thereto, as lenders, and JPMorgan Chase Bank, N.A., as administrative agent. (incorporated by reference to FE’s Form 10-Q filed October 26, 2023, Exhibit 10.1, File No. 333-21011).

Exhibit 10.1 EXECUTION VERSION AMENDMENT NO. 2 TO CREDIT AGREEMENT AND CONSENT, LIMITED WAIVER AND LIMITED RELEASE dated as of October 20, 2023 among FIRSTENERGY CORP., as Borrower, FIRSTENERGY TRANSMISSION, LLC, as Exiting Borrower, THE LENDERS NAMED HEREIN, as Lenders, JPMORGAN CHASE BANK, N.A., as Administrative Agent, and THE FRONTING BANKS NAMED HEREIN, as Fronting Banks JPMORGAN CHASE BANK,

FirstEnergy Announces Third Quarter 2023 Financial Results Reports third quarter 2023 GAAP earnings from continuing operations of $0.74 per share and operating (non-GAAP) earnings of $0.88 per share Narrows 2023 operating guidance around midpoint and

Exhibit 99.1 FirstEnergy Corp. For Release: October 26, 2023 76 South Main Street Akron, Ohio 44308 www.firstenergycorp.com News Media Contact: Investor Contact: Tricia Ingraham Irene Prezelj (330) 384-5247 (330) 384-3859 FirstEnergy Announces Third Quarter 2023 Financial Results Reports third quarter 2023 GAAP earnings from continuing operations of $0.74 per share and operating (non-GAAP) earning

Amendment No. 2 and Consent and Limited Waiver to Credit Agreement, dated as of October 20, 2023, by and among The Cleveland Electric Illuminating Company, Ohio Edison Company, The Toledo Edison Company, the banks and other financial institutions party thereto, as lenders, and JPMorgan Chase Bank, N.A., as administrative agent. (incorporated by reference to FE’s Form 10-Q filed October 26, 2023, Exhibit 10.2, File No. 333-21011).

Exhibit 10.2 EXECUTION VERSION AMENDMENT NO. 2 TO CREDIT AGREEMENT AND CONSENT AND LIMITED WAIVER dated as of October 20, 2023 among THE CLEVELAND ELECTRIC ILLUMINATING COMPANY, OHIO EDISON COMPANY, and THE TOLEDO EDISON COMPANY, as Borrowers, THE LENDERS NAMED HEREIN, as Lenders, JPMORGAN CHASE BANK, N.A., as Administrative Agent, and THE FRONTING BANKS NAMED HEREIN, as Fronting Banks JPMORGAN CH

Amendment No. 2 and Consent and Limited Waiver to Credit Agreement, dated as of October 20, 2023, by and among Metropolitan Edison Company, Pennsylvania Power Company, Pennsylvania Electric Company, West Penn Power Company, the banks and other financial institutions party thereto on the date hereof, as lenders, and Mizuho Bank, Ltd., as administrative agent. (incorporated by reference to FE’s Form 10-Q filed October 26, 2023, Exhibit 10.3, File No. 333-21011).

Exhibit 10.3 EXECUTION VERSION AMENDMENT NO. 2 TO CREDIT AGREEMENT AND CONSENT AND LIMITED WAIVER dated as of October 20, 2023 among METROPOLITAN EDISON COMPANY, PENNSYLVANIA POWER COMPANY, PENNSYLVANIA ELECTRIC COMPANY and WEST PENN POWER COMPANY, as Borrowers, THE LENDERS NAMED HEREIN, as Lenders, MIZUHO BANK, LTD. as Administrative Agent, and THE FRONTING BANKS NAMED HEREIN, as Fronting Banks J

Amendment No. 2 and Consent and Limited Waiver to Credit Agreement, dated as of October 20, 2023, by and among American Transmission Systems, Incorporated, Mid-Atlantic Interstate Transmission, LLC, Trans-Allegheny Interstate Line Company, the banks and other financial institutions party thereto on the date hereof, as lenders, and PNC Bank, National Association, as administrative agent. (incorporated by reference to FE’s Form 10-Q filed October 26, 2023, Exhibit 10.4, File No. 333-21011).

Exhibit 10.4 EXECUTION VERSION AMENDMENT NO. 2 TO CREDIT AGREEMENT AND CONSENT AND LIMITED WAIVER dated as of October 20, 2023 among AMERICAN TRANSMISSION SYSTEMS, INCORPORATED, MID-ATLANTIC INTERSTATE TRANSMISSION, LLC, and TRANS-ALLEGHENY INTERSTATE LINE COMPANY, as Borrowers, THE LENDERS NAMED HEREIN, as Lenders, PNC BANK, NATIONAL ASSOCIATION, as Administrative Agent, and THE FRONTING BANKS NA

Form of 2023-2025 Stock-Based Performance-Adjusted Restricted Stock Unit Award Agreement

Exhibit 10.8 (Stock-Based Agreement) FIRSTENERGY CORP. 2020 Incentive Compensation Plan 2023-2025 Performance-Adjusted Restricted Stock Unit Award Agreement THIS 2023-2025 PERFORMANCE-ADJUSTED RESTRICTED STOCK UNIT AWARD AGREEMENT (the “Agreement”), effective as of [GRANT DATE], 2023 (the “Grant Date”), is entered into by and between the Company and [PARTICIPANT NAME] (the “Grantee”). 1. Definitio

2Q 2023 Strategic & Financial Highlights Brian X. Tierney, President & CEO K. Jon Taylor, SVP & CFO Forward-Looking Statements 2 Forward-Looking Statements: This presentation includes forward-looking statements within the meaning of the Private Secur

2Q 2023 Strategic & Financial Highlights Brian X. Tierney, President & CEO K. Jon Taylor, SVP & CFO Forward-Looking Statements 2 Forward-Looking Statements: This presentation includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 based on information currently available to management. Such statements are subject to certain risks and uncertain

FirstEnergy Announces Second Quarter 2023 Financial Results Reports second quarter 2023 GAAP earnings of $0.41 per share and operating (non-GAAP) earnings of $0.47 per share Affirms 2023 operating guidance and provides outlook for the third quarter A

Exhibit 99.1 FirstEnergy Corp. For Release: August 1, 2023 76 South Main Street Akron, Ohio 44308 www.firstenergycorp.com News Media Contact: Investor Contact: Tricia Ingraham Irene Prezelj (330) 384-5247 (330) 384-3859 FirstEnergy Announces Second Quarter 2023 Financial Results Reports second quarter 2023 GAAP earnings of $0.41 per share and operating (non-GAAP) earnings of $0.47 per share Affirm

Form of 2023-2025 Cash-Based Performance-Adjusted Restricted Stock Unit Award Agreement (incorporated by reference to FE’s Form 10-Q filed August 1, 2023, Exhibit 10.7, File No. 333-21011).

Exhibit 10.7 (Cash-Based Agreement) FIRSTENERGY CORP. 2020 Incentive Compensation Plan 2023-2025 Performance-Adjusted Restricted Stock Unit Award Agreement THIS 2023-2025 PERFORMANCE-ADJUSTED RESTRICTED STOCK UNIT AWARD AGREEMENT (the “Agreement”), effective as of [GRANT DATE], 2023 (the “Grant Date”), is entered into by and between the Company and [PARTICIPANT NAME] (the “Grantee”). 1. Definition

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 1, 2023 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An O

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 ☐ TRANSITION REPORT PU

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission Registrant; State of Incorporatio

Amendment to the Third Amended and Restated Code of Regulations

Exhibit 3.1 AMENDMENT TO THE FIRSTENERGY CORP. THIRD AMENDED AND RESTATED CODE OF REGULATIONS Effective May 24, 2023 The following amendment to Regulation 3 of the Third Amended and Restated Code of Regulations was approved by FirstEnergy Corp.’s shareholders at its 2023 Annual Meeting of Shareholders: 3. Special Meetings. Special meetings of shareholders may be called by the Chair or the Presiden

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 11-K For Annual Reports of Employee Stock Purchase, Savings and Similar Plans Pursuant to Section 15(d) of the Securities Exchange Act of 1934 (Mark One) {X} ANNUAL REPORT P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 11-K For Annual Reports of Employee Stock Purchase, Savings and Similar Plans Pursuant to Section 15(d) of the Securities Exchange Act of 1934 (Mark One) {X} ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 OR { } TRANSITION REPORT PURSUANT TO SECTI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 24, 2023 Commission Registra

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 24, 2023 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An Ohi

FirstEnergy Holds 2023 Annual Meeting Board Chair, Interim President and CEO John W. Somerhalder addresses shareholders Company announces preliminary voting results Brian X. Tierney appointed to Board of Directors

Exhibit 99.1 FirstEnergy Corp. For Release: May 24, 2023 76 South Main Street Akron, Ohio 44308 www.firstenergycorp.com News Media Contact: Investor Contact: Tricia Ingraham Irene Prezelj (330) 384-5247 (330) 384-3859 FirstEnergy Holds 2023 Annual Meeting Board Chair, Interim President and CEO John W. Somerhalder addresses shareholders Company announces preliminary voting results Brian X. Tierney

Indenture, dated as of May 4, 2023, between FirstEnergy Corp. and The Bank of New York Mellon Trust Company, N.A., as trustee. (incorporated by reference to FirstEnergy’s Form 8-K filed May 4, 2023, Exhibit 4.1, File No. 333-21011)

Exhibit 4.1 FIRSTENERGY CORP. AND THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., as Trustee INDENTURE Dated as of May 4, 2023 4.00% Convertible Senior Notes due 2026 TABLE OF CONTENTS ARTICLE 1 DEFINITIONS Section 1.01. Definitions 1 Section 1.02. References to Interest 12 ARTICLE 2 ISSUE, DESCRIPTION, EXECUTION, REGISTRATION AND EXCHANGE OF NOTES Section 2.01. Designation and Amount 13 Section

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 4, 2023 Commission Registran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 4, 2023 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An Ohio

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ C

DEFA14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

Notice Of Exempt Solicitation: (VOLUNTARY SUBMISSION)

Notice Of Exempt Solicitation: (VOLUNTARY SUBMISSION) NAME OF REGISTRANT: FirstEnergy Corp NAME OF PERSON RELYING ON EXEMPTION: Majority Action ADDRESS OF PERSON RELYING ON EXEMPTION: PO Box 4831, Silver Spring, MD 20914 Written materials are submitted pursuant to Rule 14a-6(g)(1) promulgated under the Securities Exchange Act of 1934.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 1, 2023 Commission Registran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 1, 2023 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An Ohio

Amendment No. 1 to Credit Agreement, dated as of April 27, 2023, by and among Monongahela Power Company, The Potomac Edison Company, the banks and other financial institutions party thereto on the date hereof, as lenders, and Mizuho Bank, Ltd, as administrative agent. (incorporated by reference to FirstEnergy’s Form 8-K filed May 1, 2023, Exhibit 10.6, File No. 333-21011)

Exhibit 10.6 EXECUTION VERSION AMENDMENT NO. 1 TO CREDIT AGREEMENT dated as of April 27, 2023 among MONONGAHELA POWER COMPANY, and THE POTOMAC EDISON COMPANY, as Borrowers, THE LENDERS NAMED HEREIN, as Lenders, MIZUHO BANK, LTD., as Administrative Agent, and THE FRONTING BANKS NAMED HEREIN, as Fronting Banks JPMORGAN CHASE BANK, N.A. PNC CAPITAL MARKETS LLC MUFG BANK, LTD. BARCLAYS BANK PLC BofA S

Amendment No. 1 to Credit Agreement, dated as of April 27, 2023, by and among Jersey Central Power & Light Company, the banks and other financial institutions party thereto on the date hereof, as lenders, and Mizuho Bank, Ltd., as administrative agent. (incorporated by reference to FirstEnergy’s Form 8-K filed May 1, 2023, Exhibit 10.5, File No. 333-21011)

Exhibit 10.5 EXECUTION VERSION AMENDMENT NO. 1 TO CREDIT AGREEMENT dated as of April 27, 2023 among JERSEY CENTRAL POWER & LIGHT COMPANY, as Borrower, THE LENDERS NAMED HEREIN, as Lenders, MIZUHO BANK, LTD., as Administrative Agent, and THE FRONTING BANKS NAMED HEREIN, as Fronting Banks JPMORGAN CHASE BANK, N.A. PNC CAPITAL MARKETS LLC MUFG BANK, LTD. BARCLAYS BANK PLC BofA SECURITIES, INC. MIZUHO

Amendment No. 1 and Consent and Limited Waiver to Credit Agreement, dated as of April 27, 2023, by and among Metropolitan Edison Company, Pennsylvania Power Company, Pennsylvania Electric Company, West Penn Power Company, the banks and other financial institutions party thereto on the date hereof, as lenders, and Mizuho Bank, Ltd., as administrative agent. (incorporated by reference to FirstEnergy’s Form 8-K filed May 1, 2023, Exhibit 10.3, File No. 333-21011)

Exhibit 10.3 EXECUTION VERSION AMENDMENT NO. 1 AND CONSENT AND LIMITED WAIVER TO CREDIT AGREEMENT dated as of April 27, 2023 among METROPOLITAN EDISON COMPANY, PENNSYLVANIA POWER COMPANY, PENNSYLVANIA ELECTRIC COMPANY and WEST PENN POWER COMPANY, as Borrowers, THE LENDERS NAMED HEREIN, as Lenders, MIZUHO BANK, LTD. as Administrative Agent, and THE FRONTING BANKS NAMED HEREIN, as Fronting Banks JPM

FirstEnergy Announces Proposed Offering of $1.0 Billion of Convertible Senior Notes Due 2026

Exhibit 99.1 FirstEnergy Corp. For Release: May 1, 2023 76 South Main Street Akron, Ohio 44308 www.firstenergycorp.com News Media Contact: Investor Contact: Tricia Ingraham Irene Prezelj (330) 384-5247 (330) 384-3859 FirstEnergy Announces Proposed Offering of $1.0 Billion of Convertible Senior Notes Due 2026 AKRON, Ohio, May 1, 2023 – FirstEnergy Corp. (NYSE: FE) (“FirstEnergy”) announced today th

Amendment No. 1 and Consent and Limited Waiver to Credit Agreement, dated as of April 27, 2023, by and among The Cleveland Electric Illuminating Company, Ohio Edison Company, The Toledo Edison Company, the banks and other financial institutions party thereto, as lenders, and JPMorgan Chase Bank, N.A., as administrative agent. (incorporated by reference to FirstEnergy’s Form 8-K filed May 1, 2023, Exhibit 10.2, File No. 333-21011)

Exhibit 10.2 EXECUTION VERSION AMENDMENT NO. 1 AND CONSENT AND LIMITED WAIVER TO CREDIT AGREEMENT dated as of April 27, 2023 among THE CLEVELAND ELECTRIC ILLUMINATING COMPANY, OHIO EDISON COMPANY, and THE TOLEDO EDISON COMPANY, as Borrowers, THE LENDERS NAMED HEREIN, as Lenders, JPMORGAN CHASE BANK, N.A., as Administrative Agent, and THE FRONTING BANKS NAMED HEREIN, as Fronting Banks JPMORGAN CHAS

Amendment No. 1 and Consent and Limited Waiver to Credit Agreement, dated as of April 27, 2023, by and among American Transmission Systems, Incorporated, Mid-Atlantic Interstate Transmission, LLC, Trans-Allegheny Interstate Line Company, the banks and other financial institutions party thereto on the date hereof, as lenders, and PNC Bank, National Association, as administrative agent. (incorporated by reference to FirstEnergy’s Form 8-K filed May 1, 2023, Exhibit 10.4, File No. 333-21011)

Exhibit 10.4 EXECUTION VERSION AMENDMENT NO. 1 AND CONSENT AND LIMITED WAIVER TO CREDIT AGREEMENT dated as of April 27, 2023 among AMERICAN TRANSMISSION SYSTEMS, INCORPORATED, MID-ATLANTIC INTERSTATE TRANSMISSION, LLC, and TRANS-ALLEGHENY INTERSTATE LINE COMPANY, as Borrowers, THE LENDERS NAMED HEREIN, as Lenders, PNC BANK, NATIONAL ASSOCIATION, as Administrative Agent, and THE FRONTING BANKS NAME

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 27, 2023 Commission Regist

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 27, 2023 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An O

Amendment No. 1 and Consent and Limited Waiver to Credit Agreement, dated as of April 27, 2023, by and among FirstEnergy Corp., FirstEnergy Transmission, LLC, the banks and other financial institutions party thereto, as lenders, and JPMorgan Chase Bank, N.A., as administrative agent. (incorporated by reference to FirstEnergy’s Form 8-K filed May 1, 2023, Exhibit 10.1, File No. 333-21011)

Exhibit 10.1 EXECUTION VERSION AMENDMENT NO. 1 AND CONSENT AND LIMITED WAIVER TO CREDIT AGREEMENT dated as of April 27, 2023 among FIRSTENERGY CORP., and FIRSTENERGY TRANSMISSION, LLC, as Borrowers, THE LENDERS NAMED HEREIN, as Lenders, JPMORGAN CHASE BANK, N.A., as Administrative Agent, and THE FRONTING BANKS NAMED HEREIN, as Fronting Banks JPMORGAN CHASE BANK, N.A. PNC CAPITAL MARKETS LLC MUFG B

FirstEnergy Announces First Quarter 2023 Financial Results Reports first quarter 2023 GAAP earnings of $0.51 per share and operating (non-GAAP) earnings of $0.60 per share Updates full-year GAAP forecast, affirms 2023 operating guidance and provides

Exhibit 99.1 FirstEnergy Corp. For Release: April 27, 2023 76 South Main Street Akron, Ohio 44308 www.firstenergycorp.com News Media Contact: Investor Contact: Tricia Ingraham Irene Prezelj (330) 384-5247 (330) 384-3859 FirstEnergy Announces First Quarter 2023 Financial Results Reports first quarter 2023 GAAP earnings of $0.51 per share and operating (non-GAAP) earnings of $0.60 per share Updates

Offer letter, dated March 26, 2023, between FirstEnergy Corp. and Brian X. Tierney (incorporated by reference to FE’s Form 10-Q filed April 27, 2023, Exhibit 10.2, File No. 333-21011).

Exhibit 10.2 March 26, 2023 Brian X. Tierney Dear Brian: We are pleased to offer you the position of President & Chief Executive Officer of FirstEnergy Corp. (FirstEnergy), reporting to the FirstEnergy Board of Directors, located at our Corporate Headquarters, 76 S. Main Street, Akron, Ohio 44308. Compensation and Benefits Your compensation package includes: •An annual salary of $1,500,000, which

Purchase and Sale Agreement, dated as of February 2, 2023, among the FirstEnergy Corp., and FirstEnergy Transmission, LLC, and North American Transmission Company II L.P., and North American Transmission FINCO L.P., Brookfield Super-Core Infrastructure Partners L.P., Brookfield Super-Core Infrastructure Partners (NUS) L.P. and Brookfield Super-Core Infrastructure Partners (ER) SCSp, as guarantors. (incorporated by reference to FE’s Form 10-Q filed April 27, 2023, Exhibit 10.1, File No. 333-21011).

Exhibit 10.1 EXECUTION VERSION CONFIDENTIAL PURCHASE AND SALE AGREEMENT dated as of February 2, 2023 by and among FIRSTENERGY CORP., FIRSTENERGY TRANSMISSION, LLC NORTH AMERICAN TRANSMISSION COMPANY II L.P., NORTH AMERICAN TRANSMISSION FINCO L.P., BROOKFIELD SUPER-CORE INFRASTRUCTURE PARTNERS L.P., BROOKFIELD SUPER-CORE INFRASTRUCTURE PARTNERS (NUS) L.P. and BROOKFIELD SUPER-CORE INFRASTRUCTURE PA

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 27, 2023 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An O

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 ☐ TRANSITION REPORT P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission Registrant; State of Incorporati

1Q 2023 Strategic & Financial Highlights John W. Somerhalder II, Interim President & CEO & Chair of the FE Board K. Jon Taylor, SVP & CFO Forward-Looking Statements 2 Forward-Looking Statements: This presentation includes forward-looking statements w

ex9921q23strategicandfi 1Q 2023 Strategic & Financial Highlights John W. Somerhalder II, Interim President & CEO & Chair of the FE Board K. Jon Taylor, SVP & CFO Forward-Looking Statements 2 Forward-Looking Statements: This presentation includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 based on information currently available to manageme

LETTER

United States securities and exchange commission logo April 13, 2023 K. Jon Taylor Chief Financial Officer FirstEnergy Corp. 76 South Main Street Akron, OH 44308 Re: FirstEnergy Corp. Form 10-K for the Fiscal Year ended December 31, 2022 Filed February 13, 2023 File No. 333-21011 Dear K. Jon Taylor: We have completed our review of your filing. We remind you that the company and its management are

April 5, 2023

April 5, 2023 Division of Corporation Finance Office of Energy & Transportation U.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ C

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e

FirstEnergy Names Brian X. Tierney President and Chief Executive Officer Tierney Brings Deep Industry, Operational and Financial Expertise to Advance FirstEnergy’s Strategy

Exhibit 99.1 FirstEnergy Corp. For Release: March 27, 2023 76 South Main Street Akron, Ohio 44308 www.firstenergycorp.com News Media Contact: Investor Contact: Jennifer Young Irene Prezelj (216) 337-8789 (330) 384-3859 [email protected] [email protected] FirstEnergy Names Brian X. Tierney President and Chief Executive Officer Tierney Brings Deep Industry, Operational and Financi

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 22, 2023 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An O

March 23, 2023

March 23, 2023 Division of Corporation Finance Office of Energy & Transportation U.

LETTER

United States securities and exchange commission logo March 10, 2023 K. Jon Taylor Chief Financial Officer FirstEnergy Corp. 76 South Main Street Akron, OH 44308 Re: FirstEnergy Corp. Form 10-K for the Fiscal Year ended December 31, 2022 Filed February 13, 2023 File No. 333-21011 Dear K. Jon Taylor: We have limited our review of your filing to the financial statements and related disclosures and h

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☒ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e

4Q 2022 Strategic & Financial Highlights John W. Somerhalder II, Interim President & CEO & Chair of the FE Board K. Jon Taylor, SVP & CFO Forward-Looking Statements 2 Forward-Looking Statements: This presentation includes forward-looking statements w

4Q 2022 Strategic & Financial Highlights John W. Somerhalder II, Interim President & CEO & Chair of the FE Board K. Jon Taylor, SVP & CFO Forward-Looking Statements 2 Forward-Looking Statements: This presentation includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 based on information currently available to management. Such statements are

2022 Interim Chief Executive Officer Restricted Stock Units Award Agreement to John W. Somerhalder II. (incorporated by reference to FE’s Form 10-K filed February 13, 2023, Exhibit 10.59, File No. 333-21011).

Exhibit 10-59 FIRSTENERGY CORP. 2020 Incentive Compensation Plan 2022 Interim Chief Executive Officer Restricted Stock Units Award Agreement THIS 2022 INTERIM CHIEF EXECUTIVE OFFICER RESTRICTED STOCK UNITS AWARD AGREEMENT (the “Agreement”), effective as of October 28, 2022 (the “Grant Date”), is entered into by and between the Company and Mr. John W. Somerhalder II (the “Grantee”). 1.Definitions.

List of Subsidiaries of the Registrant at December 31, 2022.

EXHIBIT 21 FIRSTENERGY CORP. LIST OF SUBSIDIARIES OF THE REGISTRANT AT DECEMBER 31, 2022 FirstEnergy Service Company - Incorporated in Ohio FirstEnergy Transmission, LLC - Organized in Delaware FirstEnergy Ventures Corp. - Incorporated in Ohio Jersey Central Power & Light Company - Incorporated in New Jersey Metropolitan Edison Company - Incorporated in Pennsylvania Monongahela Power Company - Inc

2023 Interim Chief Executive Officer Restricted Stock Units Award Agreement to John W. Somerhalder II.

Exhibit 10-60 FIRSTENERGY CORP. 2020 Incentive Compensation Plan January 2023 Interim Chief Executive Officer Restricted Stock Units Award Agreement THIS JANUARY 2023 INTERIM CHIEF EXECUTIVE OFFICER RESTRICTED STOCK UNITS AWARD AGREEMENT (the “Agreement”), effective as of January 4, 2023 (the “Grant Date”), is entered into by and between the Company and Mr. John W. Somerhalder II (the “Grantee”).

FirstEnergy Announces Fourth Quarter and Full Year 2022 Financial Results Reports full year 2022 GAAP earnings of $0.71 per share and operating (non-GAAP) earnings of $2.41 per share, above midpoint of guidance range Provides 2023 earnings guidance o

Exhibit 99.1 FirstEnergy Corp. For Release: February 13, 2023 76 South Main Street Akron, Ohio 44308 www.firstenergycorp.com News Media Contact: Investor Contact: Tricia Ingraham Irene Prezelj (330) 384-5247 (330) 384-3859 FirstEnergy Announces Fourth Quarter and Full Year 2022 Financial Results Reports full year 2022 GAAP earnings of $0.71 per share and operating (non-GAAP) earnings of $2.41 per

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 13, 2023 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☑ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the FISCAL YEAR ended December 31, 2022 ☐ TRANSITION REPORT PURSUA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☑ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the FISCAL YEAR ended December 31, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission Registrant; State of Incorporation; I

FE / FirstEnergy Corp. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 9)* Name of issuer: FirstEnergy Corp. Title of Class of Securities: Common Stock CUSIP Number: 337932107 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ R

FE / FirstEnergy Corp. / STATE STREET CORP Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 AMENDED FILING FIRSTENERGY CORP (NAME OF ISSUER) COMMON STOCK (TITLE OF CLASS OF SECURITIES) 337932107 (CUSIP NUMBER) 12/31/2022 (DATE OF EVENT WHICH REQUIRES FILING OF THIS STATEMENT) CHECK THE APPROPRIATE BOX TO DESIGNATE THE RULE PURSUANT TO WHICH THIS SCHEDULE IS FILED

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 2, 2023 Commission Regi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 2, 2023 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An

FET 30% Ownership Interest Transaction $3.5B Equity capital raise to further enhance financial position and support sustainable, long-term growth February 2, 2023 $3.5B FET 30% Ownership Interest Sale: Transaction Overview ■ Highly attractive and eff

exhibit992-investorprese FET 30% Ownership Interest Transaction $3.5B Equity capital raise to further enhance financial position and support sustainable, long-term growth February 2, 2023 $3.5B FET 30% Ownership Interest Sale: Transaction Overview ■ Highly attractive and efficient equity financing, reflecting strong long-term growth-oriented business – Expanded partnership with Brookfield, one of

FirstEnergy Announces $3.5 Billion Equity Capital Agreement to Further Enhance Financial Position and Support Sustainable, Long-Term Growth Brookfield Super-Core Infrastructure Partners to acquire additional 30% ownership interest in FirstEnergy Tran

Exhibit 99.1 FirstEnergy Corp. For Release: February 2, 2023 76 South Main Street Akron, Ohio 44308 www.firstenergycorp.com News Media Contact: Investor Relations Contact: Tricia Ingraham Irene Prezelj (330) 384-5247 (330) 384-3859 FirstEnergy Announces $3.5 Billion Equity Capital Agreement to Further Enhance Financial Position and Support Sustainable, Long-Term Growth Brookfield Super-Core Infras

FE / FirstEnergy Corp. / BlackRock Inc. Passive Investment

SC 13G/A 1 us3379321074012523.txt us3379321074012523.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 14) FIRSTENERGY CORP - (Name of Issuer) Common Stock - (Title of Class of Securities) 337932107 - (CUSIP Number) December 31, 2022 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box

MX:FCFS1 / FirstCash Holdings Inc / BlackRock Inc. Passive Investment

SC 13G 1 us33768g1076012423.txt us33768g1076012423.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: ) FirstCash Holdings, Inc. - (Name of Issuer) Common Stock - (Title of Class of Securities) 33768G107 - (CUSIP Number) December 31, 2022 - (Date of Event Which Requires Filing of this Statement) Check the appropriate

FE / FirstEnergy Corp. / GIC Private Ltd - SC 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No.) * FirstEnergy Corp (Name of Issuer) Common Stock, $0.10 par value (Title of Class of Securities) 337932107 (CUSIP Number) January 10, 2023 (Date of the Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant t

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 17, 2023 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 ☐ TRANSITION REPO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission Registrant; State of Incorpo

Focused on Our Future 3Q 2022 Strategic & Financial Highlights John Somerhalder II, Interim President & CEO K. Jon Taylor, SVP & CFO Forward-Looking Statements Forward-Looking Statements: This presentation includes forward-looking statements within t

Focused on Our Future 3Q 2022 Strategic & Financial Highlights John Somerhalder II, Interim President & CEO K.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 25, 2022 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An

FirstEnergy Announces Third Quarter 2022 Financial Results Reports third quarter 2022 GAAP earnings of $0.58 per share and operating (non-GAAP) earnings of $0.79 per share, at top end of guidance range Updates full-year GAAP guidance; affirms 2022 op

Exhibit 99.1 FirstEnergy Corp. For Release: October 25, 2022 76 South Main Street Akron, Ohio 44308 www.firstenergycorp.com News Media Contact: Investor Contact: Tricia Ingraham Irene Prezelj (330) 384-5247 (330) 384-3859 FirstEnergy Announces Third Quarter 2022 Financial Results Reports third quarter 2022 GAAP earnings of $0.58 per share and operating (non-GAAP) earnings of $0.79 per share, at to

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 15, 2022 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (

FirstEnergy Announces CEO Transition President and Chief Executive Officer Steven E. Strah to Retire John W. Somerhalder Appointed Interim President and Chief Executive Officer Board to Initiate Search for Permanent Successor

Exhibit 99.1 FirstEnergy Corp. For Release: September 15, 2022 76 South Main Street Akron, Ohio 44308 www.firstenergycorp.com News Media Contact: Investor Contact: Jennifer Young Irene Prezelj (216) 337-8789 (330) 384-3859 FirstEnergy Announces CEO Transition President and Chief Executive Officer Steven E. Strah to Retire John W. Somerhalder Appointed Interim President and Chief Executive Officer

-1- IN THE UNITED STATES DISTRICT COURT FOR THE SOUTHERN DISTRICT OF OHIO EASTERN DIVISION EMPLOYEES RETIREMENT SYSTEM : OF THE CITY OF ST. LOUIS, et al., : : Plaintiffs, : Case No. 2:20-cv-4813 : v. : Chief Judge Algenon L. Marbley : : Magistrate Ju

-1- IN THE UNITED STATES DISTRICT COURT FOR THE SOUTHERN DISTRICT OF OHIO EASTERN DIVISION EMPLOYEES RETIREMENT SYSTEM : OF THE CITY OF ST.

1- UNITED STATES DISTRICT COURT SOUTHERN DISTRICT OF OHIO EASTERN DIVISION Case No. 2:20-cv-04813 Chief Judge Algenon L. Marbley Magistrate Judge Kimberly A. Jolson FINAL JUDGMENT APPROVING SETTLEMENT AND ORDER OF DISMISSAL WHEREAS, a stockholder der

1- UNITED STATES DISTRICT COURT SOUTHERN DISTRICT OF OHIO EASTERN DIVISION Case No.

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 23, 2022 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An

Power of Attorney.

Exhibit 24-1 FIRSTENERGY CORP. REGISTRATION STATEMENT ON FORM S-8 POWER OF ATTORNEY KNOW ALL PERSONS BY THESE PRESENTS, that each of the undersigned officers and directors of FirstEnergy Corp., an Ohio corporation (the ?Registrant?), hereby constitutes and appoints Steven E. Strah, K. Jon Taylor, Hyun Park, and Mary M. Swann or any of them, each acting alone, as the true and lawful attorney-in-fac

Amendment No. 5 to FirstEnergy Corp. Savings Plan, executed as of December 8, 2020

Exhibit 4-4(f) AMENDMENT NO. 5 TO THE FIRSTENERGY CORP. SAVINGS PLAN AMENDED AND RESTATED AS OF JANUARY 1, 2017 This Amendment No. 5 to the FIRSTENERGY CORP. SAVINGS PLAN is made on the 8th day of December, 2020, by FirstEnergy Corp. (hereinafter referred to as the ?Company?). WITNESSETH: WHEREAS, the Company sponsors the FirstEnergy Corp. Savings Plan (hereinafter referred to as the ?Plan?); and

Filing Fee Table.

EX-FILING FEES Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) FirstEnergy Corp.

Amendment No. 4 to FirstEnergy Corp. Savings Plan, executed as of December 23, 2019

Exhibit 4-4(e) AMENDMENT NO. 4 TO THE FIRSTENERGY CORP. SAVINGS PLAN AMENDED AND RESTATED AS OF JANUARY 1, 2017 This Amendment No. 4 to the FIRSTENERGY CORP. SAVINGS PLAN is made on the 23rd day of December, 2019, by FirstEnergy Corp. (hereinafter referred to as the ?Company?). WITNESSETH: WHEREAS, the Company sponsors the FirstEnergy Corp. Savings Plan (hereinafter referred to as the ?Plan?); and

As filed with the Securities and Exchange Commission on August 12, 2022.

As filed with the Securities and Exchange Commission on August 12, 2022. Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 FIRSTENERGY CORP. (Exact name of registrant as specified in its charter) Ohio 34-1843785 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 26, 2022 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An Oh

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022 ☐ TRANSITION REPORT PU

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission Registrant; State of Incorporatio

Stock-Based Performance-Adjusted Restricted Stock Unit Award Agreement to John W. Somerhalder II (incorporated by reference to FE’s Form 10-Q filed July 26, 2022, Exhibit 10.2, File No. 333-21011).

Exhibit 10.2 FIRSTENERGY CORP. 2022 Performance-Adjusted Restricted Stock Unit Award Agreement THIS 2022 PERFORMANCE-ADJUSTED RESTRICTED STOCK UNIT AWARD AGREEMENT (the ?Agreement?), effective as of May 17, 2022 (the ?Grant Date?), is entered into by and between the Company and Mr. John W. Somerhalder II (the ?Grantee?). 1.Definitions. Unless otherwise specified in this Agreement, capitalized term

Focused on Our Future 2Q 2022 Strategic & Financial Highlights Steven E. Strah, President and CEO K. Jon Taylor, SVP, CFO & Strategy Forward-Looking Statements Forward-Looking Statements: This presentation includes forward-looking statements within t

Focused on Our Future 2Q 2022 Strategic & Financial Highlights Steven E. Strah, President and CEO K. Jon Taylor, SVP, CFO & Strategy Forward-Looking Statements Forward-Looking Statements: This presentation includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 based on information currently available to management. Such statements are subject

FirstEnergy Announces Second Quarter 2022 Financial Results Reports second quarter 2022 GAAP earnings of $0.33 per share and operating (non-GAAP) earnings of $0.53 per share, in top end of guidance range Closed on minority sale of FET LLC, raising $2

Exhibit 99.1 FirstEnergy Corp. For Release: July 26, 2022 76 South Main Street Akron, Ohio 44308 www.firstenergycorp.com News Media Contact: Investor Contact: Tricia Ingraham Irene Prezelj (330) 384-5247 (330) 384-3859 FirstEnergy Announces Second Quarter 2022 Financial Results Reports second quarter 2022 GAAP earnings of $0.33 per share and operating (non-GAAP) earnings of $0.53 per share, in top

Form 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 11-K For Annual Reports of Employee Stock Purchase, Savings and Similar Plans Pursuant to Section 15(d) of the Securities Exchange Act of 1934 (Mark One) {X} ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021 OR { } TRANSITION REPORT PURSUANT TO SECTI

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 15, 2022 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An Oh

JOINT FILING AGREEMENT

Exhibit 1 JOINT FILING AGREEMENT Pursuant to and in accordance with the Securities Exchange Act of 1934, as amended, and the rules and regulations thereunder (the ?Exchange Act?), the undersigned hereby agree to the joint filing on behalf of each of them of any filing required by such party under Section 13 of the Exchange Act or any rule or regulation thereunder (including any amendment, restatement, supplement, and/or exhibit thereto) with respect to securities of FirstEnergy Corp.

FE / FirstEnergy Corp. / Blackstone Holdings III L.P. - SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 2)* FirstEnergy Corp. (Name of Issuer) Common Stock, par value $0.10 (Title of Class of Securities) 337932107 (CUSIP Number) John G. Finley Blackstone Inc. 345 Park Avenue New York, New York 10154 Tel: (212) 583-5000 (Name, Address and Telephone Number of Pe

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 9, 2022 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An Ohi

FirstEnergy Amends Price and Timing of Cash Tender Offer and Announces Satisfaction of Financing Condition

Exhibit 99.1 FirstEnergy Corp. For Release: June 9, 2022 76 South Main Street Akron, Ohio 44308 www.firstenergycorp.com News Media Contact: Investor Contact: Tricia Ingraham Irene Prezelj (330) 384-5247 (330) 384-3859 FirstEnergy Amends Price and Timing of Cash Tender Offer and Announces Satisfaction of Financing Condition Akron, Ohio ? FirstEnergy Corp. (NYSE: FE) announced today that it has amen

Amended and Restated Limited Liability Company Operating Agreement of FirstEnergy Transmission, LLC (incorporated by reference to FE’s Form 8-K filed May 31, 2022, Exhibit 10.1, File No. 333-21011).

Exhibit 10.1 EXECUTION VERSION FORM OF THIRD AMENDED AND RESTATED LIMITED LIABILITY COMPANY AGREEMENT OF FIRSTENERGY TRANSMISSION, LLC TABLE OF CONTENTS Page ARTICLE I General Matters 1 Section 1.1 Formation 1 Section 1.2 Name 1 Section 1.3 Purpose 1 Section 1.4 Registered Office 2 Section 1.5 Registered Agent 2 Section 1.6 Members 2 Section 1.7 Powers 3 Section 1.8 Limited Liability Company Agree

FirstEnergy Completes Minority Interest Sale in Transmission Business Investment by Brookfield Super-Core Infrastructure Partners Supports FirstEnergy’s Capital Growth Program, Strengthens Balance Sheet

Exhibit 99.1 FirstEnergy Corp. For Release: May 31, 2022 76 South Main Street Akron, Ohio 44308 www.firstenergycorp.com News Media Contact: Investor Contact: Tricia Ingraham Irene Prezelj (330) 384-5247 (330) 384-3859 FirstEnergy Completes Minority Interest Sale in Transmission Business Investment by Brookfield Super-Core Infrastructure Partners Supports FirstEnergy?s Capital Growth Program, Stren

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 31, 2022 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An Ohi

FirstEnergy Commences Cash Tender Offer for up to $800 Million Aggregate Purchase Price of Certain of Its Outstanding Notes

EX-99.1 2 ex991-pressreleasexfecorpn.htm EX-99.1 Exhibit 99.1 FirstEnergy Corp. For Release: May 25, 2022 76 South Main Street Akron, Ohio 44308 www.firstenergycorp.com News Media Contact: Investor Contact: Tricia Ingraham Irene Prezelj (330) 384-5247 (330) 384-3859 FirstEnergy Commences Cash Tender Offer for up to $800 Million Aggregate Purchase Price of Certain of Its Outstanding Notes Akron, Oh

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 25, 2022 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An Ohi

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 17, 2022 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An Ohi

Third Amended and Restated Code of Regulations of FirstEnergy Corp., effective May 17, 2022 (incorporated by reference to FE’s Form 8-K on May 23, 2022, Exhibit 3.1, File No. 333-21011).

Exhibit 3.1 FirstEnergy Corp. THIRD AMENDED AND RESTATED CODE OF REGULATIONS Effective May 17, 2022 SHAREHOLDER MEETINGS 1.Time and Place of Meetings. All meetings of the shareholders for the election of directors or for any other purpose will be held at such time and place, within or without the State of Ohio, as may be designated by the Board of Directors or, in the absence of a designation by t

FE / FirstEnergy Corp. / Blackstone Holdings III L.P. - SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 1)* FirstEnergy Corp. (Name of Issuer) Common Stock, par value $0.10 (Title of Class of Securities) 337932107 (CUSIP Number) John G. Finley Blackstone Inc. 345 Park Avenue New York, New York 10154 Tel: (212) 583-5000 (Name, Address and Telephone Number of Pe

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 17, 2022 Commission Registrant; State of Incorporation; I.R.S. Employer File Number Address; and Telephone Number Identification No. 333-21011 FIRSTENERGY CORP 34-1843785 (An Ohi

FirstEnergy Holds Annual Meeting, Announces New Board Leadership President and CEO Steven E. Strah addresses shareholders John W. Somerhalder elected Board chair Lisa Winston Hicks elected lead independent director

Exhibit 99.1 FirstEnergy Corp. For Release: May 17, 2022 76 South Main Street Akron, Ohio 44308 www.firstenergycorp.com News Media Contact: Investor Contact: Tricia Ingraham Irene Prezelj (330) 384-5247 (330) 384-3859 FirstEnergy Holds Annual Meeting, Announces New Board Leadership President and CEO Steven E. Strah addresses shareholders John W. Somerhalder elected Board chair Lisa Winston Hicks e

UNITED STATES DISTRICT COURT SOUTHERN DISTRICT OF OHIO EASTERN DIVISION EMPLOYEES RETIREMENT SYSTEM OF THE CITY OF ST. LOUIS, et al., Plaintiffs, v. CHARLES E. JONES, et al., Defendants, and FIRSTENERGY CORP., Nominal Defendant. Case No. 2:20-cv-0481

EX-99.1 2 exhibit991-stipulationof.htm EX-99.1 UNITED STATES DISTRICT COURT SOUTHERN DISTRICT OF OHIO EASTERN DIVISION EMPLOYEES RETIREMENT SYSTEM OF THE CITY OF ST. LOUIS, et al., Plaintiffs, v. CHARLES E. JONES, et al., Defendants, and FIRSTENERGY CORP., Nominal Defendant. Case No. 2:20-cv-04813 Chief Judge Algenon L. Marbley Magistrate Judge Kimberly A. Jolson STIPULATION AND AGREEMENT OF SETTL

UNITED STATES DISTRICT COURT SOUTHERN DISTRICT OF OHIO EASTERN DIVISION

Exhibit 99.2 UNITED STATES DISTRICT COURT SOUTHERN DISTRICT OF OHIO EASTERN DIVISION EMPLOYEES RETIREMENT SYSTEM OF THE CITY OF ST. LOUIS, et al., Case No. 2:20-cv-04813 Plaintiffs, Chief Judge Algenon L. Marbley v. Magistrate Judge Kimberly A. Jolson CHARLES E. JONES, et al., Defendants, and FIRSTENERGY CORP., Nominal Defendant. NOTICE OF (I) PENDENCY AND PROPOSED SETTLEMENT OF STOCKHOLDER DERIVA