X0306 4 2022-11-11 0001411207 Allison Transmission Holdings Inc ALSN 0001543507 Scroggins Eric C. C/O ALLISON TRANSMISSION HOLDINGS, INC. ONE ALLISON WAY INDIANAPOLIS IN 46222 0 1 0 0 VP, Gen. Counsel Common Stock 2022-11-11 4 S 0 6248 42.9235 D 21568 D The price reported is a weighted price. These shares were sold in multiple transactions at per share prices ranging from $42.7700-$43.1150. The reporting person undertakes to provide the Company, an security holder of the Company or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. /s/ Jacalyn C. Bolles attorney-in-fact 2022-11-14