X0508 4 2026-01-05 0001260221 TransDigm Group INC TDG 0001431675 Stein Kevin M 1350 EUCLID AVE SUITE 1600 CLEVELAND OH 44115 true false false false true Common Stock 2026-01-05 4 M false 17940 105.88 A 26098 I Fortuna Trust dated June 1, 2018 Common Stock 2026-01-05 4 M false 7060 341.28 A 33158 I Fortuna Trust dated June 1, 2018 Common Stock 2026-01-05 4 S false 560 1361.5900 D 32598 I Fortuna Trust dated June 1, 2018 Common Stock 2026-01-05 4 S false 20 1363.0800 D 32578 I Fortuna Trust dated June 1, 2018 Common Stock 2026-01-05 4 S false 160 1364.5653 D 32418 I Fortuna Trust dated June 1, 2018 Common Stock 2026-01-05 4 S false 255 1367.1848 D 32163 I Fortuna Trust dated June 1, 2018 Common Stock 2026-01-05 4 S false 716 1368.1129 D 31447 I Fortuna Trust dated June 1, 2018 Common Stock 2026-01-05 4 S false 3956 1369.0453 D 27491 I Fortuna Trust dated June 1, 2018 Common Stock 2026-01-05 4 S false 4457 1370.1206 D 23034 I Fortuna Trust dated June 1, 2018 Common Stock 2026-01-05 4 S false 1777 1371.0914 D 21257 I Fortuna Trust dated June 1, 2018 Common Stock 2026-01-05 4 S false 2084 1372.0398 D 19173 I Fortuna Trust dated June 1, 2018 Common Stock 2026-01-05 4 S false 481 1373.0119 D 18692 I Fortuna Trust dated June 1, 2018 Common Stock 2026-01-05 4 S false 1020 1374.2481 D 17672 I Fortuna Trust dated June 1, 2018 Common Stock 2026-01-05 4 S false 1338 1375.1611 D 16334 I Fortuna Trust dated June 1, 2018 Common Stock 2026-01-05 4 S false 1587 1376.1458 D 14747 I Fortuna Trust dated June 1, 2018 Common Stock 2026-01-05 4 S false 403 1377.2956 D 14344 I Fortuna Trust dated June 1, 2018 Common Stock 2026-01-05 4 S false 1239 1378.5069 D 13105 I Fortuna Trust dated June 1, 2018 Common Stock 2026-01-05 4 S false 1218 1379.6401 D 11887 I Fortuna Trust dated June 1, 2018 Common Stock 2026-01-05 4 S false 385 1380.5337 D 11502 I Fortuna Trust dated June 1, 2018 Common Stock 2026-01-05 4 S false 903 1381.5268 D 10599 I Fortuna Trust dated June 1, 2018 Common Stock 2026-01-05 4 S false 1867 1382.6226 D 8732 I Fortuna Trust dated June 1, 2018 Common Stock 2026-01-05 4 S false 274 1384.1186 D 8458 I Fortuna Trust dated June 1, 2018 Common Stock 2026-01-05 4 S false 300 1387.0350 D 8158 I Fortuna Trust dated June 1, 2018 Stock Option 105.88 2026-01-05 4 M false 17940 0 D 2018-09-30 2028-04-25 Common Stock 17940 20000 I Fortuna Trust dated June 1, 2018 Stock Option 341.28 2026-01-05 4 M false 7060 0 D 2023-09-30 2029-11-15 Common Stock 7060 42940 I Fortuna Trust dated June 1, 2018 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 $1,364.4650 - $1,365.0000. 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 $1,366.5600 - $1,367.4900. 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 $1,367.5700 - $1,368.5500. 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 $1,368.5800 - $1,369.5700. 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 $1,369.5800 - $1,370.5600. 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 $1,370.5800 - $1,371.5200. 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 $1,371.6300 - $1,372.6200. 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 $1,372.6300 - $1,373.5700. 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 $1,373.7400 - $1,374.7300. 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 $1,374.7750 - $1,375.7200. 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 $1,375.7900 - $1,376.7600. 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 $1,376.8600 - $1,377.7800. 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 $1,377.9500 - $1,378.9200. 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 $1,379.0000 - $1,379.9800. 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 $1,380.0000 - $1,380.9800. 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 $1,381.0200 - $1,381.9400. 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 $1,382.1600 - $1,383.0500. 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 $1,383.6400 - $1,384.4900. 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 $1,387.0300 - $1,387.0400. 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. /s/ Rachel Quinlan as attorney in fact for Kevin Stein 2026-01-06