Form 4 Filing for EVERITT DAVID C

This filing details a transaction by EVERITT DAVID C, a director at Allison Transmission Holdings Inc. On August 31, 2026, Mr. Everitt acquired 64 Dividend Equivalent Rights (DERs) related to previously awarded deferred stock units (DSUs). These DERs economically mirror shares of common stock and vest proportionally with the DSUs. The transaction code was 'A' (for acquisition), and the price per share was $0.00. Following this transaction, Mr. Everitt holds 3826 shares. The report was signed on September 2, 2026.