TransDigm (TDG)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-09-18 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: TransDigm Group INC (TDG) CIK: 0001260221 --- Reporting Owner --- Name: Graff Michael CIK: 0001299926 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-09-18 | Code: A (Grant or award) Shares: +34 | Price: $1,085.00 Total Value: $36,890.00 Shares Owned After: 1,717 | Ownership: D (Direct) Footnotes: [F1] Receipt of stock in lieu of payment of semi-annual director fee, based on fair market value in accordance with the Director Share Plan. --- Holdings --- [Holding #1] Security: Common Stock Ownership: I (Indirect) Footnotes: [F2] The shares reported in Column Five are held by The 2012 Carol Ostrow GST Trust created by the reporting person's spouse for the benefit of their children (the "Spouse Trust"). [Holding #2] Security: Common Stock Ownership: I (Indirect) Footnotes: [F3] These shares are held by certain trusts created for the benefit of the reporting person's children and for which the reporting person is trustee. --- Footnotes (Complete Index) --- F1: Receipt of stock in lieu of payment of semi-annual director fee, based on fair market value in accordance with the Director Share Plan. F2: The shares reported in Column Five are held by The 2012 Carol Ostrow GST Trust created by the reporting person's spouse for the benefit of their children (the "Spouse Trust"). F3: These shares are held by certain trusts created for the benefit of the reporting person's children and for which the reporting person is trustee. --- Signature --- /s/ /s/ Rachel L. Quinlan as attorney in fact for Michael Graff (2026-09-21)