ALGM / Allegro MicroSystems, Inc. - Pengajuan SECLaporan Tahunan, Pernyataan Proksi

Allegro MicroSystems, Inc.
US ˙ NasdaqGS ˙ US01749D1054

Mga Batayang Estadistika
LEI 54930004TGPV6DR3LE12
CIK 866291
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Allegro MicroSystems, Inc.
SEC Filings (Chronological Order)
Halaman ini menyediakan daftar lengkap dan kronologis dari Pengajuan SEC, tidak termasuk pengajuan kepemilikan yang kami sediakan di tempat lain.
August 8, 2025 8-K

FORM 8-K Item 5.07. Submission of Matters to a Vote of Security Holders. Item 9.01. Financial Statements and Exhibits.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 7, 2025 Allegro MicroSystems, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39675 46-2405937 (State or Other Jurisdiction of Incorporation) (Commissi

August 1, 2025 10-Q

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

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 27, 2025 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-39675 ALLEGRO MI

July 31, 2025 EX-99.1

Allegro MicroSystems Reports First Quarter 2026 Results Sales Increased 22% Year-Over-Year to $203 Million

Exhibit 99.1 Allegro MicroSystems Reports First Quarter 2026 Results Sales Increased 22% Year-Over-Year to $203 Million Manchester, NH, July 31, 2025 – Allegro MicroSystems, Inc. (“Allegro” or the “Company”) (Nasdaq: ALGM), a global leader in power and sensing semiconductor solutions for motion control and energy efficient systems, today announced financial results for its first quarter ended June

July 31, 2025 8-K

FORM 8-K Item 2.02 Results of Operations and Financial Condition. Item 9.01 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): July 31, 2025 Allegro MicroSystems, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39675 46-2405937 (State or Other Jurisdiction of Incorporation) (Commissio

June 25, 2025 DEFA14A

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

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

June 25, 2025 DEF 14A

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

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

May 22, 2025 EX-21.1

Subsidiaries of Allegro MicroSystems, Inc.

Exhibit 21.1 Subsidiaries of Allegro MicroSystems, Inc. Name State of Other Jurisdiction of Incorporation or Organization Allegro MicroSystems, LLC Delaware Allegro MicroSystems Argentina, S.A. Argentina Allegro MicroSystems Argentina S.A. Sucursal Uruguay Uruguay Allegro MicroSystems Business Development, Inc. Delaware Allegro MicroSystems Europe Limited United Kingdom Allegro MicroSystems France

May 22, 2025 EX-10.23

Amendment, dated March 31, 2025, to the Distribution Agreement dated April 1, 2023 by and between Allegro MicroSystems, LLC and Sanken Electric Co., Ltd.

Exhibit 10.23 AMENDMENT #1 TO THE DISTRIBUTION AGREEMENT THIS AMENDMENT #1 TO THE DISTRIBUTION AGREEMENT (hereinafter the “Amendment #1”) is entered into this 31st day of March 2025 (the “Effective Date”) by and between Sanken Electric, Co., Ltd., located at 3-6-3 Kitano, Niiza-shi, Saitama, Japan (“SANKEN”), and Allegro MicroSystems, Inc, located at 955 Perimeter Road, Manchester, New Hampshire 0

May 22, 2025 EX-10.14

Amended and Restated Form of Severance Agreement between Allegro MicroSystems, Inc. and its executive officers

Exhibit 10.14 FORM OF SEVERANCE AGREEMENT THIS AGREEMENT (the “Agreement”) is entered into as of between Allegro MicroSystems, LLC, a Delaware limited liability company (“Allegro”), and [NAME], [TITLE] (“Executive”). WHEREAS, Allegro wishes to ensure that Allegro executives will continue to exert maximum effort toward the success of the Company and to continue their employment with Allegro, withou

May 22, 2025 EX-10.15

Summary of Allegro MicroSystems, Inc. Non-Employee Director Compensation, as amended

Exhibit 10.15 Annual Non-Employee Director Compensation Program Compensation is made to each member of the Board of Directors (the “Board”) of Allegro MicroSystems, Inc. (the “Company”) who is not an employee of the Company, Sanken Electric Co., Ltd. or their respective subsidiaries (each, an “Eligible Director”). 1. Annual Cash Compensation to Eligible Directors Annual Cash Retainer (Other than B

May 22, 2025 10-K

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

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 March 28, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-39675 ALLEGRO MICROSYST

May 22, 2025 EX-1.01

Conflict Minerals Report of Allegro MicroSystems, Inc. for the year ended December 31, 2024, as required by Items 1.01 and 1.02 of this Form SD

Exhibit 1.01 Allegro MicroSystems, Inc. – 2024 Conflict Minerals Report Introduction This Conflict Minerals Report of Allegro MicroSystems, Inc. (the “Company”, “Allegro”, “we”, or “our”), for the year ended December 31, 2024 (the “Report”), is presented in compliance with Rule 13p-1 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). This Report should be read in conjunction

May 22, 2025 SD

Specialized Disclosure Report (Exact name of the registrant as specified in its charter) _________________________________ Sharon S. Briansky Senior Vice President, General Counsel and Secretary (603) 626-2300 (Name and telephone number, includin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report ALLEGRO MICROSYSTEMS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-39675 (State or Other Jurisdiction of Incorporation) (Commission File Number) 955 Perimeter Road Manchester, New Hampshire 03103 (Address of Principal Executive Offices) (Zip Code) Sharon S.

May 8, 2025 EX-99.1

Allegro MicroSystems Reports Fourth Quarter and Fiscal Year 2025 Results Fourth Quarter Sales Increased 8% Sequentially to $193 Million

Exhibit 99.1 Allegro MicroSystems Reports Fourth Quarter and Fiscal Year 2025 Results Fourth Quarter Sales Increased 8% Sequentially to $193 Million Manchester, NH, May 8, 2025 – Allegro MicroSystems, Inc. (“Allegro” or the “Company”) (Nasdaq: ALGM), a global leader in power and sensing semiconductor solutions for motion control and energy efficient systems, today announced financial results for i

May 8, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 8, 2025 Allegro MicroSystems, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39675 46-2405937 (State or Other Jurisdiction of Incorporation) (Commission

March 12, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 12, 2025 Allegro MicroSystems, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39675 46-2405937 (State or Other Jurisdiction of Incorporation) (Commissi

March 6, 2025 425

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 6, 2025 (March 5, 2025) Date of Report (Date of earliest event reported) ON S

425 FILED BY ON SEMICONDUCTOR CORPORATION PURSUANT TO RULE 425 UNDER THE SECURITIES ACT OF 1933 UNDER THE SECURITIES EXCHANGE ACT OF 1934 SUBJECT COMPANY: ALLEGRO MICROSYSTEMS, INC.

February 24, 2025 EX-10.1

Employment Agreement, dated as of February 23, 2025, by and between Allegro MicroSystems, Inc. and Michael C. Doogue.

Exhibit 10.1 EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (the “Agreement”), entered into and effective as of February 23, 2025 (the “Effective Date”), is made by and between Michael Doogue (“Executive”) and Allegro MicroSystems, Inc., a Delaware corporation (together with any of its subsidiaries and affiliates as may employ Executive from time to time, and any successor(s) thereto, the “Company

February 24, 2025 EX-99.1

Allegro MicroSystems Appoints Mike Doogue as President and Chief Executive Officer

Exhibit 99.1 Allegro MicroSystems Appoints Mike Doogue as President and Chief Executive Officer MANCHESTER, N.H., Feb. 24, 2025 - Allegro MicroSystems, Inc. (“Allegro”) (Nasdaq: ALGM) a global leader in power and sensing semiconductor solutions for motion control and energy-efficient systems, today announced the appointment of Mike Doogue as President and Chief Executive Officer and as a member of

February 24, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 24, 2025 Allegro MicroSyst

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 24, 2025 Allegro MicroSystems, Inc.

February 24, 2025 EX-10.2

Separation Agreement and General Release of Claims, dated as of February 23, 2025, by and between Allegro MicroSystems, Inc. and Vineet Nargolwala.

Exhibit 10.2 SEPARATION AGREEMENT AND GENERAL RELEASE OF CLAIMS This SEPARATION AGREEMENT AND GENERAL RELEASE OF CLAIMS (“Release”) is made by Vineet Nargolwala (“Executive”), a resident of Massachusetts, in favor of Allegro MicroSystems, Inc. (the “Company”), and all related entities, corporations, partnerships and subsidiaries of the Company, as well as each of their current and former directors

February 6, 2025 EX-10.1

Amendment No. 3 to the Credit Agreement by and among Allegro MicroSystems, Inc., Allegro MicroSystems, LLC, Morgan Stanley Senior Funding, Inc. and each lender from time to time party thereto, effective as of February 6, 2025.

Exhibit 10.1 AMENDMENT NO. 3 (this “Amendment”), dated as of February 6, 2025, to the Credit Agreement, dated as of June 21, 2023 (as amended by that certain Amendment No. 1 dated as of October 31, 2023, as further amended by that certain Amendment No. 2 dated as of August 6, 2024 and as further amended, restated, supplemented or otherwise modified from time to time prior to the date hereof, the “

February 6, 2025 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

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, 2025 Allegro MicroSystems, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39675 46-2405937 (State or Other Jurisdiction of Incorporation) (Commis

February 3, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 31, 2025 Allegro MicroSystems, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39675 46-2405937 (State or Other Jurisdiction of Incorporation) (Commis

February 3, 2025 EX-99.1

Allegro MicroSystems Appoints Krishna G. Palepu to its Board of Directors

Exhibit 99.1 Allegro MicroSystems Appoints Krishna G. Palepu to its Board of Directors MANCHESTER, NH, February 3, 2025 – Allegro MicroSystems, Inc. (“Allegro”) (Nasdaq: ALGM) a global leader in power and sensing semiconductor solutions for motion control and energy-efficient systems, today announced the appointment of Krishna G. Palepu, Ross Graham Walker Professor of Business Administration at H

January 31, 2025 10-Q

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

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 December 27, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-39675 ALLEGR

January 30, 2025 EX-99.1

Allegro MicroSystems Reports Third Quarter 2025 Results

Exhibit 99.1 Allegro MicroSystems Reports Third Quarter 2025 Results Manchester, NH, January 30, 2025 – Allegro MicroSystems, Inc. (“Allegro” or the “Company”) (Nasdaq: ALGM), a global leader in power and sensing semiconductor solutions for motion control and energy efficient systems, today announced financial results for its third quarter ended December 27, 2024. “We delivered on our commitments

January 30, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 30, 2025 Allegro MicroSystems, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39675 46-2405937 (State or Other Jurisdiction of Incorporation) (Commis

January 10, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 9, 2025 Allegro MicroSystems, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39675 46-2405937 (State or Other Jurisdiction of Incorporation) (Commiss

January 6, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 6, 2025 Allegro MicroSystems, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39675 46-2405937 (State or Other Jurisdiction of Incorporation) (Commiss

December 23, 2024 8-K

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 23, 2024 Allegro MicroSystems, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39675 46-2405937 (State or Other Jurisdiction of Incorporation) (Commi

November 1, 2024 10-Q

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

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 27, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-39675 ALLEG

November 1, 2024 EX-10.5

Amendment, dated October 31, 2024, to the Employment Agreement, dated May 2, 2022, by and between Allegro MicroSystems, Inc. and Vineet Nargolwala.

Exhibit 10.5 AMENDMENT TO EMPLOYMENT AGREEMENT This Amendment (this “Amendment”) is entered into as of October 31, 2024 (the “Effective Date”) and amends the Employment Agreement (the “Agreement”) entered into as of May 2, 2022 between Vineet Nargolwala (the “Executive”) and Allegro MicroSystems, Inc., a Delaware corporation (together with any of its subsidiaries and affiliates as may employ Execu

October 31, 2024 EX-99.1

Allegro MicroSystems Reports Second Quarter 2025 Results – Sales Increased 12% Sequentially to $187 Million –

Exhibit 99.1 Allegro MicroSystems Reports Second Quarter 2025 Results – Sales Increased 12% Sequentially to $187 Million – Manchester, NH, October 31, 2024 – Allegro MicroSystems, Inc. (“Allegro” or the “Company”) (Nasdaq: ALGM), a global leader in power and sensing semiconductor solutions for motion control and energy efficient systems, today announced financial results for its second quarter end

October 31, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

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, 2024 Allegro MicroSystems, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39675 46-2405937 (State or Other Jurisdiction of Incorporation) (Commis

October 9, 2024 SC 13G

ALGM / Allegro MicroSystems, Inc. / JPMORGAN CHASE & CO - FILING ALLEGRO MICROSYSTEMS, INC. Passive Investment

SC 13G 1 ALLEGROMICROSYSTEMSINC.h.htm FILING ALLEGRO MICROSYSTEMS, INC. UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* ALLEGRO MICROSYSTEMS, INC. (Name of Issuer) Common Stock, par value $0.01 per share (Title of Class of Securities) 01749D105 (CUSIP Number) September 30, 2024 (Date of Event Which Req

October 3, 2024 SC 13G/A

ALGM / Allegro MicroSystems, Inc. / OEP SKNA, L.P. - FORM SC 13G/A Passive Investment

SC 13G/A 1 dp219049sc13ga-3.htm FORM SC 13G/A United States Securities and Exchange Commission Washington, D.C. 20549 Schedule 13G (Rule 13d-102) Information to be Included in Statements Filed Pursuant to§ 240.13d-l(b), (c) and (d) and Amendments Thereto Filed Pursuant to§ 240.13d-2 UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 3)* Allegro Microsystems, Inc. (Name of Issuer) Common Stoc

September 24, 2024 EX-10.1

Amended and Restated Limited Partnership Agreement of Polar Semiconductor, LP, by and among Polar Semiconductor, LP, Polar Semiconductor GP I, LLC, Allegro MicroSystems, Inc., Sanken Electric Co., Ltd., and PS Investment Aggregator, LP dated as of September 20, 2024

Exhibit 10.1 AMENDED AND RESTATED LIMITED PARTNERSHIP AGREEMENT OF POLAR SEMICONDUCTOR, LP THIS AMENDED AND RESTATED LIMITED PARTNERSHIP AGREEMENT (this “Agreement”) of Polar Semiconductor, LP, a Delaware limited partnership (the “Partnership”), is dated September 20, 2024 (the “Effective Date”), by and among the Partnership, Polar Semiconductor GP I, LLC, a Delaware limited liability company and

September 24, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 20, 2024 Allegro MicroSystems, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39675 46-2405937 (State or Other Jurisdiction of Incorporation) (Comm

August 12, 2024 8-K

Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 8, 2024 Allegro MicroSystems, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39675 46-2405937 (State or Other Jurisdiction of Incorporation) (Commissi

August 9, 2024 SC 13G/A

ALGM / Allegro MicroSystems, Inc. / Sanken Electric Co., Ltd. - SC 13G/A Passive Investment

SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 2)* ALLEGRO MICROSYSTEMS, INC. (Name of Issuer) Common Stock, par value $0.01 per share (Title of Class of Securities) 01749D105 (CUSIP Number) July 23, 2024 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to design

August 7, 2024 EX-10.1

Amendment No. 2 to the Credit Agreement by and among Allegro MicroSystems, Inc., Allegro MicroSystems, LLC, Morgan Stanley Senior Funding, Inc. and each lender from time to time party thereto, effective as of August 6, 2024.

Exhibit 10.1 AMENDMENT NO. 2 (this “Amendment”), dated as of August 6, 2024, to the Credit Agreement, dated as of June 21, 2023 (as amended by that certain Amendment No. 1 dated as of October 31, 2023 and as amended, restated, supplemented or otherwise modified from time to time prior to the date hereof, the “Existing Credit Agreement”, and the Existing Credit Agreement as amended by this Amendmen

August 7, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 6, 2024 Allegro MicroSyste

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 6, 2024 Allegro MicroSystems, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39675 46-2405937 (State or Other Jurisdiction of Incorporation) (Commissi

August 2, 2024 EX-10.1

Sale and Subscription Agreement by and among Allegro MicroSystems, Inc., Sanken Electric Co., Ltd., Polar Semiconductor, LLC, and PS Investment Aggregator, L.P., dated as of April 25, 2024.†^

Exhibit 10.1 SALE AND SUBSCRIPTION AGREEMENT dated as of April 25, 2024 among PS INVESTMENT AGGREGATOR, LP, POLAR SEMICONDUCTOR, LLC, SANKEN ELECTRIC CO., LTD., AND ALLEGRO MICROSYSTEMS, INC. TABLE OF CONTENTS Page Article 1 Definitions Section 1.01 Definitions 3 Section 1.02 Other Definitional and Interpretative Provisions 16 Section 1.03 Knowledge 16 Article 2 Issuance of Purchased Units; Closin

August 2, 2024 10-Q

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

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 28, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-39675 ALLEGRO MI

August 1, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 1, 2024 Allegro MicroSystems, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39675 46-2405937 (State or Other Jurisdiction of Incorporation) (Commissi

August 1, 2024 EX-99.1

Allegro MicroSystems Reports First Quarter 2025 Results – Sales of $167 Million Above Mid-point of Our Outlook – – Made $50 Million Voluntary Debt Repayment – – Announced Repurchase of 39 Million Shares From Majority Shareholder –

Exhibit 99.1 Allegro MicroSystems Reports First Quarter 2025 Results – Sales of $167 Million Above Mid-point of Our Outlook – – Made $50 Million Voluntary Debt Repayment – – Announced Repurchase of 39 Million Shares From Majority Shareholder – Manchester, NH, August 1, 2024 – Allegro MicroSystems, Inc. (“Allegro” or the “Company”) (Nasdaq: ALGM), a global leader in power and sensing semiconductor

July 26, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 24, 2024 Allegro MicroSystem

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 24, 2024 Allegro MicroSystems, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39675 46-2405937 (State or Other Jurisdiction of Incorporation) (Commissio

July 26, 2024 EX-1.1

Underwriting Agreement, dated as of July 24, 2024, by and among the Company and the Representatives

EXHIBIT 1.1 25,000,000 Shares of Common Stock ALLEGRO MICROSYSTEMS, INC. UNDERWRITING AGREEMENT July 24, 2024 Barclays Capital Inc. Morgan Stanley & Co. LLC, As Representatives of the several Underwriters named in Schedule I attached hereto, c/o Barclays Capital Inc. 745 Seventh Avenue New York, New York 10019 c/o Morgan Stanley & Co. LLC 1585 Broadway New York, NY 10036 Ladies and Gentlemen: Alle

July 25, 2024 EX-FILING FEES

Calculation of Filing Fee Tables (Form Type) Allegro MicroSystems, Inc. (Exact Name of Registrants as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities

Exhibit 107 Calculation of Filing Fee Tables 424(b)(5) (Form Type) Allegro MicroSystems, Inc.

July 25, 2024 424B5

25,000,000 Shares Allegro MicroSystems, Inc. Common Stock

Filed pursuant to Rule 424(b)(5) Registration No. 333-280960 PROSPECTUS SUPPLEMENT (To Prospectus dated July 23, 2024) 25,000,000 Shares Allegro MicroSystems, Inc. Common Stock We are offering 25,000,000 shares of our common stock. Pursuant to the terms of a share repurchase agreement (the “Share Repurchase Agreement”), we have agreed to repurchase from Sanken (as defined herein) in a privately ne

July 23, 2024 424B5

Subject to Completion, dated July 23, 2024

The information in this preliminary prospectus is not complete and may be changes.

July 23, 2024 EX-FILING FEES

Filing Fee Table.

Exhibit 107 Calculation of Filing Fee Tables Form S-3 (Form Type) Allegro MicroSystems, Inc.

July 23, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 23, 2024 Allegro MicroSystem

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 23, 2024 Allegro MicroSystems, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39675 46-2405937 (State or Other Jurisdiction of Incorporation) (Commissio

July 23, 2024 S-3ASR

As filed with the Securities and Exchange Commission on July 23, 2024

As filed with the Securities and Exchange Commission on July 23, 2024 Registration No.

July 23, 2024 EX-10.2

Second Amended and Restated Stockholders Agreement, dated as of July 23, 2024, between the Company and Sanken.

Exhibit 10.2 SECOND AMENDED AND RESTATED STOCKHOLDERS AGREEMENT OF ALLEGRO MICROSYSTEMS, INC. This SECOND AMENDED AND RESTATED STOCKHOLDERS AGREEMENT (as it may be amended, amended and restated or otherwise modified from time to time in accordance with the terms hereof, this “Agreement”) is entered into by and between Allegro MicroSystems, Inc., a Delaware corporation (the “Corporation”), and Sank

July 23, 2024 EX-10.1

Share Repurchase Agreement, dated as of July 23, 2024, between the Allegro MicroSystems, Inc. and Sanken Electric Co., Ltd. (incorporated by reference from Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on July 23, 2024)

Exhibit 10.1 SHARE REPURCHASE AGREEMENT This Share Repurchase Agreement (this “Agreement”) is entered into as of July 23, 2024, between Allegro MicroSystems, Inc., a Delaware corporation (the “Company”) and Sanken Electric Co., Ltd., a Japanese corporation (“Seller”). Capitalized terms used and not otherwise defined shall have the meanings ascribed to such terms in Section 15. WHEREAS, as of June

July 23, 2024 EX-99.1

Preliminary First Quarter 2025 Results

Exhibit 99.1 Preliminary First Quarter 2025 Results Recent Developments Preliminary Financial Results for the First Quarter Ended June 28, 2024 While the financial closing and financial statement preparation process of Allegro MicroSystems, Inc. (the “Company”, “our”, “us”, “we” or “Allegro”) is in its preliminary stages, Allegro currently expects the following unaudited preliminary financial resu

June 26, 2024 DEFA14A

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

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

June 26, 2024 DEF 14A

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

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

May 23, 2024 EX-19.1

Insider Trading Compliance Policy of Allegro Microsystems, Inc.

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

May 23, 2024 10-K

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

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 March 29, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-39675 ALLEGRO MICROSYST

May 23, 2024 EX-21.1

Subsidiaries of Allegro MicroSystems, Inc.

Exhibit 21.1 Subsidiaries of Allegro MicroSystems, Inc. Name State of Other Jurisdiction of Incorporation or Organization Allegro MicroSystems, LLC Delaware Allegro MicroSystems Argentina, S.A. Argentina Allegro MicroSystems Argentina S.A. Sucursal Uruguay Uruguay Allegro MicroSystems Business Development, Inc. Delaware Allegro MicroSystems Europe Limited United Kingdom Allegro MicroSystems France

May 23, 2024 EX-10.8

Form of Allegro MicroSystems, Inc. Annual Incentive Plan

Exhibit 10.8 ALLEGRO MICROSYSTEMS, INC. ANNUAL INCENTIVE PLAN 1. PURPOSE AND BACKGROUND The purpose of this Annual Incentive Plan (the “Plan”) of Allegro MicroSystems, Inc., which together with all of its direct and indirect subsidiaries is hereinafter referred to as the “Company,” is to foster critical focus on Company financial goals, as well as business unit/functional goals and individual goal

May 23, 2024 EX-10.7

Form of Allegro MicroSystems, Inc. 2020 Omnibus Incentive Compensation Plan

Exhibit 10.7 ALLEGRO MICROSYSTEMS, INC. 2020 OMNIBUS INCENTIVE COMPENSATION PLAN Effective as of the Effective Date (as defined below), the Allegro MicroSystems, Inc. 2020 Omnibus Incentive Compensation Plan (the “Plan”) is hereby established. The purpose of the Plan is to provide employees of Allegro MicroSystems, Inc. (the “Company”) and its subsidiaries, certain consultants and advisors who per

May 23, 2024 EX-97.1

Policy for Recovery of Erroneously Awarded Compensation of Allegro MicroSystems, Inc.

Exhibit 97.1 ALLEGRO MICROSYSTEMS, INC. POLICY FOR RECOVERY OF ERRONEOUSLY AWARDED COMPENSATION Allegro MicroSystems, Inc. (the “Company”) has adopted this Policy for Recovery of Erroneously Awarded Compensation (the “Policy”), effective as of October 2, 2023 (the “Effective Date”). Capitalized terms used in this Policy but not otherwise defined herein are defined in Section 11. 1. Persons Subject

May 13, 2024 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report ALLEGRO MICROSYSTEMS, 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 ALLEGRO MICROSYSTEMS, INC. (Exact name of the registrant as specified in its charter) Delaware 001-39675 (State or Other Jurisdiction of Incorporation) (Commission File Number) 955 Perimeter Road Manchester, New Hampshire 03103 (Address of Principal Executive Offices) (Zip Code) Sharon S.

May 13, 2024 EX-1.01

Conflict Minerals Report of Allegro MicroSystems, Inc. for the year ended December 31, 2023, as required by Items 1.01 and 1.02 of this Form SD

Exhibit 1.01 Allegro MicroSystems, Inc. – 2023 Conflict Minerals Report Introduction This Conflict Minerals Report of Allegro MicroSystems, Inc. (the “Company”, “Allegro”, “we”, or “our”), for the year ended December 31, 2023 (the “Report”), is presented in compliance with Rule 13p-1 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). This Report should be read in conjunction

May 9, 2024 EX-99.1

Allegro MicroSystems Reports Fourth Quarter and Fiscal Year 2024 Results – Full Year 2024 Sales Increase 8% to a Record $1.05 Billion –38% Growth in E-Mobility Drives 17% Year-over-Year Increase in Full Year 2024 Automotive Sales –

Exhibit 99.1 Allegro MicroSystems Reports Fourth Quarter and Fiscal Year 2024 Results – Full Year 2024 Sales Increase 8% to a Record $1.05 Billion –38% Growth in E-Mobility Drives 17% Year-over-Year Increase in Full Year 2024 Automotive Sales – Manchester, NH, May 9, 2024 – Allegro MicroSystems, Inc. (“Allegro” or the “Company”) (Nasdaq:ALGM), a global leader in power and sensing semiconductor sol

May 9, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 9, 2024 Allegro MicroSystems, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39675 46-2405937 (State or Other Jurisdiction of Incorporation) (Commission

April 25, 2024 EX-10.1

Sale and Subscription Agreement by and among Allegro MicroSystems, Inc., Sanken Electric Co., Ltd., Polar Semiconductor, LLC, and PS Investment Aggregator, L.P., dated as of April 25, 2024

Exhibit 10.1 SALE AND SUBSCRIPTION AGREEMENT dated as of April 25, 2024 among PS INVESTMENT AGGREGATOR, LP, POLAR SEMICONDUCTOR, LLC, SANKEN ELECTRIC CO., LTD., AND ALLEGRO MICROSYSTEMS, INC. TABLE OF CONTENTS Page Article 1 Definitions Section 1.01 Definitions 3 Section 1.02 Other Definitional and Interpretative Provisions 16 Section 1.03 Knowledge 16 Article 2 Issuance of Purchased Units; Closin

April 25, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 25, 2024 Allegro MicroSystems, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39675 46-2405937 (State or Other Jurisdiction of Incorporation) (Commissi

April 3, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

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 1, 2024 Allegro MicroSystems, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39675 46-2405937 (State or Other Jurisdiction of Incorporation) (Commissio

April 3, 2024 EX-99.1

Allegro MicroSystems Appoints Jennie Raubacher to its Board of Directors

Exhibit 99.1 Allegro MicroSystems Appoints Jennie Raubacher to its Board of Directors MANCHESTER, NH, April 3, 2024 – Allegro MicroSystems, Inc. (“Allegro”) (Nasdaq: ALGM) a global leader in power and sensing semiconductor solutions for motion control and energy-efficient systems, today announced the appointment of Jennie Raubacher to Allegro’s Board of Directors (“Board”) as an independent direct

March 4, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

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 29, 2024 Allegro MicroSystems, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39675 46-2405937 (State or Other Jurisdiction of Incorporation) (Commi

February 6, 2024 10-Q

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

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 December 29, 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: 001-39675 ALLEGR

February 1, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 1, 2024 Allegro MicroSystems, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39675 46-2405937 (State or Other Jurisdiction of Incorporation) (Commis

February 1, 2024 EX-99.1

Allegro MicroSystems Reports Third Quarter 2024 Results –Total Sales Increased 2% Year-over-Year – –E-Mobility Drives 18% Year-over-Year Increase in Automotive Sales –

Exhibit 99.1 Allegro MicroSystems Reports Third Quarter 2024 Results –Total Sales Increased 2% Year-over-Year – –E-Mobility Drives 18% Year-over-Year Increase in Automotive Sales – Manchester, NH, February 1, 2024 – Allegro MicroSystems, Inc. (“Allegro” or the “Company”) (Nasdaq:ALGM), a global leader in power and sensing semiconductor solutions for motion control and energy efficient systems, tod

January 30, 2024 SC 13G/A

ALGM / Allegro MicroSystems, Inc. / OEP SKNA, L.P. - FORM SC 13G/A Passive Investment

United States Securities and Exchange Commission Washington, D.C. 20549 Schedule 13G (Rule 13d-102) Information to be Included in Statements Filed Pursuant to§ 240.13d-l(b), (c) and (d) and Amendments Thereto Filed Pursuant to§ 240.13d-2 UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 2)* Allegro Microsystems, Inc. (Name of Issuer) Common Stock, par value $0.01 per share (Title of Class o

November 6, 2023 10-Q

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

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 29, 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: 001-39675 ALLEG

November 2, 2023 EX-99.1

Allegro MicroSystems Reports Second Quarter 2024 Results – Net Sales Increased by 16% Year-over-Year – – GAAP & Non-GAAP EPS Increased 31% and 29% Respectively, Year-over-Year – – Automotive Sales Increased by 31% Year-over-Year Led by E-Mobility –

Exhibit 99.1 Allegro MicroSystems Reports Second Quarter 2024 Results – Net Sales Increased by 16% Year-over-Year – – GAAP & Non-GAAP EPS Increased 31% and 29% Respectively, Year-over-Year – – Automotive Sales Increased by 31% Year-over-Year Led by E-Mobility – Manchester, NH, November 2, 2023 – Allegro MicroSystems, Inc. (“Allegro” or the “Company”) (Nasdaq:ALGM), a global leader in power and sen

November 2, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 2, 2023 Allegro MicroSystems, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39675 46-2405937 (State or Other Jurisdiction of Incorporation) (Commis

November 1, 2023 EX-99.1

Allegro MicroSystems Completes Acquisition of Crocus Technology to Accelerate Innovation in TMR Sensing Technology - Tunnel Magnetoresistance (“TMR”) Represents Fastest Growing Technology in Magnetic Sensing with an Estimated 30% CAGR Through 2030 -

Exhibit 99.1 Allegro MicroSystems Completes Acquisition of Crocus Technology to Accelerate Innovation in TMR Sensing Technology - Tunnel Magnetoresistance (“TMR”) Represents Fastest Growing Technology in Magnetic Sensing with an Estimated 30% CAGR Through 2030 - MANCHESTER, NH, October 31, 2023 – Allegro MicroSystems, Inc. (“Allegro”) (Nasdaq: ALGM) a global leader in power and sensing semiconduct

November 1, 2023 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Termination of a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Completion of Acquisition or Disposition of Assets

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, 2023 Allegro MicroSystems, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39675 46-2405937 (State or Other Jurisdiction of Incorporation) (Commis

November 1, 2023 EX-10.1

First Amendment to Revolving Facility Credit Agreement, dated October 31, 2023, by and among Allegro MicroSystems, Inc., as borrower, Morgan Stanley Senior Funding, Inc., as administrative agent and collateral agent, and the other lenders from time to time party thereto (incorporated by reference from Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on November 1, 2023)

EX-10.1 2 algm-ex101.htm EX-10.1 Exhibit 10.1 AMENDMENT NO. 1 (this “Amendment”), dated as of October 31, 2023, to the Credit Agreement, dated as of June 21, 2023 (as amended, restated, supplemented or otherwise modified from time to time prior to the date hereof, the “Existing Credit Agreement”), among Allegro MicroSystems, Inc., as Borrower (the “Borrower”), Morgan Stanley Senior Funding, Inc. (

October 19, 2023 EX-99.1

Allegro MicroSystems Appoints Mary Puma to its Board of Directors Mary Puma joined the Allegro board effective October 18, 2023 to fill the vacancy created by the retirement of Dr. Reza Kazerounian

Exhibit 99.1 Allegro MicroSystems Appoints Mary Puma to its Board of Directors Mary Puma joined the Allegro board effective October 18, 2023 to fill the vacancy created by the retirement of Dr. Reza Kazerounian MANCHESTER, NH, October 19, 2023 – Allegro MicroSystems, Inc. (“Allegro”) (Nasdaq: ALGM) a global leader in power and sensing semiconductor solutions for motion control and energy-efficient

October 19, 2023 8-K

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 15, 2023 Allegro MicroSystems, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39675 46-2405937 (State or Other Jurisdiction of Incorporation) (Commis

September 21, 2023 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 21, 2023 Allegro MicroSystems, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39675 46-2405937 (State or Other Jurisdiction of Incorporation) (Comm

August 8, 2023 EX-2.1

Agreement and Plan of Merger by and among Allegro MicroSystems, Inc. (for purposes of Section 5.15 and applicable provisions of Article IX thereof only), Allegro MicroSystems, LLC, Silicon Structures LLC, Crocus Technology International Corp. and NanoDimension Management Limited, as the Representative, dated as of August 7, 2023 (incorporated by reference from Exhibit 2.1 to the Company’s Current Report on Form 8-K filed on August 8, 2023)

Exhibit 2.1 EXECUTION VERSION AGREEMENT AND PLAN OF MERGER BY AND AMONG ALLEGRO MICROSYSTEMS, LLC, SILICON STRUCTURES LLC, CROCUS TECHNOLOGY INTERNATIONAL CORP., AND NANODIMENSION MANAGEMENT LIMITED, SOLELY IN ITS CAPACITY AS REPRESENTATIVE AND For purposes of Section ‎5.15 and applicable provisions of ‎Article IX only ALLEGRO MICROSYSTEMS, INC. Dated as of August 7, 2023 TABLE OF CONTENTS Page Ar

August 8, 2023 EX-99.2

August 8, 2023 INVESTOR PRESENTATION

Exhibit 99.2 August 8, 2023 INVESTOR PRESENTATION Forward - looking statements This presentation and the accompanying oral remarks contain forward - looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 . We intend such forward - looking statements to be covered by the safe harbor provisions for forward - looking statements contained in Section 27 A of the S

August 8, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 8, 2023 (August 7, 2023) ALL

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 8, 2023 (August 7, 2023) ALLEGRO MICROSYSTEMS, INC.

August 8, 2023 EX-99.1

Allegro MicroSystems to Acquire Crocus Technology to Accelerate Innovation in TMR Sensing Technology -- Tunnel Magnetoresistance (“TMR”) Represents Fastest Growing Technology in Magnetic Sensing Approaching $1B SAM by 2030 --

Exhibit 99.1 FOR IMMEDIATE RELEASE August 8, 2023 Contact: Jalene Hoover VP of IR & Corporate Communications Phone: +1 512 751-6526 [email protected] Allegro MicroSystems to Acquire Crocus Technology to Accelerate Innovation in TMR Sensing Technology - Tunnel Magnetoresistance (“TMR”) Represents Fastest Growing Technology in Magnetic Sensing Approaching $1B SAM by 2030 - Manchester, N.H., A

August 4, 2023 EX-10.5

Term Loan Credit Agreement - First Amendment, dated as of June 28, 2023, by and between Allegro MicroSystems, Inc. and Credit Suisse AG, Cayman Islands Branch (incorporated by reference from Exhibit 10.5 to the Company’s Quarterly Report on Form 10-Q filed on August 4, 2023)

Execution Version FIRST AMENDMENT This FIRST AMENDMENT (this “Agreement”), dated as of June 28, 2023, is made by and between Allegro MicroSystems, Inc.

August 4, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 3, 2023 ALLEGRO MICROSYSTE

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 3, 2023 ALLEGRO MICROSYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware 001-39675 46-2405937 (State or other jurisdiction of incorporation) (Commissi

August 4, 2023 10-Q

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-39675 ALLEGRO MI

August 1, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 1, 2023 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-39675 46-2405937 (State or other jurisdiction of incorporation or organiz

August 1, 2023 EX-99.1

Allegro MicroSystems Reports First Quarter 2024 Results --Net Sales increased by 28% Year-over-Year to a New Record-- --Net Sales in Strategic Growth Areas Increased by 63% Year-over-Year-- --GAAP Diluted Earnings Per Share (EPS) increased by 520% Ye

Exhibit 99.1 Allegro MicroSystems Reports First Quarter 2024 Results -Net Sales increased by 28% Year-over-Year to a New Record- -Net Sales in Strategic Growth Areas Increased by 63% Year-over-Year- -GAAP Diluted Earnings Per Share (EPS) increased by 520% Year-over-Year- -Non-GAAP Diluted EPS increased by 63% Year-over-Year- Manchester, NH, August 1, 2023 – Allegro MicroSystems, Inc. (“Allegro” or

June 23, 2023 EX-10.1

Revolving Facility Credit Agreement, dated as of June 21, 2023, by and among Allegro MicroSystems, Inc., as borrower, Morgan Stanley Senior Funding, Inc. as administrative agent and collateral agent, and the other lenders from time to time party thereto (incorporated by reference from Exhibit 10.1 to the Company’s Current Report on Form 8-K Filed on June 23, 2023)

Exhibit 10.1 CREDIT AGREEMENT dated as of June 21, 2023 by and among Allegro MicroSystems, Inc., as Borrower Morgan Stanley Senior Funding, Inc., as Administrative Agent, Morgan Stanley Senior Funding, Inc., as Collateral Agent and THE LENDERS PARTY HERETO Morgan Stanley Senior Funding, Inc., BofA Securities, Inc., Credit Suisse Loan Funding LLC, JPMorgan Chase Bank, N.A., Mizuho Bank, Ltd., Sumit

June 23, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 21, 2023 ALLEGRO MICROSYSTEM

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 21, 2023 ALLEGRO MICROSYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware 001-39675 46-2405937 (State or other jurisdiction of incorporation or organiza

June 21, 2023 DEFA14A

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

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

June 21, 2023 DEF 14A

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

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

May 30, 2023 EX-1.01

Conflict Minerals Report of Allegro MicroSystems, Inc. for the year ended December 31, 2022, as required by Items 1.01 and 1.02 of this Form SD.

Exhibit 1.01 Allegro MicroSystems, Inc. – 2022 Conflict Minerals Report Introduction This Conflict Minerals Report of Allegro MicroSystems, Inc. (the “Company”, “Allegro”, “we”, or “our”), for the year ended December 31, 2022 (the “Report”), is presented in compliance with Rule 13p-1 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). This Report should be read in conjunction

May 30, 2023 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM SD Specialized Disclosure Report ALLEGRO MICROSYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware 001-39675 (State or other jurisdiction of incorpo

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM SD Specialized Disclosure Report ALLEGRO MICROSYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware 001-39675 (State or other jurisdiction of incorporation or organization) (Commission File Number) 955 Perimeter Road Manchester, New Hampshire 03103 (Address of principal executive offices) (Zip Code

May 25, 2023 EX-21.1

Subsidiaries of Allegro MicroSystems, Inc.

Exhibit 21.1 Subsidiaries of Allegro MicroSystems, Inc. Name State of Other Jurisdiction of Incorporation or Organization Allegro MicroSystems, LLC Delaware Allegro MicroSystems Argentina, S.A. Argentina Allegro MicroSystems Argentina S.A. Sucursal Uruguay Uruguay Allegro MicroSystems Business Development, Inc. Delaware Allegro MicroSystems Europe Limited United Kingdom Allegro MicroSystems France

May 25, 2023 EX-10.19

Form of Restricted Stock Unit Agreement under Allegro MicroSystems, Inc. 2020 Omnibus Incentive Compensation Plan (Executives) (incorporated by reference from Exhibit 10.19 to the Company’s Annual Report on Form 10-K filed on May 25, 2023)

Exhibit 10.19 ALLEGRO MICROSYSTEMS, INC. 2020 OMNIBUS INCENTIVE COMPENSATION PLAN RESTRICTED STOCK UNIT AGREEMENT This RESTRICTED STOCK UNIT AGREEMENT, including the Notice of Grant (the “Agreement”), dated as of (the “Date of Grant”), is delivered by Allegro MicroSystems, Inc. (the “Company”) to (the “Participant”). RECITALS The Allegro MicroSystems, Inc. 2020 Omnibus Incentive Compensation Plan

May 25, 2023 EX-10.22

Form of Performance Stock Unit Agreement under Allegro MicroSystems, Inc. 2020 Omnibus Incentive Compensation Plan (incorporated by reference from Exhibit 10.22 to the Company’s Annual Report on Form 10-K filed on May 25, 2023)

Exhibit 10.22 ALLEGRO MICROSYSTEMS, INC. 2020 OMNIBUS INCENTIVE COMPENSATION PLAN PERFORMANCE STOCK UNIT AGREEMENT This PERFORMANCE STOCK UNIT AGREEMENT, including the Notice of Grant (the “Agreement”), dated as of (the “Date of Grant”), is delivered by Allegro MicroSystems, Inc. (the “Company”) to (the “Participant”). RECITALS The Allegro MicroSystems, Inc. 2020 Omnibus Incentive Compensation Pla

May 25, 2023 EX-10.32

Form of Severance Agreement between Allegro MicroSystems, Inc. and its executive officers (incorporated by reference from Exhibit 10.32 to the Company’s Annual Report on Form 10-K filed on May 25, 2023)

Exhibit 10.32 FORM OF SEVERANCE AGREEMENT THIS AGREEMENT (the “Agreement”) is entered into as of , 20 between Allegro MicroSystems, LLC, a Delaware limited liability company (“Allegro”), and (“Executive”). WHEREAS, Allegro wishes to ensure that Allegro executives will continue to exert maximum effort toward the success of the Company and to continue their employment with Allegro, without undue con

May 25, 2023 10-K

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

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 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: 001-39675 ALLEGRO MICROSYST

May 25, 2023 EX-3.2

Second Amended and Restated Bylaws of Allegro MicroSystems, Inc. (incorporated by reference from Exhibit 3.2 to the Company’s Annual Report on Form 10-K filed on May 25, 2023)

Exhibit 3.2 Second Amended and Restated Bylaws of ALLEGRO MICROSYSTEMS, INC. (a Delaware corporation) TABLE OF CONTENTS Page Article I - Corporate Offices 1 1.1 Registered Office 1 1.2 Other Offices 1 Article II - Meetings of Stockholders 1 2.1 Place of Meetings 1 2.2 Annual Meeting 1 2.3 Special Meeting 1 2.4 Advance Notice Procedures for Business Brought before a Meeting 2 2.5 Advance Notice Pro

May 25, 2023 EX-10.31

Amendment to Severance Agreement, dated as of May 15, 2023, by and between Allegro MicroSystems, Inc. and Sharon S. Briansky

Exhibit 10.31 ALLEGRO MICROSYSTEMS, LLC AMENDMENT TO SEVERANCE AGREEMENT This Amendment (this “Amendment”) is entered into as of May 15, 2023 (the “Effective Date”) between Sharon Briansky, Senior Vice President, General Counsel and Corporate Secretary (“Executive”) and Allegro MicroSystems, LLC (the “Company”) and amends the Severance Agreement between the Executive and the Company dated January

May 25, 2023 EX-10.29

Amendment to Severance Agreement, dated as of May 15, 2023, by and between Allegro MicroSystems, Inc. and Derek D’Antilio

Exhibit 10.29 ALLEGRO MICROSYSTEMS, LLC AMENDMENT TO SEVERANCE AGREEMENT This Amendment (this “Amendment”) is entered into as of May 15, 2023 (the “Effective Date”) between Derek D’Antilio, Senior Vice President, CFO and Treasurer (“Executive”) and Allegro MicroSystems, LLC (the “Company”) and amends the Severance Agreement between the Executive and the Company dated January 10, 2022 (the “Origina

May 10, 2023 EX-99.1

Allegro MicroSystems Reports Fourth Quarter and Fiscal Year 2023 Results Fourth Quarter Sales increased by 35% and GAAP Earnings Per Share (EPS) increased by 138% Year-over-Year -- -- Annual Sales increased by 27% and GAAP EPS increased by 56% Year-o

Exhibit 99.1 Allegro MicroSystems Reports Fourth Quarter and Fiscal Year 2023 Results - Fourth Quarter Sales increased by 35% and GAAP Earnings Per Share (EPS) increased by 138% Year-over-Year - - Annual Sales increased by 27% and GAAP EPS increased by 56% Year-over-Year - - Continued Growth in Automotive and Industrial Drove Record Sales for the Fourth Quarter & Full Year - Manchester, NH, May 10

May 10, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 10, 2023 ALLEGRO MICROSYSTEMS

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 10, 2023 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-39675 46-2405937 (State or other jurisdiction of incorporation or organizat

April 5, 2023 EX-10.2

to the Company’s Current Report on Form 8-K filed on April 5, 2023)

Exhibit 10.2 [XXX] Certain information in this document has been excluded pursuant to Regulation S-K, Item 601(b)(10). Such excluded information is not material and would likely cause competitive harm to the registrant if publicly disclosed. DISTRIBUTION AGREEMENT THIS DISTRIBUTION AGREEMENT is entered into April 1, 2023 (the “Effective Date”) by and between Sanken Electric, Co., Ltd., located at

April 5, 2023 EX-10.3

Agreement by and between Allegro MicroSystems,

Exhibit 10.3 [XXX] Certain information in this document has been excluded pursuant to Regulation S-K, Item 601(b)(10). Such excluded information is not material and would likely cause competitive harm to the registrant if publicly disclosed. Consulting Agreement THIS CONSULTING AGREEMENT is entered into this 1st day of April 2023 (the “Effective Date”) by and between Sanken Electric, Co., Ltd., lo

April 5, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 30, 2023 ALLEGRO MICROSYSTE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 30, 2023 ALLEGRO MICROSYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware 001-39675 46-2405937 (State or other jurisdiction of incorporation or organiz

April 5, 2023 EX-10.1

Sanken Electric Co., Ltd., effective March 31, 2023

Exhibit 10.1 TERMINATION OF THE DISTRIBUTION AGREEMENT THIS TERMINATION OF THE DISTRIBUTION AGREEMENT is entered into this 31st day of March 2023 (the “Effective Date”) by and between Sanken Electric, Co., Ltd., located at 3-6-3 Kitano, Niiza-shi, Saitama, Japan (“SANKEN”), and Allegro MicroSystems, Inc, located at 955 Perimeter Road, Manchester, New Hampshire 03103, U.S.A. (“ALLEGRO”). WHEREAS, S

February 22, 2023 EX-10.1

Allegro MicroSystems, LLC and Thomas C. Teebagy, Jr

Exhibit 10.1 Allegro MicroSystems, Inc. 955 Perimeter Road Manchester, New Hampshire 03103 February 16, 2023 Thomas C. Teebagy, Jr. Re: Retirement Separation Letter Agreement Dear Tom: Allegro MicroSystems, Inc., (the “Company”) is most grateful for your dedication, commitment, and significant contributions to the Company. The Company has a strong desire to support you as you plan for your retirem

February 22, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 16, 2023 ALLEGRO MICROSY

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 16, 2023 ALLEGRO MICROSYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware 001-39675 46-2405937 (State or other jurisdiction of incorporation or orga

February 1, 2023 EX-10.3

Amended and Restated Severance Agreement, dated as of February 15, 2021, by and between Allegro MicroSystems, LLC, Allegro MicroSystems, Inc. and Suman Narayan.

Exhibit 10.3 SEVERANCE AGREEMENT THIS AGREEMENT (the "Agreement") is entered into as of February 15th, 2021 between Allegro MicroSystems, LLC, a Delaware limited liability company("Allegro") and Suman Narayan, VP, Magnetic Sensor Business Unit of Allegro ("Executive"). WHEREAS, Allegro wishes to ensure that Allegro executives will continue to exert maximum effort toward the success of the Company

February 1, 2023 10-Q

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

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 December 23, 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: 001-39675 ALLEGR

February 1, 2023 EX-10.4

Amended and Restated Severance Agreement, dated as of September 30, 2020, by and between Allegro MicroSystems, LLC, Allegro MicroSystems, Inc. and Thomas Teebagy, Sr.

Exhibit 10.4 Execution Version AMENDED AND RESTATED SEVERANCE AGREEMENT THIS AGREEMENT (the “Agreement”) is entered into as of September 30, 2020 between Allegro MicroSystems, LLC, a Delaware limited liability company (“Allegro”), and Thomas Teebagy, Sr. VP, Operations & Quality of Allegro (“Executive”). WHEREAS, if there occurs a registered initial public offering of securities of Allegro MicroSy

February 1, 2023 EX-10.2

Summary of Allegro MicroSystems, Inc. Non-Employee Director Compensation.

Exhibit 10.2 Summary of Annual Non-Management Director Compensation Compensation is made to each member of the Board who is not an employee of the Company, OEP SKNA, L.P. or Sanken Electric Co., Ltd or their respective subsidiaries. 1.Annual Cash Compensation Annual Cash Retainer (Other than Chairman of the Board) $ 60,000 Annual Cash Retainer (Chairman of the Board) $ 75,000 Additional Cash Retai

February 1, 2023 EX-10.6

Wafer Foundry Agreement, effective January 26, 2023, by and between Allegro MicroSystems, Inc. and Polar Semiconductor, LLC (incorporated by reference from Exhibit 10.6 to the Company’s Quarterly Report on Form 10-Q filed on February 1, 2023)

Exhibit 10.6 [XXX] Certain information in this document has been excluded pursuant to Regulation S-K, Item 601(b)(10). Such excluded information is not material and would likely cause competitive harm to the registrant if publicly disclosed. WAFER FOUNDRY AGREEMENT This Wafer Foundry Agreement (this “Agreement”) is made and entered into as of January 26, 2023 (the “Effective Date”) by and between

February 1, 2023 EX-10.5

Amended and Restated Severance Agreement, dated as of September 30, 2020, by and between Allegro MicroSystems, LLC, Allegro MicroSystems, Inc. and Joanne Valente.

Exhibit 10.5 Execution Version AMENDED AND RESTATED SEVERANCE AGREEMENT THIS AGREEMENT (the “Agreement”) is entered into as of September 30, 2020 between Allegro MicroSystems, LLC, a Delaware limited liability company (“Allegro”) and Joanne Valente, VP Global Human Resources of Allegro (“Executive”). WHEREAS, if there occurs a registered initial public offering of securities of Allegro MicroSystem

January 31, 2023 EX-99.1

Allegro MicroSystems Reports Fiscal Third Quarter 2023 Results Achieves Record Quarter with Sales Increasing 33% and Earnings Expanding 96% Y-o-Y Led By Continued Strength in E-Mobility

Exhibit 99.1 Allegro MicroSystems Reports Fiscal Third Quarter 2023 Results Achieves Record Quarter with Sales Increasing 33% and Earnings Expanding 96% Y-o-Y Led By Continued Strength in E-Mobility Manchester, NH, January 31, 2023 – Allegro MicroSystems, Inc. (“Allegro” or the “Company”) (Nasdaq:ALGM), a global leader in sensing and power semiconductor solutions for motion control and energy effi

January 31, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 31, 2023 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-39675 46-2405937 (State or other jurisdiction of incorporation or organ

November 17, 2022 8-K

Termination of a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 10, 2022 ALLEGRO MICROSYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware 001-39675 46-2405937 (State or other jurisdiction of incorporation or orga

October 31, 2022 10-Q

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

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 23, 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: 001-39675 ALLEG

October 27, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 27, 2022 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-39675 46-2405937 (State or other jurisdiction of incorporation or organ

October 27, 2022 EX-99.1

Allegro MicroSystems Reports Second Quarter 2023 Results Achieves Record Quarter with Sales Increasing 23% and Earnings Expanding 52% Year-over-Year

Exhibit 99.1 Allegro MicroSystems Reports Second Quarter 2023 Results Achieves Record Quarter with Sales Increasing 23% and Earnings Expanding 52% Year-over-Year Manchester, NH, October 27, 2022 ? Allegro MicroSystems, Inc. (?Allegro? or the ?Company?) (Nasdaq:ALGM), a global leader in power and sensing semiconductor solutions for motion control and energy efficient systems, today announced financ

October 3, 2022 8-K

Entry into a Material Definitive Agreement, Termination of a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 29, 2022 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-39675 46-2405937 (State or other jurisdiction of incorporation or org

October 3, 2022 EX-10.1

Transition Agreement by and among Allegro MicroSystems, Inc. and Sanken Electric Co., Ltd., dated as of September 29, 2022

Exhibit 10.1 [XXX] Certain information in this document has been excluded pursuant to Regulation S-K, Item 601(b)(10). Such excluded information is not material and would likely cause competitive harm to the registrant if publicly disclosed. TRANSITION AGREEMENT FOR SANKEN-ALLEGRO DISTRIBUTION AGREEMENT This TRANSITION AGREEMENT (this ?Agreement?) is made and entered into as of September 29, 2022

September 1, 2022 8-K

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 1, 2022 ALLEGRO MICROSYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware 001-39675 46-2405937 (State or other jurisdiction of incorporation) (Commi

August 29, 2022 10-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K/A (AMENDMENT NO. 1)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K/A (AMENDMENT NO. 1) (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended March 25, 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: 001-396

August 5, 2022 8-K

Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 4, 2022 ALLEGRO MICROSYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware 001-39675 46-2405937 (State or other jurisdiction of incorporation) (Commissi

August 1, 2022 10-Q

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

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 24, 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: 001-39675 ALLEGRO MI

August 1, 2022 EX-10.4

Separation Agreement and General Release, dated December 17, 2021, by and between Allegro MicroSystems, Inc. and Christopher Brown.

Exhibit 10.4 Allegro Microsystems, Inc. 955 Perimeter Road Manchester, New Hampshire 03103 November 23, 2021 PERSONAL & CONFIDENTIAL BY EMAIL ([email protected]) Christopher Brown 102 Ellicott St Needham, MA 02492 RE: Separation Agreement and General Release Dear Chris: This letter outlines the terms of your separation from employment with Allegro MicroSystems, Inc. (the "Company"), as

July 28, 2022 EX-99.1

Allegro MicroSystems Reports First Quarter 2023 Results --Company Achieves New Quarterly Sales Record--

Exhibit 99.1 Allegro MicroSystems Reports First Quarter 2023 Results -Company Achieves New Quarterly Sales Record- Manchester, NH, July 28, 2022 ? Allegro MicroSystems, Inc. (?Allegro? or the ?Company?) (Nasdaq:ALGM), a global leader in power and sensing semiconductor solutions for motion control and energy efficient systems, today announced financial results for its first quarter 2023 that ended

July 28, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 28, 2022 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-39675 46-2405937 (State or other jurisdiction of incorporation or organiza

June 22, 2022 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

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

June 22, 2022 DEF 14A

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

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

June 21, 2022 EX-10.1

, by and among Allegro MicroSystems, Inc., Sanken Electric Co., Ltd. and OEP SKNA, L.P. (incorporated by reference from Exhibit

Exhibit 10.1 AMENDED AND RESTATED STOCKHOLDERS AGREEMENT OF ALLEGRO MICROSYSTEMS, INC. This AMENDED AND RESTATED STOCKHOLDERS AGREEMENT (as it may be amended, amended and restated or otherwise modified from time to time in accordance with the terms hereof, this ?Agreement?) is entered into by and among Allegro Microsystems, Inc., a Delaware corporation (the ?Corporation?), OEP SKNA, L.P., a Cayman

June 21, 2022 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 16, 2022 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-39675 46-2405937 (State or other jurisdiction of incorporation or organiza

June 10, 2022 EX-16.1

Letter of Grant Thornton LLP, dated June 9, 2022

EX-16.1 2 exhibit161.htm EX-16.1 Exhibit 16.1 June 9, 2022 U.S. Securities and Exchange Commission Office of the Chief Accountant 100 F Street, NE Washington, DC 20549 Re: Allegro MicroSystems, Inc. File No. 001-39675 Dear Sir or Madam: We have read Item 4.01 of Form 8-K of Allegro MicroSystems, Inc. dated June 7, 2022, and agree with the statements concerning our Firm contained therein. Very trul

June 10, 2022 8-K

Financial Statements and Exhibits, Changes in Registrant's Certifying Accountant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 7, 2022 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-39675 46-2405937 (State or other jurisdiction of incorporation or organizat

May 18, 2022 EX-10.33

Summary of Allegro MicroSystems, Inc. Non-Employee Director Compensation

Exhibit 10.33 Summary of Annual Non-Management Director Compensation Compensation is made to each member of the Board who is not an employee of the Company, OEP SKNA, L.P. or Sanken Electric Co., Ltd or their respective subsidiaries. 1.Annual Cash Compensation Annual Cash Retainer (Other than Chairman of the Board) $ 60,000 Annual Cash Retainer (Chairman of the Board) $ 75,000 Additional Cash Reta

May 18, 2022 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 March 25, 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: 001-39675 ALLEGRO MICROSYSTEMS, INC.

May 18, 2022 EX-21.1

Subsidiaries of Allegro MicroSystems, Inc.

Exhibit 21.1 Subsidiaries of Allegro MicroSystems, Inc. Name State of Other Jurisdiction of Incorporation or Organization Allegro MicroSystems, LLC Delaware Allegro MicroSystems Argentina, S.A. Argentina Allegro MicroSystems Argentina S.A. Sucursal Uruguay Uruguay Allegro MicroSystems Business Development, Inc. Delaware Allegro MicroSystems Europe Limited United Kingdom Allegro MicroSystems France

May 9, 2022 EX-99.1

Allegro MicroSystems Reports Fourth Quarter and Fiscal Year 2022 Results —Company Achieves Record Revenue and Profitability for the Fourth Quarter and Full Year—

Exhibit 99.1 Allegro MicroSystems Reports Fourth Quarter and Fiscal Year 2022 Results ?Company Achieves Record Revenue and Profitability for the Fourth Quarter and Full Year? Manchester, NH, May 9, 2022 ? Allegro MicroSystems, Inc. (?Allegro? or the ?Company?) (Nasdaq:ALGM), a global leader in power and sensing semiconductor solutions for motion control and energy efficient systems, today announce

May 9, 2022 EX-10.2

Letter Agreement, dated May 6, 2022, between Allegro MicroSystems, Inc. and Ravi Vig (incorporated by reference from Exhibit 10.2 to the Company’s Current Report on Form 8-K filed on May 9, 2022)

Exhibit 10.2 Allegro MicroSystems, Inc. 955 Perimeter Road Manchester, New Hampshire 03103 May 6, 2022 Ravi Vig Re: Employment Transition Dear Ravi: Allegro MicroSystems, Inc., (the ?Company,? and together with any of its subsidiaries and affiliates, the ?Company Group?) is grateful for your contributions and many years of dedicated service and wishes you well in your transition out of the Company

May 9, 2022 8-K

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, 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 6, 2022 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-39675 46-2405937 (State or other jurisdiction of incorporation) (Commission

May 9, 2022 EX-99.2

Allegro MicroSystems Announces CEO Retirement and Appointment of Successor —Former Sensata Technologies Executive Brings Over 25 Years of Technology Leadership—

Exhibit 99.2 Allegro MicroSystems Announces CEO Retirement and Appointment of Successor ?Former Sensata Technologies Executive Brings Over 25 Years of Technology Leadership? Manchester, NH, May 9, 2022 ? Allegro MicroSystems, Inc. (?Allegro? or the ?Company?) (Nasdaq: ALGM), a global leader in power and sensing semiconductor solutions for motion control and energy efficient systems, today announce

May 9, 2022 EX-10.1

Second Amended and Restated Severance Agreement, dated May 6, 2022, by and between Allegro MicroSystems, Inc. and Ravi Vig (incorporated by reference from Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on May 9, 2022)

Exhibit 10.1 President and CEO SECOND AMENDED AND RESTATED SEVERANCE AGREEMENT THIS AGREEMENT (the ?Agreement?) is entered into as of May 6, 2022 between Allegro MicroSystems, LLC, a Delaware limited liability company (?Allegro?), and Ravi Vig, President and Chief Executive Officer of Allegro (?Executive?). WHEREAS, Allegro and Executive are parties to that certain Amended and Restated Severance A

May 9, 2022 EX-10.3

Employment Agreement, dated May 2, 2022, by and between Allegro MicroSystems, Inc. and Vineet Nargolwala (incorporated by reference from Exhibit 10.3 to the Company’s Current Report on Form 8-K filed on May 9, 2022)

Exhibit 10.3 EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (the ?Agreement?) entered into as of May 2, 2022, with employment commencing effective as of July 1, 2022 or such other mutually agreed date (the ?Effective Date?) is made by and between Vineet Nargolwala (?Executive?) and Allegro MicroSystems, Inc., a Delaware corporation (together with any of its subsidiaries and affiliates as may emplo

February 10, 2022 SC 13G/A

ALGM / Allegro MicroSystems Inc / OEP SKNA, L.P. - SC 13G/A Passive Investment

United States Securities and Exchange Commission Washington, D.C. 20549 Schedule 13G (Rule 13d-102) Information to be Included in Statements Filed Pursuant to ? 240.13d-1(b), (c) and (d) and Amendments Thereto Filed Pursuant to ? 240.13d-2 UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 1)* Allegro MicroSystems, Inc. (Name of Issuer) Common Stock, par value $0.01 per share (Title of Class

February 10, 2022 SC 13G/A

ALGM / Allegro MicroSystems Inc / Sanken Electric Co., Ltd. - SC 13G/A NO.1 Passive Investment

United States Securities and Exchange Commission Washington, D.C. 20549 Schedule 13G (Rule 13d-102) Information to be Included in Statements Filed Pursuant to ? 240.13d-1(b), (c) and (d) and Amendments Thereto Filed Pursuant to ? 240.13d-2 UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 1)* Allegro MicroSystems, Inc. (Name of Issuer) Common Stock, par value $0.01 per share (Title of Class

February 2, 2022 EX-10.2

Offer Letter, dated January 6, 2022, by and between Allegro MicroSystems, Inc. and Derek D’Antilio (incorporated by reference from Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q filed on February 2, 2022)

Exhibit 10.2 January 6, 2022 Derek D?Antilio Dear Derek, I am very pleased to offer you the position of Senior Vice President, Finance and CFO, reporting to Ravi Vig. We believe your knowledge, experience and enthusiastic spirit will be an excellent addition to our team and are very much looking forward to having you on board. This offer is contingent upon a background check, a negative cross-chec

February 2, 2022 EX-10.4

Offer Letter, dated as of October 15, 2021, by and between Allegro MicroSystems, Inc. and Sharon Briansky (incorporated by reference from Exhibit 10.4 to the Company’s Quarterly Report on Form 10-Q filed on February 2, 2022)

Exhibit 10.4 October 15, 2021 Sharon Briansky Dear Sharon: I am very pleased to offer you the position of Senior Vice President, General Counsel and Corporate Secretary, reporting to Ravi Vig. We believe your knowledge, experience and enthusiastic spirit will be an excellent addition to our team and are very much looking forward to having you on board. This offer is contingent upon a background ch

February 2, 2022 EX-10.6

Consulting Agreement, dated as of January 10, 2022, by and between Allegro MicroSystems, Inc. and Paul V. Walsh, Jr. (incorporated by reference from Exhibit 10.6 to the Company’s Quarterly Report on Form 10-Q filed on February 2, 2022)

Exhibit 10.6 Allegro MicroSystems, Inc. 955 Perimeter Road Manchester, New Hampshire 03103 January 09, 2022 PERSONAL & CONFIDENTIAL BY EMAIL ([email protected]) Paul Walsh 171 Warren Street Needham, MA 02492 RE: Consulting Agreement and General Release Dear Paul: This letter outlines the terms of your separation from employment with Allegro MicroSystems, Inc. (the ?Company?), as of February

February 2, 2022 EX-10.3

Severance Agreement, dated as of January 10, 2022, by and between Allegro MicroSystems, Inc. and Derek D’Antilio (incorporated by reference from Exhibit 10.3 to the Company’s Quarterly Report on Form 10-Q filed on February 2, 2022)

Exhibit 10.3 SEVERANCE AGREEMENT THIS AGREEMENT (the "Agreement") is entered into as of January 10, 2022, between Allegro MicroSystems, LLC., a Delaware limited liability company ("Allegro") and Derek D?Antilio, Senior Vice President, Finance, CFO and Treasurer of Allegro ("Executive"). WHEREAS, Allegro wishes to ensure that Allegro executives will continue to exert maximum effort toward the succe

February 2, 2022 EX-10.5

Severance Agreement, dated as of dated as of December 6, 2021, by and between Allegro MicroSystems, Inc. and Sharon S. Briansky (incorporated by reference from Exhibit 10.5 to the Company’s Quarterly Report on Form 10-Q filed on February 2, 2022)

Exhibit 10.5 SEVERANCE AGREEMENT THIS AGREEMENT (the "Agreement") is entered into as of December 6, 2021, between Allegro MicroSystems, LLC., a Delaware limited liability company ("Allegro") and Sharon Briansky, Senior Vice President, General Counsel and Corporate Secretary of Allegro ("Executive"). WHEREAS, Allegro wishes to ensure that Allegro executives will continue to exert maximum effort tow

February 2, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 December 24, 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: 001-39675 ALLEGRO MICROSYSTEMS, INC.

February 2, 2022 EX-10.1

Loan Agreement, dated as of December 2, 2021, by and between Allegro MicroSystems, Inc. and Polar Semiconductor, LLC (incorporated by reference from Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q filed on February 2, 2022)

Exhibit 10.1 LOAN AGREEMENT THIS LOAN AGREEMENT is made as of December 2nd, 2021, between Polar Semiconductor, LLC., a Delaware corporation headquartered at 2800 East Old Shakopee Road, Bloomington, Minnesota 55425 (?POLAR?), and Allegro Micro Systems, LLC (?Allegro?), a Delaware limited liability company, headquartered at 955 Perimeter Road, Manchester, New Hampshire 03103. WHEREAS, POLAR desires

February 1, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 1, 2022 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-39675 46-2405937 (State or other jurisdiction of incorporation or organ

February 1, 2022 EX-99.1

Allegro MicroSystems Reports Third Quarter of Fiscal Year 2022 Results --Results Exceed Guidance as Momentum Accelerates in Strategic Growth Areas--

Exhibit 99.1 Allegro MicroSystems Reports Third Quarter of Fiscal Year 2022 Results -Results Exceed Guidance as Momentum Accelerates in Strategic Growth Areas- Manchester, NH, February 1, 2022 ? Allegro MicroSystems, Inc. (?Allegro? or the ?Company?) (Nasdaq:ALGM), a global leader in power and sensing semiconductor solutions for motion control and energy efficient systems, today announced financia

January 10, 2022 EX-99.1

Allegro MicroSystems Appoints Derek D’Antilio as Chief Financial Officer --Company thanks retiring CFO Paul Walsh for 7 years of service --

Exhibit 99.1 FOR IMMEDIATE RELEASE January 10, 2022 Contact: Katherine Blye Senior Director, Investor Relations & Marcom Phone: +1 603 626-2306 [email protected] Allegro MicroSystems Appoints Derek D?Antilio as Chief Financial Officer -Company thanks retiring CFO Paul Walsh for 7 years of service - Manchester, NH ? Allegro MicroSystems, Inc. (Nasdaq: ALGM) (?Allegro?), a global leader in sens

January 10, 2022 8-K

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 7, 2022 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-39675 46-2405937 (State or other jurisdiction of incorporation or organi

November 10, 2021 EX-99.1

Allegro MicroSystems Announces Changes to its Board of Directors --Election of Susan Lynch to Replace Christine King--

Exhibit 99.1 FOR IMMEDIATE RELEASE November 10, 2021 Contact: Katherine Blye Senior Director, Investor Relations & Marcom Phone: +1 603 626-2306 [email protected] Allegro MicroSystems Announces Changes to its Board of Directors -Election of Susan Lynch to Replace Christine King- Manchester, NH ? Allegro MicroSystems, Inc. (?Allegro?), a global leader in sensing and power semiconductor technol

November 10, 2021 8-K

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 8, 2021 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-39675 46-2405937 (State or other jurisdiction of incorporation or organ

November 3, 2021 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission File Number: 001-39675 Date of Report (Date of earliest event reported): November 1, 2021 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 46-2405937 (State or other jurisdiction o

November 3, 2021 EX-1.1

Underwriting Agreement, dated as of November 1, 2021, by and among the Company, the Underwriter and the Selling Stockholder

Exhibit 1.1 Execution Version 7,500,000 Shares of Common Stock ALLEGRO MICROSYSTEMS, INC. UNDERWRITING AGREEMENT November 1, 2021 BARCLAYS CAPITAL INC. 745 Seventh Avenue New York, New York 10019 As Representatives of the several Underwriters named in Schedule I attached hereto, Ladies and Gentlemen: The stockholder named in Schedule II attached hereto (the ?Selling Stockholder?) of Allegro MicroS

November 2, 2021 424B7

CALCULATION OF REGISTRATION FEE

Filed Pursuant to Rule 424(b)(7) Registration No. 333-260647 CALCULATION OF REGISTRATION FEE Title of each class of securities to be registered Amount to be registered(1) Maximum offering price per share(2) Maximum aggregate offering price(2) Amount of registration fee(3) Common stock, par value $0.01 per share 8,625,000 shares $30.71 $ 264,873,750 $24,553.80 (1) Includes 1,125,000 shares of commo

November 1, 2021 FWP

Allegro MicroSystems, Inc. Announces Secondary Offering of Common Stock

Issuer Free Writing Prospectus Filed Pursuant to Rule 433 Registration Statement No.

November 1, 2021 S-3ASR

As filed with the Securities and Exchange Commission on November 1, 2021

As filed with the Securities and Exchange Commission on November 1, 2021 Registration No.

November 1, 2021 EX-4.3

Form of Indenture (incorporated by reference from Exhibit 4.3 to the Company’s Registration Statement on Form S-3ASR filed on November 1, 2021)

Exhibit 4.3 ALLEGRO MICROSYSTEMS, INC. INDENTURE Dated as of, 20 [] Trustee US-DOCS\127109820.2 TABLE OF CONTENTS TABLE OF CONTENTS Page ARTICLE I. DEFINITIONS AND INCORPORATION BY REFERENCE.............................................................................................................................. 1 Section 1.1. Definitions.........................................................

October 29, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 24, 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: 001-39675 ALLEGRO MICROSYSTEMS, INC.

October 28, 2021 EX-99.1

Allegro MicroSystems Reports Second Quarter of Fiscal Year 2022 Results --Company Achieves Record Quarterly Revenue and Profitability--

Exhibit 99.1 Allegro MicroSystems Reports Second Quarter of Fiscal Year 2022 Results -Company Achieves Record Quarterly Revenue and Profitability- Manchester, NH, October 28, 2021 ? Allegro MicroSystems, Inc. (?Allegro? or the ?Company?) (Nasdaq:ALGM), a global leader in power and sensing semiconductor solutions for motion control and energy efficient systems, today announced financial results for

October 28, 2021 EX-99.1

CORRECTION - Allegro MicroSystems Reports Second Quarter of Fiscal Year 2022 Results --Company Achieves Record Quarterly Revenue and Profitability--

Exhibit 99.1 CORRECTION - Allegro MicroSystems Reports Second Quarter of Fiscal Year 2022 Results -Company Achieves Record Quarterly Revenue and Profitability- Manchester, NH, October 28, 2021 ? In a release issued under the same headline earlier today by Allegro MicroSystems, Inc. (Nasdaq:ALGM), please note that the line item for Unrealized gains on marketable securities was not displayed in the

October 28, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission File Number: 001-39675 Date of Report (Date of earliest event reported): October 28, 2021 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 46-2405937 (State or other jurisdiction o

October 28, 2021 8-K/A

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission File Number: 001-39675 Date of Report (Date of earliest event reported): October 28, 2021 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 46-2405937 (State or other jurisdiction

August 9, 2021 8-K

Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission File Number: 001-39675 Date of Report (Date of earliest event reported): August 5, 2021 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 46-2405937 (State or other jurisdiction of

July 30, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 25, 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: 001-39675 ALLEGRO MICROSYSTEMS, INC.

July 29, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission File Number: 001-39675 Date of Report (Date of earliest event reported): July 29, 2021 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 46-2405937 (State or other jurisdiction of i

July 29, 2021 EX-99.1

Allegro MicroSystems Reports First Quarter Results Including Recent Records In Revenue and Profit --ADAS and xEV Demand Acceleration and Design Win Momentum Support Strong Growth and Margin Expansion--

EX-99.1 2 earningsreleaseq1fy22.htm EX-99.1 Exhibit 99.1 Allegro MicroSystems Reports First Quarter Results Including Recent Records In Revenue and Profit -ADAS and xEV Demand Acceleration and Design Win Momentum Support Strong Growth and Margin Expansion- Manchester, NH, July 29, 2021 – Allegro MicroSystems, Inc. (“Allegro” or the “Company”) (Nasdaq:ALGM), a global leader in power and sensing sem

July 21, 2021 8-K/A

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 25, 2021 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-39675 46-2405937 (State or other jurisdiction of incorporation or organiz

July 2, 2021 DEF 14A

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

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

July 1, 2021 DEFA14A

The information specifically incorporated by reference into our Annual Report on Form 10-K for the year ended March 26, 2021 from our Definitive Proxy Statement on Schedule 14A, filed with the SEC on July 2, 2021

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

July 1, 2021 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 30, 2021 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-39675 46-2405937 (State or other jurisdiction of incorporation or organiza

July 1, 2021 EX-10.1

Addendum to Stockholders Agreement of Allegro MicroSystems, Inc., dated as of June 30, 2021, by and among Allegro MicroSystems, Inc., OEP SKNA, L.P. and Sanken Electric Co., Ltd. (incorporated by reference from Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on July 1, 2021)

Exhibit 10.1 ADDENDUM TO STOCKHOLDERS AGREEMENT OF ALLEGRO MICROSYSTEMS, INC. THIS ADDENDUM TO STOCKHOLDERS AGREEMENT OF ALLEGRO MICROSYSTEMS, INC. (this ?Addendum?), dated as of June 30, 2021, is entered into by and among Allegro MicroSystems, Inc., a Delaware corporation (the ?Corporation?), OEP SKNA, L.P., a Cayman Islands exempted limited partnership (?OEP?), and Sanken Electric Co., Ltd., a J

May 27, 2021 8-K

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 25, 2021 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-39675 46-2405937 (State or other jurisdiction of incorporation or organizat

May 19, 2021 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 March 26, 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: 001-39675 ALLEGRO MICROSYSTEMS, INC.

May 19, 2021 EX-4.4

Description of securities (incorporated by reference from Exhibit 4.4 to the Company’s Annual Report on Form 10-K on May 19, 2021)

Exhibit 4.4 Description of the Company?s Securities Registered Under Section 12 of the Exchange Act of 1934 Description of Common Stock and Preferred Stock Allegro MicroSystems, Inc., a Delaware corporation (the ?Company,? ?we? or ?our?), currently has one class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the ?Exchange Act?), the Company?s common s

May 19, 2021 EX-10.33

Form of Performance Stock Unit Agreement under Allegro MicroSystems, Inc. 2020 Omnibus Incentive Compensation Plan (incorporated by reference from Exhibit 10.33 to the Company’s Annual Report on Form 10-K filed on May 19, 2021)

Exhibit 10.33 ALLEGRO MICROSYSTEMS, INC. 2020 OMNIBUS INCENTIVE COMPENSATION PLAN PERFORMANCE STOCK UNIT AGREEMENT This PERFORMANCE STOCK UNIT AGREEMENT (the ?Agreement?), dated as [ ] (the ?Date of Grant?), is delivered by Allegro MicroSystems, Inc. (the ?Company?) to [ ] (the ?Participant?). RECITALS The Allegro MicroSystems, Inc. 2020 Omnibus Incentive Compensation Plan (the ?Plan?) provides fo

May 19, 2021 EX-21.1

Subsidiaries of Allegro MicroSystems, Inc.

Exhibit 21.1 Subsidiaries of Allegro MicroSystems, Inc. Name State of Other Jurisdiction of Incorporation or Organization Allegro MicroSystems, LLC Delaware Allegro MicroSystems Argentina, S.A. Argentina Allegro MicroSystems Argentina S.A. Sucursal Uruguay Uruguay Allegro MicroSystems Business Development, Inc. Japan Allegro MicroSystems Europe Limited United Kingdom Allegro MicroSystems France SA

May 19, 2021 EX-10.31

Form of Restricted Stock Unit Agreement under Allegro MicroSystems, Inc. 2020 Omnibus Incentive Compensation Plan (Employees) (incorporated by reference from Exhibit 10.31 to the Company’s Annual Report on Form 10-K filed on May 19, 2021)

Exhibit 10.31 ALLEGRO MICROSYSTEMS, INC. 2020 OMNIBUS INCENTIVE COMPENSATION PLAN RESTRICTED STOCK UNIT AGREEMENT This RESTRICTED STOCK UNIT AGREEMENT (the ?Agreement?), dated as of [?] (the ?Date of Grant?), is delivered by Allegro MicroSystems, Inc. (the ?Company?) to [?] (the ?Participant?). RECITALS The Allegro MicroSystems, Inc. 2020 Omnibus Incentive Compensation Plan (the ?Plan?) provides f

May 10, 2021 8-K

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission File Number: 001-39675 Date of Report (Date of earliest event reported): May 5, 2021 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 46-2405937 (State or other jurisdiction of inc

May 5, 2021 EX-99.1

Allegro MicroSystems Reports Fourth Quarter Record Revenue and Accelerating Profits --Market Share Gain and End Market Recovery Driving Confidence in Long-term Outlook--

Exhibit 99.1 Allegro MicroSystems Reports Fourth Quarter Record Revenue and Accelerating Profits -Market Share Gain and End Market Recovery Driving Confidence in Long-term Outlook- Manchester, NH, May 5, 2021 ? Allegro MicroSystems, Inc. (?Allegro? or the ?Company?) (Nasdaq:ALGM), a global leader in power and sensing semiconductor solutions for motion control and energy efficient systems, today an

May 5, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission File Number: 001-39675 Date of Report (Date of earliest event reported): May 5, 2021 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 46-2405937 (State or other jurisdiction of inc

April 9, 2021 8-K

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): April 9, 2021 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-39675 46-2405937 (State or other jurisdiction of incorporation) (Commissio

March 9, 2021 8-K

Financial Statements and Exhibits, Material Impairments

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 Commission File Number: 001-39675 Date of Report (Date of earliest event reported): March 3, 2021 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 46-2405937 (State or other jurisdiction of i

February 8, 2021 424B4

17,500,000 Shares Allegro MicroSystems, Inc. Common Stock

424B4 Table of Contents Filed Pursuant to Rule 424(b)(4) Registration No. 333-252667 17,500,000 Shares Allegro MicroSystems, Inc. Common Stock The selling stockholders identified in this prospectus are offering 17,500,000 shares of our common stock. We are not selling any shares of our common stock in this offering and will not receive any of the proceeds from the sale of shares by the selling sto

February 8, 2021 SC 13G

United States Securities and Exchange Commission Washington, D.C. 20549 Schedule 13G (Rule 13d-102) Information to be Included in Statements Filed Pursuant to § 240.13d-1(b), (c) and (d) and Amendments Thereto Filed Pursuant to § 240.13d-2 UNDER THE

SC 13G United States Securities and Exchange Commission Washington, D.C. 20549 Schedule 13G (Rule 13d-102) Information to be Included in Statements Filed Pursuant to § 240.13d-1(b), (c) and (d) and Amendments Thereto Filed Pursuant to § 240.13d-2 UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. )* Allegro MicroSystems, Inc. (Name of Issuer) Common Stock, par value $0.01 per share (Title of

February 8, 2021 EX-99

Joint Filing

EX-99 2 d329816dex99.htm EX-99 Exhibit 99 JOINT FILING AGREEMENT In accordance with Rule 13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree that they are jointly filing this statement on Schedule 13G. Each of them is responsible for the timely filing of such statement and any amendments thereto, and for the completeness and accuracy of the i

February 8, 2021 SC 13G

United States Securities and Exchange Commission Washington, D.C. 20549 Schedule 13G (Rule 13d-102) Information to be Included in Statements Filed Pursuant to § 240.13d-1(b), (c) and (d) and Amendments Thereto Filed Pursuant to § 240.13d-2 UNDER THE

SC 13G United States Securities and Exchange Commission Washington, D.C. 20549 Schedule 13G (Rule 13d-102) Information to be Included in Statements Filed Pursuant to § 240.13d-1(b), (c) and (d) and Amendments Thereto Filed Pursuant to § 240.13d-2 UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. )* Allegro MicroSystems, Inc. (Name of Issuer) Common Stock, par value $0.01 per share (Title of

February 4, 2021 S-1MEF

- S-1MEF

S-1MEF As filed with the Securities and Exchange Commission on February 4, 2021 Registration No.

February 2, 2021 EX-99.1

--End Market Recovery Driving Strong Outlook--

Exhibit 99.1 Allegro MicroSystems Announces Results for the Third Fiscal Quarter Ended December 25, 2020 -End Market Recovery Driving Strong Outlook- Manchester, NH, February 2, 2021 – Allegro MicroSystems, Inc. (“Allegro” or the “Company”) (Nasdaq:ALGM), a global leader in power and sensing semiconductor solutions for motion control and energy efficient systems, today announced financial results

February 2, 2021 EX-21.1

Subsidiaries of Allegro MicroSystems, Inc.

EX-21.1 5 d112873dex211.htm EX-21.1 Exhibit 21.1 Subsidiaries of Allegro MicroSystems, Inc. Name State of Other Jurisdiction of Incorporation or Organization Allegro MicroSystems, LLC Delaware Allegro MicroSystems Argentina, S.A. Argentina Allegro MicroSystems Argentina S.A. Sucursal Uruguay Uruguay Allegro MicroSystems Business Development, Inc. Japan Allegro MicroSystems Europe Limited United Ki

February 2, 2021 CORRESP

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February 2, 2021 VIA EDGAR United States Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.

February 2, 2021 S-1

Registration Statement

S-1 Table of Contents As filed with the Securities and Exchange Commission on February 2, 2021 Registration No.

February 2, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission File Number: 001-39675 Date of Report (Date of earliest event reported): February 2, 2021 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 46-2405937 (State or other jurisdiction o

February 2, 2021 CORRESP

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February 2, 2021 Via EDGAR Transmission United States Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.

February 2, 2021 EX-1.1

Form of Underwriting Agreement

EX-1.1 Exhibit 1.1 15,000,000 shares of Common Stock ALLEGRO MICROSYSTEMS, INC. UNDERWRITING AGREEMENT , 2021 BARCLAYS CAPITAL INC. CREDIT SUISSE SECURITIES (USA) LLC WELLS FARGO SECURITIES, LLC As Representatives of the several Underwriters named in Schedule I attached hereto, c/o Barclays Capital Inc. 745 Seventh Avenue New York, New York 10019 Credit Suisse Securities (USA) LLC Eleven Madison A

February 2, 2021 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 December 25, 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: 001-39675 ALLEGRO MICROSYSTEMS, INC.

February 2, 2021 EX-16.1

Letter of Ernst & Young LLP regarding changes in the independent registered public accounting firm of Allegro MicroSystems, Inc.

EX-16.1 Exhibit 16.1 February 1, 2021 Securities and Exchange Commission 100 F Street, N.E. Washington, DC 20549 Ladies and Gentlemen: We have read the discussion under the caption “Change in Accountants” included in the registration statement on Form S-1 of Allegro MicroSystems, Inc. and are in agreement with the statements contained in the second and third paragraphs therein. We have no basis to

January 25, 2021 DRS

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DRS Table of Contents CONFIDENTIAL TREATMENT REQUESTED PURSUANT TO 17 C.F.R. SECTION 200.83 As confidentially submitted to the Securities and Exchange Commission on January 25, 2021 Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ALLEGRO MICROSYSTEMS, INC. (Exact name of registrant as spe

November 20, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 25, 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: 001-39675 ALLEGRO MICROSYSTEMS, INC.

November 19, 2020 EX-99.1

September 25, 2020 --Strong Growth and Solid Operating Results--

Exhibit 99.1 Allegro MicroSystems Announces Results for the Second Fiscal Quarter Ended September 25, 2020 -Strong Growth and Solid Operating Results- Manchester, NH, November 19, 2020 – Allegro MicroSystems, Inc. (“Allegro” or the “Company”) (Nasdaq:ALGM), a global leader in power and sensing semiconductor solutions for motion control and energy efficient systems, today announced financial result

November 19, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 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 Commission File Number: 001-39675 Date of Report (Date of earliest event reported): November 19, 2020 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 46-2405937 (State or other jurisdiction

November 19, 2020 8-K/A

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission File Number: 001-39675 Date of Report (Date of earliest event reported): November 19, 2020 ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified in its Charter) Delaware 46-2405937 (State or other jurisdictio

November 19, 2020 EX-99.1

--Strong Growth and Solid Operating Results--

Exhibit 99.1 CORRECTION - Allegro MicroSystems Announces Results for the Second Fiscal Quarter Ended September 25, 2020 -Strong Growth and Solid Operating Results- Manchester, NH, November 19, 2020 ? In a release issued under the same headline earlier today by Allegro MicroSystems, Inc. (Nasdaq:ALGM), please note that the balance sheet line items for Total current liabilities, Related party notes

November 2, 2020 EX-3.1

Third Amended and Restated Certificate of Incorporation of Allegro MicroSystems, Inc. (incorporated by reference from Exhibit 3.1 to the Company’s Current Report on Form 8-K filed on November 2, 2020)

EX-3.1 Exhibit 3.1 THIRD AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF ALLEGRO MICROSYSTEMS, INC. Allegro MicroSystems, Inc. (the “Corporation”), a corporation organized and existing under the General Corporation Law of the State of Delaware (the “DGCL”), does hereby certify as follows: 1. The name of the Corporation is Allegro MicroSystems, Inc. The Corporation was incorporated under the n

November 2, 2020 EX-10.1

Amended and Restated Registration Rights Agreement, by and among the Company, Sanken Electric Co. and OEP SKNA, L.P. (incorporated by reference from Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on November 2, 2020)

EX-10.1 Exhibit 10.1 AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT This AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT (this “Agreement”), dated as of November 2, 2020, is by and among Allegro MicroSystems, Inc., a Delaware corporation (the “Corporation”), Sanken Electric Co., Ltd, a Japanese corporation (“Sanken”) and OEP SKNA, L.P., a Cayman Islands exempted limited partnership (“OEP” a

November 2, 2020 EX-3.2

Amended and Restated Bylaws of Allegro MicroSystems, Inc.

EX-3.2 Exhibit 3.2 Amended and Restated Bylaws of ALLEGRO MICROSYSTEMS, INC. (a Delaware corporation) Table of Contents Page Article I - Corporate Offices 1 1.1 Registered Office 1 1.2 Other Offices 1 Article II - Meetings of Stockholders 1 2.1 Place of Meetings 1 2.2 Annual Meeting 1 2.3 Special Meeting 1 2.4 Advance Notice Procedures for Business Brought before a Meeting 2 2.5 Advance Notice Pro

November 2, 2020 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Entry into a Material Definitive Agreement, Financial Statements and Exhibits - 8-K

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): November 2, 2020 ALLEGRO MICROSYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware 001-39675 46-2405937 (State or other jurisdiction of incorporation or o

October 30, 2020 EX-99.4

Form of Performance Stock Unit Agreement under Allegro MicroSystems, Inc. 2020 Omnibus Incentive Compensation Plan (incorporated by reference to Exhibit 99.4 to our Registration Statement on Form S-8 (File No. 333-249771) filed with the SEC on October 30, 2020)

EX-99.4 Exhibit 99.4 ALLEGRO MICROSYSTEMS, INC. 2020 OMNIBUS INCENTIVE COMPENSATION PLAN PERFORMANCE STOCK UNIT AGREEMENT This PERFORMANCE STOCK UNIT AGREEMENT (the “Agreement”), dated as [ ] (the “Date of Grant”), is delivered by Allegro MicroSystems, Inc. (the “Company”) to [ ] (the “Participant”). RECITALS The Allegro MicroSystems, Inc. 2020 Omnibus Incentive Compensation Plan (the “Plan”) prov

October 30, 2020 EX-99.1

Form of Allegro MicroSystems, Inc. 2020 Omnibus Incentive Compensation Plan (incorporated by reference from Exhibit 99.1 to the Company’s Registration Statement on Form S-8 filed on October 30, 2020)

EX-99.1 Exhibit 99.1 ALLEGRO MICROSYSTEMS, INC. 2020 OMNIBUS INCENTIVE COMPENSATION PLAN Effective as of the Effective Date (as defined below), the Allegro MicroSystems, Inc. 2020 Omnibus Incentive Compensation Plan (the “Plan”) is hereby established. The purpose of the Plan is to provide employees of Allegro MicroSystems, Inc. (the “Company”) and its subsidiaries, certain consultants and advisors

October 30, 2020 424B4

25,000,000 Shares Allegro MicroSystems, Inc. Common Stock

424B4 Table of Contents Filed Pursuant to Rule 424(b)(4) Registration No. 333-249348 25,000,000 Shares Allegro MicroSystems, Inc. Common Stock This is an initial public offering of shares of common stock of Allegro MicroSystems, Inc. We are offering 25,000,000 shares of our common stock. Prior to this offering, there has been no public market for our common stock. The initial public offering price

October 30, 2020 S-8

- FORM S-8

Form S-8 As filed with the Securities and Exchange Commission on October 30, 2020 Registration No.

October 30, 2020 EX-99.2

Form of Restricted Stock Unit Agreement under Allegro MicroSystems, Inc. 2020 Omnibus Incentive Compensation Plan (Employees) (incorporated by reference to Exhibit 99.2 to our Registration Statement on Form S-8 (File No. 333-249771) filed with the SEC on October 30, 2020)

EX-99.2 5 d35634dex992.htm EX-99.2 Exhibit 99.2 ALLEGRO MICROSYSTEMS, INC. 2020 OMNIBUS INCENTIVE COMPENSATION PLAN RESTRICTED STOCK UNIT AGREEMENT This RESTRICTED STOCK UNIT AGREEMENT (the “Agreement”), dated as of [●] (the “Date of Grant”), is delivered by Allegro MicroSystems, Inc. (the “Company”) to [●] (the “Participant”). RECITALS The Allegro MicroSystems, Inc. 2020 Omnibus Incentive Compens

October 30, 2020 EX-99.5

Form of Allegro MicroSystems, Inc. 2020 Employee Stock Purchase Plan (incorporated by reference from Exhibit 99.5 to the Company’s Registration Statement on Form S-8 filed on October 30, 2020)

EX-99.5 Exhibit 99.5 ALLEGRO MICROSYSTEMS, INC. 2020 EMPLOYEE STOCK PURCHASE PLAN ARTICLE I. PURPOSE The purpose of this Plan is to assist Eligible Employees of the Company and its Designated Subsidiaries in acquiring a stock ownership interest in the Company. The Plan consists of two components: (i) the Section 423 Component and (ii) the Non-Section 423 Component. The Section 423 Component is int

October 29, 2020 8-A12B

The description of our common stock contained in our Registration Statement on Form 8-A (File No. 001-39675), filed with the SEC on October 29, 2020, and any amendment or report filed with the SEC for the purpose of updating the description

8-A12B UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 Allegro MicroSystems, Inc. (Exact name of registrant as specified in its charter) Delaware 46-2405937 (State of incorporation or organization) (I.R.S. Employer Identification No.) 955 Perime

October 26, 2020 CORRESP

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CORRESP October 26, 2020 Via EDGAR Transmission United States Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.

October 26, 2020 CORRESP

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CORRESP October 26, 2020 VIA EDGAR United States Securities and Exchange Commission Division of Manufacturing 100 F Street, NE, Mail Stop 3010 Washington, DC 20549 Attention: Erin Purnell Re: Allegro MicroSystems, Inc.

October 21, 2020 EX-21.1

Subsidiaries of Allegro MicroSystems, Inc.

EX-21.1 Exhibit 21.1 Subsidiaries of Allegro MicroSystems, Inc. Name State of Other Jurisdiction of Incorporation or Organization Allegro MicroSystems, LLC Delaware Allegro MicroSystems Argentina, S.A. Argentina Allegro MicroSystems Argentina S.A. Sucursal Uruguay Uruguay Allegro MicroSystems Business Development, Inc. Japan Allegro MicroSystems Europe Limited United Kingdom Allegro MicroSystems F

October 21, 2020 EX-10.34

Form of Restricted Stock Unit Agreement under Allegro MicroSystems, Inc. 2020 Omnibus Incentive Compensation Plan (Board of Directors) (incorporated by reference from Exhibit 10.34 to the Company’s Registration Statement on Form S-1/A filed on October 21, 2020)

EX-10.34 Exhibit 10.34 Non-Employee Director Form ALLEGRO MICROSYSTEMS, INC. 2020 OMNIBUS INCENTIVE COMPENSATION PLAN RESTRICTED STOCK UNIT AGREEMENT This RESTRICTED STOCK UNIT AGREEMENT (the “Agreement”), dated as of [●] (the “Date of Grant”), is delivered by Allegro MicroSystems, Inc. (the “Company”) to [●] (the “Participant”). RECITALS The Allegro MicroSystems, Inc. 2020 Omnibus Incentive Compe

October 21, 2020 EX-10.35

Form of Performance Stock Unit Agreement under Allegro MicroSystems, Inc. 2020 Omnibus Incentive Compensation Plan.

EX-10.35 Exhibit 10.35 ALLEGRO MICROSYSTEMS, INC. 2020 OMNIBUS INCENTIVE COMPENSATION PLAN PERFORMANCE STOCK UNIT AGREEMENT This PERFORMANCE STOCK UNIT AGREEMENT (the “Agreement”), dated as [ ] (the “Date of Grant”), is delivered by Allegro MicroSystems, Inc. (the “Company”) to [ ] (the “Participant”). RECITALS The Allegro MicroSystems, Inc. 2020 Omnibus Incentive Compensation Plan (the “Plan”) pr

October 21, 2020 EX-10.32

Form of Allegro MicroSystems, Inc. 2020 Omnibus Incentive Compensation Plan

EX-10.32 Exhibit 10.32 ALLEGRO MICROSYSTEMS, INC. 2020 OMNIBUS INCENTIVE COMPENSATION PLAN Effective as of the Effective Date (as defined below), the Allegro MicroSystems, Inc. 2020 Omnibus Incentive Compensation Plan (the “Plan”) is hereby established. The purpose of the Plan is to provide employees of Allegro MicroSystems, Inc. (the “Company”) and its subsidiaries, certain consultants and adviso

October 21, 2020 EX-3.4

Amended and Restated Bylaws of the Registrant, to be in effect upon the closing of the initial public offering of the Registrant’s Common Stock (incorporated by reference to Exhibit 3.4 to Amendment No. 2 to the Registrant’s Registration Statement on Form S-1 (File No. 333-249348) filed on October 21, 2020).

EX-3.4 Exhibit 3.4 Amended and Restated Bylaws of ALLEGRO MICROSYSTEMS, INC. (a Delaware corporation) Table of Contents Page Article I - Corporate Offices 1 1.1 Registered Office 1 1.2 Other Offices 1 Article II - Meetings of Stockholders 1 2.1 Place of Meetings 1 2.2 Annual Meeting 1 2.3 Special Meeting 1 2.4 Advance Notice Procedures for Business Brought before a Meeting 2 2.5 Advance Notice Pro

October 21, 2020 S-1/A

Form S-1

Amendment No. 2 to Form S-1 Table of Contents As filed with the Securities and Exchange Commission on October 21, 2020 Registration No. 333-249348 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Amendment No. 2 to FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ALLEGRO MICROSYSTEMS, INC. (Exact name of registrant as specified in its charter) Delaware 3674 4

October 21, 2020 EX-10.33

Form of Restricted Stock Unit Agreement under Allegro MicroSystems, Inc. 2020 Omnibus Incentive Compensation Plan (Employees).

EX-10.33 Exhibit 10.33 ALLEGRO MICROSYSTEMS, INC. 2020 OMNIBUS INCENTIVE COMPENSATION PLAN RESTRICTED STOCK UNIT AGREEMENT This RESTRICTED STOCK UNIT AGREEMENT (the “Agreement”), dated as of [●] (the “Date of Grant”), is delivered by Allegro MicroSystems, Inc. (the “Company”) to [●] (the “Participant”). RECITALS The Allegro MicroSystems, Inc. 2020 Omnibus Incentive Compensation Plan (the “Plan”) p

October 21, 2020 EX-4.3

Form of Amended and Restated Registration Rights Agreement, by and among the Company, Sanken Electric Co. and OEP SKNA, L.P.

EX-4.3 Exhibit 4.3 AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT This AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT (this “Agreement”), dated as of [ 🌑 ], 2020, is by and among Allegro MicroSystems, Inc., a Delaware corporation (the “Corporation”), Sanken Electric Co., Ltd, a Japanese corporation (“Sanken”) and OEP SKNA, L.P., a Cayman Islands exempted limited partnership (“OEP” and, to

October 21, 2020 EX-3.2

Form of Amended and Restated Certificate of Incorporation of Allegro MicroSystems, Inc., to be in effect upon the closing of this offering.

EX-3.2 Exhibit 3.2 THIRD AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF ALLEGRO MICROSYSTEMS, INC. Allegro MicroSystems, Inc. (the “Corporation”), a corporation organized and existing under the General Corporation Law of the State of Delaware (the “DGCL”), does hereby certify as follows: 1. The name of the Corporation is Allegro MicroSystems, Inc. The Corporation was incorporated under the n

October 21, 2020 EX-10.36

Form of Allegro MicroSystems, Inc. 2020 Employee Stock Purchase Plan.

EX-10.36 Exhibit 10.36 ALLEGRO MICROSYSTEMS, INC. 2020 EMPLOYEE STOCK PURCHASE PLAN ARTICLE I. PURPOSE The purpose of this Plan is to assist Eligible Employees of the Company and its Designated Subsidiaries in acquiring a stock ownership interest in the Company. The Plan consists of two components: (i) the Section 423 Component and (ii) the Non-Section 423 Component. The Section 423 Component is i

October 21, 2020 EX-1.1

Form of Underwriting Agreement.

EX-1.1 Exhibit 1.1 [ • ] shares of Common Stock ALLEGRO MICROSYSTEMS, INC. UNDERWRITING AGREEMENT [ • ], 2020 BARCLAYS CAPITAL INC. CREDIT SUISSE SECURITIES (USA) LLC WELLS FARGO SECURITIES, LLC As Representatives of the several Underwriters named in Schedule I attached hereto, c/o Barclays Capital Inc. 745 Seventh Avenue New York, New York 10019 Credit Suisse Securities (USA) LLC Eleven Madison A

October 21, 2020 EX-4.1

(incorporated by reference from Exhibit 4.1 to the Company’s Registration Statement on Form S-1/A filed on October 21, 2020)

EX-4.1 Exhibit 4.1 ZQ|CERT#|COY|CLS|RGSTRY|ACCT#|TRANSTYPE|RUN#|TRANS# COMMON STOCK COMMON STOCK PO PAR VALUE $0.01 MR ADD ADD ADD ADD 4 3 2 1 A BOX DESIGNATION SAMPLE Certificate Shares 505006, Number * * 000000 ****************** (IF * * * 000000 ***************** ANY) ZQ00000000 **** 000000 **************** Louisville, ALLEGRO MICROSYSTEMS, INC. ***** 000000 *************** KY ****** 000000 ***

October 21, 2020 EX-10.43

(incorporated by reference from Exhibit 10.43 to the Company’s Registration Statement on Form S-1/A filed on October 21, 2020)

EX-10.43 Exhibit 10.43 ALLEGRO MICROSYSTEMS, INC. INDEMNIFICATION AGREEMENT THIS INDEMNIFICATION AGREEMENT (the “Agreement”) is made and entered into as of , 2020 between Allegro MicroSystems, Inc., a Delaware corporation (the “Company”), and [Name] (“Indemnitee”). WITNESSETH THAT: WHEREAS, highly competent persons have become more reluctant to serve corporations as directors, officers or in other

October 21, 2020 EX-10.42

Form of Allegro MicroSystems, Inc. Non-Employee Director Compensation Program (incorporated by reference to Exhibit 10.42 to our Registration Statement on Form S-1/A (File No. 333-249348) filed with the SEC on October 21, 2020)

EX-10.42 Exhibit 10.42 ALLEGRO MICROSYSTEMS, INC. NON-EMPLOYEE DIRECTOR COMPENSATION PROGRAM Eligible Directors (as defined below) on the board of directors (the “Board”) of Allegro MicroSystems, Inc. (the “Company”) shall be eligible to receive cash and equity compensation as set forth in this Non-Employee Director Compensation Program (this “Program”). The cash and equity compensation described

October 13, 2020 EX-10.31

Allegro MicroSystems, Inc. Long Term Incentive Plan (FY 2018).

EX-10.31 Exhibit 10.31 ALLEGRO MICROSYSTEMS, INC. LONG-TERM CASH INCENTIVE PLAN As Amended and Restated Effective as of March 31, 2018 1. PURPOSE The establishment of this Long-Term Cash Incentive Plan was authorized by the Board of Directors of Allegro MicroSystems, Inc. (“AMI”), formerly known as Sanken North America, Inc., on August 28, 2015. The Plan is hereby amended and restated as follows,

October 13, 2020 EX-10.5

Wafer Foundry Agreement, dated as of April 12, 2013, by and between Allegro MicroSystems, LLC and Polar Semiconductor, LLC (incorporated by reference from Exhibit 10.5 to the Company’s Registration Statement on Form S-1/A filed on October 13, 2020)

EX-10.5 Exhibit 10.5 [XXX] Certain information in this document has been excluded pursuant to Regulation S-K, Item 601(b)(10). Such excluded information is not material and would likely cause competitive harm to the registrant if publicly disclosed. WAFER FOUNDRY AGREEMENT This Wafer Foundry Agreement (“Agreement”) is made and entered into this 12th day of April 2013, (the “Effective Date”) by and

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