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
DEFA14A Additional proxy material Mar 25, 2026 —
DEF 14A Proxy statement Mar 25, 2026 May 6, 2026
DEFA14A Additional proxy material Apr 7, 2025 —
DEFA14A Additional proxy material Mar 26, 2025 —
DEF 14A Proxy statement Mar 26, 2025 May 7, 2025
PRE 14A Preliminary proxy statement Mar 10, 2025 May 7, 2025
DEFA14A Additional proxy material Mar 29, 2024 —
DEF 14A Proxy statement Mar 29, 2024 May 8, 2024
DEFA14A Additional proxy material Mar 24, 2023 —
DEF 14A Proxy statement Mar 24, 2023 —
DEFA14A Additional proxy material Mar 25, 2022 —
DEF 14A Proxy statement Mar 25, 2022 May 4, 2022
DEFA14A Additional proxy material Mar 26, 2021 —
DEF 14A Proxy statement Mar 26, 2021 May 5, 2021

Showing 14 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
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)

Other Motor Vehicle Parts & Accessories companies

All 42 Motor Vehicle Parts & Accessories companies

Source: SEC EDGAR filings. This is company-reported data, not investment advice.