Allison Transmission Holdings Inc SEC filings ALSN
Allison Transmission Holdings Inc has 1,001 filings in SEC EDGAR's recent list, going back to Sep 2, 2020. Its latest annual report, Form ARS, was filed on Mar 25, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 4, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Nov 2, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| SCHEDULE 13G | Ownership over 5% (passive) | Oct 27, 2026 | — |
| 4 | Insider transaction | Sep 2, 2026 | Aug 31, 2026 |
| 4 | Insider transaction | Sep 2, 2026 | Aug 31, 2026 |
| 4 | Insider transaction | Sep 2, 2026 | Aug 31, 2026 |
| 4 | Insider transaction | Sep 2, 2026 | Aug 31, 2026 |
| 4 | Insider transaction | Sep 2, 2026 | Aug 31, 2026 |
| 4 | Insider transaction | Sep 2, 2026 | Aug 31, 2026 |
| 4 | Insider transaction | Sep 2, 2026 | Aug 31, 2026 |
| 4 | Insider transaction | Sep 2, 2026 | Aug 31, 2026 |
| 4 | Insider transaction | Sep 2, 2026 | Aug 31, 2026 |
| 4 | Insider transaction | Sep 2, 2026 | Aug 31, 2026 |
| 4 | Insider transaction | Sep 2, 2026 | Aug 31, 2026 |
| 4 | Insider transaction | Sep 2, 2026 | Aug 31, 2026 |
| 4 | Insider transaction | Sep 2, 2026 | Aug 31, 2026 |
| 4 | Insider transaction | Aug 25, 2026 | Aug 21, 2026 |
| 144 | Notice of proposed sale | Aug 21, 2026 | — |
| 4 | Insider transaction | Aug 13, 2026 | Aug 11, 2026 |
| 144 | Notice of proposed sale | Aug 11, 2026 | — |
| 4 | Insider transaction | Aug 11, 2026 | Aug 10, 2026 |
| 144 | Notice of proposed sale | Aug 10, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 31, 2026 | — |
| 4 | Insider transaction | Jun 8, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 2, 2026 | May 29, 2026 |
| 4 | Insider transaction | Jun 2, 2026 | May 29, 2026 |
| 4 | Insider transaction | Jun 2, 2026 | May 29, 2026 |
| 4 | Insider transaction | Jun 2, 2026 | May 29, 2026 |
| 4 | Insider transaction | Jun 2, 2026 | May 29, 2026 |
| 4 | Insider transaction | Jun 2, 2026 | May 29, 2026 |
| 4 | Insider transaction | Jun 2, 2026 | May 29, 2026 |
| 4 | Insider transaction | Jun 2, 2026 | May 29, 2026 |
| 4 | Insider transaction | Jun 2, 2026 | May 29, 2026 |
| 4 | Insider transaction | Jun 2, 2026 | May 29, 2026 |
| 4 | Insider transaction | Jun 2, 2026 | May 29, 2026 |
| 4 | Insider transaction | Jun 2, 2026 | May 29, 2026 |
| 4 | Insider transaction | Jun 2, 2026 | May 29, 2026 |
| 4 | Insider transaction | May 11, 2026 | May 8, 2026 |
| 144 | Notice of proposed sale | May 8, 2026 | — |
| 4 | Insider transaction | May 8, 2026 | May 7, 2026 |
| 4 | Insider transaction | May 8, 2026 | May 7, 2026 |
| 4 | Insider transaction | May 8, 2026 | May 7, 2026 |
| 4 | Insider transaction | May 8, 2026 | May 6, 2026 |
| 4 | Insider transaction | May 8, 2026 | May 6, 2026 |
| 4 | Insider transaction | May 8, 2026 | May 6, 2026 |
| 4 | Insider transaction | May 8, 2026 | May 6, 2026 |
| 4 | Insider transaction | May 8, 2026 | May 6, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 29, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 28, 2026 | — |
| 4 | Insider transaction | Apr 16, 2026 | Apr 14, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 26, 2026 | — |
| 4 | Insider transaction | Mar 24, 2026 | Mar 20, 2026 |
| 4 | Insider transaction | Mar 24, 2026 | Mar 20, 2026 |
| 4 | Insider transaction | Mar 24, 2026 | Mar 20, 2026 |
| 4 | Insider transaction | Mar 24, 2026 | Mar 20, 2026 |
| 4 | Insider transaction | Mar 24, 2026 | Mar 20, 2026 |
| 4 | Insider transaction | Mar 24, 2026 | Mar 20, 2026 |
| 4 | Insider transaction | Mar 24, 2026 | Mar 20, 2026 |
| 4 | Insider transaction | Mar 24, 2026 | Mar 20, 2026 |
| 4 | Insider transaction | Mar 24, 2026 | Mar 20, 2026 |
| 4 | Insider transaction | Mar 24, 2026 | Mar 20, 2026 |
| 4 | Insider transaction | Mar 24, 2026 | Mar 20, 2026 |
| 4 | Insider transaction | Mar 24, 2026 | Mar 20, 2026 |
| 4 | Insider transaction | Mar 24, 2026 | Mar 20, 2026 |
| 4 | Insider transaction | Mar 10, 2026 | Mar 9, 2026 |
| 144 | Notice of proposed sale | Mar 9, 2026 | — |
| 144 | Notice of proposed sale | Mar 5, 2026 | — |
| 4 | Insider transaction | Mar 3, 2026 | Feb 28, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Feb 28, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Feb 28, 2026 |
| 144 | Notice of proposed sale | Mar 2, 2026 | — |
| 4 | Insider transaction | Feb 27, 2026 | Feb 25, 2026 |
| 4 | Insider transaction | Feb 27, 2026 | Feb 25, 2026 |
| 4 | Insider transaction | Feb 27, 2026 | Feb 25, 2026 |
| 4 | Insider transaction | Feb 27, 2026 | Feb 25, 2026 |
| 4 | Insider transaction | Feb 27, 2026 | Feb 25, 2026 |
| 144/A | Filing | Feb 26, 2026 | — |
| 144 | Notice of proposed sale | Feb 26, 2026 | — |
| 144 | Notice of proposed sale | Feb 25, 2026 | — |
| 4 | Insider transaction | Feb 24, 2026 | Feb 21, 2026 |
| 4 | Insider transaction | Feb 24, 2026 | Feb 21, 2026 |
| 4 | Insider transaction | Feb 24, 2026 | Feb 22, 2026 |
| 4 | Insider transaction | Feb 23, 2026 | Feb 19, 2026 |
| 4 | Insider transaction | Feb 23, 2026 | Feb 19, 2026 |
| 4 | Insider transaction | Feb 23, 2026 | Feb 19, 2026 |
| 4 | Insider transaction | Feb 17, 2026 | Feb 13, 2026 |
| 144 | Notice of proposed sale | Feb 13, 2026 | — |
| 4 | Insider transaction | Feb 13, 2026 | Feb 11, 2026 |
| 4 | Insider transaction | Feb 13, 2026 | Feb 11, 2026 |
| 4 | Insider transaction | Feb 13, 2026 | Feb 11, 2026 |
| 4 | Insider transaction | Feb 10, 2026 | Feb 6, 2026 |
| 4 | Insider transaction | Feb 10, 2026 | Feb 6, 2026 |
| 144 | Notice of proposed sale | Jan 15, 2026 | — |
| 4 | Insider transaction | Jan 5, 2026 | Jan 1, 2026 |
| 3 | Initial insider ownership | Jan 5, 2026 | Jan 1, 2026 |
| 4 | Insider transaction | Jan 2, 2026 | Dec 31, 2025 |
| 144 | Notice of proposed sale | Dec 31, 2025 | — |
| 4 | Insider transaction | Dec 9, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 9, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 9, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 9, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 9, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 9, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 9, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 9, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 9, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 9, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 9, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 9, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 9, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 9, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 9, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 9, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 9, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Nov 12, 2025 | Nov 7, 2025 |
| 4 | Insider transaction | Nov 12, 2025 | Nov 7, 2025 |
| 4 | Insider transaction | Oct 1, 2025 | Sep 30, 2025 |
| 144 | Notice of proposed sale | Sep 30, 2025 | — |
| 4 | Insider transaction | Sep 3, 2025 | Aug 29, 2025 |
| 4 | Insider transaction | Sep 3, 2025 | Aug 29, 2025 |
| 4 | Insider transaction | Sep 3, 2025 | Aug 29, 2025 |
| 4 | Insider transaction | Sep 3, 2025 | Aug 29, 2025 |
| 4 | Insider transaction | Sep 3, 2025 | Aug 29, 2025 |
| 4 | Insider transaction | Sep 3, 2025 | Aug 29, 2025 |
| 4 | Insider transaction | Sep 3, 2025 | Aug 29, 2025 |
| 4 | Insider transaction | Sep 3, 2025 | Aug 29, 2025 |
| 4 | Insider transaction | Sep 3, 2025 | Aug 29, 2025 |
| 4 | Insider transaction | Sep 3, 2025 | Aug 29, 2025 |
| 4 | Insider transaction | Sep 3, 2025 | Aug 29, 2025 |
| 4 | Insider transaction | Sep 3, 2025 | Aug 29, 2025 |
| 4 | Insider transaction | Sep 3, 2025 | Aug 29, 2025 |
| 4 | Insider transaction | Sep 3, 2025 | Aug 29, 2025 |
| 4 | Insider transaction | Sep 3, 2025 | Aug 29, 2025 |
| 4 | Insider transaction | Sep 3, 2025 | Aug 29, 2025 |
| 4 | Insider transaction | Sep 3, 2025 | Aug 29, 2025 |
| 4/A | Filing | Aug 25, 2025 | Aug 14, 2025 |
| 4 | Insider transaction | Aug 15, 2025 | Aug 14, 2025 |
| 4 | Insider transaction | Aug 11, 2025 | Aug 7, 2025 |
| 4 | Insider transaction | Aug 11, 2025 | Aug 7, 2025 |
| 4 | Insider transaction | Jul 1, 2025 | Jun 30, 2025 |
| 144 | Notice of proposed sale | Jun 30, 2025 | — |
| 4 | Insider transaction | Jun 5, 2025 | Jun 4, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | May 30, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | May 30, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | May 30, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | May 30, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | May 30, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | May 30, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | May 30, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | May 30, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | May 30, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | May 30, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | May 30, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | May 30, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | May 30, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | May 30, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | May 30, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | May 30, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | May 30, 2025 |
| 4 | Insider transaction | May 23, 2025 | May 21, 2025 |
| 144 | Notice of proposed sale | May 21, 2025 | — |
| 4 | Insider transaction | May 9, 2025 | May 7, 2025 |
| 4 | Insider transaction | May 9, 2025 | May 7, 2025 |
| 4 | Insider transaction | May 9, 2025 | May 7, 2025 |
| 4 | Insider transaction | May 9, 2025 | May 7, 2025 |
| 4 | Insider transaction | May 9, 2025 | May 7, 2025 |
| 4 | Insider transaction | May 9, 2025 | May 8, 2025 |
| 4 | Insider transaction | May 9, 2025 | May 7, 2025 |
| 4 | Insider transaction | May 9, 2025 | May 7, 2025 |
| 4 | Insider transaction | May 9, 2025 | May 8, 2025 |
| 4 | Insider transaction | May 9, 2025 | May 7, 2025 |
| 4 | Insider transaction | May 9, 2025 | May 8, 2025 |
| 144 | Notice of proposed sale | May 7, 2025 | — |
| 4 | Insider transaction | Apr 16, 2025 | Apr 14, 2025 |
| 3 | Initial insider ownership | Apr 16, 2025 | Apr 14, 2025 |
| 4 | Insider transaction | Apr 3, 2025 | Apr 1, 2025 |
| 144 | Notice of proposed sale | Apr 1, 2025 | — |
| 4 | Insider transaction | Mar 18, 2025 | Mar 14, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 14, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 14, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 14, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 14, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 14, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 14, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 14, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 14, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 14, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 6, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 14, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 14, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 14, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 14, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 14, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 14, 2025 |
| 4 | Insider transaction | Mar 10, 2025 | Mar 6, 2025 |
| 144 | Notice of proposed sale | Mar 6, 2025 | — |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
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
- Motor Vehicle Parts & Accessories (SIC 3714)
- Listed as
- ALSN (NYSE)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Indianapolis, IN
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1411207
- Former names
- Allison Transmission Holdings Inc (until Nov 4, 2026)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.