X0306 4 2023-02-15 0 0001260221 TransDigm Group INC TDG 0001352573 Howley W Nicholas 1301 EAST NINTH STREET SUITE 3000 CLEVELAND OH 44114 1 0 0 0 Common Stock 2023-02-15 4 M 0 6500 173.29 A 28047.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-02-15 4 S 0 100 750.00 D 27947.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-02-15 4 S 0 600 752.1533 D 27347.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-02-15 4 S 0 1200 753.3894 D 26147.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-02-15 4 S 0 2289 754.5184 D 23858.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-02-15 4 S 0 856 755.5205 D 23002.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-02-15 4 S 0 455 756.5751 D 22547.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-02-15 4 S 0 950 757.5994 D 21597.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-02-15 4 S 0 50 758.14 D 21547.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Stock Option 173.29 2023-02-15 4 M 0 6500 0.00 D 2019-09-30 2024-11-13 Common Stock 6500 130190 I W. Nicholas Howley Family Trust u/a/d 4/23/99 The exercise price has been adjusted for dividends declared since August 1, 2022. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $752.00 - $752.53. 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 $753.01 - $753.97. 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 $754.01 - $755.00. 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 $755.01 - $756.00. 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 $756.02 - $756.99. 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 $757.08 - $757.815. 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. All transactions reported hereunder were made pursuant to an established 10B5-1 plan. Amy Paszt at attorney in fact for W. Nicholas Howley. 2023-02-17