X0306 4 2022-02-23 0001411207 Allison Transmission Holdings Inc ALSN 0001661939 Pittard Dana JH C/O ALLISON TRANSMISSION HOLDINGS, INC. ONE ALLISON WAY INDIANAPOLIS IN 46222 0 1 0 0 VP, Defense Programs Common Stock 2022-02-24 4 G 0 1352 0 D 3660 D Common Stock 2022-02-24 4 G 0 1352 0 A 10858 I Pittard Living Trust Employee Stock Option (right to buy) 39.42 2022-02-23 4 A 0 8057 0 A 2032-02-23 Common Stock 8057 8057 D Restricted Stock Units 2022-02-23 4 A 0 2686 0 A Common Stock 2686 2686 D Represents transfer of shares to the Pittard Living Trust. The option vests in three equal annual installments beginning on February 23, 2023. Each restricted stock unit ("RSU") represents a contingent right to receive one share of Allison Transmission Holdings, Inc. common stock. The RSUs vests in three equal annual installments beginning on February 23, 2023. /s/ Jacalyn C. Bolles, attorney-in-fact 2022-02-25