ROBERT SMALL - 12 Sep 2025 Form 4 Insider Report for TransDigm Group INC (TDG)

Role
Director
Signature
/s/ Robert J. Small
Issuer symbol
TDG
Transactions as of
12 Sep 2025
Transactions value $
-$6,384,923
Form type
4
Filing time
16 Sep 2025, 18:17:24 UTC
Previous filing
04 Sep 2025
Next filing
22 Sep 2025

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
SMALL ROBERT J Director C/O BERKSHIRE PARTNERS LLC, 200 CLARENDON STREET, 35TH FLOOR, BOSTON /s/ Robert J. Small 16 Sep 2025 0001234544

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction TDG Common Stock Sale -$512K -403 -0.46% $1,271.39 88K 12 Sep 2025 By Stockbridge Partners LLC F2, F4
transaction TDG Common Stock Sale -$326K -256 -0.29% $1,272.45 87.8K 12 Sep 2025 By Stockbridge Partners LLC F2, F5
transaction TDG Common Stock Sale -$332K -261 -0.3% $1,273.55 87.5K 12 Sep 2025 By Stockbridge Partners LLC F2, F6
transaction TDG Common Stock Sale -$622K -488 -0.56% $1,274.22 87K 12 Sep 2025 By Stockbridge Partners LLC F2, F7
transaction TDG Common Stock Sale -$761K -597 -0.69% $1,275.23 86.4K 12 Sep 2025 By Stockbridge Partners LLC F2, F8
transaction TDG Common Stock Sale -$643K -504 -0.58% $1,276.41 85.9K 12 Sep 2025 By Stockbridge Partners LLC F2, F9
transaction TDG Common Stock Sale -$665K -521 -0.61% $1,277.16 85.4K 12 Sep 2025 By Stockbridge Partners LLC F2, F10
transaction TDG Common Stock Sale -$383K -300 -0.35% $1,278.32 85.1K 12 Sep 2025 By Stockbridge Partners LLC F2, F11
transaction TDG Common Stock Sale -$641K -501 -0.59% $1,279.19 84.6K 12 Sep 2025 By Stockbridge Partners LLC F2, F12
transaction TDG Common Stock Sale -$368K -287 -0.34% $1,280.54 84.3K 12 Sep 2025 By Stockbridge Partners LLC F2, F13
transaction TDG Common Stock Sale -$666K -520 -0.62% $1,281.22 83.8K 12 Sep 2025 By Stockbridge Partners LLC F2, F14
transaction TDG Common Stock Sale -$191K -149 -0.18% $1,282.64 83.6K 12 Sep 2025 By Stockbridge Partners LLC F2, F15
transaction TDG Common Stock Sale -$253K -197 -0.24% $1,283.19 83.4K 12 Sep 2025 By Stockbridge Partners LLC F2, F16
transaction TDG Common Stock Sale -$20.5K -16 -0.02% $1,284.17 83.4K 12 Sep 2025 By Stockbridge Partners LLC F2, F17
transaction TDG Common Stock Gift $0 -10K -64.18% $0.00 5.58K 15 Sep 2025 Direct F18
holding TDG Common Stock 442K 12 Sep 2025 By Stockbridge Fund, L.P. F1
holding TDG Common Stock 60.2K 12 Sep 2025 By Family Trusts F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 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.
F2 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.
F3 Represents shares of Common Stock beneficially owned by certain family trusts. The Reporting Person's immediate family members are beneficiaries of such family trusts.
F4 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1270.8479 to $1271.8478. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F5 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1271.8479 to $1272.8478. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F6 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1272.8479 to $1273.8478. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F7 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1273.8479 to $1274.8478. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F8 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1274.8479 to $1275.8478. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F9 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1275.8479 to $1276.8478. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F10 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1276.8479 to $1277.8478. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F11 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1277.8479 to $1278.8478. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F12 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1278.8479 to $1279.8478. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F13 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1279.8479 to $1280.8478. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F14 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1280.8479 to $1281.8478. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F15 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1281.8479 to $1282.8478. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F16 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1282.8479 to $1283.8478. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F17 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1283.8479 to $1284.3525. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F18 Represents shares of Common Stock that were disposed of by the Reporting Person pursuant to a gift to a donor advised fund for no consideration.