X0609 4 2026-07-15 false 0001260221 TransDigm Group INC TDG 0001656109 Reiss Joel false 1350 EUCLID AVE SUITE 1600 CLEVELAND OH 44115 false true false false Co-Chief Operating Officer true Common Stock 2026-07-15 4 S false 190.00 1230.0563 D 3824.00 D Common Stock 2026-07-15 4 S false 70.00 1231.0943 D 3754.00 D Common Stock 2026-07-15 4 S false 144.00 1232.3369 D 3610.00 D Common Stock 2026-07-15 4 S false 10.00 1233.38 D 3600.00 D Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,229.6600 - $1,230.5400. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,230.8800 - $1,231.4800. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,231.9900 - $1,232.8300. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price. Due to a 30-line item limitation in Table 1, this is the second of two Form 4s filed by the reporting person for this transaction. /s/ Rachel L. Quinlan as attorney in fact for Joel Reiss 2026-07-17