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 |
|---|---|---|---|
| SD | Specialized disclosure (conflict minerals) | May 29, 2026 | — |
| SD | Specialized disclosure (conflict minerals) | May 30, 2025 | — |
| SD | Specialized disclosure (conflict minerals) | May 31, 2024 | — |
| SD | Specialized disclosure (conflict minerals) | May 15, 2023 | — |
| SD | Specialized disclosure (conflict minerals) | May 31, 2022 | — |
| SD | Specialized disclosure (conflict minerals) | May 28, 2021 | — |
Showing 6 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.
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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.