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 |
|---|---|---|---|
| 424B5 | Prospectus supplement | Jul 25, 2024 | — |
| 424B5 | Prospectus supplement | Jul 23, 2024 | — |
| S-3ASR | Automatic shelf registration | Jul 23, 2024 | — |
| 424B7 | Filing | Nov 2, 2021 | — |
| FWP | Free writing prospectus | Nov 1, 2021 | — |
| S-3ASR | Automatic shelf registration | Nov 1, 2021 | — |
| 424B4 | Prospectus | Feb 8, 2021 | — |
| S-1MEF | Filing | Feb 4, 2021 | — |
| S-1 | Registration statement | Feb 2, 2021 | — |
| S-8 | Employee stock plan registration | Oct 30, 2020 | — |
| 424B4 | Prospectus | Oct 30, 2020 | — |
| S-1/A | Amended registration statement | Oct 21, 2020 | — |
| S-1/A | Amended registration statement | Oct 13, 2020 | — |
| S-1 | Registration statement | Oct 6, 2020 | — |
| S-1/A | Amended registration statement | Mar 7, 2008 | — |
| S-1/A | Amended registration statement | Jan 29, 2008 | — |
| S-1/A | Amended registration statement | Nov 30, 2007 | — |
| S-1 | Registration statement | Aug 8, 2007 | — |
Showing 18 filings. 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.
New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.
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.