X0306 4 2016-09-13 0 0001260221 TransDigm Group INC TDG 0001542765 Palmer Peter 1301 EAST 9TH STREET, STE 3000 CLEVELAND OH 44114 0 1 0 0 Executive Vice President Common Stock 2016-09-13 4 M 0 10000 56.86 A 14000 D Common Stock 2016-09-13 4 M 0 10500 97.42 A 24500 D Common Stock 2016-09-13 4 S 0 4303 281.325 D 20197 D Common Stock 2016-09-13 4 S 0 15097 281.8869 D 5100 D Common Stock 2016-09-13 4 S 0 900 283.0472 D 4200 D Common Stock 2016-09-13 4 S 0 200 284.0625 D 4000 D Stock Option 56.86 2016-09-13 4 M 0 10000 0.00 D 2011-09-30 2021-04-22 Common Stock 10000 0 D Stock Option 97.42 2016-09-13 4 M 0 10500 0.00 D 2012-09-30 2021-11-14 Common Stock 10500 0 D Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $280.60 - $281.59. 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 $281.56 - $282.41. 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 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 $282.65 - $283.50. 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 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 $283.94 - $284.19. 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. Halle Fine Terrion as attorney in fact for Peter Palmer 2016-09-14