X0306 4 2020-11-09 0 0001260221 TransDigm Group INC TDG 0001352573 Howley W Nicholas 1301 EAST NINTH STREET SUITE 3000 CLEVELAND OH 44114 1 1 0 0 Exec. Chairman of the Board Common Stock 2020-11-09 4 M 0 42181 592.596 A 42181 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 605 572.3587 D 41576 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 1045 573.8909 D 40531 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 3102 575.1615 D 37429 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 548 575.6877 D 36881 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 1813 576.724 D 35068 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 700 577.825 D 34368 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 925 578.8597 D 33443 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 3643 579.481 D 29800 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 700 580.4057 D 29100 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 692 581.8641 D 28408 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 208 582.9273 D 28200 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 607 583.9572 D 27593 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 961 585.0073 D 26632 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 209 586.657 D 26423 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 500 587.6216 D 25923 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 100 588.725 D 25823 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 178 589.9616 D 25645 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 600 591.5596 D 25045 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 100 593.285 D 24945 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 1119 595.7801 D 23826 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 3573 596.9751 D 20253 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 1621 597.6404 D 18632 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 614 598.8674 D 18018 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 4040 600.066 D 13978 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 701 601.0689 D 13277 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 3105 602.0413 D 10172 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 641 603.3017 D 9531 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 2141 603.9692 D 7390 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-11-09 4 S 0 4155 605.1924 D 3235 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Stock Option 82.67 2020-11-09 4 M 0 42181 0.00 D 2014-09-30 2021-03-04 Common Stock 42181 22465 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $572.12 - $572.83. 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 $573.49 - $574.47. 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 $574.53 - $575.47. 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 $575.53 - $576.02. 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 $576.58 - $577.00. 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 $577.72 - $578.01. 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 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 $578.09 - $579.05. 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 $579.11 - $580.09. 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 $580.26 - $580.79. 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 $581.46 - $582.40. 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 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 $582.61 - $583.25. 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 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 $583.64 - $584.52. 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 $585.00 - $585.06. 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 $586.01- $586.91. 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 $587.49 - $587.80. 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 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 $589.96 - $589.97. 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 $591.14 - $591.97. 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 $595.54 - $596.53. 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 $596.54 - $597.53. 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 $597.56 - $598.01. 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 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 $598.56 - $599.04. 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 $599.56 - $600.55. 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 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 $600.60 - $601.40. 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 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 $601.63 - $602.35. 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 $602.82 - $603.78. 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 $603.89 - $604.72. 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 $605.02 - $606.01. 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 sold at each separate price. All transactions reported hereunder were made pursuant to an established 10b5-1 Plan. Halle Fine Terrion as attorney in fact for W. Nicholas Howley 2020-11-10