144 0001195347 XXXXXXXX LIVE 0001411207 Allison Transmission Holdings Inc 001-35456 ONE ALLISON WAY Indianapolis IN 46222 (317) 242-5000 ASKREN STANLEY A Director Common Stock Merrill Lynch

225 Liberty St Floor 37 New York NY 10281

32463 1592930.04 91055228 05/22/2023 NYSE Common Stock 03/31/2016 Vesting of restricted stock unit award Allison Transmission Holdings Inc N 463 03/31/2016 Granted as part of issuer equity compensation plan Common Stock 05/12/2016 Vesting of restricted stock unit award Allison Transmission Holdings Inc N 620 05/12/2016 Granted as part of issuer equity compensation plan Common Stock 08/12/2016 Vesting of restricted stock unit award Allison Transmission Holdings Inc N 663 08/12/2016 Granted as part of issuer equity compensation plan Common Stock 11/11/2016 Vesting of restricted stock unit award Allison Transmission Holdings Inc N 603 11/11/2016 Granted as part of issuer equity compensation plan Common Stock 02/10/2017 Vesting of restricted stock unit award Allison Transmission Holdings Inc N 497 02/10/2017 Granted as part of issuer equity compensation plan Common Stock 05/11/2017 Vesting of restricted stock unit award Allison Transmission Holdings Inc N 4187 05/11/2017 Granted as part of issuer equity compensation plan Common Stock 08/11/2017 Vesting of restricted stock unit award Allison Transmission Holdings Inc N 512 08/11/2017 Granted as part of issuer equity compensation plan Common Stock 11/10/2017 Vesting of restricted stock unit award Allison Transmission Holdings Inc N 433 11/10/2017 Granted as part of issuer equity compensation plan Common Stock 02/12/2018 Vesting of restricted stock unit award Allison Transmission Holdings Inc N 450 02/12/2018 Granted as part of issuer equity compensation plan Common Stock 05/10/2018 Vesting of restricted stock unit award Allison Transmission Holdings Inc N 3679 05/10/2018 Granted as part of issuer equity compensation plan Common Stock 08/10/2018 Vesting of restricted stock unit award Allison Transmission Holdings Inc N 409 08/10/2018 Granted as part of issuer equity compensation plan Common Stock 11/12/2018 Vesting of restricted stock unit award Allison Transmission Holdings Inc N 406 11/12/2018 Granted as part of issuer equity compensation plan Common Stock 02/11/2019 Vesting of restricted stock unit award Allison Transmission Holdings Inc N 398 02/11/2019 Granted as part of issuer equity compensation plan Common Stock 05/08/2019 Vesting of restricted stock unit award Allison Transmission Holdings Inc N 413 05/08/2019 Granted as part of issuer equity compensation plan Common Stock 05/09/2019 Vesting of restricted stock unit award Allison Transmission Holdings Inc N 2895 05/09/2019 Granted as part of issuer equity compensation plan Common Stock 08/09/2019 Vesting of restricted stock unit award Allison Transmission Holdings Inc N 491 08/09/2019 Granted as part of issuer equity compensation plan Common Stock 05/04/2022 Vesting of restricted stock unit award Allison Transmission Holdings Inc N 2985 05/04/2022 Granted as part of issuer equity compensation plan Common Stock 05/03/2023 Vesting of restricted stock unit award Allison Transmission Holdings Inc N 12359 05/03/2023 Granted as part of issuer equity compensation plan Y 05/22/2023 Stanley Askren