NRGV / Energy Vault Holdings, Inc. - SEC-Einreichungen, Jahresbericht, Proxy Statement

Energy Vault Holdings, Inc.
US ˙ NYSE ˙ US29280W1099

Basisstatistiken
LEI 549300KMBUKUUIQ6FN34
CIK 1828536
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Energy Vault Holdings, Inc.
SEC Filings (Chronological Order)
Auf dieser Seite finden Sie eine vollständige, chronologische Liste der SEC-Einreichungen, mit Ausnahme der Eigentumseinreichungen, die wir an anderer Stelle bereitstellen.
June 1, 2026 8-K

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 29, 2026 Energy Vault Holding

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 29, 2026 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commissio

May 19, 2026 EX-10.15

Confidential - For Official Use Only Confidential - For Official Use Only - PROPRIETARY INFORMATION OF ENERGY VAULT HOLDINGS, INC. EXHIBIT 10.15 SECURITIES PURCHASE AGREEMENT THIS SECURITIES PURCHASE AGREEMENT (this “Agreement”), dated as of May 18,

nrgv10-qex1015 Confidential - For Official Use Only Confidential - For Official Use Only - PROPRIETARY INFORMATION OF ENERGY VAULT HOLDINGS, INC.

May 19, 2026 EX-10.12

Energy Vault Holdings, Inc. Compensation Program for Non-Executive Directors (as amended and restated, effective July 30, 2025)

Exhibit 10.12 Energy Vault Holdings, Inc. Compensation Program for Non-Executive Directors (as amended and restated, effective July 30, 2025) Non-employee members of the Board of Directors (“Board”) of Energy Vault Holdings, Inc. (the “Company”) shall receive cash and equity compensation as set forth in this Non-Executive Director Compensation Program (this “Program”). The cash and equity compensa

May 19, 2026 EX-4.1

ENERGY VAULT HOLDINGS, INC. AR Convertible Debenture

Exhibit 4.1 NEITHER THIS DEBENTURE NOR THE SECURITIES INTO WHICH THIS DEBENTURE IS CONVERTIBLE HAVE BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION OR THE SECURITIES COMMISSION OF ANY STATE. THESE SECURITIES HAVE BEEN SOLD IN RELIANCE UPON AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXC

May 19, 2026 EX-4.2

ENERGY VAULT HOLDINGS, INC. LC Convertible Debenture

Exhibit 4.2 NEITHER THIS DEBENTURE NOR THE SECURITIES INTO WHICH THIS DEBENTURE IS CONVERTIBLE HAVE BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION OR THE SECURITIES COMMISSION OF ANY STATE. THESE SECURITIES HAVE BEEN SOLD IN RELIANCE UPON AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXC

May 19, 2026 EX-10.14

Energy Vault SA

Exhibit 10.14 Energy Vault SA Via Cantonale 19 Lugano 6900 SWITZERLAND Robert Piconi [***] 16 December 2025 2025 Retention Bonus Dear Rob, At Energy Vault, we realize that our people are our strength. We also realize that the best way to succeed in our competitive marketplace is to retain our best people. In this spirit, we are proud to offer you the opportunity to earn a Retention Bonus. The term

May 19, 2026 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x 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 o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 00

May 19, 2026 EX-10.13

Energy Vault SA

Exhibit 10.13 Energy Vault SA Via Cantonale 19 Lugano 6900 SWITZERLAND Robert Piconi [***] 10 September 2025 2025 Retention Bonus Dear Rob, At Energy Vault, we realize that our people are our strength. We also realize that the best way to succeed in our competitive marketplace is to retain our best people. In this spirit, we are proud to offer you the opportunity to earn a Retention Bonus. The ter

May 18, 2026 NT 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25 NOTIFICATION OF LATE FILING

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25 NOTIFICATION OF LATE FILING SEC File Number: 001-39982 CUSIP Number: 29280W109 (Check one): ☐ Form 10-K ☐ Form 20-F ☐ Form 11-K ☒ Form 10-Q ☐ Form 10-D ☐ Form N-SAR ☐ Form N-CSR For Period Ended: March 31, 2026 ☐ Transition Report on Form 10-K ☐ Transition Report on Form 20-F ☐ Transition Report on Form 11-K ☐ Tran

May 7, 2026 8-K

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 7, 2026 Energy Vault Holdings

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 7, 2026 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation or organizat

May 5, 2026 8-K

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 05, 2026 Energy Vault Holding

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 05, 2026 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commissio

May 5, 2026 EX-99.1

Energy Vault Reports First Quarter 2026 Financial Results and Reaffirms 2026 Guidance Q1 2026 global MW under management surged from 440 MW to 1.1 GW, up over 500% year-over-year and 140% sequentially Year to Date 2026 backlog reached $1.35 billion,

Exhibit 99.1 Energy Vault Reports First Quarter 2026 Financial Results and Reaffirms 2026 Guidance Q1 2026 global MW under management surged from 440 MW to 1.1 GW, up over 500% year-over-year and 140% sequentially Year to Date 2026 backlog reached $1.35 billion, up 108% year-over-year, of which 80%+ is recurring, high margin IPP revenue Q1 2026 Revenue of $21.9 million, up 156% year-over-year Q1 2

April 17, 2026 DEFA14A

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 x 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)) ¨ Def

April 17, 2026 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Check the appropriate box: Filed by the Registrant ☐ Filed by a Party other than the Registrant ☐ ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission only (as permitted by Ru

April 17, 2026 ARS

ARS

ANNUAL REPORT www.energyvault.com © 2026 Energy Vault, Inc. All Rights Reserved ENERGY VAULT HOLDINGS, INC.www.energyvault.com 2 Dear Shareholders, 2025 was a defining year for Energy Vault. We delivered strong financial performance, executed a significant strategic transformation and deliberately repositioned the company into new, high-value markets to support sustained, long-term growth. Most im

March 27, 2026 EX-FILING FEES

Table 1: Newly Registered Securities

Calculation of Filing Fee Tables S-8 Energy Vault Holdings, Inc. Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee 1 Equity Common Stock, $0.0001 par value per share Other 34,000,000 $ 3.42 $ 116,280,000.00 0.0001381 $ 16,058.27

March 27, 2026 S-8

As filed with the Securities and Exchange Commission on March 27, 2026

As filed with the Securities and Exchange Commission on March 27, 2026 Registration No.

March 18, 2026 EX-10.33

INDEMNITY AGREEMENT

Exhibit 10.33 INDEMNITY AGREEMENT THIS INDEMNITY AGREEMENT (this “Agreement”) is made as of , by and between ENERGY VAULT HOLDINGS, INC., a Delaware corporation (the “Company”), and , Director of the Company (“Indemnitee”). RECITALS WHEREAS, highly competent persons have become more reluctant to serve publicly-held corporations as directors, officers or in other capacities unless they are provided

March 18, 2026 EX-10.32

US-DOCS\137016642.2 ENERGY VAULT HOLDINGS, INC. 2025 EMPLOYMENT INDUCEMENT AWARD PLAN NOTICE OF RESTRICTED STOCK UNIT AWARD You have been granted Restricted Stock Units (“RSUs”), each representing the right to receive one share of the Common Stock of

a2025inducementplanrsugr US-DOCS\137016642.2 ENERGY VAULT HOLDINGS, INC. 2025 EMPLOYMENT INDUCEMENT AWARD PLAN NOTICE OF RESTRICTED STOCK UNIT AWARD You have been granted Restricted Stock Units (“RSUs”), each representing the right to receive one share of the Common Stock of Energy Vault Holdings, Inc. (the “Company”) on the following terms and conditions: Name of Recipient: «Name» Total Number of

March 18, 2026 EX-21.1

List of Subsidiaries

Exhibit 21.1 List of Subsidiaries Name of Subsidiary Country of Incorporation Percentage of Voting Securities Owned Energy Vault, Inc. United States (Delaware) 100% Calistoga Resiliency Center Holdco, LLC United States (Delaware) 100% Calistoga Resiliency Center, LLC United States (Delaware) 100% Cetus Energy LLC United States (Delaware) 100% Cetus Energy, Inc. United States (Delaware) 97% Cross T

March 18, 2026 EX-10.35

SCHEDULE OF DIRECTOR INDEMNIFICATION AGREEMENTS SUBSTANTIALLY IDENTICAL TO FORM OF DIRECTOR INDEMNIFICATION AGREEMENT FILED AS EXHIBIT TO ANNUAL REPORT

Exhibit 10.35 SCHEDULE OF DIRECTOR INDEMNIFICATION AGREEMENTS SUBSTANTIALLY IDENTICAL TO FORM OF DIRECTOR INDEMNIFICATION AGREEMENT FILED AS EXHIBIT TO ANNUAL REPORT In accordance with Instruction 2 to Item 601 of Regulation S-K, the Registrant has omitted filing the following Director Indemnification Agreements by and between Energy Vault Holdings, Inc. and the parties named below because they ar

March 18, 2026 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) x 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 o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-399

March 17, 2026 EX-99.1

Energy Vault Reports Q4 and Full Year 2025 Financial Results Q4 2025 contract revenue backlog soared to a record $1.3 billion, up 42% sequentially from Q3 2025 and up over 300% from the prior year 2025 Revenue of $203.7 million grew 340%+ compared to

Exhibit 99.1 Energy Vault Reports Q4 and Full Year 2025 Financial Results Q4 2025 contract revenue backlog soared to a record $1.3 billion, up 42% sequentially from Q3 2025 and up over 300% from the prior year 2025 Revenue of $203.7 million grew 340%+ compared to the prior year (within the original 2025 guidance range) 2025 GAAP gross profit reached $48.0 million up nearly 8x versus the prior year

March 17, 2026 8-K

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 17, 2026 Energy Vault Holdi

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 17, 2026 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commiss

February 27, 2026 8-K

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 25, 2026 Energy Vault Ho

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 25, 2026 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation or org

February 18, 2026 8-K

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 Energy Vault Ho

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 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation or org

February 18, 2026 EX-4.1

ENERGY VAULT HOLDINGS, INC. U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, as Trustee Dated as of February 17, 2026 5.250% Convertible Senior Notes due 2031 TABLE OF CONTENTS

Exhibit 4.1 Execution Version ENERGY VAULT HOLDINGS, INC. AND U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, as Trustee INDENTURE Dated as of February 17, 2026 5.250% Convertible Senior Notes due 2031 TABLE OF CONTENTS PAGE Article 1 DEFINITIONS 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

February 18, 2026 EX-10.1

[Signature Pages Follow]

Exhibit 10.1 [Bidding Version] [Dealer name and address] To: Energy Vault Holdings, Inc. 4165 East Thousand Oaks Blvd., Suite 100 Westlake Village, California 91362 Attention: Michael Beer From: [Dealer] Re: [Base][Additional] Capped Call Transaction Date: [], 2026 Dear Ladies and Gentlemen: The purpose of this communication (this “Confirmation”) is to set forth the terms and conditions of the abo

February 12, 2026 EX-99.1

Energy Vault Announces Upsize and Pricing of $140 Million Convertible Senior Notes Offering

Exhibit 99.1 Energy Vault Announces Upsize and Pricing of $140 Million Convertible Senior Notes Offering WESTLAKE VILLAGE, Calif., February 11, 2026 - Energy Vault Holdings, Inc. (NYSE: NRGV) (“Energy Vault”), a leader in sustainable, grid-scale energy storage solutions, today announced the pricing of $140.0 million aggregate principal amount of 5.250% convertible senior notes due 2031 (the “Notes

February 12, 2026 8-K

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 11, 2026 Energy Vault Ho

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 11, 2026 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation or org

February 11, 2026 8-K

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 11, 2026 Energy Vault Ho

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 11, 2026 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation or org

February 11, 2026 EX-99.1

Energy Vault Announces Unaudited Preliminary Estimates of Select Financial Information for Fourth Quarter and Year End 2025 Q4 2025 Revenue expected to be between $150.0 million and $155.0 million, representing year-over-year (“YoY”) improvement of ~

Exhibit 99.1 Energy Vault Announces Unaudited Preliminary Estimates of Select Financial Information for Fourth Quarter and Year End 2025 Q4 2025 Revenue expected to be between $150.0 million and $155.0 million, representing year-over-year (“YoY”) improvement of ~355%, and an increase of ~5x sequentially from Q3 2025 Q4 2025 GAAP Gross Profit expected to be between $28 million and $33 million, an i

January 16, 2026 424B3

ENERGY VAULT HOLDINGS, INC. Up to 33,251,333 shares of Common Stock Offered by the Selling Stockholder Issuable Upon Conversion of Obligations Under Convertible Debentures

TABLE OF CONTENTS  Filed Pursuant to Rule 424(b)(3)  Registration No.: 333-292650 PROSPECTUS ENERGY VAULT HOLDINGS, INC. Up to 33,251,333 shares of Common Stock Offered by the Selling Stockholder Issuable Upon Conversion of Obligations Under Convertible Debentures This prospectus relates to the resale or other disposition from time to time by YA II PN, Ltd. (the “Selling Stockholder”), of up to an

January 14, 2026 CORRESP

Energy Vault Holdings, Inc. 4165 East Thousand Oaks Blvd., Suite 100 Westlake Village, CA 91362 (805) 852-0000

Energy Vault Holdings, Inc. 4165 East Thousand Oaks Blvd., Suite 100 Westlake Village, CA 91362 (805) 852-0000 January 14, 2026 Via EDGAR United States Securities and Exchange Commission Division of Corporation Finance Office of Manufacturing 100 F Street, N.E. Washington, D.C. 20549-3561 Re: Request for Acceleration of Effectiveness of Registration Statement on Form S-3 (Registration No. 333-2926

January 13, 2026 LETTER

LETTER

January 13, 2026 Robert Piconi Chief Executive Officer Energy Vault Holdings, Inc.

January 9, 2026 S-3

As filed with the Securities and Exchange Commission on January 9, 2026

TABLE OF CONTENTS As filed with the Securities and Exchange Commission on January 9, 2026 Registration No.

January 9, 2026 EX-10.2

FIRST AMENDMENT TO SECURITIES PURCHASE AGREEMENT

Exhibit 10.2 Execution Version FIRST AMENDMENT TO SECURITIES PURCHASE AGREEMENT THIS FIRST AMENDMENT TO SECURITIES PURCHASE AGREEMENT (this “Amendment”), dated as of December 30, 2025, is between ENERGY VAULT HOLDINGS, INC., a company incorporated under the laws of the State of Delaware, with principal executive offices located at 4165 East Thousand Oaks Blvd., Suite 100, Westlake Village, CA, 913

January 9, 2026 EX-10.3

AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT

Exhibit 10.3 Execution Version AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT THIS AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT (this “Agreement”), dated as of December 30, 2025, is made by and between YA II PN, LTD., a Cayman Islands exempt limited company (the “Investor”), and ENERGY VAULT HOLDINGS, INC., a company incorporated under the laws of the State of Delaware (the “Company”). T

January 9, 2026 EX-4.2

ENERGY VAULT HOLDINGS, INC. Convertible Debenture

Exhibit 4.2 NEITHER THIS DEBENTURE NOR THE SECURITIES INTO WHICH THIS DEBENTURE IS CONVERTIBLE HAVE BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION OR THE SECURITIES COMMISSION OF ANY STATE. THESE SECURITIES HAVE BEEN SOLD IN RELIANCE UPON AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXC

January 9, 2026 EX-FILING FEES

Security Type

Calculation of Filing Fee Tables S-3 Energy Vault Holdings, Inc. 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

January 6, 2026 8-K

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 5, 2026 Energy Vault Hold

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 5, 2026 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commis

January 6, 2026 EX-99.1

Energy Vault Begins Construction of 150 MW SOSA Energy Center in Texas’ ERCOT Market in Q4 2025, Bringing Total Asset Vault Portfolio Under Operation & Construction to Over 340 MW While Growing Cash in the Quarter by ~65% to Over $100 Million Major m

Exhibit 99.1 Energy Vault Begins Construction of 150 MW SOSA Energy Center in Texas’ ERCOT Market in Q4 2025, Bringing Total Asset Vault Portfolio Under Operation & Construction to Over 340 MW While Growing Cash in the Quarter by ~65% to Over $100 Million Major milestone of fourth Asset Vault project now under construction, ‘safe harbored’ and FEOC compliant as part of broader investment program e

January 2, 2026 8-K

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 30, 2025 Energy Vault Ho

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 30, 2025 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Comm

December 31, 2025 EX-FILING FEES

Security Type

Calculation of Filing Fee Tables S-3 Energy Vault Holdings, Inc. 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

December 31, 2025 S-3

As filed with the Securities and Exchange Commission on December 31, 2025

TABLE OF CONTENTS As filed with the Securities and Exchange Commission on December 31, 2025 Registration No.

December 19, 2025 8-K

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 16, 2025 Energy Vault Ho

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 16, 2025 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Comm

December 16, 2025 424B3

ENERGY VAULT HOLDINGS, INC. Up to 33,251,333 shares of Common Stock Offered by the Selling Stockholder Issuable Upon Conversion of Obligations Under Convertible Debentures

TABLE OF CONTENTS  Filed Pursuant to Rule 424(b)(3)  Registration No. 333-292030 PROSPECTUS ENERGY VAULT HOLDINGS, INC. Up to 33,251,333 shares of Common Stock Offered by the Selling Stockholder Issuable Upon Conversion of Obligations Under Convertible Debentures This prospectus relates to the resale or other disposition from time to time by YA II PN, Ltd. (the “Selling Stockholder”), of up to an

December 15, 2025 CORRESP

Energy Vault Holdings, Inc. 4165 East Thousand Oaks Blvd., Suite 100 Westlake Village, CA 91362 (805) 852-0000

Energy Vault Holdings, Inc. 4165 East Thousand Oaks Blvd., Suite 100 Westlake Village, CA 91362 (805) 852-0000 December 15, 2025 Via EDGAR United States Securities and Exchange Commission Division of Corporation Finance Office of Manufacturing 100 F Street, N.E. Washington, D.C. 20549-3561 Re: Request for Acceleration of Effectiveness of Registration Statement on Form S-3 (Registration No. 333-292

December 10, 2025 S-3

As filed with the Securities and Exchange Commission on December 9, 2025

TABLE OF CONTENTS As filed with the Securities and Exchange Commission on December 9, 2025 Registration No.

December 10, 2025 EX-FILING FEES

Security Type

Calculation of Filing Fee Tables S-3 Energy Vault Holdings, Inc. 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

November 10, 2025 EX-4.5

FORM OF WARRANT TO PURCHASE COMMON STOCK For the Purchase of Up to 1,582,311 Shares of Common Stock ENERGY VAULT HOLDINGS, INC. Dated as of October 9, 2025

Exhibit 4.5 THIS WARRANT AND THE SECURITIES ISSUABLE UPON THE EXERCISE OF THIS WARRANT HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”). THIS WARRANT AND THE SECURITIES ISSUABLE UPON THE EXERCISE OF THIS WARRANT MAY NOT BE SOLD, OFFERED FOR SALE, PLEDGED OR HYPOTHECATED EXCEPT PURSUANT TO A REGISTRATION STATEMENT IN EFFECT UNDER THE SECURITIES ACT OR PUR

November 10, 2025 EX-4.2

ENERGY VAULT HOLDINGS, INC. Convertible Debenture

Exhibit 4.2 NEITHER THIS DEBENTURE NOR THE SECURITIES INTO WHICH THIS DEBENTURE IS CONVERTIBLE HAVE BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION OR THE SECURITIES COMMISSION OF ANY STATE. THESE SECURITIES HAVE BEEN SOLD IN RELIANCE UPON AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXC

November 10, 2025 8-K

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, 2025 Energy Vault Ho

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, 2025 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Comm

November 10, 2025 EX-10.11

CONTRIBUTION AND PURCHASE AGREEMENT AMONG ENERGY VAULT, INC., OIC STRUCTURED EQUITY FUND I, L.P., OIC STRUCTURED EQUITY FUND I AUS, L.P., OIC STRUCTURED EQUITY FUND I GPFA, L.P., AND ASSET VAULT, LLC TABLE OF CONTENTS

Exhibit 10.11 CONTRIBUTION AND PURCHASE AGREEMENT AMONG ENERGY VAULT, INC., OIC STRUCTURED EQUITY FUND I, L.P., OIC STRUCTURED EQUITY FUND I AUS, L.P., OIC STRUCTURED EQUITY FUND I GPFA, L.P., AND ASSET VAULT, LLC TABLE OF CONTENTS Page 1.1 Cash Contributions 1 1.2 EV Contribution 2 1.3 Closing Date 2 1.4 Use of Proceeds 5 1.5 Recapitalization Payments 5 1.6 Withholding 5 2. Representations and Wa

November 10, 2025 EX-10.6

CEDAR CEDAR ADVANCE LLC 5401 Collins Avenue CU-9A Miami Beach, FL 33140 [*] STANDARD MERCHANT CASH ADVANCE AGREEMENT

Exhibit 10.6 CEDAR CEDAR ADVANCE LLC 5401 Collins Avenue CU-9A Miami Beach, FL 33140 [*] STANDARD MERCHANT CASH ADVANCE AGREEMENT This is an Agreement dated 09/02/2025 by and between CEDAR ADVANCE LLC (“CEDAR”), inclusive of its successors and assigns, and each merchant listed below (“Merchant”). Merchant’s Legal Name: ENERGY VAULT INC / ENERGY VAULT HOLDINGS INC D/B/A/: ENERGY VAULT INC Fed ID #:

November 10, 2025 EX-10.9

TAX CREDIT PURCHASE AGREEMENT

Exhibit 10.9 TAX CREDIT PURCHASE AGREEMENT This Tax Credit Purchase Agreement (this “Agreement”) is made and entered into as of July 18, 2025 (the “Execution Date”), by and between Calistoga Resiliency Center, LLC, a Delaware limited liability company (“Seller”), Calistoga Resiliency Center HoldCo, LLC, a Delaware limited liability company (“Seller HoldCo”) and Vitol Inc., a Delaware corporation (

November 10, 2025 EX-4.1

FORM OF WARRANT TO PURCHASE COMMON STOCK For the Purchase of Up to 4,500,000 Shares of Common Stock ENERGY VAULT HOLDINGS, INC. Dated as of August 18, 2025

Exhibit 4.1 THIS WARRANT AND THE SECURITIES ISSUABLE UPON THE EXERCISE OF THIS WARRANT HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”). THIS WARRANT AND THE SECURITIES ISSUABLE UPON THE EXERCISE OF THIS WARRANT MAY NOT BE SOLD, OFFERED FOR SALE, PLEDGED OR HYPOTHECATED EXCEPT PURSUANT TO A REGISTRATION STATEMENT IN EFFECT UNDER THE SECURITIES ACT OR PUR

November 10, 2025 EX-4.3

FORM OF WARRANT TO PURCHASE COMMON STOCK For the Purchase of Up to 3,955,777 Shares of Common Stock ENERGY VAULT HOLDINGS, INC. Dated as of October 9, 2025

Exhibit 4.3 THIS WARRANT AND THE SECURITIES ISSUABLE UPON THE EXERCISE OF THIS WARRANT HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”). THIS WARRANT AND THE SECURITIES ISSUABLE UPON THE EXERCISE OF THIS WARRANT MAY NOT BE SOLD, OFFERED FOR SALE, PLEDGED OR HYPOTHECATED EXCEPT PURSUANT TO A REGISTRATION STATEMENT IN EFFECT UNDER THE SECURITIES ACT OR PUR

November 10, 2025 EX-26.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO RULES 13a-14(a) AND 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES OXLEY ACT of 2002

Exhibit 31.1 CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO RULES 13a-14(a) AND 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES OXLEY ACT of 2002 I, Robert Piconi, certify that: 1. I have reviewed this quarterly report on Form 10-Q of Energy Vault Holdings, Inc.; 2. Based on my knowledge, this report does not contain any untrue statemen

November 10, 2025 EX-4.4

FORM OF WARRANT TO PURCHASE COMMON STOCK For the Purchase of Up to 34,020 Shares of Common Stock ENERGY VAULT HOLDINGS, INC. Dated as of October 9, 2025

Exhibit 4.4 THIS WARRANT AND THE SECURITIES ISSUABLE UPON THE EXERCISE OF THIS WARRANT HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”). THIS WARRANT AND THE SECURITIES ISSUABLE UPON THE EXERCISE OF THIS WARRANT MAY NOT BE SOLD, OFFERED FOR SALE, PLEDGED OR HYPOTHECATED EXCEPT PURSUANT TO A REGISTRATION STATEMENT IN EFFECT UNDER THE SECURITIES ACT OR PUR

November 10, 2025 EX-99.1

Energy Vault Reports Third Quarter 2025 Financial Results Contract revenue backlog of $920 million, up 112% year-to-date Q3 2025 Revenue of $33.3 million improved 27x versus the prior year, driven by increased Energy Storage Solutions projects in Aus

Exhibit 99.1 Energy Vault Reports Third Quarter 2025 Financial Results Contract revenue backlog of $920 million, up 112% year-to-date Q3 2025 Revenue of $33.3 million improved 27x versus the prior year, driven by increased Energy Storage Solutions projects in Australia and first revenue streams from US-based own and operate Asset Vault projects Q3 2025 GAAP gross profit of $9.0 million up nearly 1

November 10, 2025 EX-10.10

AMENDED AND RESTATED LIMITED LIABILITY COMPANY AGREEMENT ASSET VAULT, LLC A DELAWARE LIMITED LIABILITY COMPANY OCTOBER 9, 2025

Exhibit 10.10 AMENDED AND RESTATED LIMITED LIABILITY COMPANY AGREEMENT OF ASSET VAULT, LLC A DELAWARE LIMITED LIABILITY COMPANY OCTOBER 9, 2025 THE MEMBERSHIP INTERESTS (AS DEFINED HEREIN) GOVERNED BY THIS AMENDED AND RESTATED LIMITED LIABILITY COMPANY AGREEMENT HAVE NOT BEEN REGISTERED UNDER THE UNITED STATES SECURITIES ACT OF 1933, AS AMENDED, OR UNDER ANY OTHER APPLICABLE SECURITIES LAWS. SUCH

November 10, 2025 EX-10.8

REGISTRATION RIGHTS AGREEMENT

Exhibit 10.8 REGISTRATION RIGHTS AGREEMENT THIS REGISTRATION RIGHTS AGREEMENT (this “Agreement”), dated as of September 22, 2025, is made by and between YA II PN, LTD., a Cayman Islands exempt limited company (the “Investor”), and ENERGY VAULT HOLDINGS, INC., a company incorporated under the laws of the State of Delaware (the “Company”). The Investor and the Company may be referred to herein indiv

November 10, 2025 EX-10.7

Exhibit 10.7 SECURITIES PURCHASE AGREEMENT THIS SECURITIES PURCHASE AGREEMENT (this “Agreement”), dated as of September 22, 2025, is between ENERGY VAULT HOLDINGS, INC., a company incorporated under the laws of the State of Delaware, with principal e

exhibit107 Exhibit 10.7 SECURITIES PURCHASE AGREEMENT THIS SECURITIES PURCHASE AGREEMENT (this “Agreement”), dated as of September 22, 2025, is between ENERGY VAULT HOLDINGS, INC., a company incorporated under the laws of the State of Delaware, with principal executive offices located at 4165 East Thousand Oaks Blvd., Suite 100, Westlake Village, CA, 91362 (the “Company”), and each of the investor

November 10, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x 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 o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file numbe

October 29, 2025 EX-99.1

© 2025 ENERGY VAULT, ALL RIGHTS RESERVED | Confidential FOUO (For Officia l Use Only) - PROPRIETARY INFORMATION OF ENERGY VAULT, INC 1 INVESTOR DAY OCTOBER 29TH 2025 Exhibit 99.1 © 2025 ENERGY VAULT, ALL RIGHTS RESERVED | Confidential FOUO (For Offic

evpresentationxinvestor © 2025 ENERGY VAULT, ALL RIGHTS RESERVED | Confidential FOUO (For Officia l Use Only) - PROPRIETARY INFORMATION OF ENERGY VAULT, INC 1 INVESTOR DAY OCTOBER 29TH 2025 Exhibit 99.

October 29, 2025 8-K

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, 2025 Energy Vault Hol

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, 2025 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commi

October 23, 2025 8-K

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 23, 2025 Energy Vault Hol

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 23, 2025 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commi

October 23, 2025 EX-99.1

Energy Vault Announces Acquisition of 150 MW Battery Energy Storage Project in Texas Under New Asset Vault Platform SOSA BESS Project acquired from Shell’s US subsidiary Savion, representing the first energy storage asset formally acquired under Ener

Exhibit 99.1 Energy Vault Announces Acquisition of 150 MW Battery Energy Storage Project in Texas Under New Asset Vault Platform SOSA BESS Project acquired from Shell’s US subsidiary Savion, representing the first energy storage asset formally acquired under Energy Vault’s recently launched Asset Vault energy asset management platform Construction to begin immediately in Q4 2025 with planned comme

October 14, 2025 8-K

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 9, 2025 Energy Vault Hold

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 9, 2025 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commis

October 14, 2025 EX-99.1

Energy Vault Closes $300 Million Preferred Equity Investment with Orion Infrastructure Capital (OIC), Officially Launching “Asset Vault” Platform in Move to Energy Asset Management and Long-Term Asset Development Energy Vault’s commitment from OIC, a

Exhibit 99.1 Energy Vault Closes $300 Million Preferred Equity Investment with Orion Infrastructure Capital (OIC), Officially Launching “Asset Vault” Platform in Move to Energy Asset Management and Long-Term Asset Development Energy Vault’s commitment from OIC, a multi-billion dollar infrastructure manager, highlights its attractive development pipeline and integrated IPP strategy while accelerati

October 7, 2025 DRS

Confidential Treatment Requested by Energy Vault Holdings, Inc. Pursuant to 17 C.F.R. Section 200.83 As confidentially submitted to the U.S. Securities and Exchange Commission on October 6, 2025. This draft registration statement has not been publicl

TABLE OF CONTENTS Confidential Treatment Requested by Energy Vault Holdings, Inc. Pursuant to 17 C.F.R. Section 200.83 As confidentially submitted to the U.S. Securities and Exchange Commission on October 6, 2025. This draft registration statement has not been publicly filed with the U.S. Securities and Exchange Commission and all information herein remains strictly confidential. Registration No.

September 26, 2025 EX-99.1

Energy Vault Holdings Secures Additional $50 Million to Support Energy Storage Growth Projects Working capital facility is in addition to the previously announced $300 million preferred equity investment for “Asset Vault”, enabling flexibility to add

Exhibit 99.1 Energy Vault Holdings Secures Additional $50 Million to Support Energy Storage Growth Projects Working capital facility is in addition to the previously announced $300 million preferred equity investment for “Asset Vault”, enabling flexibility to address growth in demand for energy storage and AI data center buildouts WESTLAKE VILLAGE – September 26, 2025 – Energy Vault Holdings Inc.

September 26, 2025 8-K

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 22, 2025 Energy Vault H

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 22, 2025 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Com

September 25, 2025 144

144

144 0001977206 XXXXXXXX LIVE 0001828536 Energy Vault Holdings, Inc. 001-39982 4165 EAST THOUSAND OAKS BLVD. SUITE 100 WESTLAKE VILLIAGE CA 91362 805-852-0000 Ladwa Akshay Officer Common Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917 75000 233030.44 161855407 09/25/2025 NYSE Common 01/01/2023 Restricted Stock Vesting Issuer N 6840 01/01/2023 Compensation Common 03/31/2023 Rest

September 24, 2025 144

144

144 0001977206 XXXXXXXX LIVE 0001828536 Energy Vault Holdings, Inc. 001-39982 4165 EAST THOUSAND OAKS BLVD. SUITE 100 WESTLAKE VILLIAGE CA 91362 805-852-0000 Ladwa Akshay Officer Common Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917 75000 223232.78 161855407 09/24/2025 NYSE Common 02/28/2023 Restricted Stock Vesting Issuer N 63474 02/28/2023 Compensation Common 08/31/2023 Res

September 23, 2025 144

144

144 0001977206 XXXXXXXX LIVE 0001828536 Energy Vault Holdings, Inc. 001-39982 4165 EAST THOUSAND OAKS BLVD. SUITE 100 WESTLAKE VILLIAGE CA 91362 805-852-0000 Ladwa Akshay Officer Common Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917 75000 242631.64 161855407 09/23/2025 NYSE Common 11/29/2022 Restricted Stock Vesting Issuer N 31772 11/29/2022 Compensation Common 02/28/2023 Res

September 22, 2025 144

144

144 0001977206 XXXXXXXX LIVE 0001828536 Energy Vault Holdings, Inc. 001-39982 4165 EAST THOUSAND OAKS BLVD. SUITE 100 WESTLAKE VILLIAGE CA 91362 805-852-0000 Ladwa Akshay Officer Common Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917 75000 228272.29 161855407 09/22/2025 NYSE Common 11/29/2022 Restricted Stock Vesting Issuer N 60662 11/29/2022 Compensation Common 11/30/2022 Res

September 12, 2025 144

144

144 0001870889 XXXXXXXX LIVE 0001828536 Energy Vault Holdings, Inc. 001-39982 4165 EAST THOUSAND OAKS BLVD. SUITE 100 WESTLAKE VILLIAGE CA 91362 805-852-0000 Beer Michael Thomas Officer Common Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917 50000 108263.43 161855407 09/12/2025 NYSE Common 07/17/2025 Restricted Stock Vesting Issuer N 50000 07/17/2025 Compensation N Michael Beer

September 5, 2025 8-K

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 29, 2025 Energy Vault Hold

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 29, 2025 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commis

September 3, 2025 EX-99.1

Energy Vault Receives Confirmation Letter from the NYSE Regarding Compliance with Continued Listing Criteria Driven by Higher Share Price Trading Range

Exhibit 99.1 Energy Vault Receives Confirmation Letter from the NYSE Regarding Compliance with Continued Listing Criteria Driven by Higher Share Price Trading Range WESTLAKE VILLAGE, Calif. – September 3, 2025 – Energy Vault Holdings, Inc. (“Energy Vault” or the “Company”) (NYSE: NRGV), a global energy storage company, today announced that it received written notice from the New York Stock Exchang

September 3, 2025 8-K

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 2, 2025 Energy Vault Ho

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 2, 2025 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Comm

August 11, 2025 8-K

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 7, 2025 Energy Vault Holdi

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 7, 2025 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commiss

August 11, 2025 EX-99.1

Energy Vault Enters into Exclusive Agreement for $300 million Preferred Equity Investment to launch “Asset Vault”, Accelerating the execution of 1.5GW of Global Energy Storage Projects under the Company’s IPP Build, Own and Operate Strategy Capital f

Exhibit 99.1 Energy Vault Enters into Exclusive Agreement for $300 million Preferred Equity Investment to launch “Asset Vault”, Accelerating the execution of 1.5GW of Global Energy Storage Projects under the Company’s IPP Build, Own and Operate Strategy Capital from a leading, multi-billion-dollar infrastructure fund expected to enable over $1.0 Billion in CapEx spending for 1.5 GW of projects und

August 8, 2025 EX-10.4

Equity Purchase Agreement, dated August 6, 2025, by and between Energy Vault Holdings, Inc. and Helena Global Investment Opportunities I LTD

Exhibit 10.4 PURCHASE AGREEMENT THIS PURCHASE AGREEMENT (this “Agreement”), dated as of August 6, 2025, is made by and between HELENA GLOBAL INVESTMENT OPPORTUNITIES I LTD. (the “Investor”), and ENERGY VAULT HOLDINGS, INC.,, a Delaware corporation (the “Company”). WHEREAS, the parties desire that, upon the terms and subject to the conditions contained herein, the Company shall have the right to is

August 8, 2025 8-K

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 7, 2025 Energy Vault Holdi

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 7, 2025 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commiss

August 8, 2025 EX-99.1

Energy Vault Secures Final FIRB Approval and Completes Acquisition of 125 MW/1,000 MWh Stoney Creek BESS in Australia Stoney Creek represents first acquisition in Australia as part of Energy Vault’s global “Own & Operate” portfolio and reinforces lon

Exhibit 99.1 Energy Vault Secures Final FIRB Approval and Completes Acquisition of 125 MW/1,000 MWh Stoney Creek BESS in Australia Stoney Creek represents first acquisition in Australia as part of Energy Vault’s global “Own & Operate” portfolio and reinforces long-term commitment to Australia’s energy transition 125 MW/1,000 MWh Stoney Creek BESS set to support grid reliability and flexibility whi

August 8, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x 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 o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001

August 7, 2025 EX-99.1

Energy Vault Reports Second Quarter 2025 Financial Results Current Contract revenue backlog increased 47% to $954 million versus Q1, now up 120% year-to-date Q2 2025 Revenue increased 126% to $8.5 million compared to the prior year period Q2 2025 GAA

Exhibit 99.1 Energy Vault Reports Second Quarter 2025 Financial Results Current Contract revenue backlog increased 47% to $954 million versus Q1, now up 120% year-to-date Q2 2025 Revenue increased 126% to $8.5 million compared to the prior year period Q2 2025 GAAP gross profit of 29.6%, increasing 140% versus prior year to $2.5 million Q2 2025 Adjusted EBITDA improved 11% versus prior year, to a l

August 7, 2025 8-K

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 7, 2025 Energy Vault Holdi

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 7, 2025 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commiss

August 6, 2025 EX-99.1

Energy Vault Announces Contract with Consumers Energy for 75 MW/300 MWh Battery Energy Storage Projects in Michigan Energy Vault awarded project by Michigan’s largest energy provider to supply two battery energy storage systems (BESS), totaling 75 MW

Exhibit 99.1 Energy Vault Announces Contract with Consumers Energy for 75 MW/300 MWh Battery Energy Storage Projects in Michigan Energy Vault awarded project by Michigan’s largest energy provider to supply two battery energy storage systems (BESS), totaling 75 MW/300 MWh, in Iosco and Bay Counties Battery deliveries expected to commence in Q4 2025 enabling construction to begin in Q1 2026, with co

August 6, 2025 8-K

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 5, 2025 Energy Vault Holdi

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 5, 2025 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commiss

July 28, 2025 EX-FILING FEES

Calculation of Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) Energy Vault Holdings, Inc.

July 28, 2025 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, 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): July 23, 2025 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commissi

July 28, 2025 EX-99.1

Energy Vault Closes $18 Million Project Financing for 57 MW/114 MWh Cross Trails BESS Serving the Texas ERCOT Market $18 million project financing continues quarterly string of returning cash back to Energy Vault’s balance sheet following prior year

Exhibit 99.1 Energy Vault Closes $18 Million Project Financing for 57 MW/114 MWh Cross Trails BESS Serving the Texas ERCOT Market $18 million project financing continues quarterly string of returning cash back to Energy Vault’s balance sheet following prior year equity investments in new “Owned and Operate” assets The Cross Trails BESS, completed and brought to full commercial operation in June 20

July 28, 2025 EX-10.1

Credit Agreement, dated as of July 23, 2025, by and among Cross Trails Energy Storage Project, LLC, Wilmington Trust, National Association, as administrative agent and collateral agent, and each of the lenders party thereto

crosstrails-creditagreem Exhibit 10.1 CREDIT AGREEMENT dated as of July 23, 2025, among CROSS TRAILS ENERGY STORAGE PROJECT, LLC, as Borrower, THE LENDERS PARTY HERETO FROM TIME TO TIME, as Lenders WILMINGTON TRUST, NATIONAL ASSOCIATION, as Administrative Agent and WILMINGTON TRUST, NATIONAL ASSOCIATION, as Collateral Agent $17,806,243.91 CERTAIN INFORMATION HAS BEEN EXCLUDED FROM THIS EXHIBIT BEC

July 28, 2025 S-8

As filed with the Securities and Exchange Commission on July 28, 2025

As filed with the Securities and Exchange Commission on July 28, 2025 Registration No.

June 11, 2025 8-K

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): June 11, 2025 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commissi

June 11, 2025 EX-99.1

Energy Vault Achieves Major Strategic Milestone with Commercial Operation of Cross Trails BESS, Marking the First Asset Placed in Service Under “Own & Operate” Growth Strategy 57 MW two-hour battery energy storage system (BESS) in Snyder, Texas now p

Exhibit 99.1 Energy Vault Achieves Major Strategic Milestone with Commercial Operation of Cross Trails BESS, Marking the First Asset Placed in Service Under “Own & Operate” Growth Strategy 57 MW two-hour battery energy storage system (BESS) in Snyder, Texas now providing energy and ancillary services at highly attractive node in the Electric Reliability Council of Texas (ERCOT) region Project plac

June 5, 2025 8-K

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 30, 2025 Energy Vault Holding

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 30, 2025 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commissio

June 5, 2025 EX-99.1

Energy Vault, Jupiter Power Announce Agreement for Additional 100 MW/200 MWh Battery Energy Storage System Building on a successful 2024 deployment, the new 100 MW/200 MWh BESS will enhance grid resiliency in the ERCOT region using Energy Vault’s B-V

Exhibit 99.1 Energy Vault, Jupiter Power Announce Agreement for Additional 100 MW/200 MWh Battery Energy Storage System Building on a successful 2024 deployment, the new 100 MW/200 MWh BESS will enhance grid resiliency in the ERCOT region using Energy Vault’s B-VAULT™ and VaultOS™ platform WESTLAKE VILLAGE, Calif. & AUSTIN, Texas – June 4, 2025 – Energy Vault Holdings Inc. (NYSE: NRGV) ("Energy Va

May 30, 2025 8-K

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 30, 2025 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commissio

May 30, 2025 424B5

Up to $25,000,000 Energy Vault Holdings, Inc. Common Stock

Filed Pursuant to Rule 424(b)(5) Registration No. 333-273089 PROSPECTUS SUPPLEMENT (to Prospectus Dated July 20, 2023) Up to $25,000,000 Energy Vault Holdings, Inc. Common Stock This prospectus supplement relates to the issuance and sale of up to $25,000,000 of newly issued shares of our common stock, par value $0.001 per share (the “Shares”), that we may sell to Hudson Global Ventures, LLC (“Huds

May 13, 2025 NT 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25 NOTIFICATION OF LATE FILING

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25 NOTIFICATION OF LATE FILING SEC File Number: 001-39982 CUSIP Number: 29280W109 (Check one): ☐ Form 10-K ☐ Form 20-F ☐ Form 11-K ☒ Form 10-Q ☐ Form 10-D ☐ Form N-SAR ☐ Form N-CSR For Period Ended: March 31, 2025 ☐ Transition Report on Form 10-K ☐ Transition Report on Form 20-F ☐ Transition Report on Form 11-K ☐ Tran

May 13, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x 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 o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 00

May 13, 2025 EX-10.1

2025 Employment Inducement Award Plan

Exhibit 10.1 ENERGY VAULT HOLDINGS, INC. 2025 EMPLOYMENT INDUCEMENT AWARD PLAN ARTICLE 1. INTRODUCTION. The purpose of the Plan is to promote the long-term success of the Company and the creation of stockholder value by (a) encouraging Eligible Individuals to focus on critical long- range corporate objectives, (b) encouraging the attraction and retention of Eligible Individuals with exceptional qu

May 13, 2025 EX-10.2

Form of Stock Option Grant Notice and Stock Option Agreement under the 2025 Employment Inducement Award Plan

Exhibit 10.2 ENERGY VAULT HOLDINGS, INC. 2025 EMPLOYMENT INDUCEMENT AWARD PLAN NOTICE OF STOCK OPTION GRANT You have been granted the following option to purchase shares of the Common Stock of Energy Vault Holdings, Inc. (the “Company”) on the terms and conditions set out below: Name of Optionee: «Name» Total Number of Shares: «TotalShares» Type of Option (U.S. Tax Status): Nonstatutory Stock Opti

May 13, 2025 EX-10.6

Form of Credit Agreement, dated May 12, 2025, by and between Energy Vault Holdings, Inc. and Crescent Cove Opportunity Lending, LLC

Exhibit 10.6 CREDIT AGREEMENT This CREDIT AGREEMENT is entered into as of May 12, 2025, among ENERGY VAULT HOLDINGS, INC., a Delaware corporation (the “Borrower”), the Guarantors (defined herein), the lenders identified on the signature pages hereof (each of such lenders, together with its successors and permitted assigns, a “Lender”, and collectively, the “Lenders”), and CRESCENT COVE OPPORTUNITY

May 13, 2025 EX-10.3

Form of Restricted Stock Unit Award Grant Notice and Restricted Stock Unit Award Agreement under the 2025 Employment Inducement Award Plan

EXHIBIT 10.3 ENERGY VAULT HOLDINGS, INC. 2025 EMPLOYMENT INDUCEMENT AWARD PLAN NOTICE OF RESTRICTED STOCK UNIT AWARD You have been granted Restricted Stock Units (“RSUs”), each representing the right to receive one share of the Common Stock of Energy Vault Holdings, Inc. (the “Company”) on the following terms and conditions: Name of Recipient: «Name» Total Number of RSUs Granted: «TotalRSUs» Date

May 13, 2025 EX-10.5

Equity Purchase Agreement, dated March 31, 2025, by and between Energy Vault Holdings, Inc. and Hudson Global Ventures, LLC

Execution Version EQUITY PURCHASE AGREEMENT This equity purchase agreement is entered into as of March 31, 2025 (this “Agreement”), by and between Energy Vault Holdings, Inc.

May 13, 2025 EX-10.4

Note Purchase Agreement, dated April 4, 2025, by and between Calistoga Resiliency Center, LLC and Eagle Point Credit Management, LLC

Execution Version CALISTOGA RESILIENCY CENTER, LLC $27,826,365.17 12.50% Senior Secured Notes due April 4, 2032 NOTE PURCHASE AGREEMENT Dated April 4, 2025 Exhibit 10.4 i TABLE OF CONTENTS SECTION 1. AUTHORIZATION OF NOTES. ...................................................................1 SECTION 2. CONVERSION OF INDEBTEDNESS. .........................................................1 SECTION 3

May 12, 2025 8-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): May 12, 2025 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commissio

May 12, 2025 EX-99.1

Energy Vault Reports First Quarter 2025 Financial Results Contract revenue backlog of $648 million, up 49% year-to-date on Australia and U.S. strength Q1 2025 Revenue increased by 10% versus prior year to $8.5 million driven by Australia projects and

Exhibit 99.1 Energy Vault Reports First Quarter 2025 Financial Results Contract revenue backlog of $648 million, up 49% year-to-date on Australia and U.S. strength Q1 2025 Revenue increased by 10% versus prior year to $8.5 million driven by Australia projects and India license Q1 2025 GAAP gross margin more than doubled to 57.1% versus prior year on favorable regional and revenue mix Quarter-end C

April 21, 2025 8-K

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 16, 2025 Energy Vault Holdi

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 16, 2025 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commiss

April 10, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) 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 ¨ Preliminary Proxy Statement ¨ Confidential, For Use of the Commission only (as permitted by Rule 14a-6(e)(2)) ¨ Definitive Pr

April 10, 2025 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) 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 ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission only (as permitted by Rule 14a-6(e)(2)) ☒ Definitive Pr

April 1, 2025 EX-10.8

Employment Agreement by and between Energy Vault, Inc. and Christopher Wiese, dated as of November 10, 2022

EMPLOYMENT AGREEMENT between Energy Vault, Inc. and Christopher Wiese This EMPLOYMENT AGREEMENT (this “Agreement”), dated as of November 10, 2022, is made between Energy Vault, Inc. (the “Company”) and Christopher Wiese (the “Executive”) (collectively referred to herein as the “Parties” or individually referred to as a “Party”). RECITALS (A) The Company and Executive are parties to that certain Of

April 1, 2025 EX-10.24

, 2025, by and between Calistoga Resiliency Center, LLC and Jeff

Execution Version US-DOCS\157730382.20 CREDIT AGREEMENT dated as of March 31, 2025, among CALISTOGA RESILIENCY CENTER, LLC, as Borrower, JEFFERIES FINANCE LLC, as Administrative Agent, Collateral Agent and Sole Lead Arranger, and THE LENDERS NAMED HEREIN as Lenders $27,826,365.17 Exhibit 10.24 TABLE OF CONTENTS PAGE US-DOCS\157730382.20 ARTICLE I DEFINITIONS AND ACCOUNTING TERMS...................

April 1, 2025 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) x 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 o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-399

April 1, 2025 EX-19.1

Energy Vault Holdings, Inc. Insider Trading Policy

Exhibit 19.1 Energy Vault Holdings, Inc. Insider Trading Compliance Policy and Procedures Federal and state laws prohibit trading in the securities of a company while in possession of material nonpublic information and in breach of a duty of trust or confidence. These laws also prohibit anyone who is aware of material nonpublic information from providing this information to others who may trade. V

April 1, 2025 EX-21.1

List of Subsidiaries of Energy Vault Holdings, Inc.

Exhibit 21.1 List of Subsidiaries Name of Subsidiary Country of Incorporation Percentage Owned Energy Vault, Inc. United States (Delaware) 100% Calistoga Resiliency Center Holdco, LLC United States (Delaware) 100% Calistoga Resiliency Center, LLC United States (Delaware) 100% Cetus Energy LLC United States (Delaware) 100% Cetus Energy, Inc. United States (Delaware) 85% Cross Trails Energy Storage

March 21, 2025 8-K

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 20, 2025 Energy Vault Holdi

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 20, 2025 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commiss

March 18, 2025 NT 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25 NOTIFICATION OF LATE FILING

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25 NOTIFICATION OF LATE FILING SEC File Number: 001-39982 CUSIP Number: 29280W109 (Check one): ☒ Form 10-K ☐ Form 20-F ☐ Form 11-K ☐ Form 10-Q ☐ Form 10-D ☐ Form N-SAR ☐ Form N-CSR For Period Ended: December 31, 2024 ☐ Transition Report on Form 10-K ☐ Transition Report on Form 20-F ☐ Transition Report on Form 11-K ☐ T

March 17, 2025 EX-99.1

Energy Vault Reports Fourth Quarter and Full Year 2024 Financial Results Contract Revenue backlog increased 90% to $660 million from prior quarter of $350 million, more than quadrupling on a year-over-year basis, reflecting strength in Australia and

Exhibit 99.1 Energy Vault Reports Fourth Quarter and Full Year 2024 Financial Results Contract Revenue backlog increased 90% to $660 million from prior quarter of $350 million, more than quadrupling on a year-over-year basis, reflecting strength in Australia and new US IPP and utility customers and acceleration of asset ownership with long-term offtake agreements Strong growth in Australia in exec

March 17, 2025 8-K

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 17, 2025 Energy Vault Holdi

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 17, 2025 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commiss

November 14, 2024 8-K

Regulation FD Disclosure

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 13, 2024 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Comm

November 12, 2024 EX-1.1

Open Market Sales Agreement, dated November 12, 2024, among Jeffries LLC, as sales agent and/or principal, and Energy Vault Holdings, Inc.

Execution Version Exhibit 1.1 OPEN MARKET SALE AGREEMENTSM November 12, 2024 JEFFERIES LLC 520 Madison Avenue New York, New York 10022 Ladies and Gentlemen: Energy Vault Holdings, Inc., a Delaware corporation (the “Company”), proposes, subject to the terms and conditions stated herein, to issue and sell from time to time through Jefferies LLC, as sales agent and/or principal (the “Agent”), shares

November 12, 2024 EX-99.1

Energy Vault Reports Third Quarter 2024 Financial Results Revenue backlog grew 33% quarter-over-quarter to $350 million primarily reflecting new contracts in the U.S. with Jupiter Power and Gridmatic; Australia project awards now exceed 2.6GWh Transi

Exhibit 99.1 Energy Vault Reports Third Quarter 2024 Financial Results Revenue backlog grew 33% quarter-over-quarter to $350 million primarily reflecting new contracts in the U.S. with Jupiter Power and Gridmatic; Australia project awards now exceed 2.6GWh Transitional Q3 revenue yielded 40%+ GAAP gross margin with higher services and software content; YTD 2024 GAAP Gross Margins are 28.3% Operati

November 12, 2024 424B5

Up to $50,000,000 Energy Vault Holdings, Inc. Common Stock

Filed Pursuant to Rule 424(b)(5) Registration No. 333-273089 PROSPECTUS SUPPLEMENT (to Prospectus Dated July 20, 2023) Up to $50,000,000 Energy Vault Holdings, Inc. Common Stock We have entered into an Open Market Sales AgreementTM (the “Sales Agreement”) with Jefferies LLC (“Jefferies”) relating to the sale of shares of our common stock, par value $0.0001 per share (“common stock”), offered by th

November 12, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x 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 o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file numbe

November 12, 2024 8-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): November 12, 2024 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Comm

September 16, 2024 SC 13G

NRGV / Energy Vault Holdings, Inc. / SailingStone Capital Partners LLC - 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. )* Energy Vault Holdings, Inc. (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 29280W109 (CUSIP Number) July 31, 2024 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the

September 13, 2024 8-K

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing

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 13, 2024 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Com

August 6, 2024 EX-99.1

Energy Vault Reports Second Quarter 2024 Financial Results Announced new 400MWh battery storage project in Australia with ACEN, hired new Head of Global Sales and entered partnership with structural engineering firm Skidmore Owings & Merrill (SOM) to

Exhibit 99.1 Energy Vault Reports Second Quarter 2024 Financial Results Announced new 400MWh battery storage project in Australia with ACEN, hired new Head of Global Sales and entered partnership with structural engineering firm Skidmore Owings & Merrill (SOM) to integrate gravity energy storage within superstructure building design Q2 GAAP Gross margin of 27.8% driven by strong management and exe

August 6, 2024 8-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): August 6, 2024 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commiss

August 6, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x 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 o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001

May 28, 2024 8-K/A

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/A 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, 2024 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commiss

May 24, 2024 8-K

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 24, 2024 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commissio

May 9, 2024 8-K

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 9, 2024 Energy Vault Holdings

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 9, 2024 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commission

May 9, 2024 EX-99.1

© 2024 ENERGY VAULT, ALL RIGHTS RESERVED 1 © 2024 ENERGY VAULT, ALL RIGHTS RESERVED 2 M A R K E T © 2024 ENERGY VAULT, ALL RIGHTS RESERVED 3 S u p p l y a n d D e m a n d a n d D e c a r b o n i z a t i o n C o n u n d r u m M a k i n g S t o r a g e

evpresentationxinvester © 2024 ENERGY VAULT, ALL RIGHTS RESERVED 1 © 2024 ENERGY VAULT, ALL RIGHTS RESERVED 2 M A R K E T © 2024 ENERGY VAULT, ALL RIGHTS RESERVED 3 S u p p l y a n d D e m a n d a n d D e c a r b o n i z a t i o n C o n u n d r u m M a k i n g S t o r a g e a n I m p e r a t i v e Storage – maintaining grid reliability as wind and solar become more pervasive W I N D P O W E R S O

May 8, 2024 EX-99.1

Energy Vault Reports First Quarter 2024 Financial Results Revenue of $7.8 million from recognition of Utility and IPP storage projects, in-line with expectations; Licensing revenue from GESSOL in Southern Africa is expected later in 2024 GAAP Gross m

Exhibit 99.1 Energy Vault Reports First Quarter 2024 Financial Results Revenue of $7.8 million from recognition of Utility and IPP storage projects, in-line with expectations; Licensing revenue from GESSOL in Southern Africa is expected later in 2024 GAAP Gross margin of 26.7% driven by strong management and execution on US battery projects Cash OpEx of $16.7 million, improved 22% year-over-year a

May 8, 2024 EX-10.2

Retention Bonus Agreement by and between Energy Vault Holdings, Inc. and Robert Piconi, dated as of

Energy Vault SA – Via Cantonale 19 – 6900 Lugano – Switzerland Iscr. Registro del Commercio del Canton Ticino n. CHE-134.914.795 Energy Vault SA Via Cantonale 19 Lugano 6900 SWITZERLAND Robert Piconi Riva Lago Colombaio 1 6921 Vico Morcote 05 April 2024 Retention Bonus Dear Rob, At Energy Vault, we realize that our people are our strength. We also realize that the best way to succeed in our compet

May 8, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x 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 o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 00

May 8, 2024 EX-10.1

Employment Agreement by and between Energy Vault, Inc. and Akshay Ladwa, dated as of October 6, 2023

EMPLOYMENT AGREEMENT between Energy Vault, Inc. and Akshay Ladwa This EMPLOYMENT AGREEMENT (this “Agreement”), dated as of October 6, 2023, is made between Energy Vault, Inc. (the “Company”) and Akshay Ladwa (the “Executive”) (collectively referred to herein as the “Parties” or individually referred to as a “Party”). RECITALS (A) The Company and Executive are parties to that certain Offer Letter,

May 8, 2024 8-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): May 8, 2024 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commission

May 8, 2024 EX-10.3

Retention Bonus Agreement by and between Energy Vault Holdings, Inc. and Akshay Ladwa, dated as of April 5, 2024

CONFIDENTIAL AND NOT FOR DISTRIBUTION OR RECIRCULATION TO: Akshay Ladwa Chief Engineering Officer April 5, 2024 RE: 2024 Retention Bonus Dear Akshay, At Energy Vault, we recognize that our people are the foundation of our strength.

April 19, 2024 EX-10.1

Separation and General Release Agreement by and between Energy Vault Holdings, Inc. and Jan Kees van Gaalen, dated as of April 15, 2024 (filed herewith).

SEPARATION AND GENERAL RELEASE AGREEMENT This Separation and General Release Agreement (“Agreement”) is made by and between Energy Vault Holdings, Inc.

April 19, 2024 8-K/A

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/A 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 4, 2024 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commis

April 9, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) 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 o Preliminary Proxy Statement o Confidential, For Use of the Commission only (as permitted by Rule 14a-6(e)(2)) x Definitive Pr

April 9, 2024 ARS

Annual Report www.energyvault.com © 2024 Energy Vault, Inc. All Rights Reserved Energy Vault Holdings, Inc. Dfasdfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffasgasgaggagagaegaergaegaegaegaegaegaegae gaegaegaegaegaegaegaegaegaegaeg

Annual Report www.energyvault.com © 2024 Energy Vault, Inc. All Rights Reserved Energy Vault Holdings, Inc. Dfasdfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffasgasgaggagagaegaergaegaegaegaegaegaegae gaegaegaegaegaegaegaegaegaegaegaegaergeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

April 4, 2024 EX-99.1

Energy Vault Appoints Michael Beer as Chief Financial Officer Seasoned financial executive to bring decades of experience in the energy, tech and transportation sectors to leading global energy storage company

Exhibit 99.1 Energy Vault Appoints Michael Beer as Chief Financial Officer Seasoned financial executive to bring decades of experience in the energy, tech and transportation sectors to leading global energy storage company WESTLAKE VILLAGE, Calif. – April 4, 2023 – Energy Vault Holdings, Inc. (NYSE: NRGV) (“Energy Vault” or the “Company”), a leader in sustainable grid-scale energy storage solution

April 4, 2024 8-K

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 4, 2024 Energy Vault Holdin

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 4, 2024 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commissi

April 4, 2024 EX-10.1

Form of Offer Letter, dated as of April 4, 2024, by and between Michael T. Beer and Energy Vault Holdings, Inc.

energyvaultemploymentoff Energy Vault, Inc. 4360 Park Terrace Drive, Suite 100 Westlake Village, CA 91361 United States l www.energyvault.com April 3, 2024 Michael T. Beer 103 Acacia Avenue Belvedere, CA 94920 [email protected] Re: Offer and Terms of Employment Dear Michael, It gives me great pleasure to offer you the position of Chief Financial Officer for Energy Vault Holdings, Inc. (the “Company

March 13, 2024 EX-10.19

Consulting agreement, dated March 6, 2024, by and between Energy Vault, Inc. and Zia Huque

Exhibit 10.19 CONSULTING AGREEMENT This Consulting Agreement (“Agreement”) is made and entered into as of the 6th day of March 2024, by and between Energy Vault, Inc., a Delaware corporation (the “Company”), and Zia Huque (“Consultant”) in the County of Los Angeles, State of California. The Company desires to retain Consultant as an independent contractor to perform consulting services for the Com

March 13, 2024 EX-97

Policy Relating to Recovery of Erroneously Awarded Compensation

Exhibit 97 ENERGY VAULT HOLDINGS, INC. POLICY FOR RECOVERY OF ERRONEOUSLY AWARDED COMPENSATION Energy Vault Holdings, Inc. (the “Company”) has adopted this Policy for Recovery of Erroneously Awarded Compensation (the “Policy”), effective as of October 2, 2023 (the “Effective Date”). Capitalized terms used in this Policy but not otherwise defined herein are defined in Section 11. 1.Persons Subject

March 13, 2024 EX-10.10

Form of Stock Option Grant Notice and Stock Option Agreement under the 2017 Stock Incentive Plan

ENERGY VAULT, INC. 2017 STOCK INCENTIVE PLAN STOCK OPTION AGREEMENT Unless otherwise defined herein, the terms defined in the 2017 Stock Incentive Plan (the “Plan”) shall have the same defined meanings in this Stock Option Agreement (the “Option Agreement”). I. GRANT SUMMARY a. See Grant Summary sent to you via Carta (“Grant Summary”) for specific terms of the grant. b. Termination Period: This Op

March 13, 2024 EX-10.11

Form of Restricted Stock Unit Award Grant Notice and Restricted Stock Unit Award Agreement under the 2020 Stock Plan

Exhibit 10.11 Energy Vault, Inc. 2020 Stock Plan Notice of Restricted Stock Unit Award You (“Recipient”) have been granted Restricted Stock Units (“RSUs”) representing shares of the Common Stock of Energy Vault, Inc. (the “Company”) on the following terms: Name of Recipient: «Name» Total Number of RSUs Granted: «TotalRSUs» Date of Grant: «DateGrant» Vesting Commencement Date: «VestComDate» Expirat

March 13, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) x 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 o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-399

March 13, 2024 EX-4.1

Exhibit 4.1

Exhibit 4.1 DESCRIPTION OF CAPITAL STOCK Energy Vault Holdings, Inc., a Delaware corporation (the “Company,” “we” or “our”), currently has one class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended, the Company’s common stock, par value $0.0001 per share (the “Common Stock”). The following summary includes a brief description of the Common Stock as well

March 13, 2024 EX-21.1

List of Subsidiaries of Energy Vault Holdings, Inc.

Exhibit 21.1 List of 100% Owned Subsidiaries as of December 31, 2023 Name of Subsidiary Country of Incorporation Energy Vault, Inc. United States (Delaware) Calistoga Resiliency Center, LLC United States (Delaware) Cetus Energy LLC United States (Delaware) Cross Trails Energy Storage Project, LLC United States (Delaware) Snyder Housing LLC United States (Texas) Energy Vault SA Switzerland Energy V

March 12, 2024 8-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): March 12, 2024 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commiss

March 12, 2024 EX-99.1

Energy Vault Reports Fourth Quarter and Full Year 2023 Financial Results FY 2023 revenue of $341.5 million, up 134% YoY and 18% QoQ, within annual guidance range Increased cash position to $146 million with no debt, above prior guidance of $132 milli

Exhibit 99.1 Energy Vault Reports Fourth Quarter and Full Year 2023 Financial Results FY 2023 revenue of $341.5 million, up 134% YoY and 18% QoQ, within annual guidance range Increased cash position to $146 million with no debt, above prior guidance of $132 million from Q3 2023 Reduced quarterly cash Operating Expense run rate by 25-30% through actions taken in Q4 2023, enabling a 2024 reduced qua

March 12, 2024 8-K/A

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/A 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 14, 2023 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Co

February 1, 2024 8-K

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 1, 2024 Energy Vault Hol

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 1, 2024 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commi

December 20, 2023 8-K

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 14, 2023 Energy Vault Ho

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 14, 2023 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Comm

December 20, 2023 EX-99.1

Energy Vault Appoints Australian Energy Sector Leader Stephanie Unwin to Its Board Of Directors Ms. Unwin brings extensive industry experience and leadership from executive roles at leading energy and renewables companies, including Horizon Power and

Exhibit 99.1 Energy Vault Appoints Australian Energy Sector Leader Stephanie Unwin to Its Board Of Directors Ms. Unwin brings extensive industry experience and leadership from executive roles at leading energy and renewables companies, including Horizon Power and Zenith Energy WESTLAKE VILLAGE, Calif. – December 14, 2023 – Energy Vault Holdings, Inc. (NYSE: NRGV) (“Energy Vault” or the “Company”),

November 7, 2023 EX-99.1

Energy Vault Reports Third Quarter 2023 Financial Results Revenue of $172.2 million driven by multiple energy storage deployments within the US market Announced five new Gravity Energy Storage System projects under the license and royalty agreement w

Exhibit 99.1 Energy Vault Reports Third Quarter 2023 Financial Results Revenue of $172.2 million driven by multiple energy storage deployments within the US market Announced five new Gravity Energy Storage System projects under the license and royalty agreement with Atlas Renewables totaling 1.2 GWh as the first 100 MWh system nears completion outside Shanghai Project Awards increased by 5.5 GWh,

November 7, 2023 8-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): November 7, 2023 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commi

November 7, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x 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 o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file numbe

August 8, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x 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 o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001

August 8, 2023 8-K

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 8, 2023 Energy Vault Holdi

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 8, 2023 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commiss

August 8, 2023 EX-99.1

Energy Vault Reports Second Quarter 2023 Earnings Results Revenue of $39.7 million reflecting 247% q/q sequential growth while executing to customer delivery expectations across all projects. GAAP gross margin of 9.9%, or $3.9 million, driven by batt

Exhibit 99.1 Energy Vault Reports Second Quarter 2023 Earnings Results Revenue of $39.7 million reflecting 247% q/q sequential growth while executing to customer delivery expectations across all projects. GAAP gross margin of 9.9%, or $3.9 million, driven by battery energy storage deployments during the quarter; YTD 2023 GAAP gross margin of 12.5%. Improved adjusted EBITDA and net income reflectin

July 19, 2023 CORRESP

Energy Vault Holdings, Inc. 4360 Park Terrace Drive Suite 100 Westlake Village, California 91361

Energy Vault Holdings, Inc. 4360 Park Terrace Drive Suite 100 Westlake Village, California 91361 July 19, 2023 VIA EDGAR U.S. Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, D.C. 20549 Re: Energy Vault Holdings, Inc. Registration Statement on Form S-3 File No. 333-273089 To the addressees set forth above: Pursuant to Rule 461 of Regulation C of the

July 14, 2023 S-3/A

As filed with the Securities and Exchange Commission on July 14, 2023

As filed with the Securities and Exchange Commission on July 14, 2023 Registration No.

June 30, 2023 S-3

As filed with the Securities and Exchange Commission on June 30, 2023

As filed with the Securities and Exchange Commission on June 30, 2023 Registration No.

June 30, 2023 EX-25.1

Statement of Eligibility on Form T-1 under the Trust Indenture Act of 1939, as amended, of Wilmington Trust, National Association, as trustee under the indenture filed as Exhibit 4.3 above

Exhibit 25.1 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 o Check if an Application to Determine Eligibility of a Trustee Pursuant to Section 305(b)(2) WILMINGTON TRUST, NATIONAL ASSOCIATION (Exact name of trustee as specified in its charter) 16-1486454 (I.R.S. employer identification no.) 1100 North Market Street Wilmington, DE 19890-0001 (Address of principal

June 30, 2023 EX-4.3

Form of Indenture

Exhibit 4.3 ENERGY VAULT HOLDINGS, INC. INDENTURE Dated as of , 20 Wilmington Trust, National Association Trustee TABLE OF CONTENTS Page ARTICLE I. DEFINITIONS AND INCORPORATION BY REFERENCE 1 Section 1.1. Definitions 1 Section 1.2. Other Definitions 4 Section 1.3. Incorporation by Reference of Trust Indenture Act 4 Section 1.4. Rules of Construction 5 ARTICLE II. THE SECURITIES 5 Section 2.1. Iss

June 30, 2023 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-3 (Form Type) Energy Vault Holdings, Inc.

June 15, 2023 8-K

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 14, 2023 Energy Vault Holdin

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 14, 2023 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commissi

June 5, 2023 POS AM

As filed with the Securities and Exchange Commission on June 2, 2023

As filed with the Securities and Exchange Commission on June 2, 2023 Registration No.

June 5, 2023 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Post-Effective Amendment No. 3 to Form S-1 on Form S-3 Energy Vault Holdings, Inc. Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered (1) Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Registered Securities Fees Previously Paid (2) Equity Common Stock,

June 2, 2023 CORRESP

* * * *

555 Eleventh Street, N.W., Suite 1000 Washington, D.C. 20004-1304 Tel: +1.202.637.2200 Fax: +1.202.637.2201 www.lw.com FIRM / AFFILIATE OFFICES Austin Milan Beijing Munich Boston New York Brussels Orange County Century City Paris Chicago Riyadh Dubai San Diego June 2, 2023 Düsseldorf San Francisco Frankfurt Seoul Via EDGAR Hamburg Shanghai Hong Kong Silicon Valley Securities and Exchange Commissio

May 31, 2023 LETTER

LETTER

United States securities and exchange commission logo May 31, 2023 Robert Piconi Chief Executive Officer Energy Vault Holdings, Inc.

May 26, 2023 8-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 8-K/A 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, 2023

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 8-K/A 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, 2023 Energy Vault Holdings, Inc.

May 25, 2023 8-K

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, 2023 Energy Vault Holding

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, 2023 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commissio

May 22, 2023 POS AM

As filed with the Securities and Exchange Commission on May 19, 2023

As filed with the Securities and Exchange Commission on May 19, 2023 Registration No.

May 19, 2023 CORRESP

* * *  *

555 Eleventh Street, N.W., Suite 1000 Washington, D.C. 20004-1304 Tel: +1.202.637.2200 Fax: +1.202.637.2201 www.lw.com FIRM / AFFILIATE OFFICES Austin Milan Beijing Munich Boston New York Brussels Orange County Century City Paris Chicago Riyadh May 19, 2023 Dubai San Diego Düsseldorf San Francisco Frankfurt Seoul Via EDGAR Hamburg Shanghai Hong Kong Silicon Valley Securities and Exchange Commissio

May 10, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x 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 o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 00

May 10, 2023 EX-10.2

Addendum to the Employment Agreement, dated May 5, 2023 between Energy Vault SA and Josh McMorrow (incorporated by reference to Exhibit 10.2 to Energy Vault Holdings, Inc.’s Form 10-Q (File No. 001-39982), filed with the SEC on May 10, 2023).

a102addendumagreeementjo Energy Vault SA – Via Cantonale 19 – 6900 Lugano – Switzerland Iscr.

May 10, 2023 EX-10.1

Letter agreement, dated May 5, 2023, by and between Energy Vault Holdings, Inc. and Josh McMorrow (incorporated by reference to Exhibit 10.1 to Energy Vault Holdings, Inc.’s Form 10-Q (File No. 001-39982), filed with the SEC on May 10, 2023).

a101joshmcmorrowsidelet 1 From: Energy Vault Holdings, Inc 4360 Park Terrace Drive, Suite 100 Westlake Village California 91361 United States (the “Company”) To: Josh McMorrow Fasanenstraße 65 10719 Berlin Germany (the “Employee”) 05 May 2023 Treatment of Outstanding Equity Incentive Awards 1.

May 10, 2023 LETTER

LETTER

United States securities and exchange commission logo May 10, 2023 Robert Piconi Chief Executive Officer Energy Vault Holdings, Inc.

May 9, 2023 8-K

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 9, 2023 Energy Vault Holdings

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 9, 2023 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commission

May 9, 2023 EX-99.1

Energy Vault Reports First Quarter 2023 Earnings Results New project awards increased by ~ $1 billion (2.8 GWh), of which ~ $725 million (2 GWh) were gravity EVx systems Recognized revenue of $11.4 million, in-line with expectations, and driven by co

Exhibit 99.1 Energy Vault Reports First Quarter 2023 Earnings Results New project awards increased by ~ $1 billion (2.8 GWh), of which ~ $725 million (2 GWh) were gravity EVx systems Recognized revenue of $11.4 million, in-line with expectations, and driven by construction progress of US-based BESS systems GAAP gross margin of 21.2%, or $2.4 million, driven by the Company’s BESS project activity d

May 8, 2023 POS AM

As filed with the Securities and Exchange Commission on May 5, 2023

As filed with the Securities and Exchange Commission on May 5, 2023 Registration No.

May 8, 2023 EX-24.1

Power of Attorney by Theresa Fariello and powers of attorney included on the signature page to the initial filing of the registration statement.

Exhibit 24.1 POWER OF ATTORNEY KNOW ALL PERSONS BY THESE PRESENTS that each person whose signature appears below constitutes and appoints Robert Piconi, his or her true and lawful attorneys-in-fact and agents, each with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any and all amendments, including post- ef

April 17, 2023 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) 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 (Rule 14a-101) 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 (

April 17, 2023 ARS

ARS

Dfasdfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffasgasgaggagagaegaergaegaegaegaegaegaegae gaegaegaegaegaegaegaegaegaegaegaegaergeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee Earggg

April 13, 2023 EX-10.14

Non-Employee Director Compensation Policy

Exhibit 10.14 Energy Vault Holdings, Inc. Compensation Program for Non-Executive Directors (as amended and restated, effective April 10, 2023) Non-employee members of the Board of Directors (“Board”) of Energy Vault Holdings, Inc. (the “Company”) shall receive cash and equity compensation as set forth in this Non-Executive Director Compensation Program (this “Program”). The cash and equity compens

April 13, 2023 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) x 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 o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-399

April 13, 2023 424B3

Energy Vault Holdings, Inc. Up to 101,567,843 Shares of Common Stock 5,166,666 Warrants to Purchase Common Stock

Filed pursuant to Rule 424(b)(3) Registration Statement No. 333-262720 Prospectus Supplement No. 14 (To Prospectus dated May 6, 2022) Energy Vault Holdings, Inc. Up to 101,567,843 Shares of Common Stock 5,166,666 Warrants to Purchase Common Stock This prospectus supplement supplements the prospectus dated May 6, 2022, as previously supplemented (the “Prospectus”), which forms a part of our registr

April 13, 2023 EX-21.1

List of Subsidiaries of Energy Vault Holdings, Inc.

Exhibit 21.1 List of 100% Owned Subsidiaries as of December 31, 2022 Name of Subsidiary Country of Incorporation Energy Vault, Inc. United States (Delaware) Calistoga Resiliency Center, LLC United States (Delaware) Energy Vault SA Switzerland Energy Vault Pty Ltd Australia

March 31, 2023 NT 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25 NOTIFICATION OF LATE FILING

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25 NOTIFICATION OF LATE FILING SEC File Number: 001-39982 CUSIP Number: 29280W109 (Check one): ☒ Form 10-K ☐ Form 20-F ☐ Form 11-K ☐ Form 10-Q ☐ Form 10-D ☐ Form N-SAR ☐ Form N-CSR For Period Ended: December 31, 2022 ☐ Transition Report on Form 10-K ☐ Transition Report on Form 20-F ☐ Transition Report on Form 11-K ☐ T

March 7, 2023 8-K

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 7, 2023 Energy Vault Holdin

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 7, 2023 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commissi

March 7, 2023 EX-99.1

Energy Vault Reports Fourth Quarter 2022 Earnings Results

Exhibit 99.1 Energy Vault Reports Fourth Quarter 2022 Earnings Results Financial Highlights •Fourth quarter 2022 revenue of $100.3 million, driven by the Company’s gravity energy storage territory expansion and execution ahead of schedule on a California 275MWh storage project with expected COD in July 2023. •Revenue for the year ending December 31, 2022 totaled $145.9 million, driven by the stron

March 7, 2023 424B3

Energy Vault Holdings, Inc. Up to 101,567,843 Shares of Common Stock 5,166,666 Warrants to Purchase Common Stock

Filed pursuant to Rule 424(b)(3) Registration No. 333-262720 PROSPECTUS SUPPLEMENT NO. 13 (to Prospectus dated May 6, 2022) Energy Vault Holdings, Inc. Up to 101,567,843 Shares of Common Stock 5,166,666 Warrants to Purchase Common Stock This prospectus supplement supplements the prospectus dated May 6, 2022, as previously supplemented (the “Prospectus”), which forms a part of our registration stat

February 14, 2023 SC 13G/A

NRGV / Energy Vault Holdings Inc / CITADEL ADVISORS LLC - SC 13G/A Passive Investment

SC 13G/A 1 tm233474-16sc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2 (Amendment No. 2)* ENERGY VAULT HOLDINGS, INC. (Name of Issuer) Common Stock, par value $0.0001 per share (the “Shar

February 13, 2023 SC 13G/A

NRGV / Energy Vault Holdings Inc / INTEGRATED CORE STRATEGIES (US) LLC Passive Investment

SC 13G/A 1 NRGVSC13GA22023.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (AMENDMENT NO. 2) ENERGY VAULT HOLDINGS, INC. (formerly Novus Capital Corporation II) (Name of Issuer) COMMON STOCK, PAR VALUE $0.0001 PER SHARE (Title of Class of Securities) 29280W109 (CUSIP Number) DECEMBER 31, 2022 (Date of event which re

February 10, 2023 8-K

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): February 10, 2023 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Comm

February 7, 2023 SC 13D/A

NRGV / Energy Vault Holdings Inc / Sloss Dakin Activist Investment

SC 13D/A 1 pml13d.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 1)* ENERGY VAULT HOLDINGS, INC. (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 29280W109 (CUSIP Number) Taylor Frankel c/o Prime Movers Lab P.O. Box 12829 Jackson, WY 83002 307-203-5036 (Name, Ad

February 6, 2023 SC 13G/A

NRGV / Energy Vault Holdings Inc / Weiss Asset Management LP Passive Investment

138,268,342 =============================================================================== UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.

January 24, 2023 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, 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): January 18, 2023 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commi

January 24, 2023 EX-99.1

ENERGY VAULT APPOINTS ENERGY AND TRANSPORTATION INDUSTRY EXECUTIVE THERESA FARIELLO TO ITS BOARD OF DIRECTORS Fariello brings decades of experience and leadership in government affairs at FORTUNE 500 companies, including United Airlines and ExxonMobi

ENERGY VAULT APPOINTS ENERGY AND TRANSPORTATION INDUSTRY EXECUTIVE THERESA FARIELLO TO ITS BOARD OF DIRECTORS Fariello brings decades of experience and leadership in government affairs at FORTUNE 500 companies, including United Airlines and ExxonMobil LUGANO, Switzerland & WESTLAKE VILLAGE, Calif.

January 18, 2023 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 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 18, 2023 Energy Vault Holdings, Inc.

January 18, 2023 424B3

Energy Vault Holdings, Inc. Up to 101,567,843 Shares of Common Stock 5,166,666 Warrants to Purchase Common Stock

Filed pursuant to Rule 424(b)(3) Registration Statement No. 333-262720 Prospectus Supplement No. 12 (To Prospectus dated May 6, 2022) Energy Vault Holdings, Inc. Up to 101,567,843 Shares of Common Stock 5,166,666 Warrants to Purchase Common Stock This prospectus supplement supplements the prospectus dated May 6, 2022, as previously supplemented (the “Prospectus”), which forms a part of our registr

January 18, 2023 EX-99.1

Energy Vault Updates Fourth Quarter and Full Year 2022 Expected Revenue Results Revises full year 2022 revenue range to $142 – $152 million from previous $75-100 million Significant fourth quarter over-performance driven by U.S. energy storage projec

Exhibit 99.1 Energy Vault Updates Fourth Quarter and Full Year 2022 Expected Revenue Results Revises full year 2022 revenue range to $142 – $152 million from previous $75-100 million Significant fourth quarter over-performance driven by U.S. energy storage project execution and global gravity storage territory expansions Updated 2023 outlook to be provided concurrent with upcoming earnings results

December 22, 2022 8-K/A

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 8-K/A 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 20, 2022 Energy Vault Holdings, Inc.

December 22, 2022 424B3

Energy Vault Holdings, Inc. Up to 101,567,843 Shares of Common Stock 5,166,666 Warrants to Purchase Common Stock

424B3 1 tm2233275d1424b3.htm 424B3 Filed pursuant to Rule 424(b)(3) Registration Statement No. 333-262720 Prospectus Supplement No. 11 (To Prospectus dated May 6, 2022) Energy Vault Holdings, Inc. Up to 101,567,843 Shares of Common Stock 5,166,666 Warrants to Purchase Common Stock This prospectus supplement supplements the prospectus dated May 6, 2022, as previously supplemented (the “Prospectus”)

December 20, 2022 424B3

Energy Vault Holdings, Inc. Up to 101,567,843 Shares of Common Stock 5,166,666 Warrants to Purchase Common Stock

Filed pursuant to Rule 424(b)(3) Registration Statement No. 333-262720 Prospectus Supplement No. 10 (To Prospectus dated May 6, 2022) Energy Vault Holdings, Inc. Up to 101,567,843 Shares of Common Stock 5,166,666 Warrants to Purchase Common Stock This prospectus supplement supplements the prospectus dated May 6, 2022, as previously supplemented (the “Prospectus”), which forms a part of our registr

December 20, 2022 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 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 20, 2022 Energy Vault Holdings, Inc.

December 9, 2022 S-8

As filed with the Securities and Exchange Commission on December 9, 2022

As filed with the Securities and Exchange Commission on December 9, 2022 Registration No.

December 9, 2022 EX-FILING FEES

Calculation of Filing Fee Table

US-DOCS\137129942.5 Exhibit 107.1 Calculation of Filing Fee Tables Form S-8 (Form Type) Energy Vault Holdings, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered (1) Proposed Maximum Offering Price Per Share (2) Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee

November 14, 2022 EX-10.7

Form of Restricted Stock Unit Award Grant Notice and Restricted Stock Unit Award Agreement under the 2022 Employment Inducement Award Plan

Exhibit 10.7 US-DOCS\137016642.2 ENERGY VAULT HOLDINGS, INC. 2022 EMPLOYMENT INDUCEMENT AWARD PLAN NOTICE OF RESTRICTED STOCK UNIT AWARD You have been granted Restricted Stock Units (?RSUs?), each representing the right to receive one share of the Common Stock of Energy Vault Holdings, Inc. (the ?Company?) on the following terms and conditions: Name of Recipient: ?Name? Total Number of RSUs Grante

November 14, 2022 EX-99.1

Energy Vault Reports Third Quarter 2022 Earnings Results

Exhibit 99.1 Energy Vault Reports Third Quarter 2022 Earnings Results ?Third quarter 2022 revenue of $1.7 million, driven by revenue from the energy storage projects with Jupiter Power in Texas and California. ?Revenue for the first nine months ending September 30, 2022, totaled $45.6 million, driven mainly by the gravity energy storage licensing revenue with Atlas Renewable. ?Third quarter GAAP l

November 14, 2022 EX-10.2

Offer Letter, dated November 14, 2022, by and between Energy Vault Holdings, Inc. and Jan Kees Van Gaalen

November 14, 2022 Johannes Cornelis Maria van Gaalen 5244 Alton Rd. Miami Beach FL 33410 [email protected] Re: Offer and Terms of Employment Dear Johannes, It gives me great pleasure to offer you the position of Chief Financial Officer for Energy Vault Holdings, Inc. (the ?Company?). If you accept this offer, the terms and conditions of this offer letter agreement (the ?Agreement?), in addit

November 14, 2022 424B3

Energy Vault Holdings, Inc. Up to 101,567,843 Shares of Common Stock 5,166,666 Warrants to Purchase Common Stock

424B3 1 prospectusupdateno9q32022.htm 424B3 Filed pursuant to Rule 424(b)(3) Registration No. 333-262720 PROSPECTUS SUPPLEMENT NO. 9 (to Prospectus dated May 6, 2022) Energy Vault Holdings, Inc. Up to 101,567,843 Shares of Common Stock 5,166,666 Warrants to Purchase Common Stock This prospectus supplement supplements the prospectus dated May 6, 2022, as previously supplemented (the “Prospectus”),

November 14, 2022 EX-10.3

Offer Letter, dated November 10, 2022, by and between Energy Vault Holdings, Inc. and Energy Terruzzin

EMPLOYMENT AGREEMENT between Energy Vault, Inc. and Marco Terruzzin November 10, 2022, is made between Energy Vault, and Marco Terruzzin RECITALS (A) The Company and Executive are parties to that certain Offer Letter, dated as of September 17, 2019, as (B) It is the desire of the Company to continue to assure itself of the services of Executive on the terms set forth in this Agreement effective as

November 14, 2022 8-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): November 14, 2022 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Comm

November 14, 2022 EX-10.9

Form of Restricted Stock Unit Award Grant Notice and Restricted Stock Unit Award Agreement under the 2022 Equity Incentive Plan

Exhibit 10.9 US-DOCS\137263878.1 ENERGY VAULT HOLDINGS, INC. 2022 EQUITY INCENTIVE PLAN NOTICE OF RESTRICTED STOCK UNIT AWARD You have been granted Restricted Stock Units (?RSUs?), each representing the right to receive one share of the Common Stock of Energy Vault Holdings, Inc. (the ?Company?) on the following terms and conditions: Name of Recipient: [] Total Number of RSUs Granted: [] Date of G

November 14, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x 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 o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file numbe

November 14, 2022 EX-10.5

2022 Employment Inducement Award Plan

Exhibit 10.5 US-DOCS\136942439.4 ENERGY VAULT HOLDINGS, INC. 2022 EMPLOYMENT INDUCEMENT AWARD PLAN (AS ADOPTED ON NOVEMBER 14, 2022) US-DOCS\136942439.4 ENERGY VAULT HOLDINGS, INC. 2022 EMPLOYMENT INDUCEMENT AWARD PLAN ARTICLE 1. INTRODUCTION. The purpose of the Plan is to promote the long-term success of the Company and the creation of stockholder value by (a) encouraging Eligible Individuals to

November 14, 2022 EX-10.6

Form of Stock Option Grant Notice and Stock Option Agreement under the 2022 Employment Inducement Award Plan

Exhibit 10.6 US-DOCS\137017117.2 ENERGY VAULT HOLDINGS, INC. 2022 EMPLOYMENT INDUCEMENT AWARD PLAN NOTICE OF STOCK OPTION GRANT You have been granted the following option to purchase shares of the Common Stock of Energy Vault Holdings, Inc. (the ?Company?) on the terms and conditions set out below: Name of Optionee: ?Name? Total Number of Shares: ?TotalShares? Type of Option (U.S. Tax Status): Non

November 14, 2022 EX-10.8

Form of Stock Option Grant Notice and Stock Option Agreement under the 2022 Equity Incentive Plan

Exhibit 10.8 US-DOCS\137263876.1 ENERGY VAULT HOLDINGS, INC. 2022 EQUITY INCENTIVE PLAN NOTICE OF STOCK OPTION GRANT You have been granted the following option to purchase shares of the Common Stock of Energy Vault Holdings, Inc. (the ?Company?) on the terms and conditions set out below: Name of Optionee: [] Total Number of Shares: [] Type of Option (U.S. Tax Status): [Incentive Stock Option][Nons

November 14, 2022 EX-10.1

Offer Letter, dated November 11, 2022, by and between Energy Vault Holdings, Inc. and Robert Piconi

US-DOCS\135566613.6 EMPLOYMENT AGREEMENT by and among Energy Vault SA, Energy Vault Holdings, Inc. and Robert A. Piconi This EMPLOYMENT AGREEMENT (this ?Agreement?), dated as of November 11, 2022, is made by and among Energy Vault SA (the ?Company?), Energy Vault Holdings, Inc. (?Parent?)(but solely with respect to Sections 1, 4, 11, 12(c)(iv), 12(c)(v) and 12(d)(iii)) and Robert A. Piconi (the ?E

November 8, 2022 8-K

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 3, 2022 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commi

November 8, 2022 424B3

Energy Vault Holdings, Inc. Up to 101,567,843 Shares of Common Stock 5,166,666 Warrants to Purchase Common Stock

Filed pursuant to Rule 424(b)(3) Registration No. 333-262720 PROSPECTUS SUPPLEMENT NO. 8 (to Prospectus dated May 6, 2022) Energy Vault Holdings, Inc. Up to 101,567,843 Shares of Common Stock 5,166,666 Warrants to Purchase Common Stock This prospectus supplement supplements the prospectus dated May 6, 2022, as previously supplemented (the ?Prospectus?), which forms a part of our registration state

November 2, 2022 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) 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 (Rule 14a-101) 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 (

November 2, 2022 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION 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 (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, For Use of the Commission only (a

October 14, 2022 8-K

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): October 14, 2022 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commi

September 22, 2022 8-K

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): September 22, 2022 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Com

September 22, 2022 EX-99.1

© ENERGY VAULT – ALL RIGHTS RESERVED Energy Vault The Preeminent Energy Storage Company Investor Presentation | September 2022 Exhibit 99.1 © ENERGY VAULT – ALL RIGHTS RESERVED Enabling a Renewable World 2 Disclaimer Forward-Looking Statements This p

? ENERGY VAULT ? ALL RIGHTS RESERVED Energy Vault The Preeminent Energy Storage Company Investor Presentation | September 2022 Exhibit 99.

September 2, 2022 SC 13D

NRGV / Energy Vault Holdings Inc / Sloss Dakin Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No.

August 18, 2022 SC 13D/A

NRGV / Energy Vault Holdings Inc / Helena Special Investments LLC - AMENDMENT NO. 2 TO SCHEDULE 13D Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 2)* ENERGY VAULT HOLDINGS, INC. (Name of Issuer) CLASS A COMMON STOCK, PAR VALUE $0.0001 PER SHARE (Title of Class of Securities) 29280W 109 (CUSIP Number) Matthew L. Saunders c/o Helena Special Investments LLC 515 S Flower Street, Suite 5100 Los Angeles, CA

August 17, 2022 EX-99.25

EX-99.25

NOTIFICATION OF THE REMOVAL FROM LISTING AND REGISTRATION OF THE STATED WARRANTS The New York Stock Exchange ("NYSE" or the "Exchange") hereby notifies the Securities and Exchange Commission (the "Commission") of its intention to remove the entire class of redeemable Warrants, each warrant exercisable for one share of common stock at an exercise price of $11.

August 8, 2022 8-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): August 8, 2022 Energy Vault Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39982 85-3230987 (State or other jurisdiction of incorporation) (Commiss

August 8, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x 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 o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001

August 8, 2022 EX-99.1

Energy Vault Reports Second Quarter 2022 Earnings Results

Exhibit 99.1 Energy Vault Reports Second Quarter 2022 Earnings Results ?Second quarter 2022 revenue of $1.0 million, driven by construction support services for the 100 megawatt hour (MWh) project in Rudong, China ?Revenue for the first half of 2022 totaled $43.9 million, driven by a portion of the $50 million licensing and royalty agreement with Atlas Renewable received in the first quarter of 20

August 8, 2022 424B3

Energy Vault Holdings, Inc. Up to 111,151,176 Shares of Common Stock 5,166,666 Warrants to Purchase Common Stock

Table of Contents Filed pursuant to Rule 424(b)(3) Registration No. 333-262720 PROSPECTUS SUPPLEMENT NO. 7 (to Prospectus dated May 6, 2022) Energy Vault Holdings, Inc. Up to 111,151,176 Shares of Common Stock 5,166,666 Warrants to Purchase Common Stock This prospectus supplement supplements the prospectus dated May 6, 2022, as previously supplemented (the ?Prospectus?), which forms a part of our

August 4, 2022 424B3

Energy Vault Holdings, Inc. Up to 111,151,176 Shares of Common Stock 5,166,666 Warrants to Purchase Common Stock

Filed pursuant to Rule 424(b)(3) Registration No. 333-262720 PROSPECTUS SUPPLEMENT NO. 6 (to Prospectus dated May 6, 2022) Energy Vault Holdings, Inc. Up to 111,151,176 Shares of Common Stock 5,166,666 Warrants to Purchase Common Stock This prospectus supplement supplements the prospectus dated May 6, 2022, as previously supplemented (the ?Prospectus?), which forms a part of our registration state

August 2, 2022 424B3

Energy Vault Holdings, Inc. Up to 111,151,176 Shares of Common Stock 5,166,666 Warrants to Purchase Common Stock

Filed pursuant to Rule 424(b)(3) Registration No. 333-262720 PROSPECTUS SUPPLEMENT NO. 5 (to Prospectus dated May 6, 2022) Energy Vault Holdings, Inc. Up to 111,151,176 Shares of Common Stock 5,166,666 Warrants to Purchase Common Stock This prospectus supplement supplements the prospectus dated May 6, 2022, as previously supplemented (the ?Prospectus?), which forms a part of our registration state

August 2, 2022 EX-99.1

Energy Vault Announces Completion of Redemption of Warrants

Exhibit 99.1 Energy Vault Announces Completion of Redemption of Warrants LUGANO, Switzerland & WESTLAKE VILLAGE, Calif., August 2, 2022 ? Energy Vault Holdings, Inc. (NYSE: NRGV, NRGV WS) (?Energy Vault? or the ?Company?), a leader in sustainable, grid-scale energy storage solutions, today announced the completion of the redemption of all outstanding public warrants (other than Private Placement W

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