X0306 4 2020-01-09 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 2020-01-09 4 M 0 17083 82.67 A 17083 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-01-09 4 S 0 1208 586.3842 D 15875 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-01-09 4 S 0 1163 587.0165 D 14712 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-01-09 4 S 0 629 588.0786 D 14083 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-01-09 4 S 0 2302 589.2189 D 11781 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-01-09 4 S 0 3740 590.5269 D 8041 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-01-09 4 S 0 3332 591.1144 D 4709 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-01-09 4 S 0 1164 592.3754 D 3545 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-01-09 4 S 0 2328 593.708 D 1217 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-01-09 4 S 0 1014 594.6012 D 203 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Common Stock 2020-01-09 4 S 0 203 595.2384 D 0 I W. Nicholas Howley Family Trust u/a/d 4/23/99 Stock Option 82.67 2020-01-09 4 M 0 17083 0.00 D 2014-09-30 2021-03-04 Common Stock 17083 205004 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 $585.60 - $586.56. 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 $586.60 - $587.54. 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 $587.73 - $588.43. 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 $588.76 - $589.73. 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 $589.81 - $590.80. 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 $590.82 - $591.68. 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 $591.97 - $592.92. 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 $593.05 - $594.03. 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 $594.13 - $594.98. 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 $595.13 - $595.30. 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 2020-01-10