Robert J. Small - 18 Sep 2026 Form 4/A - Amendment Insider Report for TransDigm Group INC (TDG)

Reporting relationship: Director
Issuer ticker: TDG
Reported as of: 18 Sep 2026
Net transaction value: $0
SEC form: 4/A - Amendment
Accepted by SEC: 22 Sep 2026, 20:24:06 UTC
Original report date: 21 Sep 2026
Prior SEC filing: 27 Feb 2026
Source filing: View source filing
Reporting owner signature: /s/Rachel Quinlan, as attorney in fact for SMALL ROBERT J

Key filing fact

Robert J. Small filed Form 4/A - Amendment for TransDigm Group INC (TDG) on 22 Sep 2026.

Key facts

This page summarizes Robert J. Small's Form 4/A - Amendment filing for TransDigm Group INC (TDG).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 22 Sep 2026, 20:24.

Change

Previous filing in this sequence was filed on 27 Feb 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4/A - Amendment disclosures.

View source filing

Reporting Owners (1)

CIK 0001234544 Primary reporting owner

SMALL ROBERT J

Relationship: Director
Address: C/O BERKSHIRE PARTNERS LLC, 200 CLARENDON STREET, 35TH FLOOR, BOSTON
Signature: /s/Rachel Quinlan, as attorney in fact for SMALL ROBERT J
Signature date: 22 Sep 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

TDG transaction

Common Stock

Other

Transaction value
Shares: 0
Change %: 0%
Price: $0.000000^*
Shares after: 5,677
Date: 18 Sep 2026
Ownership: Direct

TDG holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 60,246
Date: 18 Sep 2026
Ownership: By Family Trusts

TDG holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 366,142
Date: 18 Sep 2026
Ownership: By Stockbridge Fund, L.P.
Footnotes: F1

TDG holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 68,139
Date: 18 Sep 2026
Ownership: By Stockbridge Partners LLC

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

Amended to correct the carry-over balance. The reporting person beneficially owns 366,142 shares held by Stockbridge Fund LP, not 366,141 as previously reported.