X0508 4 2023-12-15 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 2023-12-15 4 M 0 6296 172.84 A 27843.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-12-15 4 S 0 26 976.9985 D 27817.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-12-15 4 S 0 51 978.6249 D 27766.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-12-15 4 S 0 151 979.6686 D 27615.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-12-15 4 S 0 8 980.6688 D 27607.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-12-15 4 S 0 200 982.028 D 27407.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-12-15 4 S 0 150 983.1009 D 27257.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-12-15 4 S 0 157 983.8424 D 27100.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-12-15 4 S 0 482 985.0687 D 26618.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-12-15 4 S 0 286 986.1649 D 26332.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-12-15 4 S 0 236 987.1715 D 26096.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-12-15 4 S 0 3495 988.0292 D 22601.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2023-12-15 4 S 0 1054 988.8193 D 21547.513 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Stock Option 172.84 2023-12-15 4 M 0 6296 0.00 D 2019-09-30 2025-11-06 Common Stock 6296 108340 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 purchased. Shares were purchased at varying prices in the range of $976.65 - $977.25. 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 $978.12 - $979.01. 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 $979.44 - $980.40. 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 $980.50 - $980.80. 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 $981.5050 - $982.41. 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 $982.50 - $983.48. 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 $983.51 - $984.50. 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 $984.51 - $985.41. 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 $985.63 - $986.62. 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 $986.63 - $987.62. 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 $987.63 - $988.55. 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 $988.76 - $989.39. 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 2023-12-18