X0508 4 2025-07-23 0000001750 AAR CORP AIR 0001679985 Pachapa Eric 1100 N. WOOD DALE ROAD WOOD DALE IL 60191 1 VP-CAO & Controller 0 Common Stock 2025-07-23 4 A 0 1135 0 A 29674.32 D Common Stock 2025-07-23 4 A 0 3400 0 A 33074.32 D Common Stock 2025-07-23 4 M 0 3837 18.94 A 36911.32 D Common Stock 2025-07-23 4 S 0 3837 78.1213 D 33074.32 D Common Stock 2025-07-23 4 S 0 1911 78.6978 D 31163.32 D Stock Option 79.45 2025-07-23 4 A 0 3130 0 A 2026-07-31 2035-07-23 Common Stock 3130 3130 D Stock Option 18.94 2025-07-23 4 M 0 3837 0 D 2021-07-31 2030-07-13 Common Stock 3837 3837 D Award of stock pursuant to Restricted Stock Agreement in transaction exempt under Rule 16b-3. Award of stock pursuant to a Performance Restricted Stock Agreement in a transaction exempt under Rule 16b-3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $77.09 to $78.66 inclusive. The reporting person undertakes to provide AAR CORP. any security holder of AAR CORP. or the staff of the Securities 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 price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $78.32 to $79.05 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 awarded stock option vests and becomes exercisable in 1/3 annual installments beginning on July 31, 2026 and shall vest as follows: 33 an 1/3% on each of July 31, 2026, July 31, 2027 and July 31, 2028. The reporting person received a grant of stock options for 50,020 shares of common stock on July 13, 2020. The options vested in 33 1/3% increments on July 31, 2021, July 31, 2022 and July 31, 2023. /s/ Katherine Kwiat, power of attorney 2025-07-25