Robert J. Small - 25 Feb 2026 Form 4 Insider Report for TransDigm Group INC (TDG)

Reporting relationship: Director
Issuer ticker: TDG
Reported as of: 25 Feb 2026
Net transaction value: +$1,285
SEC form: 4
Accepted by SEC: 27 Feb 2026, 16:22:59 UTC
Prior SEC filing: 11 Dec 2025
Source filing: View source filing
Reporting owner signature: /s/ Robert J. Small

Key filing fact

Robert J. Small filed Form 4 for TransDigm Group INC (TDG) on 27 Feb 2026.

Key facts

This page summarizes Robert J. Small's Form 4 filing for TransDigm Group INC (TDG).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 27 Feb 2026, 16:22.

Change

Previous filing in this sequence was filed on 11 Dec 2025.
Current net transaction value: +$1,285.

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 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/ Robert J. Small
Signature date: 27 Feb 2026

Reported non-derivative transactions

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

TDG transaction

Common Stock

Purchase

Transaction value: $1,285
Shares: +1
Change %: +0%
Price: $1285.00
Shares after: 366,142
Date: 25 Feb 2026
Ownership: By Stockbridge Fund, L.P.
Footnotes: F1, F2

TDG holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 68,139
Date: 25 Feb 2026
Ownership: By Stockbridge Partners LLC
Footnotes: F3

TDG holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 60,246
Date: 25 Feb 2026
Ownership: By Family Trusts
Footnotes: F4

TDG holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 5,625
Date: 25 Feb 2026
Ownership: Direct

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

The purchase of the Issuer's common stock reported herein was matchable under Section 16(b) of the Securities Exchange Act of 1934, to the extent of one (1) share, with the sale of one (1) share of the Issuer's common stock at a price of $1,335.72 per share by an entity in which the Reporting Person has a pecuniary interest. The Reporting Person has paid to the Issuer an amount representing the difference between the purchase and sale prices of the two transactions with respect to such one share of the Issuer's common stock.

Footnote F2

Represents shares held by Stockbridge Fund, L.P. ("SF"). Berkshire Partners Holdings LLC ("BPH") is the general partner of BPSP, L.P. ("BPSP"), which is the managing member of SP, the registered investment adviser to SF. Stockbridge Associates LLC ("SA") is the general partner of SF. The Reporting Person is a managing member of each of BPH, BPSP, SP and SA. As such, the Reporting Person may be deemed to share voting and dispositive power with respect to the shares of the Issuer's common stock held by SF. However, the Reporting Person disclaims beneficial ownership of these shares, except to the extent, if any, of his pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purposes.

Footnote F3

Represents shares held by Stockbridge Partners LLC ("SP") on behalf of a managed account over which it has shared voting and sole dispositive power. This Form 4 has been filed because the Reporting Person is a director of the Issuer and a managing member of SP. As such, the Reporting Person may be deemed to share voting and dispositive power with respect to the shares of the Issuer's common stock held by SP. However, the Reporting Person disclaims beneficial ownership of these shares, except to the extent, if any, of his pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purposes.

Footnote F4

Represents shares of Common Stock beneficially owned by certain family trusts. The Reporting Person's immediate family members are beneficiaries of such family trusts.