144 0001656109 XXXXXXXX LIVE 0001260221 TransDigm Group Incorporated 001-32833 1350 Euclid Avenue, Suite 1600 Cleveland OH 44115 2167062960 JOEL REISS Officer Common Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 8th Floor New York NY 10004

8000 8889760.00 55276525 09/15/2026 NYSE Common 09/15/2026 Exercise of Stock Options Issuer N 8000 09/15/2026 Cash N 10b5-1 Sales for JOEL B REISS

1350 Euclid Avenue, Suite 1600 Cleveland OH 44115

Common 08/17/2026 3900 4831152.30 10b5-1 Sales for JOEL B REISS

1350 Euclid Avenue, Suite 1600 Cleveland OH 44115

Common 07/15/2026 3900 4749372.42 The securities to be sold were and will be received upon the exercise of stock options over the next three months. The dates of acquisition and payment were and will be the dates of exercise/sale. 09/15/2026 08/12/2025 /s/ Joel Reiss