X0306 4 2022-08-15 0001411207 Allison Transmission Holdings Inc ALSN 0001756611 Christman Philip J C/O ALLISON TRANSMISSION ONE ALLISON WAY INDIANAPOLIS IN 46222 1 0 0 0 Restricted Stock Units 2022-08-15 4 A 0 2770 0 A Common Stock 2770 2770 D The restricted stock units ("RSUs") represent the reporting person's annual equity award under the Allison Transmission Holdings, Inc. (the "Company") Sixth Amended and Restated Non-Employee Director Compensation Policy. Each RSU represents a contingent right to receive one share of the Company's common stock. The RSUs vest on the date of the next annual meeting of the stockholders of the Company. Unvested RSUs earn dividend equivalents when dividends are declared on the Company's common stock. The number of RSUs received was calculated based on $39.26, which was the closing price of the Company's common stock on the grant date. Jacalyn C. Bolles, Attorney-in-Fact 2022-08-17