X0609 4 2026-07-15 false 0001260221 TransDigm Group INC TDG 0001656109 Reiss Joel false 1350 EUCLID AVE SUITE 1600 CLEVELAND OH 44115 false true false false Co-Chief Operating Officer true Common Stock 2026-07-15 4 M false 3900.00 284.97 A 7500.00 D Common Stock 2026-07-15 4 S false 10.00 1195.204 D 7490.00 D Common Stock 2026-07-15 4 S false 70.00 1197.851 D 7420.00 D Common Stock 2026-07-15 4 S false 80.00 1198.795 D 7340.00 D Common Stock 2026-07-15 4 S false 156.00 1200.1437 D 7184.00 D Common Stock 2026-07-15 4 S false 160.00 1201.3181 D 7024.00 D Common Stock 2026-07-15 4 S false 116.00 1202.4405 D 6908.00 D Common Stock 2026-07-15 4 S false 74.00 1203.8026 D 6834.00 D Common Stock 2026-07-15 4 S false 10.00 1204.60 D 6824.00 D Common Stock 2026-07-15 4 S false 30.00 1206.69 D 6794.00 D Common Stock 2026-07-15 4 S false 60.00 1208.5072 D 6734.00 D Common Stock 2026-07-15 4 S false 80.00 1209.1975 D 6654.00 D Common Stock 2026-07-15 4 S false 30.00 1210.3053 D 6624.00 D Common Stock 2026-07-15 4 S false 90.00 1211.5011 D 6534.00 D Common Stock 2026-07-15 4 S false 110.00 1212.5936 D 6424.00 D Common Stock 2026-07-15 4 S false 170.00 1213.7275 D 6254.00 D Common Stock 2026-07-15 4 S false 211.00 1215.1264 D 6043.00 D Common Stock 2026-07-15 4 S false 239.00 1216.2243 D 5804.00 D Common Stock 2026-07-15 4 S false 60.00 1217.2467 D 5744.00 D Common Stock 2026-07-15 4 S false 90.00 1218.22 D 5654.00 D Common Stock 2026-07-15 4 S false 90.00 1219.2991 D 5564.00 D Common Stock 2026-07-15 4 S false 140.00 1220.4962 D 5424.00 D Common Stock 2026-07-15 4 S false 210.00 1221.5297 D 5214.00 D Common Stock 2026-07-15 4 S false 60.00 1222.5986 D 5154.00 D Common Stock 2026-07-15 4 S false 138.00 1223.512 D 5016.00 D Common Stock 2026-07-15 4 S false 509.00 1224.6206 D 4507.00 D Common Stock 2026-07-15 4 S false 153.00 1225.6161 D 4354.00 D Common Stock 2026-07-15 4 S false 40.00 1226.9825 D 4314.00 D Common Stock 2026-07-15 4 S false 210.00 1227.8195 D 4104.00 D Common Stock 2026-07-15 4 S false 90.00 1228.79 D 4014.00 D Stock Option 284.97 2026-07-15 4 M false 3900.00 0.00 A 2021-09-30 2027-11-08 Common Stock 3900.00 19700.00 D Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,195.0300 - $1,195.3200. 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 $1,208.9700 - $1,209.4000. 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 $1,210.1300 - $1,210.4500. 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 $1,211.1600 - $1,211.9300. 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 $1,212.2400 - $1,213.0100. 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 $1,213.2600 - $1,214.1500. 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 $1,214.6500 - $1,215.6200 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 $1,215.6600 - $1,216.6400. 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 $1,216.7200 - $1,217.6700. 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 $1,217.8300 - $1,218.6200. 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 $1,218.9300 - $1,219.6900. 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 $1,197.5000 - $1,198.4400. 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 $1,220.0600 - $1,221.0400. 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. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,221.0900 - $1,222.0600. 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 $1,222.1300 - $1,223.1200. 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 $1,223.1500 - $1,224.1200. 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 $1,224.1600 - $1,225.1300. 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 $1,225.2200 - $1,226.1000. 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 $1,226.4000- $1,227.3200. 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 $1,227.5200- $1,228.4600. 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 $1,228.5700 - $1,229.4400. 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 $1,198.6500 - $1,199.4500. 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 $1,199.8400 - $1,200.5700. 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 $1,200.8800 - $1,2201.7100. 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 $1,202.0100 - $1,202.9200. 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 $1,203.0500 - $1,204.0300. 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 $1,206.4600 - $1,207.0900. 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 $1,207.9200 - $1,208.9000. 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. Due to the 30-line item limitation in Table 1, this is the first of two Form 4s filed by the reporting person for this transaction. /s/ Rachel L. Quinlan as attorney in fact for Joel Reiss 2026-07-17