PRLB / Proto Labs, Inc. - SEC-Einreichungen, Jahresbericht, Proxy Statement

PROTO LABS, INC. CONFLICT MINERALS REPORT For the reporting period from January 1, 2025 to December 31, 2025

Exhibit 1.01 PROTO LABS, INC. CONFLICT MINERALS REPORT For the reporting period from January 1, 2025 to December 31, 2025 This Conflict Minerals Report (this “Report”) of Proto Labs, Inc. (the “Company,” “we,” “us” or “our”) has been prepared pursuant to Rule 13p-1 and Form SD (the “Rule”) promulgated under the Securities Exchange Act of 1934, as amended, for the reporting period from January 1, 2

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT Proto Labs, Inc. (Exact name of the registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT Proto Labs, Inc. (Exact name of the registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 5540 Pioneer Creek Drive Maple Plain, Minnesota 55359 (Addres

AMENDED AND RESTATED PROTO LABS, INC. 2022 LONG-TERM INCENTIVE PLAN (As Amended May 19, 2026)

Exhibit 10.1 AMENDED AND RESTATED PROTO LABS, INC. 2022 LONG-TERM INCENTIVE PLAN (As Amended May 19, 2026) 1.General. (a) Purpose. The purpose of the Proto Labs, Inc. 2022 Long-Term Incentive Plan, as amended and restated (the “Plan”) is to help attract and retain the best available people for positions of responsibility with the Company, to provide additional incentives to them and align their in

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 19, 2026 Proto Labs, Inc. (Ex

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 19, 2026 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File Num

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 6, 2026 Proto Labs, Inc. (Exa

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 6, 2026 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File Numb

Protolabs Strengthens Executive Leadership Team with Appointment of Bernardo Parlange as Chief Commercial Officer Company also Announces Planned Retirement of Chief Operations Officer

Exhibit 99.1 Protolabs Strengthens Executive Leadership Team with Appointment of Bernardo Parlange as Chief Commercial Officer Company also Announces Planned Retirement of Chief Operations Officer MINNEAPOLIS, May 7, 2026 — Protolabs (NYSE: PRLB), the world’s leading provider of digital manufacturing services, today announced the appointment of Bernardo Parlange as Chief Commercial Officer (CCO),

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 1, 2026 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File Numb

Protolabs Reports Financial Results for the First Quarter of 2026 Record Quarterly Revenue of $139.3 Million, a 10.4% Increase Year-Over-Year GAAP Earnings Per Share of $0.33, Non-GAAP Earnings Per Share of $0.54

Exhibit 99.1 Protolabs Reports Financial Results for the First Quarter of 2026 Record Quarterly Revenue of $139.3 Million, a 10.4% Increase Year-Over-Year GAAP Earnings Per Share of $0.33, Non-GAAP Earnings Per Share of $0.54 MINNEAPOLIS – May 1, 2026 – Proto Labs, Inc. ("Protolabs" or the "Company") (NYSE: PRLB), the world’s leading provider of digital manufacturing services, today announced fina

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) þ 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: 0

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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) þ 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: 001-35435 Proto Labs, In

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. )

TABLE OF CONTENTS 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 þ Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14

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 þ Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) o Defin

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) þ 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: 001-35

SUBSIDIARIES OF THE REGISTRANT

Exhibit 21.1 SUBSIDIARIES OF THE REGISTRANT All of the Company’s subsidiaries listed below are wholly owned. Name Jurisdiction of Incorporation or Organization PL-US International LLC United States Hubs Manufacturing Inc. United States 3D Hubs Manufacturing LLC United States Proto Labs Ltd. United Kingdom PL International Holdings, UK, Ltd. United Kingdom PL Euro Services Limited United Kingdom Pr

Protolabs Annual Incentive Plan

Exhibit 10.37 Protolabs Annual Incentive Plan Overview: This Annual Incentive Plan (“AIP”) of Proto Labs, Inc. (the “Company”) is designed to motivate and reward employees for driving the achievement of the Company’s annual priorities and strategies associated with running and growing the business. Any payouts under the AIP are paid as cash bonuses based on achievement of specified performance met

PROTO LABS, INC. POWER OF ATTORNEY OF DIRECTOR AND/OR OFFICER

Exhibit 24.1 PROTO LABS, INC. POWER OF ATTORNEY OF DIRECTOR AND/OR OFFICER Each of the undersigned directors and/or officers of Proto Labs, Inc., a Minnesota corporation (the “Company”), does hereby make, constitute and appoint Suresh Krishna and Daniel Schumacher, and each of them, either of whom may act without the joinder of the other, the undersigned’s true and lawful attorney-in-fact and agen

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A Amendment No. 1 CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 6, 202

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A Amendment No. 1 CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 6, 2026 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation

Protolabs Reports Financial Results for the Fourth Quarter and Full Year 2025 Record Quarterly Revenue of $136.5 Million, a 12.1% Increase Year-Over-Year Record Annual Revenue of $533.1 Million, a 6.4% Increase Year-Over-Year

Exhibit 99.1 Protolabs Reports Financial Results for the Fourth Quarter and Full Year 2025 Record Quarterly Revenue of $136.5 Million, a 12.1% Increase Year-Over-Year Record Annual Revenue of $533.1 Million, a 6.4% Increase Year-Over-Year MINNEAPOLIS – February 6, 2026 – Proto Labs, Inc. ("Protolabs" or the "Company") (NYSE: PRLB), the world’s leading provider of digital manufacturing services, to

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 6, 2026 Proto Labs, Inc.

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 6, 2026 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File

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 31, 2025 Proto Labs, Inc.

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 31, 2025 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File

SEVERANCE AGREEMENT

Exhibit 10.1 SEVERANCE AGREEMENT This Severance Agreement (the “Agreement”) is entered into as of (the “Effective Date”) by and between Proto Labs, Inc., a Minnesota corporation (the “Company”), and (“Executive”), an individual residing in .1 Recitals A. Executive is employed by the Company and is party to an Employee Confidentiality, Intellectual Property Assignment Agreement and Non-Solicitation

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) þ 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

Protolabs Reports Financial Results for the Third Quarter of 2025 Record Quarterly Revenue of $135.4 Million, a 7.8% increase Year-Over-Year GAAP Earnings Per Share of $0.30, Non-GAAP Earnings Per Share of $0.47

Exhibit 99.1 Protolabs Reports Financial Results for the Third Quarter of 2025 Record Quarterly Revenue of $135.4 Million, a 7.8% increase Year-Over-Year GAAP Earnings Per Share of $0.30, Non-GAAP Earnings Per Share of $0.47 MINNEAPOLIS – October 31, 2025 – Proto Labs, Inc. ("Protolabs" or the "Company") (NYSE: PRLB), the world’s leading provider of digital manufacturing services, today announced

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 3, 2025 Proto Labs, Inc.

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 3, 2025 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File

Protolabs Appoints Marc Kermisch as New Chief Technology and AI Officer

Exhibit 99.1 Protolabs Appoints Marc Kermisch as New Chief Technology and AI Officer MINNEAPOLIS, MINN.—Oct. 3, 2025—Global digital manufacturing leader Protolabs (NYSE: PRLB) today announced Marc Kermisch as its new Chief Technology and AI Officer, effective Monday, Oct. 13, 2025. Kermisch will lead Protolabs’ global technology organization and succeeds previous CTO, Oleg Ryaboy, who has departed

Protolabs Reports Financial Results for the Second Quarter of 2025 Record Quarterly Revenue of $135.1 Million, a 7.5% increase Year-Over-Year GAAP Earnings Per Share of $0.18, Non-GAAP Earnings Per Share of $0.41

Exhibit 99.1 Protolabs Reports Financial Results for the Second Quarter of 2025 Record Quarterly Revenue of $135.1 Million, a 7.5% increase Year-Over-Year GAAP Earnings Per Share of $0.18, Non-GAAP Earnings Per Share of $0.41 MINNEAPOLIS – July 31, 2025 – Proto Labs, Inc. ("Protolabs" or the "Company") (NYSE: PRLB), the world’s leading provider of digital manufacturing services, today announced fi

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 31, 2025 Proto Labs, Inc. (E

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 31, 2025 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File Nu

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) þ 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: 00

Consulting Agreement, dated May 28, 2025, by and between Proto Labs, Inc. and Robert Bodor

Exhibit 10.2 Proto Labs 5540 Pioneer Creek Drive Maple Plain, MN 55359 May 28, 2025 Robert Bodor To his last known address on file with Proto Labs Dear Rob: We are pleased to extend an offer of a consulting arrangement between Proto Labs, Inc. (“Proto Labs”) and you (“Consultant” or “you”). If you accept the consulting arrangement described in this consulting letter agreement (this “Consulting Agr

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): May 24, 2025 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File Num

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Proto Labs, Inc. (Exact Name of Registrant as Specified in its Charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Proto Labs, Inc. (Exact Name of Registrant as Specified in its Charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.) 5540 Pioneer Creek Drive Maple Plain, Minnesota 55359 (Address of principal execu

Conflict Minerals Report as required by Items 1.01 and 1.02 of this Form SD.

Exhibit 1.01 Injection Molding Sheet Metal Fabrication CNC Machining 3D Printing PROTO LABS, INC. CONFLICT MINERALS REPORT For the reporting period from January 1, 2024 to December 31, 2024 This Conflict Minerals Report (this “Report”) of Proto Labs, Inc. (the “Company,” “we,” “us” or “our”) has been prepared pursuant to Rule 13p-1 and Form SD (the “Rule”) promulgated under the Securities Exchange

Filing Fee Table

Calculation of Filing Fee Tables S-8 Proto Labs 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, par value $0.

Performance Stock Unit Award Agreement – Revenue and TSR (Inducement Grant) between Proto Labs, Inc. and Suresh Krishna, dated May 23, 2025

Exhibit 10.2 PROTO LABS, INC. Performance Stock Unit Award Agreement – Revenue and TSR (Inducement Grant) Proto Labs, Inc. (the “Company”) hereby grants to you, the Participant named below, an award of Performance Stock Units (the “Units”). The terms and conditions of this Performance Stock Unit Award (this “Award”) are set forth in this Performance Stock Unit Award Agreement (Inducement Grant) (t

As filed with the Securities and Exchange Commission on May 27, 2025

As filed with the Securities and Exchange Commission on May 27, 2025 Registration No.

Performance Stock Unit Award Agreement – TSR (Inducement Grant) between Proto Labs, Inc. and Suresh Krishna, dated May 23, 2025

Exhibit 10.1 PROTO LABS, INC. Performance Stock Unit Award Agreement – TSR (Inducement Grant) Proto Labs, Inc. (the “Company”) hereby grants to you, the Participant named below, an award of Performance Stock Units (the “Units”). The terms and conditions of this Performance Stock Unit Award (this “Award”) are set forth in this Performance Stock Unit Award Agreement (Inducement Grant) (the “Agreemen

Filing Fee Table

Calculation of Filing Fee Tables S-8 Proto Labs 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, par value $0.

As filed with the Securities and Exchange Commission on May 27, 2025

As filed with the Securities and Exchange Commission on May 27, 2025 Registration No.

Executive Employment Agreement, dated May 20, 2025, by and between Proto Labs, Inc. and Suresh Krishna

Exhibit 10.1 PROTO LABS, INC. EXECUTIVE EMPLOYMENT AGREEMENT This Executive Employment Agreement (the “Agreement”) is entered into as of May 20, 2025 (the “Effective Date”) by and between Proto Labs, Inc., a Minnesota corporation (the “Company”), and Suresh Krishna (“Executive”), an individual residing in Minnesota. Recitals A.            The Company desires to employ Executive, and Executive desi

Protolabs Appoints Suresh Krishna as President and CEO Reaffirms Second Quarter 2025 Outlook

Exhibit 99.1 FOR IMMEDIATE RELEASE Protolabs Appoints Suresh Krishna as President and CEO Reaffirms Second Quarter 2025 Outlook MINNEAPOLIS – (BUSINESS WIRE) – May 21, 2025 – Proto Labs, Inc. ("Protolabs" or the "Company") (NYSE: PRLB), the world’s leading provider of digital manufacturing services, today announced its Board of Directors has appointed Suresh Krishna as President and Chief Executiv

Consulting Agreement, dated May 20, 2025, by and between Proto Labs, Inc. and Robert Bodor

Exhibit 10.3 Proto Labs, Inc. 5540 Pioneer Creek Drive Maple Plain, MN 55359 May 20, 2025 Robert Bodor To his last known address on file with Proto Labs Dear Rob: We are pleased to extend an offer of a short-term consulting arrangement between Proto Labs, Inc. (“Proto Labs”) and you (“Consultant” or “you”) for the period from today through May 25, 2025 (the “Term”). The following are the terms of

Amended and Restated Proto Labs, Inc. 2022 Long-Term Incentive Plan, as amended May 20, 2025

Exhibit 10.4 AMENDED AND RESTATED PROTO LABS, INC. 2022 LONG-TERM INCENTIVE PLAN (As Amended May 20, 2025) 1.      General. (a) Purpose. The purpose of the Proto Labs, Inc. 2022 Long-Term Incentive Plan, as amended and restated (the “Plan”) is to help attract and retain the best available people for positions of responsibility with the Company, to provide additional incentives to them and align th

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 20, 2025 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File Num

Protolabs Reports Financial Results for the First Quarter of 2025 Total Revenue of $126.2 Million GAAP Earnings Per Share of $0.15, Non-GAAP Earnings Per Share of $0.33

Exhibit 99.1 Protolabs Reports Financial Results for the First Quarter of 2025 Total Revenue of $126.2 Million GAAP Earnings Per Share of $0.15, Non-GAAP Earnings Per Share of $0.33 MINNEAPOLIS – May 2, 2025 – Proto Labs, Inc. ("Protolabs" or the "Company") (NYSE: PRLB), the world’s leading provider of digital manufacturing services, today announced financial results for the first quarter ended Ma

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) þ 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: 0

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 2, 2025 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File Numb

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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) þ 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: 001-35435 Proto Labs, In

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. )

TABLE OF CONTENTS 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 þ Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14

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 þ Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) o Defin

Subsidiaries of Proto Labs, Inc.

Exhibit 21.1 SUBSIDIARIES OF THE REGISTRANT All of the Company’s subsidiaries listed below are wholly owned. Name Jurisdiction of Incorporation or Organization PL-US International LLC United States Hubs Manufacturing Inc. United States 3D Hubs Manufacturing LLC United States Proto Labs Ltd. United Kingdom PL International Holdings, UK, Ltd. United Kingdom PL Euro Services Limited United Kingdom Pr

Proto Labs, Inc. Supplement to Insider Trading Policy

Exhibit 19.2 PROTO LABS, INC. SUPPLEMENT TO INSIDER TRADING POLICY Supplemental Insider Trading Restrictions for Corporate Insiders Purpose Proto Labs, Inc.’s (the “Company”) Insider Trading Policy addresses securities trading restrictions affecting all employees of the Company. This document (the “Policy Supplement”) supplements the Insider Trading Policy with respect to members of the Company’s

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) þ 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: 001-35

Powers of Attorney

Exhibit 24.1 PROTO LABS, INC. POWER OF ATTORNEY OF DIRECTOR AND/OR OFFICER Each of the undersigned directors and/or officers of Proto Labs, Inc., a Minnesota corporation (the “Company”), does hereby make, constitute and appoint Robert Bodor and Daniel Schumacher, and each of them, either of whom may act without the joinder of the other, the undersigned’s true and lawful attorney-in-fact and agent,

Proto Labs, Inc. Insider Trading Policy

Exhibit 19.1 PROTO LABS, INC. INSIDER TRADING POLICY and Guidelines with Respect to Certain Transactions in Company Securities Background Proto Labs, Inc. (the “Company”) and its directors, officers and employees must act in a manner that does not misuse material financial or other information that has not been publicly disclosed. Failure to do so runs contrary to our values and integrity. In the

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 7, 2025 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File

Protolabs Reports Financial Results for the Fourth Quarter and Full Year 2024 2024 Revenue of $501 Million 2024 GAAP Earnings Per Share of $0.66, Non-GAAP Earnings Per Share of $1.63

Exhibit 99.1 Protolabs Reports Financial Results for the Fourth Quarter and Full Year 2024 2024 Revenue of $501 Million 2024 GAAP Earnings Per Share of $0.66, Non-GAAP Earnings Per Share of $1.63 MINNEAPOLIS – February 7, 2025 – Proto Labs, Inc. ("Protolabs" or the "Company") (NYSE: PRLB), the world’s leading provider of digital manufacturing services, today announced financial results for the fou

LETTER

December 12, 2024 Daniel Schumacher Chief Financial Officer Proto Labs Inc 5540 Pioneer Creek Drive Maple Plain, Minnesota 55359 Re: Proto Labs Inc Form 10-K for the Year Ended December 31, 2023 Form 8-K furnished November 1, 2024 File No.

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December 11, 2024 Via EDGAR Securities and Exchange Commission Division of Corporation Finance - Office of Manufacturing 100 F Street, N.

LETTER

December 3, 2024 Daniel Schumacher Chief Financial Officer Proto Labs Inc 5540 Pioneer Creek Drive Maple Plain, Minnesota 55359 Re: Proto Labs Inc Form 10-K for the Year Ended December 31, 2023 Form 8-K furnished November 1, 2024 File No.

PRLB / Proto Labs, Inc. / BlackRock, Inc. Passive Investment

SC 13G/A 1 us7437131094110824.txt us7437131094110824.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 5) PROTO LABS INC - (Name of Issuer) Common Stock - (Title of Class of Securities) 743713109 - (CUSIP Number) September 30, 2024 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to

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) þ 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

Protolabs Reports Financial Results for the Third Quarter of 2024 Total Revenue of $126 Million GAAP Earnings Per Share of $0.29, Non-GAAP Earnings Per Share of $0.47

Exhibit 99.1 Protolabs Reports Financial Results for the Third Quarter of 2024 Total Revenue of $126 Million GAAP Earnings Per Share of $0.29, Non-GAAP Earnings Per Share of $0.47 MINNEAPOLIS – November 1, 2024 – Proto Labs, Inc. ("Protolabs" or the "Company") (NYSE: PRLB), the world’s leading provider of digital manufacturing services, today announced financial results for the third quarter ended

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 1, 2024 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File

Material Impairments, Costs Associated with Exit or Disposal Activities

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 21, 2024 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File

PRLB / Proto Labs, Inc. / BlackRock, Inc. Passive Investment

SC 13G/A 1 us7437131094101824.txt us7437131094101824.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 5) PROTO LABS INC - (Name of Issuer) Common Stock - (Title of Class of Securities) 743713109 - (CUSIP Number) September 30, 2024 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to

Settlement Agreement, fully executed on October 1, 2024 between Proto Labs, Inc., Proto Labs Germany GmbH and Bjoern Klaas

Zwischen Between Proto Labs, Inc. 5540 Pioneer Creek Drive Maple Plain, MN 55359 USA - im Folgenden „die US Gesellschaft“ genannt - Proto Labs, Inc. 5540 Pioneer Creek Drive Maple Plain, MN 55359 USA - hereinafter referred to as “US Company” - und and Proto Labs Germany GmbH Hermann-Oberth-Straße 21 85640 Putzbrunn Deutschland - im Folgenden „Proto Labs Germany GmbH“ genannt – Proto Labs Germany G

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): October 1, 2024 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File

Form of Restricted Stock Unit Agreement Grant Notice under the Amended and Restated 2022 Long-Term Incentive Plan (Non-Employee Director).*

Exhibit 10.2 PROTO LABS, INC. AMENDED AND RESTATED 2022 LONG-TERM INCENTIVE PLAN Restricted Stock Unit Agreement Grant Notice (Non-Employee Director) Proto Labs, Inc. (the “Company”), pursuant to its Amended and Restated 2022 Long-Term Incentive Plan (the “Plan”), hereby grants to you, the Participant named below, the number of Restricted Stock Units (the “Units”) shown in the table below. This aw

Form of Deferred Stock Unit Agreement Grant Notice under the Amended and Restated 2022 Long-Term Incentive Plan (Non-Employee Director)

Exhibit 10.3 PROTO LABS, INC. AMENDED AND RESTATED 2022 LONG-TERM INCENTIVE PLAN Deferred Stock Unit Agreement Grant Notice (Non-Employee Director) Proto Labs, Inc. (the “Company”), pursuant to its Amended and Restated 2022 Long-Term Incentive Plan (the “Plan”), hereby grants to you, the Participant named below, the number of Deferred Stock Units (the “Units”) shown in the table below. This award

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) þ 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: 00

Protolabs Reports Financial Results for the Second Quarter of 2024 Total Revenue of $126 Million GAAP Earnings Per Share of $0.18, Non-GAAP Earnings Per Share of $0.38

Exhibit 99.1 Protolabs Reports Financial Results for the Second Quarter of 2024 Total Revenue of $126 Million GAAP Earnings Per Share of $0.18, Non-GAAP Earnings Per Share of $0.38 MINNEAPOLIS – August 2, 2024 – Proto Labs, Inc. ("Protolabs" or the "Company") (NYSE: PRLB), the world’s leading provider of digital manufacturing services, today announced financial results for the second quarter ended

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 2, 2024 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File N

Filing Fee Table

Exhibit 107.1 Calculation of Filing Fee Tables Form S-8 (Form Type) Proto Labs, 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)(2) Proposed Maximum Offering Price Per Unit(3) Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Equity Common Stock, par value

As filed with the Securities and Exchange Commission on August 2, 2024

As filed with the Securities and Exchange Commission on August 2, 2024 Registration No.

Amended and Restated Proto Labs, Inc. 2022 Long-Term Incentive Plan (as amended on May 23, 2024).*

EX-10.1 2 prlb-20240630xexx101.htm EX-10.1 Exhibit 10.1 AMENDED AND RESTATED PROTO LABS, INC. 2022 LONG-TERM INCENTIVE PLAN 1.General. (a) Purpose. The purpose of the Proto Labs, Inc. 2022 Long-Term Incentive Plan, as amended and restated (the “Plan”) is to help attract and retain the best available people for positions of responsibility with the Company, to provide additional incentives to them a

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 22, 2024 Proto Labs, Inc. (E

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 22, 2024 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File Nu

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Proto Labs, Inc. (Exact Name of Registrant as Specified in its Charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Proto Labs, Inc. (Exact Name of Registrant as Specified in its Charter) Minnesota 001-35435 (State or other jurisdiction of incorporation) (Commission File Number) 5540 Pioneer Creek Drive Maple Plain, Minnesota 55359 (Address of principal executive offices) (Zip Code) Daniel Schumacher (7

Conflict Minerals Report as required by Items 1.01 and 1.02 of this Form SD.

Exhibit 1.01 Injection Molding Sheet Metal Fabrication CNC Machining 3D Printing PROTO LABS, INC. CONFLICT MINERALS REPORT For the reporting period from January 1, 2023 to December 31, 2023 This Conflict Minerals Report (this “Report”) of Proto Labs, Inc. (the “Company,” “we,” “us” or “our”) has been prepared pursuant to Rule 13p-1 and Form SD (the “Rule”) promulgated under the Securities Exchange

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, 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 23, 2024 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File Num

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 3, 2024 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File Numb

Protolabs Reports Financial Results for the First Quarter of 2024 Total Revenue of $128 Million; Protolabs Network Revenue up 39% YoY to $24 Million GAAP Earnings Per Share of $0.20, Non-GAAP Earnings Per Share of $0.40

Exhibit 99.1 Protolabs Reports Financial Results for the First Quarter of 2024 Total Revenue of $128 Million; Protolabs Network Revenue up 39% YoY to $24 Million GAAP Earnings Per Share of $0.20, Non-GAAP Earnings Per Share of $0.40 MINNEAPOLIS – May 3, 2024 – Proto Labs, Inc. ("Protolabs" or the "Company") (NYSE: PRLB), the world’s leading provider of digital manufacturing services, today announc

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) þ 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: 0

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. )

TABLE OF CONTENTS 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 þ Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14

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 þ Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) o Defin

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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) þ 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: 001-35

Powers of Attorney

Exhibit 24.1 PROTO LABS, INC. POWER OF ATTORNEY OF DIRECTOR AND/OR OFFICER Each of the undersigned directors and/or officers of Proto Labs, Inc., a Minnesota corporation (the “Company”), does hereby make, constitute and appoint Robert Bodor and Daniel Schumacher, and each of them, either of whom may act without the joinder of the other, the undersigned’s true and lawful attorney-in-fact and agent,

Subsidiaries of Proto Labs, Inc.

Exhibit 21.1 SUBSIDIARIES OF THE REGISTRANT All of the Company’s subsidiaries listed below are wholly owned. Name Jurisdiction of Incorporation or Organization PL-US International LLC United States Hubs Manufacturing Inc. United States 3D Hubs Manufacturing LLC United States Proto Labs Ltd. United Kingdom PL International Holdings, UK, Ltd. United Kingdom PL Euro Services Limited United Kingdom Pr

(incorporated by reference to Exhibit 97 to the Company's Form 10-K

Exhibit 97 PROTO LABS, INC. REQUIRED COMPENSATION RECOVERY POLICY Adopted November 14, 2023 Policy The Compensation and Talent Committee of the Board of Directors (the “Committee”) of Proto Labs, Inc. has adopted this Required Compensation Recovery Policy (this “Policy”) pursuant to Rule 10D-1 of the Securities and Exchange Act of 1934, as amended (the “Exchange Act”), the Securities and Exchange

PRLB / Proto Labs, Inc. / DISCIPLINED GROWTH INVESTORS INC /MN - FORM 13G/A PRLB 12-31-23 Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No: 2 ) PROTO LABS INC - (Name of Issuer) Common Stock - (Title of Class of Securities) 743713109 - (CUSIP Number) December 31, 2023 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is

PRLB / Proto Labs, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv01750-protolabsinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 11)* Name of issuer: Proto Labs Inc Title of Class of Securities: Common Stock CUSIP Number: 743713109 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designate the r

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 9, 2024 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File

Protolabs Reports Financial Results for the Fourth Quarter and Full Year 2023 Revenue of $125 Million in the Fourth Quarter of 2023 Record Annual Revenue of $504 Million in 2023

Exhibit 99.1 Protolabs Reports Financial Results for the Fourth Quarter and Full Year 2023 Revenue of $125 Million in the Fourth Quarter of 2023 Record Annual Revenue of $504 Million in 2023 MINNEAPOLIS, Minn. – February 9, 2024 – Proto Labs, Inc. ("Protolabs" or the "Company") (NYSE: PRLB), the world’s leading provider of digital manufacturing services, today announced financial results for the f

PRLB / Proto Labs, Inc. / BlackRock Inc. Passive Investment

SC 13G/A 1 us7437131094012224.txt us7437131094012224.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 4) PROTO LABS INC - (Name of Issuer) Common Stock - (Title of Class of Securities) 743713109 - (CUSIP Number) December 31, 2023 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to

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) þ 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

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, 2023 Proto Labs, Inc.

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, 2023 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File

Protolabs Reports Financial Results for the Third Quarter of 2023 Record Revenue of $130.7 million in the Third Quarter Record Network Revenue of $22.6 million; an 87% YoY increase GAAP Earnings Per Share of $0.31; Non-GAAP Earnings Per Share of $0.5

Exhibit 99.1 Protolabs Reports Financial Results for the Third Quarter of 2023 Record Revenue of $130.7 million in the Third Quarter Record Network Revenue of $22.6 million; an 87% YoY increase GAAP Earnings Per Share of $0.31; Non-GAAP Earnings Per Share of $0.51 MAPLE PLAIN, Minn. – November 3, 2023 – Proto Labs, Inc. ("Protolabs" or the "Company") (NYSE: PRLB), the world’s leading provider of d

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) þ 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: 00

Filing Fee Table

Exhibit 107.1 Calculation of Filing Fee Tables Form S-8 (Form Type) Proto Labs, 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)(2) Proposed Maximum Offering Price Per Unit(3) Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Equity Common Stock, par value

As filed with the Securities and Exchange Commission on August 4, 2023

As filed with the Securities and Exchange Commission on August 4, 2023 Registration No.

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 4, 2023 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File N

Protolabs Reports Financial Results for the Second Quarter of 2023 Revenue of $122.3 million in the Second Quarter of 2023 Network revenue of $20.2 million; a 79.3% YoY increase GAAP Loss Per Share of $0.01; Non-GAAP Earnings Per Share of $0.33

Exhibit 99.1 Protolabs Reports Financial Results for the Second Quarter of 2023 Revenue of $122.3 million in the Second Quarter of 2023 Network revenue of $20.2 million; a 79.3% YoY increase GAAP Loss Per Share of $0.01; Non-GAAP Earnings Per Share of $0.33 MAPLE PLAIN, Minn. – August 4, 2023 – Proto Labs, Inc. (the "Company" or "Protolabs") (NYSE: PRLB), the world’s leading provider of digital ma

Conflict Minerals Report as required by Items 1.01 and 1.02 of this Form SD.

EX-1.01 2 ex529433.htm EXHIBIT 1.01 Exhibit 1.01 Injection Molding Sheet Metal Fabrication CNC Machining 3D Printing PROTO LABS, INC. CONFLICT MINERALS REPORT For the reporting period from January 1, 2022 to December 31, 2022 This Conflict Minerals Report (this “Report”) of Proto Labs, Inc. (the “Company,” “we,” “us” or “our”) has been prepared pursuant to Rule 13p-1 and Form SD (the “Rule”) promu

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Proto Labs, Inc. (Exact Name of Registrant as Specified in its Charter) Minnesota 001-35435 (State or other jurisdiction of incorporation) (Commission File Number) 5540 Pioneer Creek Drive Maple Plain, Minnesota 55359 (Address of principal executive offices) (Zip Code) Daniel Schumacher (7

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 17, 2023 Proto Labs, Inc. (Ex

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 17, 2023 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File Num

(incorporated by reference to Exhibit 10.1 to the Company’s Form 8-K, filed on

Exhibit 10.1 PROTO LABS, INC. 2022 LONG-TERM INCENTIVE PLAN as Amended and Restated 1. General. (a) Purpose. The purpose of the Proto Labs, Inc. 2022 Long-Term Incentive Plan, as amended and restated (the “Plan”) is to help attract and retain the best available people for positions of responsibility with the Company, to provide additional incentives to them and align their interests with those of

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) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 0

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 5, 2023 Proto Labs, Inc. (Exa

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 5, 2023 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File Numb

Protolabs Reports Financial Results for the First Quarter of 2023 Revenue of $125.9 million in the First Quarter of 2023 GAAP Earnings Per Share of $0.10, Non-GAAP Earnings Per Share of $0.30

Exhibit 99.1 Protolabs Reports Financial Results for the First Quarter of 2023 Revenue of $125.9 million in the First Quarter of 2023 GAAP Earnings Per Share of $0.10, Non-GAAP Earnings Per Share of $0.30 MAPLE PLAIN, Minn. – May 5, 2023 – Proto Labs, Inc. (the "Company" or "Protolabs") (NYSE: PRLB), the world’s leading provider of digital manufacturing services, today announced financial results

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.   ) Filed by the Registrant ☑ Filed by a Party other than the Registr

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

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.   )

TABLE OF CONTENTS   UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

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) ☑ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-35

Description of Securities of Registrant

Exhibit 4.2 DESCRIPTION OF THE REGISTRANT’S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 Proto Labs, Inc. (the “Company”) has common stock registered under Section 12(b) of the Securities Exchange Act of 1934 and listed on The New York Stock Exchange. Description of Capital Stock General The summary of the general terms and provisions of the capital stock of

Subsidiaries of Proto Labs, Inc.

Exhibit 21.1 SUBSIDIARIES OF THE REGISTRANT All of the Company’s subsidiaries listed below are wholly owned. Name Jurisdiction of Incorporation or Organization PL-US International LLC United States Hubs Manufacturing Inc. United States 3D Hubs Manufacturing LLC United States Proto Labs, Ltd. United Kingdom PL International Holdings UK Ltd United Kingdom PL Euro Services Limited United Kingdom Prot

Powers of Attorney

Exhibit 24.1 PROTO LABS, INC. POWER OF ATTORNEY OF DIRECTOR AND/OR OFFICER Each of the undersigned directors and/or officers of Proto Labs, Inc., a Minnesota corporation (the “Company”), does hereby make, constitute and appoint Robert Bodor and Daniel Schumacher, and each of them, either of whom may act without the joinder of the other, the undersigned’s true and lawful attorney-in-fact and agent,

PRLB / Proto Labs Inc / DISCIPLINED GROWTH INVESTORS INC /MN - PRLB SC13G-A 2022-12-31 Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No: 1 ) PROTO LABS INC - (Name of Issuer) Common Stock - (Title of Class of Securities) 743713109 - (CUSIP Number) December 31, 2022 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is

PRLB / Proto Labs Inc / BROWN CAPITAL MANAGEMENT LLC Passive Investment

SC 13G/A 1 fp0081797-1sc13ga.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b) (AMENDMENT NO. 12)* Proto Labs, Inc. (Name of Issuer) Common Stock, Par Value $0.001 (Title of Class of Securities) 743713109 (CUSIP Number)

Regulation FD Disclosure, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 7, 2023 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File

Protolabs Reports Financial Results for the Fourth Quarter and Full Year 2022 Revenue of $115.6 million in the Fourth Quarter of 2022 Record Annual Revenue of $488.4 million in 2022 Increases share repurchase authorization to $250 million

Exhibit 99.1 Protolabs Reports Financial Results for the Fourth Quarter and Full Year 2022 Revenue of $115.6 million in the Fourth Quarter of 2022 Record Annual Revenue of $488.4 million in 2022 Increases share repurchase authorization to $250 million MAPLE PLAIN, Minn. – February 10, 2023 – Proto Labs, Inc. (the "Company" or "Protolabs") (NYSE: PRLB), the world’s leading provider of digital manuf

PRLB / Proto Labs Inc / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 10)* Name of issuer: Proto Labs Inc. Title of Class of Securities: Common Stock CUSIP Number: 743713109 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Ru

PRLB / Proto Labs Inc / BlackRock Inc. Passive Investment

SC 13G/A 1 us7437131094012323.txt us7437131094012323.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 3) PROTO LABS INC - (Name of Issuer) Common Stock - (Title of Class of Securities) 743713109 - (CUSIP Number) December 31, 2022 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to

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 November 17, 2022 Date of report (Date of earliest event reported) PROTO LABS, INC. (Exact Name of Registrant as Specified in its Charter) Minnesota 001-35435 41-1939628 (State of Incorporation) (Commission File Number) (I.R.S. Emplo

Protolabs Announces $50 Million Increase to Existing Stock Repurchase Authorization

Exhibit 99.1 Protolabs Announces $50 Million Increase to Existing Stock Repurchase Authorization MAPLE PLAIN, Minn. ? November 21, 2022 ? Proto Labs, Inc. ("Protolabs" or the "company") (NYSE: PRLB), the world?s leading provider of digital manufacturing services, announced today that on November 17, 2022 its board of directors approved a $50 million increase in its authorized stock repurchase prog

Third Amended and Restated By-Laws of Proto Labs, Inc., as amended through November 15, 2022 (incorporated by reference to Exhibit 3.2 to the Company's Form 8-K, filed on November 15, 2022).

Exhibit 3(ii) THIRD AMENDED AND RESTATED BY-LAWS OF PROTO LABS, INC. ARTICLE 1 SHAREHOLDERS Section 1.01 Place of Meetings. Each meeting of the shareholders shall be held at the principal executive office of the Corporation or at such other place as may be designated by the Board of Directors or the Chief Executive Officer. But any meeting called by or at the demand of a shareholder or shareholder

Current Report

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 15, 2022 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission Fil

Current Report

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 4, 2022 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File

Protolabs Reports Financial Results for the Third Quarter of 2022 Revenue of $121.7 million in the Third Quarter of 2022; GAAP Earnings Per Share of $0.14, Non-GAAP Earnings Per Share of $0.40

Exhibit 99.1 Protolabs Reports Financial Results for the Third Quarter of 2022 Revenue of $121.7 million in the Third Quarter of 2022; GAAP Earnings Per Share of $0.14, Non-GAAP Earnings Per Share of $0.40 MAPLE PLAIN, Minn. – November 4, 2022 – Proto Labs, Inc. (NYSE: PRLB), the world’s leading provider of digital manufacturing services, today announced financial results for the third quarter end

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) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Numbe

Proto Labs, Inc. 2022 Long-Term Incentive Plan

Exhibit 10.1 PROTO LABS, INC. 2022 LONG-TERM INCENTIVE PLAN 1.?Purpose. The purpose of the Proto Labs, Inc. 2022 Long-Term Incentive Plan (the ?Plan?) is to help attract and retain the best available people for positions of responsibility with the Company, to provide additional incentives to them and align their interests with those of the Company?s shareholders, and to thereby promote the Company

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 29, 2022 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File

Form of Performance Stock Unit Award Agreement under the 2022 Long-Term Incentive Plan (incorporated by reference to Exhibit 10.9 to the Company’s Form 8-K, filed on August 30, 2022).

Exhibit 10.9 PROTO LABS, INC. 2022 LONG-TERM INCENTIVE PLAN Performance Stock Unit Agreement Proto Labs, Inc. (the ?Company?), pursuant to its 2022 Long-Term Incentive Plan (the ?Plan?), hereby grants to you, the Participant named below, an award of Performance Stock Unit (the ?Units?). The terms and conditions of this Performance Stock Unit Award (this ?Award?) are set forth in this Performance S

Form of Restricted Stock Unit Award Agreement under the 2022 Long-Term Incentive Plan (U.S. Employees) (incorporated by reference to Exhibit 10.6 to the Company’s Form 8-K, filed on August 30, 2022).

Exhibit 10.6 PROTO LABS, INC. 2022 LONG-TERM INCENTIVE PLAN Restricted Stock Unit Agreement Proto Labs, Inc. (the ?Company?), pursuant to its 2022 Long-Term Incentive Plan (the ?Plan?), hereby grants to you, the Participant named below, a Stock Unit Award on the terms shown in the table below. The terms and conditions of this Stock Unit Award (this ?Award?) are set forth in this Agreement, consist

Form of Restricted Stock Unit Award Agreement under the 2022 Long-Term Incentive Plan (Directors) (incorporated by reference to Exhibit 10.8 to the Company’s Form 8-K, filed on August 30, 2022).

Exhibit 10.8 PROTO LABS, INC. 2022 LONG-TERM INCENTIVE PLAN Restricted Stock Unit Agreement Proto Labs, Inc. (the ?Company?), pursuant to its 2022 Long-Term Incentive Plan (the ?Plan?), hereby grants to you, the Participant named below, a Stock Unit Award on the terms shown in the table below. The terms and conditions of this Stock Unit Award (this ?Award?) are set forth in this Agreement, consist

As filed with the Securities and Exchange Commission on August 30, 2022

As filed with the Securities and Exchange Commission on August 30, 2022 Registration No.

Form of Restricted Stock Unit Award Agreement under the 2022 Long-Term Incentive Plan (U.K. Employees) (incorporated by reference to Exhibit 10.7 to the Company’s Form 8-K, filed on August 30, 2022).

Exhibit 10.7 PROTO LABS, INC. 2022 LONG-TERM INCENTIVE PLAN Restricted Stock Unit Agreement Proto Labs, Inc. (the ?Company?), pursuant to its 2022 Long-Term Incentive Plan (the ?Plan?), hereby grants to you, the Participant named below, a Stock Unit Award on the terms shown in the table below. The terms and conditions of this Stock Unit Award (this ?Award?) are set forth in this Agreement, consist

Form of Deferred Stock Unit Award Agreement under the 2022 Long-Term Incentive Plan (incorporated by reference to Exhibit 10.10 to the Company’s Form 8-K, filed on August 30, 2022).

Exhibit 10.10 PROTO LABS, INC. 2022 LONG-TERM INCENTIVE PLAN Deferred Stock Unit Agreement This Deferred Stock Unit Agreement (the ?Agreement?) is made and entered into as of the grant date indicated below (the ?Grant Date?), by and between Proto Labs, Inc. (the ?Company?), and you, the participant whose name appears below. The Agreement consists of this cover page and the Deferred Stock Unit Term

Form of Non-Statutory Stock Option Agreement (Directors) under the 2022 Long-Term Incentive Plan (incorporated by reference to Exhibit 10.3 to the Company’s Form 8-K, filed on August 30, 2022).

Exhibit 10.3 PROTO LABS, INC. 2022 LONG-TERM INCENTIVE PLAN Director Non-Statutory Stock Option Agreement Proto Labs, Inc. (the ?Company?), pursuant to its 2022 Long-Term Incentive Plan (the ?Plan?), hereby grants to you, the Optionee named below, an Option to purchase the number of shares of the Company?s common stock shown in the table below at the specified exercise price per share. The terms a

Form of Non-Statutory Stock Option Agreement (U.K. Employees) under the 2022 Long-Term Incentive Plan (incorporated by reference to Exhibit 10.5 to the Company’s Form 8-K, filed on August 30, 2022).

Exhibit 10.5 PROTO LABS, INC. 2022 LONG-TERM INCENTIVE PLAN U.K. Employee Non-Statutory Stock Option Agreement Proto Labs, Inc. (the ?Company?), pursuant to its 2022 Long-Term Incentive Plan (the ?Plan?), hereby grants to you, the Optionee named below, an Option to purchase the number of shares of the Company?s common stock shown in the table below at the specified exercise price per share. The te

As filed with the Securities and Exchange Commission on August 30, 2022

As filed with the Securities and Exchange Commission on August 30, 2022 Registration No.

As filed with the Securities and Exchange Commission on August 30, 2022

As filed with the Securities and Exchange Commission on August 30, 2022 Registration No.

Form of Non-Statutory Stock Option Agreement (U.S. Employees) under the 2022 Long-Term Incentive Plan (incorporated by reference to Exhibit 10.4 to the Company’s Form 8-K, filed on August 30, 2022).

Exhibit 10.4 PROTO LABS, INC. 2022 LONG-TERM INCENTIVE PLAN Employee Non-Statutory Stock Option Agreement Proto Labs, Inc. (the ?Company?), pursuant to its 2022 Long-Term Incentive Plan (the ?Plan?), hereby grants to you, the Optionee named below, an Option to purchase the number of shares of the Company?s common stock shown in the table below at the specified exercise price per share. The terms a

As filed with the Securities and Exchange Commission on August 30, 2022

As filed with the Securities and Exchange Commission on August 30, 2022 Registration No.

Filing Fee Table

Exhibit 107.1 Calculation of Filing Fee Table FORM S-8 (Form Type) PROTO LABS, 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 Unit (2) Maximum Aggregate Offering Price (2) Fee Rate Amount of Registration Fee Equity Common Stock $0.001 p

Form of Incentive Stock Option Agreement under the 2022 Long-Term Incentive Plan (incorporated by reference to Exhibit 10.2 to the Company’s Form 8-K, filed on August 30, 2022).

Exhibit 10.2 PROTO LABS, INC. 2022 LONG-TERM INCENTIVE PLAN Employee Incentive Stock Option Agreement Proto Labs, Inc. (the ?Company?), pursuant to its 2022 Long-Term Incentive Plan (the ?Plan?), hereby grants to you, the Optionee named below, an Option to purchase the number of shares of the Company?s common stock shown in the table below at the specified exercise price per share. The terms and c

Protolabs Reports Financial Results for the Second Quarter of 2022 Record Revenue of $126.9 million in the Second Quarter of 2022; GAAP Earnings Per Share of $0.09, Non-GAAP Earnings Per Share of $0.46

Exhibit 99.1 Protolabs Reports Financial Results for the Second Quarter of 2022 Record Revenue of $126.9 million in the Second Quarter of 2022; GAAP Earnings Per Share of $0.09, Non-GAAP Earnings Per Share of $0.46 MAPLE PLAIN, Minn. ? August 5, 2022 ? Proto Labs, Inc. ("Protolabs" or "the company") (NYSE: PRLB), the world?s leading provider of digital manufacturing services, today announced finan

Current Report

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, 2022 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File N

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) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 00

Proto Labs, Inc. 2022 Long-Term Incentive Plan (incorporated by reference to Appendix A to the Company’s Proxy Statement filed on July 19, 2022)

TABLE OF CONTENTS ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

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

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

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.   )

TABLE OF CONTENTS ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

Protolabs Announces Dan Schumacher as Chief Financial Officer

Exhibit 99.1 Injection Molding Sheet Metal Fabrication CNC Machining 3D Printing Protolabs Announces Dan Schumacher as Chief Financial Officer MINNEAPOLIS, MINN.?June 6, 2022? Protolabs (NYSE: PRLB), a leading online and technology-enabled digital manufacturer has announced Dan Schumacher as its new Chief Financial Officer (CFO) effective immediately. ?I am very excited to officially welcome Dan a

SEVERANCE AGREEMENT

Exhibit 99.2 SEVERANCE AGREEMENT This Severance Agreement (the ?Agreement?) is entered into as of (the ?Effective Date?) by and between Proto Labs, Inc., a Minnesota corporation (the ?Company?), and (?Executive?), an individual residing in . Recitals A. Executive is employed by the Company and is party to an Employee Confidentiality, Intellectual Property Assignment Agreement, Non-Solicitation and

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 June 3, 2022 Date of report (Date of earliest event reported) PROTO LABS, INC. (Exact Name of Registrant as Specified in its Charter) Minnesota 001-35435 41-1939628 (State of Incorporation) (Commission File Number) (I.R.S. Employer I

Material Impairments, Costs Associated with Exit or Disposal Activities

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 May 27, 2022 Date of report (Date of earliest event reported) PROTO LABS, INC. (Exact Name of Registrant as Specified in its Charter) Minnesota 001-35435 41-1939628 (State of Incorporation) (Commission File Number) (I.R.S. Employer I

Conflict Minerals Report as required by Items 1.01 and 1.02 of this Form SD.

EX-1.01 2 ex380507.htm EXHIBIT 1.01 Exhibit 1.01 Injection Molding Sheet Metal Fabrication CNC Machining 3D Printing PROTO LABS, INC. CONFLICT MINERALS REPORT For the reporting period from January 1, 2021 to December 31, 2021 This Conflict Minerals Report (the “Report”) of Proto Labs, Inc. (the “Company,” “we,” “us” or “our”) has been prepared pursuant to Rule 13p-1 and Form SD (the “Rule”) promul

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Proto Labs, Inc. (Exact Name of Registrant as Specified in its Charter) Minnesota 001-35435 (State or other jurisdiction of incorporation or organization) (Commission File Number) 5540 Pioneer Creek Drive Maple Plain, Minnesota 55359 (Address of principal executive offices) (Zip Code) Dani

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 18, 2022 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File Num

Protolabs Reports Financial Results for the First Quarter of 2022 Revenue of $124.2 million in the First Quarter of 2022; GAAP Earnings Per Share of $0.19, Non-GAAP Earnings Per Share of $0.38

Exhibit 99.1 3D Printing CNC Machining Sheet Metal Fabrication Injection Molding Protolabs Reports Financial Results for the First Quarter of 2022 Revenue of $124.2 million in the First Quarter of 2022; GAAP Earnings Per Share of $0.19, Non-GAAP Earnings Per Share of $0.38 MAPLE PLAIN, Minn. ? May 6, 2022 ? Proto Labs, Inc. ("Protolabs" or the "Company") (NYSE: PRLB), the world?s leading provider

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) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2022 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 0

Current Report

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 6, 2022 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File Numb

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

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

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.   )

TABLE OF CONTENTS ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

LETTER

United States securities and exchange commission logo March 31, 2022 Daniel Schumacher Interim Chief Financial Officer Proto Labs Inc 5540 Pioneer Creek Drive Maple Plain, Minnesota 55359 Re: Proto Labs Inc Form 10-K for the Year Ended December 31, 2021 Filed February 18, 2022 File No.

* * * * *

March 25, 2022 Via EDGAR Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 Attention: Ms. Heather Clark and Ms. Claire Erlanger Re: Proto Labs, Inc. Form 10-K for the Year Ended December 31, 2021 Form 8-K furnished February 11, 2022 File No. 001-35435 To Whom it May Concern: We are writing to respond to the comments raised in the letter to Proto Labs, Inc. (the "Company"

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 March 15, 2022 Date of report (Date of earliest event reported) PROTO LABS, INC. (Exact Name of Registrant as Specified in its Charter) Minnesota 001-35435 41-1939628 (State of Incorporation) (Commission File Number) (I.R.S. Employer

LETTER

United States securities and exchange commission logo March 15, 2022 Daniel Schumacher Interim Chief Financial Officer Proto Labs Inc 5540 Pioneer Creek Drive Maple Plain, Minnesota 55359 Re: Proto Labs Inc Form 10-K for the Year Ended December 31, 2021 Form 8-K furnished February 11, 2022 File No.

PRLB / Proto Labs Inc / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv0040-protolabsinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 9)* Name of issuer: Proto Labs Inc. Title of Class of Securities: Common Stock CUSIP Number: 743713109 Date of Event Which Requires Filing of this Statement: February 28, 2022 Check the appropriate box to designate the ru

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) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021 or ? 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: 001-35

Subsidiaries of Proto Labs, Inc.

Exhibit 21.1 SUBSIDIARIES OF THE REGISTRANT All of the Company?s subsidiaries listed below are wholly owned. Name Jurisdiction of Incorporation or Organization PL-US International LLC United States Hubs Manufacturing Inc. United States 3D Hubs Manufacturing LLC United States Proto Labs, Ltd. United Kingdom PL International Holdings UK Ltd United Kingdom PL Euro Services Limited United Kingdom Prot

Powers of Attorney

EX-24.1 4 ex313212.htm EXHIBIT 24.1 Exhibit 24.1 PROTO LABS, INC. POWER OF ATTORNEY OF DIRECTOR AND/OR OFFICER Each of the undersigned directors and/or officers of Proto Labs, Inc., a Minnesota corporation (the “Company”), does hereby make, constitute and appoint Robert Bodor and Daniel Schumacher, and each of them, either of whom may act without the joinder of the other, the undersigned’s true an

PRLB / Proto Labs Inc / DISCIPLINED GROWTH INVESTORS INC /MN - 13G PRLB 2021-12-31 Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: ) PROTO LABS INC - (Name of Issuer) Common Stock - (Title of Class of Securities) 743713109 - (CUSIP Number) December 31, 2021 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is file

PRLB / Proto Labs Inc / Nikko Asset Management Americas, Inc. - SC13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Proto Labs, Inc. (Name of Issuer) Common stock, par value $0.001 per share (Title of Class of Securities) 743713109 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule p

PRLB / Proto Labs Inc / BROWN CAPITAL MANAGEMENT LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b) (AMENDMENT NO. 11)* Proto Labs, Inc. (Name of Issuer) Common Stock, Par Value $0.001 (Title of Class of Securities) 743713109 (CUSIP Number) Eddie C. Brown Brown Capital Man

PRLB / Proto Labs Inc / HARDING LOEVNER LP - HARDING LOEVNER LP Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Proto Labs Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 743713109 (CUSIP Number) December 31, 2021 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedul

Protolabs Reports Financial Results for the Fourth Quarter and Full Year 2021 Revenue of $123.6 million in the Fourth Quarter of 2021, an increase of 18% year-over-year Record Annual Revenue of $488.1 million in 2021

Exhibit 99.1 3D Printing CNC Machining Sheet Metal Fabrication Injection Molding Protolabs Reports Financial Results for the Fourth Quarter and Full Year 2021 Revenue of $123.6 million in the Fourth Quarter of 2021, an increase of 18% year-over-year Record Annual Revenue of $488.1 million in 2021 MAPLE PLAIN, Minn. ? February 11, 2022 ? Proto Labs, Inc. (NYSE: PRLB), the world?s leading provider o

Current Report

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, 2022 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission Fil

PRLB / Proto Labs Inc / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 8)* Name of issuer: Proto Labs Inc. Title of Class of Securities: Common Stock CUSIP Number: 743713109 Date of Event Which Requires Filing of this Statement: December 31, 2021 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ??Rul

PRLB / Proto Labs Inc / Sumitomo Mitsui Trust Holdings, Inc. - AMENDMENT NO. 1 Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 1)* Proto Labs, Inc. (Name of Issuer) Common Stock, par value $0.001 per share (Title of Class of Securities) 743713109 (CUSIP Number) December 31, 2021 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule

PRLB / Proto Labs Inc / BlackRock Inc. Passive Investment

SC 13G/A 1 us7437131094012722.txt us7437131094012722.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 2) PROTO LABS INC - (Name of Issuer) Common Stock - (Title of Class of Securities) 743713109 - (CUSIP Number) December 31, 2021 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to

PRLB / Proto Labs Inc / BlackRock Inc. Passive Investment

us7437131094012622.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 1) PROTO LABS INC - (Name of Issuer) Common Stock - (Title of Class of Securities) 743713109 - (CUSIP Number) December 31, 2021 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to whi

PRLB / Proto Labs Inc / RIVERBRIDGE PARTNERS LLC - PROTO LABS INC 13G AMENDMENT Passive Investment

Securities and Exchange Commission Washington, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No.

PRLB / Proto Labs Inc / RIVERBRIDGE PARTNERS LLC - PROTO LABS INC 13G AMENDMENT Passive Investment

Securities and Exchange Commission Washington, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No.

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 December 8, 2021 Date of report (Date of earliest event reported) PROTO LABS, INC. (Exact Name of Registrant as Specified in its Charter) Minnesota 001-35435 41-1939628 (State of Incorporation) (Commission File Number) (I.R.S. Employ

Protolabs Announces $50 Million Increase to Stock Repurchase Authorization

Exhibit 99.1 3D Printing CNC Machining Sheet Metal Fabrication Injection Molding Protolabs Announces $50 Million Increase to Stock Repurchase Authorization MAPLE PLAIN, MINN.?December 10, 2021? Protolabs (NYSE: PRLB) announced today that on December 8, 2021 its Board of Directors approved a $50 million increase in its authorized stock repurchase program currently in effect, with an expiration date

Protolabs Names Stacy Greiner to Board of Directors GM and CMO at Dun & Bradstreet brings 20 years of strategic product and marketing leadership to Protolabs

Exhibit 99.1 Injection Molding Sheet Metal Fabrication CNC Machining 3D Printing Protolabs Names Stacy Greiner to Board of Directors GM and CMO at Dun & Bradstreet brings 20 years of strategic product and marketing leadership to Protolabs MINNEAPOLIS, MINN.?November 16?Digital manufacturer Protolabs (NYSE: PRLB) has named Stacy Greiner to its board of directors, effective Monday, Nov. 15. Greiner

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 November 15, 2021 Date of report (Date of earliest event reported) PROTO LABS, INC. (Exact Name of Registrant as Specified in its Charter) Minnesota 001-35435 41-1939628 (State of Incorporation) (Commission File Number) (I.R.S. Emplo

Protolabs Announces Departure of CFO John Way and Appoints Dan Schumacher Interim CFO

Exhibit 99.1 Injection Molding Sheet Metal Fabrication CNC Machining 3D Printing Protolabs Announces Departure of CFO John Way and Appoints Dan Schumacher Interim CFO MINNEAPOLIS, MINN.?November 5, 2021? Proto Labs, Inc. (NYSE: PRLB), a leading online and technology-enabled, on-demand manufacturer, today announced John Way is resigning as Chief Financial Officer (CFO) to pursue an opportunity at 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 CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 November 3, 2021 Date of report (Date of earliest event reported) PROTO LABS, INC. (Exact Name of Registrant as Specified in its Charter) Minnesota 001-35435 41-1939628 (State of Incorporation) (Commission File Number) (I.R.S. Employ

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) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2021 or ? 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

Protolabs Reports Financial Results for the Third Quarter of 2021 Record Revenue of $125.3 million in the Third Quarter of 2021, an increase of 17% year-over-year

Exhibit 99.1 3D Printing CNC Machining Sheet Metal Fabrication Injection Molding Protolabs Reports Financial Results for the Third Quarter of 2021 Record Revenue of $125.3 million in the Third Quarter of 2021, an increase of 17% year-over-year MAPLE PLAIN, Minn. ? October 28, 2021 ? Proto Labs, Inc. (NYSE: PRLB), the world?s leading provider of digital manufacturing services, today announced finan

Current Report

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 28, 2021 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File

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) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2021 or ? 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

Current Report

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 29, 2021 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File Nu

Protolabs Reports Financial Results for the Second Quarter of 2021 Record Revenue of $123.0 million in the Second Quarter of 2021, an increase of 15% over the Second Quarter of 2020

Exhibit 99.1 3D Printing CNC Machining Sheet Metal Fabrication Injection Molding Protolabs Reports Financial Results for the Second Quarter of 2021 Record Revenue of $123.0 million in the Second Quarter of 2021, an increase of 15% over the Second Quarter of 2020 MAPLE PLAIN, Minn. ? July 29, 2021 ? Proto Labs, Inc. (NYSE: PRLB), the world?s largest ecommerce manufacturer and supplier of on-demand

PRLB / Proto Labs Inc / BROWN CAPITAL MANAGEMENT LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b) (AMENDMENT NO. 10)* Proto Labs, Inc. (Name of Issuer) Common Stock, Par Value $0.001 (Title of Class of Securities) 743713109 (CUSIP Number) Eddie C. Brown Brown Capital Man

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Proto Labs, Inc. (Exact Name of Registrant as Specified in its Charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation or organization) (Commission File Number) (I.R.S. Employer Identification No.) 5540 Pioneer Creek Drive Maple Plain, Minnesota 55359 (Address

Conflict Minerals Report as required by Items 1.01 and 1.02 of this Form SD.

EX-1.01 2 ex253031.htm EXHIBIT 1.01 Exhibit 1.01 Injection Molding Sheet Metal Fabrication CNC Machining 3D Printing PROTO LABS, INC. CONFLICT MINERALS REPORT For the reporting period from January 1, 2020 to December 31, 2020 This Conflict Minerals Report (the “Report”) of Proto Labs, Inc. (the “Company,” “we,” “us” or “our”) has been prepared pursuant to Rule 13p-1 and Form SD (the “Rule”) promul

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 18, 2021 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File Num

Quarterly Report - FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2021 or ? 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: 0

Current Report

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 6, 2021 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File Numb

Protolabs Reports Financial Results for the First Quarter of 2021 First Quarter 2021 Revenue of $116.1 million

Exhibit 99.1 3D Printing CNC Machining Sheet Metal Fabrication Injection Molding Protolabs Reports Financial Results for the First Quarter of 2021 First Quarter 2021 Revenue of $116.1 million MAPLE PLAIN, Minn. ? May 6, 2021 ? Proto Labs, Inc. (NYSE: PRLB), the world?s largest ecommerce manufacturer and supplier of on-demand prototype and production parts, today announced financial results for the

- DEF 14A

TABLE OF CONTENTS ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

- 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.??) Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Defi

Subsidiaries of Proto Labs, Inc.

EX-21.1 2 ex215172.htm EXHIBIT 21.1 Exhibit 21.1 SUBSIDIARIES OF THE REGISTRANT All of the Company’s subsidiaries listed below are wholly owned. Name Jurisdiction of Incorporation or Organization PL-US International LLC United States Proto Labs, Ltd. United Kingdom PL International Holdings UK Ltd United Kingdom PL Euro Services Limited United Kingdom Proto Labs GmbH Germany Proto Labs Tooling Gmb

Annual Report - FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020 or ? 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: 001-35

Powers of Attorney

EX-24.1 4 ex215174.htm EXHIBIT 24.1 Exhibit 24.1 PROTO LABS, INC. POWER OF ATTORNEY OF DIRECTOR AND/OR OFFICER Each of the undersigned directors and/or officers of Proto Labs, Inc., a Minnesota corporation (the “Company”), does hereby make, constitute and appoint Victoria M. Holt and John A. Way, and each of them, either of whom may act without the joinder of the other, the undersigned’s true and

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 Proto Labs Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 743713109 (CUSIP Number) December 31, 2020 (Da

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 Proto Labs Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 743713109 (CUSIP Number) December 31, 2020 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [X] Rul

- FORM S-3ASR

Table of Contents As filed with the Securities and Exchange Commission on February 16, 2021 Registration No.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 1)* Proto Labs, Inc. (Name of Issuer) Common stock (Title of Class of Securities) (CUSIP Number) December 31,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No.

Current Report

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 12, 2021 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission Fil

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b) (AMENDMENT NO. 9)* Prot

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b) (AMENDMENT NO. 9)* Proto Labs, Inc. (Name of Issuer) Common Stock, Par Value $0.001 (Title of Class of Securities) 743713109 (CUSIP Number) Eddie C. Brown Brown Capital Mana

Protolabs Reports Financial Results for the Fourth Quarter and Full Year 2020

EX-99.1 2 ex225464.htm EXHIBIT 99.1 Exhibit 99.1 3D Printing CNC Machining Sheet Metal Fabrication Injection Molding Protolabs Reports Financial Results for the Fourth Quarter and Full Year 2020 MAPLE PLAIN, Minn. – February 12. 2021 – Proto Labs, Inc. (NYSE: PRLB), a leading online and technology-enabled, quick-turn on-demand manufacturer, today announced financial results for the fourth quarter

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. n/a )*

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. n/a )* Proto Labs, Inc. (Name of Issuer) Common stock, par value $0.001 per share (Title of Class of Securities) 743713109 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rul

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 7)*

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 7)* Name of issuer: Proto Labs Inc. Title of Class of Securities: Common Stock CUSIP Number: 743713109 Date of Event Which Requires Filing of this Statement: December 31, 2020 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Rul

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. n/a)*

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. n/a)* Proto Labs, Inc. (Name of Issuer) Common Stock, par value $0.001 per share (Title of Class of Securities) 743713109 (CUSIP Number) December 31, 2020 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule

Financial Statements and Exhibits, 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 January 29, 2021 Date of report (Date of earliest event reported) PROTO LABS, INC. (Exact Name of Registrant as Specified in its Charter) Minnesota 001-35435 41-1939628 (State of Incorporation) (Commission File Number) (I.R.S. Employ

Consulting Agreement, dated February 4, 2021, by and between Proto Labs, Inc. and Victoria M. Holt (incorporated by reference to Exhibit 10.2 to the Company’s Form 8-K, filed on February 4, 2021).

Exhibit 10.2 CONSULTING AGREEMENT This Consulting Agreement (this “Agreement”) is made and entered into by and between Proto Labs, Inc., a Minnesota corporation (the “Company”), and Victoria M. Holt, a resident of the State of Minnesota (the “Consultant”), effective as of February 4, 2021 (the “Effective Date”). RECITALS WHEREAS, the Consultant is employed by the Company as its Chief Executive Off

Executive Employment Agreement, dated January 29, 2021, by and between Proto Labs, Inc. and Robert Bodor (incorporated by reference to Exhibit 10.1 to the Company’s Form 8-K, filed on February 4, 2021).

Exhibit 10.1 PROTO LABS, INC. EXECUTIVE EMPLOYMENT AGREEMENT This Executive Employment Agreement (the “Agreement”) is entered into as of January 29, 2021 (the “Effective Date”) by and between Proto Labs, Inc., a Minnesota corporation (the “Company”), and Robert Bodor (“Executive”). Recitals A. Executive has been employed by the Company. B. The Company desires to continue to employ Executive, and E

Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, 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 January 22, 2021 Date of report (Date of earliest event reported) PROTO LABS, INC. (Exact Name of Registrant as Specified in its Charter) Minnesota 001-35435 41-1939628 (State of Incorporation) (Commission File Number) (I.R.S. Employ

PROTO LABS INC 13G AMENDMENT #7

Securities and Exchange Commission Washington, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No.

Protolabs Completes Acquisition of 3D Hubs

EX-99.1 2 ex222087.htm EXHIBIT 99.1 Exhibit 99.1 Protolabs Completes Acquisition of 3D Hubs MAPLE PLAIN, Minn.—January 25, 2021—Proto Labs, Inc. (NYSE: PRLB), a global technology-enabled digital manufacturing leader, today announced that it has completed its acquisition of 3D Hubs, Inc. (“3D Hubs”), a leading online manufacturing platform that provides customers with on-demand access to a global n

SC 13G

us7437131094012521.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: ) PROTO LABS INC - (Name of Issuer) Common Stock - (Title of Class of Securities) 743713109 - (CUSIP Number) December 31, 2020 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to whic

Agreement and Plan of Merger, dated January 18,2021, by and among 3D Hubs, Inc., Proto Labs, Inc., Lithium Merger Sub I, Inc., Lithium M

Exhibit 2.1 EXECUTION VERSION AGREEMENT AND PLAN OF MERGER by and among 3D HUBS, INC., PROTO LABS, INC., LITHIUM MERGER SUB I, INC., LITHIUM MERGER SUB II, INC., and Shareholder Representative Services LLC, solely in its capacity as the Securityholder Representative January 18, 2021 Table of Contents Page ARTICLE I THE MERGER 2 1.01 The Merger 2 1.02 Effect on Capital Stock 3 1.03 Effect on Option

Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, Financial Statements and Exhibits, Other Events - FORM 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 January 18, 2021 Date of report (Date of earliest event reported) PROTO LABS, INC. (Exact Name of Registrant as Specified in its Charter) Minnesota 001-35435 41-1939628 (State of Incorporation) (Commission File Number) (I.R.S. Employ

Protolabs Reaches Agreement to Acquire 3D Hubs, Creates the World’s Broadest Digital Manufacturing Offer for Custom Parts

Exhibit 99.1 3D Printing CNC Machining Sheet Metal Fabrication Injection Molding Protolabs Reaches Agreement to Acquire 3D Hubs, Creates the World’s Broadest Digital Manufacturing Offer for Custom Parts Transaction Highlights: ● Significantly expands customer offering with network of premium manufacturing partners ● Transformational acquisition enhances customer value proposition enabling Protolab

Protolabs Announces CEO Succession Plan

Exhibit 99.1 3D Printing CNC Machining Sheet Metal Fabrication Injection Molding Protolabs Announces CEO Succession Plan MAPLE PLAIN, Minn. – December 14, 2020 – Proto Labs, Inc. (NYSE: PRLB), a leading online and technology-enabled, on-demand manufacturer, today announced that its Board of Directors has unanimously elected Robert Bodor to succeed Vicki Holt as the company’s President and Chief Ex

Financial Statements and Exhibits, 8-K - FORM 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 December 9, 2020 Date of report (Date of earliest event reported) PROTO LABS, INC. (Exact Name of Registrant as Specified in its Charter) Minnesota 001-35435 41-1939628 (State of Incorporation) (Commission File Number) (I.R.S. Employ

Quarterly Report - FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2020 or ☐ 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

Protolabs Reports Financial Results for the Third Quarter 2020 Third Quarter 2020 Revenue of $107.5 million Third Quarter 2020 GAAP EPS of $0.55, Non-GAAP EPS of $0.67

Exhibit 99.1 Protolabs Reports Financial Results for the Third Quarter 2020 Third Quarter 2020 Revenue of $107.5 million Third Quarter 2020 GAAP EPS of $0.55, Non-GAAP EPS of $0.67 MAPLE PLAIN, Minn. – October 29, 2020 – Proto Labs, Inc. (NYSE: PRLB), a leading online and technology-enabled, quick-turn, on-demand manufacturer, today announced financial results for the third quarter ended September

- FORM 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, 2020 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File

PRLB / Proto Labs, Inc. / ARK Investment Management LLC - SC 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No.

Quarterly Report - FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2020 or ☐ 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

Protolabs Reports Financial Results for the Second Quarter 2020 Second Quarter 2020 Revenue of $106.6 million Second Quarter 2020 GAAP EPS of $0.47, Non-GAAP EPS of $0.59

Exhibit 99.1 Protolabs Reports Financial Results for the Second Quarter 2020 Second Quarter 2020 Revenue of $106.6 million Second Quarter 2020 GAAP EPS of $0.47, Non-GAAP EPS of $0.59 MAPLE PLAIN, Minn. – July 28, 2020 – Proto Labs, Inc. (NYSE: PRLB), a leading online and technology-enabled, quick-turn, on-demand manufacturer, today announced financial results for the second quarter ended June 30,

Current Report

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 28, 2020 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File Nu

Conflict Minerals Report as required by Items 1.01 and 1.02 of this Form SD.

Exhibit 1.01 Injection Molding Sheet Metal Fabrication CNC Machining 3D Printing PROTO LABS, INC. CONFLICT MINERALS REPORT For the reporting period from January 1, 2019 to December 31, 2019 This Conflict Minerals Report (the “Report”) of Proto Labs, Inc. (the “Company,” “we,” “us” or “our”) has been prepared pursuant to Rule 13p-1 and Form SD (the “Rule”) promulgated under the Securities Exchange

- FORM SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Proto Labs, Inc. (Exact Name of Registrant as Specified in its Charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation or organization) (Commission File Number) (I.R.S. Employer Identification No.) 5540 Pioneer Creek Drive Maple Plain, Minnesota 55359 (Address

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 May 19, 2020 Date of report (Date of earliest event reported) PROTO LABS, INC. (Exact Name of Registrant as Specified in its Charter) Minnesota 001-35435 41-1939628 (State of Incorporation) (Commission File Number) (I.R.S. Employer I

Quarterly Report - FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2020 or ☐ 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: 0

Current Report

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 30, 2020 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File N

Current Report

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 30, 2020 Proto Labs, Inc. (Exact name of registrant as specified in its charter) Minnesota 001-35435 41-1939628 (State or other jurisdiction of incorporation) (Commission File N

Protolabs Reports Financial Results for the First Quarter 2020 First Quarter 2020 Revenue of $115.1 million, an increase of 1.5% over 2019 First Quarter 2020 GAAP EPS of $0.52, Non-GAAP EPS of $0.61

Exhibit 99.1 Protolabs Reports Financial Results for the First Quarter 2020 First Quarter 2020 Revenue of $115.1 million, an increase of 1.5% over 2019 First Quarter 2020 GAAP EPS of $0.52, Non-GAAP EPS of $0.61 MAPLE PLAIN, Minn. – April 30, 2020 – Proto Labs, Inc. (NYSE: PRLB), a leading online and technology-enabled, quick-turn, on-demand manufacturer, today announced financial results for the

PRLB / Proto Labs, Inc. DEFA14A - - 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. ) Filed by the Registrant ☑ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

Schedule 14A

TABLE OF CONTENTS   UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

Annual Report - FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☑ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019 or ☐ 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: 001-35

Powers of Attorney

Exhibit 24.1 PROTO LABS, INC. POWER OF ATTORNEY OF DIRECTOR AND/OR OFFICER Each of the undersigned directors and/or officers of Proto Labs, Inc., a Minnesota corporation (the “Company”), does hereby make, constitute and appoint Victoria M. Holt and John A. Way, and each of them, either of whom may act without the joinder of the other, the undersigned’s true and lawful attorney-in-fact and agent, w

Description of Securities of Registrant

Exhibit 4.2 DESCRIPTION OF THE REGISTRANT’S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 As of December 31, 2019, Proto Labs, Inc. (the “Company”) had common stock registered under Section 12(b) of the Securities Exchange Act of 1934 and listed on The New York Stock Exchange. Description of Capital Stock General The summary of the general terms and provisions

Subsidiaries of Proto Labs, Inc.

Exhibit 21.1 SUBSIDIARIES OF THE REGISTRANT All of the Company’s subsidiaries listed below are wholly owned. Name Jurisdiction of Incorporation or Organization PL-US International LLC United States Rapid Management Group LLC United States Rapid Sheet Metal LLC (RSM) United States Rapid Manufacturing LLC (RM) United States Proto Labs, Ltd. United Kingdom PL International Holdings UK Ltd United King

PRLB / Proto Labs, Inc. / BROWN CAPITAL MANAGEMENT LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b) (AMENDMENT NO. 8)* Proto Labs, Inc. (Name of Issuer) Common Stock, Par Value $0.001 (Title of Class of Securities) 743713109 (CUSIP Number) Eddie C. Brown Brown Capital Mana

PRLB / Proto Labs, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 6)* Name of issuer: Proto Labs Inc Title of Class of Securities: Common Stock CUSIP Number: 743713109 Date of Event Which Requires Filing of this Statement: December 31, 2019 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Rule

Protolabs Reports Financial Results for the Fourth Quarter and Full Year 2019 Record Full Year 2019 Revenue of $458.7 million, an increase of 3% over 2018

Exhibit 99.1 Protolabs Reports Financial Results for the Fourth Quarter and Full Year 2019 Record Full Year 2019 Revenue of $458.7 million, an increase of 3% over 2018 MAPLE PLAIN, Minn. – February 6, 2020 – Proto Labs, Inc. (NYSE: PRLB), a leading online and technology-enabled, quick-turn, on-demand manufacturer, today announced financial results for the fourth quarter and full year ended Decembe