X0508 4 2025-11-05 0000001750 AAR CORP AIR 0001554880 Holmes John McClain III 1100 N. WOOD DALE ROAD WOOD DALE IL 60191 1 1 Chairman, President & CEO 1 Common Stock 2025-11-05 4 S 0 38462 83.501 D 260141 D Transaction in accordance with 10b5-1 trading plan adopted by John M. Holmes on Aug. 6, 2025. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $82.1200 to $85.1399 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. /s/ Katherine Kwiat, power of attorney 2025-11-06