X0306 4 2019-08-06 0001411207 Allison Transmission Holdings Inc ALSN 0001661939 Pittard Dana JH ONE ALLISON WAY INDIANAPOLIS IN 46222 0 1 0 0 VP, Defense Programs Common Stock 2019-08-06 4 G 0 2276 0 D 4612 D Common Stock 2019-08-06 4 G 0 2276 0 A 2276 I Pittard Living Trust Common Stock 2020-02-22 4 M 0 2465 A 7077 D Common Stock 2020-02-22 4 M 0 103 A 7180 D Common Stock 2020-02-22 4 F 0 875 44.55 D 6305 D Common Stock 2020-02-25 4 G 0 4512 0 D 1793 D Common Stock 2020-02-25 4 G 0 4512 0 A 6788 I Pittard Living Trust Performance Stock Units 2020-02-21 4 A 0 2021 0 A Common Stock 2021 2021 D Restricted Stock Units 2020-02-22 4 M 0 2465 0 D Common Stock 2465 0 D Dividend Equivalent Rights 2020-02-22 4 M 0 103 0 D Common Stock 103 77 D Employee Stock Option (right to buy) 43.22 2020-02-25 4 A 0 5937 0 A 2030-02-25 Common Stock 5937 5937 D Restricted Stock Units 2020-02-25 4 A 0 1979 0 A Common Stock 1979 1979 D Represents a transfer of shares to the Pittard Living Trust. Settlement of restricted stock units ("RSUs") granted on February 22, 2017. Each RSU represents a contingent right to receive one share of Allison Transmission Holdings, Inc. ("ALSN") common stock. Settlement of dividend equivalent rights ("DERs"). The DERs accrued when and as dividends were paid on ALSN common stock and vest proportionately with the RSU to which they relate. Each DER is the economic equivalent of one share of ALSN common stock. Represents shares withheld by ALSN to satisfy tax withholding obligations on the vesting of RSUs and DERs. Each performance-based restricted stock unit ("PSUs") represents a contingent right to receive one share of ALSN common stock. On February 22, 2017, the reporting person was granted PSUs with a number of PSUs earned to be determined based on the extent to which certain performance conditions were met for a performance period of 2017 - 2019. As determined on February 21, 2020, based on ALSN's actual performance for 2017 - 2019, the reporting person earned 2,021 PSUs. Earned PSUs will vest on February 28, 2020. The option vests on February 25, 2023. Each RSUs represents a contingent right to receive one share of Allison Transmission Holdings, Inc. common stock. The RSUs vest on February 25, 2023. /s/ Jacalyn C. Bolles, attorney-in-fact 2020-02-25