X0508 4 2023-11-15 0 0001260221 TransDigm Group INC TDG 0001352573 Howley W Nicholas 1301 EAST NINTH STREET SUITE 3000 CLEVELAND OH 44114 1 0 0 0 1 Common Stock 2023-11-15 4 M 0 7060 207.84 A 28607.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-11-15 4 S 0 556 991.6635 D 28051.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-11-15 4 S 0 684 992.6815 D 27367.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-11-15 4 S 0 571 993.8106 D 26796.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-11-15 4 S 0 2120 994.7379 D 24676.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-11-15 4 S 0 1011 995.8698 D 23665.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-11-15 4 S 0 1800 996.6998 D 21865.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-11-15 4 S 0 283 997.4613 D 21582.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-11-15 4 S 0 35 998.7161 D 21547.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Stock Option 207.84 2023-11-15 4 M 0 7060 0.00 D 2019-09-30 2025-11-06 Common Stock 7060 116457 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Price reported constitutes the average weighted price of shares purchased. Shares were purchased at varying prices in the range of $991.3000 - $992.2550. 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 purchased at each separate price. Price reported constitutes the average weighted price of shares purchased. Shares were purchased at varying prices in the range of $992.3100 - $993.3000. 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 purchased at each separate price. Price reported constitutes the average weighted price of shares purchased. Shares were purchased at varying prices in the range of $993.3100 - $994.3000. 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 purchased at each separate price. Price reported constitutes the average weighted price of shares purchased. Shares were purchased at varying prices in the range of $994.3100 - $995.2900. 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 purchased at each separate price. Price reported constitutes the average weighted price of shares purchased. Shares were purchased at varying prices in the range of $995.2950 - $996.2850. 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 purchased at each separate price. Price reported constitutes the average weighted price of shares purchased. Shares were purchased at varying prices in the range of $996.2900 - $997.2650. 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 purchased at each separate price. Price reported constitutes the average weighted price of shares purchased. Shares were purchased at varying prices in the range of $997.3100 - $998.2150. 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 purchased at each separate price. Price reported constitutes the average weighted price of shares purchased. Shares were purchased at varying prices in the range of $998.6200 - $998.9750. 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 purchased at each separate price. /s/ Gabrielle Feuer as attorney-in-fact 2023-11-16