Cover Page
Cover Page - USD ($) $ in Billions | 12 Months Ended | ||
Mar. 25, 2022 | May 06, 2022 | Sep. 24, 2021 | |
Cover [Abstract] | |||
Document Type | 10-K/A | ||
Document Annual Report | true | ||
Document Period End Date | Mar. 25, 2022 | ||
Current Fiscal Year End Date | --03-25 | ||
Document Transition Report | false | ||
Entity File Number | 001-39675 | ||
Entity Registrant Name | ALLEGRO MICROSYSTEMS, INC. | ||
Entity Incorporation, State or Country Code | DE | ||
Entity Tax Identification Number | 46-2405937 | ||
Entity Address, Address Line One | 955 Perimeter Road | ||
Entity Address, City or Town | Manchester, | ||
Entity Address, State or Province | NH | ||
Entity Address, Postal Zip Code | 03103 | ||
City Area Code | 603 | ||
Local Phone Number | 626-2300 | ||
Title of 12(b) Security | Common Stock, par value $0.01 per share | ||
Trading Symbol | ALGM | ||
Security Exchange Name | NASDAQ | ||
Entity Well-known Seasoned Issuer | Yes | ||
Entity Voluntary Filers | No | ||
Entity Current Reporting Status | Yes | ||
Entity Interactive Data Current | Yes | ||
Entity Filer Category | Large Accelerated Filer | ||
Entity Small Business | false | ||
Entity Emerging Growth Company | false | ||
ICFR Auditor Attestation Flag | true | ||
Entity Shell Company | false | ||
Entity Public Float | $ 1.9 | ||
Entity Common Stock, Shares Outstanding (in shares) | 190,500,630 | ||
Documents Incorporated by Reference | Portions of the registrant’s proxy statement for its 2022 Annual Meeting of Stockholders filed pursuant to Regulation 14A within 120 days of the end of the registrant’s fiscal year ended March 25, 2022 are incorporated by reference into Part III of this Annual Report on Form 10-K to the extent stated herein. | ||
Entity Central Index Key | 0000866291 | ||
Amendment Flag | false | ||
Document Fiscal Year Focus | 2022 | ||
Document Fiscal Period Focus | FY |
Audit Information
Audit Information | 12 Months Ended |
Mar. 25, 2022 | |
Auditor Information [Abstract] | |
Auditor Name | Grant Thornton LLP |
Auditor Location | Boston, Massachusetts |
Auditor Firm ID | 248 |
Cover
Cover | 12 Months Ended |
Mar. 25, 2022 | |
Cover [Abstract] | |
Documents Incorporated by Reference | Portions of the registrant’s proxy statement for its 2022 Annual Meeting of Stockholders filed pursuant to Regulation 14A within 120 days of the end of the registrant’s fiscal year ended March 25, 2022 are incorporated by reference into Part III of this Annual Report on Form 10-K to the extent stated herein. |