TransDigm Group INC (TDG) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-07-15 10b5-1 Pre-arranged Plan: Yes --- Issuer --- Name: TransDigm Group INC (TDG) CIK: 0001260221 --- Reporting Owner --- Name: Reiss Joel CIK: 0001656109 Role: Officer (Co-Chief Operating Officer) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-07-15 | Code: S (Open market sale) Shares: -190 | Price: $1,230.06 Total Value: $233,710.70 Shares Owned After: 3,824 | Ownership: D (Direct) Footnotes: [F1] Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,229.6600 - $1,230.5400. 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. [Transaction #2] Security: Common Stock Date: 2026-07-15 | Code: S (Open market sale) Shares: -70 | Price: $1,231.09 Total Value: $86,176.60 Shares Owned After: 3,754 | Ownership: D (Direct) Footnotes: [F2] Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,230.8800 - $1,231.4800. 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. [Transaction #3] Security: Common Stock Date: 2026-07-15 | Code: S (Open market sale) Shares: -144 | Price: $1,232.34 Total Value: $177,456.51 Shares Owned After: 3,610 | Ownership: D (Direct) Footnotes: [F3] Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,231.9900 - $1,232.8300. 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. [Transaction #4] Security: Common Stock Date: 2026-07-15 | Code: S (Open market sale) Shares: -10 | Price: $1,233.38 Total Value: $12,333.80 Shares Owned After: 3,600 | Ownership: D (Direct) --- Footnotes (Complete Index) --- F1: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,229.6600 - $1,230.5400. 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. F2: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,230.8800 - $1,231.4800. 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. F3: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,231.9900 - $1,232.8300. 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. --- Signature --- /s/ /s/ Rachel L. Quinlan as attorney in fact for Joel Reiss (2026-07-17)