Allegro Microsystems, Inc. SEC filings ALGM
Allegro Microsystems, Inc. has 529 filings in SEC EDGAR's recent list, going back to Aug 8, 2007. Its latest annual report, Form ARS, was filed on Jun 24, 2026 for the period ended Mar 27, 2026. The latest quarterly report (Form 10-Q) was filed on Oct 30, 2026, covering the quarter ended Sep 25, 2026. The most recent current report (Form 8-K) was filed on Oct 29, 2026 (results of operations). The company's fiscal year ends on March 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 10-Q | Quarterly report | Oct 30, 2026 | Sep 25, 2026 |
| 8-K |
Current report
Results of operations
|
Oct 29, 2026 | Oct 29, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 7, 2026 | — |
| 4 | Insider transaction | Oct 1, 2026 | Sep 30, 2026 |
| 4 | Insider transaction | Aug 18, 2026 | Aug 17, 2026 |
| 144 | Notice of proposed sale | Aug 17, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 13, 2026 | — |
| 4 | Insider transaction | Aug 12, 2026 | Aug 10, 2026 |
| 144 | Notice of proposed sale | Aug 10, 2026 | — |
| 8-K |
Current report
Shareholder vote results
|
Aug 7, 2026 | Aug 5, 2026 |
| 4 | Insider transaction | Aug 7, 2026 | Aug 5, 2026 |
| 4 | Insider transaction | Aug 7, 2026 | Aug 5, 2026 |
| 4 | Insider transaction | Aug 7, 2026 | Aug 5, 2026 |
| 4 | Insider transaction | Aug 7, 2026 | Aug 5, 2026 |
| 4 | Insider transaction | Aug 7, 2026 | Aug 5, 2026 |
| 4 | Insider transaction | Aug 7, 2026 | Aug 5, 2026 |
| 4 | Insider transaction | Aug 7, 2026 | Aug 5, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 6, 2026 | — |
| 10-Q | Quarterly report | Jul 31, 2026 | Jun 26, 2026 |
| 8-K |
Current report
Results of operations
|
Jul 30, 2026 | Jul 30, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 27, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jul 16, 2026 | — |
| ARS | Annual report to shareholders | Jun 24, 2026 | Mar 27, 2026 |
| DEFA14A | Additional proxy material | Jun 24, 2026 | — |
| DEF 14A | Proxy statement | Jun 24, 2026 | Aug 5, 2026 |
| 4 | Insider transaction | Jun 18, 2026 | Jun 17, 2026 |
| 3 | Initial insider ownership | Jun 18, 2026 | Jun 17, 2026 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Jun 18, 2026 | Jun 17, 2026 |
| 4 | Insider transaction | Jun 4, 2026 | Jun 3, 2026 |
| 144 | Notice of proposed sale | Jun 3, 2026 | — |
| SD | Specialized disclosure (conflict minerals) | May 29, 2026 | — |
| 4 | Insider transaction | May 26, 2026 | May 22, 2026 |
| 4 | Insider transaction | May 22, 2026 | May 21, 2026 |
| 144 | Notice of proposed sale | May 22, 2026 | — |
| 10-K | Annual report | May 21, 2026 | Mar 27, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 16, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 16, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 16, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 16, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 16, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 16, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 16, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 16, 2026 |
| 144 | Notice of proposed sale | May 18, 2026 | — |
| 4 | Insider transaction | May 15, 2026 | May 13, 2026 |
| 4 | Insider transaction | May 15, 2026 | May 13, 2026 |
| 4 | Insider transaction | May 15, 2026 | May 13, 2026 |
| 4 | Insider transaction | May 15, 2026 | May 13, 2026 |
| 4 | Insider transaction | May 15, 2026 | May 13, 2026 |
| 4 | Insider transaction | May 15, 2026 | May 14, 2026 |
| 4 | Insider transaction | May 15, 2026 | May 13, 2026 |
| 4 | Insider transaction | May 15, 2026 | May 13, 2026 |
| 4 | Insider transaction | May 15, 2026 | May 13, 2026 |
| 4 | Insider transaction | May 15, 2026 | May 13, 2026 |
| 3 | Initial insider ownership | May 15, 2026 | May 13, 2026 |
| 144 | Notice of proposed sale | May 14, 2026 | — |
| 4 | Insider transaction | May 13, 2026 | May 11, 2026 |
| 4 | Insider transaction | May 13, 2026 | May 11, 2026 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
May 13, 2026 | May 11, 2026 |
| 144 | Notice of proposed sale | May 11, 2026 | — |
| 144 | Notice of proposed sale | May 11, 2026 | — |
| 8-K |
Current report
Results of operations
|
May 7, 2026 | May 7, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 6, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 26, 2026 | — |
| 4 | Insider transaction | Mar 25, 2026 | Mar 24, 2026 |
| 4 | Insider transaction | Mar 4, 2026 | Feb 2, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Feb 27, 2026 |
| 144 | Notice of proposed sale | Mar 2, 2026 | — |
| 144 | Notice of proposed sale | Mar 2, 2026 | — |
| 4 | Insider transaction | Feb 18, 2026 | Feb 13, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 13, 2026 |
| 144 | Notice of proposed sale | Feb 17, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 12, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 5, 2026 | — |
| 10-Q | Quarterly report | Jan 30, 2026 | Dec 26, 2025 |
| 8-K |
Current report
Results of operations
|
Jan 29, 2026 | Jan 29, 2026 |
| 8-K |
Current report
Material agreement, New debt
|
Jan 21, 2026 | Jan 21, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Jan 16, 2026 | Jan 15, 2026 |
| 3 | Initial insider ownership | Jan 9, 2026 | Jan 5, 2026 |
| 4 | Insider transaction | Dec 12, 2025 | Dec 10, 2025 |
| 144 | Notice of proposed sale | Dec 10, 2025 | — |
| 4 | Insider transaction | Nov 12, 2025 | Nov 11, 2025 |
| 10-Q | Quarterly report | Oct 31, 2025 | Sep 26, 2025 |
| 8-K |
Current report
Results of operations
|
Oct 30, 2025 | Oct 30, 2025 |
| 3 | Initial insider ownership | Oct 16, 2025 | Oct 13, 2025 |
| 4 | Insider transaction | Aug 25, 2025 | Aug 22, 2025 |
| 4 | Insider transaction | Aug 13, 2025 | Aug 12, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 13, 2025 | — |
| 144 | Notice of proposed sale | Aug 12, 2025 | — |
| 4 | Insider transaction | Aug 8, 2025 | Aug 7, 2025 |
| 4 | Insider transaction | Aug 8, 2025 | Aug 7, 2025 |
| 4 | Insider transaction | Aug 8, 2025 | Aug 7, 2025 |
| 4 | Insider transaction | Aug 8, 2025 | Aug 7, 2025 |
| 4 | Insider transaction | Aug 8, 2025 | Aug 7, 2025 |
| 4 | Insider transaction | Aug 8, 2025 | Aug 7, 2025 |
| 4 | Insider transaction | Aug 8, 2025 | Aug 7, 2025 |
| 8-K |
Current report
Shareholder vote results
|
Aug 8, 2025 | Aug 7, 2025 |
| 4 | Insider transaction | Aug 5, 2025 | Aug 4, 2025 |
| 144 | Notice of proposed sale | Aug 4, 2025 | — |
| 10-Q | Quarterly report | Aug 1, 2025 | Jun 27, 2025 |
| 8-K |
Current report
Results of operations
|
Jul 31, 2025 | Jul 31, 2025 |
| ARS | Annual report to shareholders | Jun 25, 2025 | Mar 28, 2025 |
| DEFA14A | Additional proxy material | Jun 25, 2025 | — |
| DEF 14A | Proxy statement | Jun 25, 2025 | Aug 7, 2025 |
| 4 | Insider transaction | Jun 12, 2025 | Jun 11, 2025 |
| 144 | Notice of proposed sale | Jun 11, 2025 | — |
| 4 | Insider transaction | Jun 6, 2025 | Jun 4, 2025 |
| 144 | Notice of proposed sale | Jun 4, 2025 | — |
| SD | Specialized disclosure (conflict minerals) | May 22, 2025 | — |
| 10-K | Annual report | May 22, 2025 | Mar 28, 2025 |
| 4 | Insider transaction | May 19, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 19, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 19, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 19, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 19, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 19, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 14, 2025 | May 13, 2025 |
| 4 | Insider transaction | May 14, 2025 | May 13, 2025 |
| 4 | Insider transaction | May 14, 2025 | May 13, 2025 |
| 4 | Insider transaction | May 14, 2025 | May 13, 2025 |
| 4 | Insider transaction | May 14, 2025 | May 13, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | May 13, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 12, 2025 | — |
| 8-K |
Current report
Results of operations
|
May 8, 2025 | May 8, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 15, 2025 | — |
| 3 | Initial insider ownership | Mar 31, 2025 | Mar 29, 2025 |
| 8-K |
Current report
Officer or director change
|
Mar 12, 2025 | Mar 12, 2025 |
| 425 | Filing | Mar 6, 2025 | — |
| 4 | Insider transaction | Mar 3, 2025 | Feb 27, 2025 |
| 4 | Insider transaction | Mar 3, 2025 | Feb 27, 2025 |
| 4 | Insider transaction | Mar 3, 2025 | Feb 27, 2025 |
| 8-K |
Current report
Officer or director change
|
Feb 24, 2025 | Feb 24, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 12, 2025 | — |
| 8-K |
Current report
Material agreement, New debt
|
Feb 6, 2025 | Feb 6, 2025 |
| 4 | Insider transaction | Feb 3, 2025 | Jan 31, 2025 |
| 3 | Initial insider ownership | Feb 3, 2025 | Jan 31, 2025 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Feb 3, 2025 | Jan 31, 2025 |
| 10-Q | Quarterly report | Jan 31, 2025 | Dec 27, 2024 |
| 8-K |
Current report
Results of operations
|
Jan 30, 2025 | Jan 30, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Jan 10, 2025 | Jan 9, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Jan 6, 2025 | Jan 6, 2025 |
| 8-K |
Current report
Officer or director change
|
Dec 23, 2024 | Dec 23, 2024 |
| 4 | Insider transaction | Nov 19, 2024 | Nov 18, 2024 |
| 4 | Insider transaction | Nov 19, 2024 | Nov 18, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 12, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 12, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Nov 8, 2024 | — |
| 4 | Insider transaction | Nov 6, 2024 | Nov 5, 2024 |
| SC 13G | Ownership over 5% (passive) | Nov 4, 2024 | — |
| 10-Q | Quarterly report | Nov 1, 2024 | Sep 27, 2024 |
| 8-K |
Current report
Results of operations
|
Oct 31, 2024 | Oct 31, 2024 |
| SC 13G | Ownership over 5% (passive) | Oct 24, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Oct 9, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Oct 3, 2024 | — |
| 8-K |
Current report
Material agreement, Officer or director change
|
Sep 24, 2024 | Sep 20, 2024 |
| 4 | Insider transaction | Sep 3, 2024 | Aug 30, 2024 |
| 8-K |
Current report
Shareholder vote results
|
Aug 12, 2024 | Aug 8, 2024 |
| 4 | Insider transaction | Aug 9, 2024 | Aug 8, 2024 |
| 4 | Insider transaction | Aug 9, 2024 | Aug 8, 2024 |
| 4 | Insider transaction | Aug 9, 2024 | Aug 8, 2024 |
| 4 | Insider transaction | Aug 9, 2024 | Aug 8, 2024 |
| 4 | Insider transaction | Aug 9, 2024 | Aug 8, 2024 |
| 4 | Insider transaction | Aug 9, 2024 | Aug 8, 2024 |
| 4 | Insider transaction | Aug 9, 2024 | Aug 8, 2024 |
| 4 | Insider transaction | Aug 9, 2024 | Aug 8, 2024 |
| 4 | Insider transaction | Aug 9, 2024 | Aug 7, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Aug 9, 2024 | — |
| 8-K |
Current report
Material agreement, New debt, Other events
|
Aug 7, 2024 | Aug 6, 2024 |
| 4 | Insider transaction | Aug 2, 2024 | Aug 1, 2024 |
| 10-Q | Quarterly report | Aug 2, 2024 | Jun 28, 2024 |
| 8-K |
Current report
Results of operations
|
Aug 1, 2024 | Aug 1, 2024 |
| 4 | Insider transaction | Jul 31, 2024 | Jul 29, 2024 |
| 8-K |
Current report
Other events
|
Jul 26, 2024 | Jul 24, 2024 |
| 424B5 | Prospectus supplement | Jul 25, 2024 | — |
| 424B5 | Prospectus supplement | Jul 23, 2024 | — |
| 8-K |
Current report
Material agreement, Results of operations, Officer or director change, Regulation FD disclosure
|
Jul 23, 2024 | Jul 23, 2024 |
| S-3ASR | Automatic shelf registration | Jul 23, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jul 10, 2024 | — |
| ARS | Annual report to shareholders | Jun 26, 2024 | Mar 29, 2024 |
| DEFA14A | Additional proxy material | Jun 26, 2024 | — |
| DEF 14A | Proxy statement | Jun 26, 2024 | Aug 8, 2024 |
| 4 | Insider transaction | Jun 14, 2024 | Jun 13, 2024 |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 144 | Notice of proposed sale | Jun 11, 2024 | — |
| 4 | Insider transaction | Jun 4, 2024 | Jun 3, 2024 |
| 4 | Insider transaction | Jun 4, 2024 | Jun 3, 2024 |
| 4 | Insider transaction | May 31, 2024 | May 30, 2024 |
| 144 | Notice of proposed sale | May 30, 2024 | — |
| 4 | Insider transaction | May 23, 2024 | May 22, 2024 |
| 10-K | Annual report | May 23, 2024 | Mar 29, 2024 |
| 4 | Insider transaction | May 17, 2024 | May 15, 2024 |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Semiconductors & Related Devices (SIC 3674)
- Listed as
- ALGM (Nasdaq)
- Fiscal year ends
- March 31
- Headquarters
- Manchester, NH
- SEC filer status
- Large accelerated filer
- SEC CIK
- 866291
- Former names
- ALLEGRO MICROSYSTEMS, INC. (until Oct 30, 2026); ALLEGRO MICROSYSTEMS INC (until Oct 21, 2020)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.