X0508 4 2023-10-04 0000001750 AAR CORP AIR 0001554880 Holmes John McClain III 1100 N. WOOD DALE ROAD WOOD DALE IL 60191 1 1 Chairman, President & CEO 0 Common Stock 2023-10-04 4 M 0 12363 35.26 A 334129 D Common Stock 2023-10-04 4 S 0 12363 59.0374 D 321766 D Stock Option 35.26 2023-10-04 4 M 0 12363 0 D 2018-07-31 2027-07-10 Common Stock 12363 12803 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $59.000 to $59.2995 inclusive. The reporting person undertakes to provide AAR CORP., any security holder of AAR CORP., 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. The reporting person received a grant of stock options for 96,000 shares of common stock on July 10, 2017. The stock options vested in 33 1/3% increments on each of July 31, 2018, July 31, 2019 and July 31, 2020. /s/ Katherine Kwiat, power of attorney 2023-10-05