STOCK TITAN

[Form 4] TransDigm Group INC Insider Trading Activity

Filing Impact
(High)
Filing Sentiment
(Very Negative)
Form Type
4

Robert J. Small, a director of TransDigm Group Inc. (TDG), reported multiple transactions in the company’s common stock on Form 4. The filing shows indirect holdings of 441,814 shares by Stockbridge Fund, L.P. and 60,246 shares held by family trusts. On 09/12/2025 several sales by Stockbridge Partners LLC are reported at weighted-average prices ranging approximately from $1,270.85 to $1,284.35 across multiple blocks. The filing also discloses a 09/15/2025 gift of 10,000 shares to a donor-advised fund (reported as $0 consideration). The reporting person disclaims direct beneficial ownership of the shares held by the entities named.

Robert J. Small, un amministratore di TransDigm Group Inc. (TDG), ha segnalato diverse operazioni con le azioni ordinarie della società nel Form 4. La filing mostra partecipazioni indirette di 441.814 azioni da Stockbridge Fund, L.P. e 60.246 azioni detenute da trust familiari. Il 09/12/2025 riporta diverse vendite da Stockbridge Partners LLC, registrate a prezzi medi ponderati che oscillano approssimativamente tra $1,270.85 e $1,284.35 in vari blocchi. La filing rivela inoltre un regalo del 15/09/2025 di 10.000 azioni a un fondo orientato a donazioni (riportato come controvalore $0). La persona che segnala dichiara di non detenere una proprietà diretta delle azioni detenute dagli enti indicati.

Robert J. Small, un director de TransDigm Group Inc. (TDG), reportó varias operaciones con las acciones comunes de la compañía en el Formulario 4. La presentación muestra participaciones indirectas de 441,814 acciones por Stockbridge Fund, L.P. y 60,246 acciones en fideicomisos familiares. El 09/12/2025 incluye varias ventas por Stockbridge Partners LLC registradas a precios promedio ponderados que oscilan aproximadamente entre $1,270.85 y $1,284.35 en varios bloques. La presentación también divulga un regalo del 15/09/2025 de 10,000 acciones a un fondo asesorado por donantes (con un valor reportado de $0). La persona reportante declina la propiedad beneficiosa directa de las acciones poseídas por las entidades mencionadas.

Robert J. Small은 TransDigm Group Inc. (TDG)의 이사로 Form 4에서 회사의 보통주에 대한 다수의 거래를 보고했습니다. 보고서에는 Stockbridge Fund, L.P.에 의해 간접 소유된 441,814주와 가족 신탁이 보유한 60,246주가 표시됩니다. 2025-09-12에는 Stockbridge Partners LLC의 여러 매도가 가중 평균 가격으로 대략 $1,270.85에서 $1,284.35 사이 범위의 여러 블록으로 보고됩니다. 보고서에는 또한 2025-09-15에 기부된 10,000주가 기부자 자문 펀드로 전달된 사실이 $0의 고려로 기록되어 있습니다. 보고 주체는 명시된 법인들이 보유한 주식에 대한 직접적 유익 소유를 부인합니다.

Robert J. Small, administrateur de TransDigm Group Inc. (TDG), a déclaré plusieurs transactions sur les actions ordinaires de la société via le Formulaire 4. Le dossier indique des participations indirectes de 441 814 actions par Stockbridge Fund, L.P. et 60 246 actions détenues par des fiducies familiales. Le 09/12/2025 rapporte plusieurs ventes effectuées par Stockbridge Partners LLC à des prix moyens pondérés compris approximativement entre $1 270,85 et $1 284,35 sur plusieurs blocs. Le dossier divulge également un don du 15/09/2025 de 10 000 actions à un fonds de donateurs conseillé (retourné comme contrepartie de $0). La personne déclarante renonce à la propriété bénéficiaire directe des actions détenues par les entités nommées.

Robert J. Small, ein Direktor der TransDigm Group Inc. (TDG), meldete mehrere Transaktionen mit den Stammaktien des Unternehmens im Formular 4. Die Einreichung zeigt indirekte Beteiligungen von 441.814 Aktien durch Stockbridge Fund, L.P. und 60.246 Aktien, die von Familienstiftungen gehalten werden. Am 09/12/2025 werden mehrere Verkäufe durch Stockbridge Partners LLC zu gewichteten Durchschnittspreisen gemeldet, die sich grob zwischen $1.270,85 und $1.284,35 über mehrere Blöcke verteilen. Die Einreichung weist zudem eine Schenkung von 10.000 Aktien an einen Donor-Advised Fund am 15/09/2025 aus (berichtet als Gegenleistung $0). Die meldende Person bestreitet eine direkte wirtschaftliche Eigentümerschaft der Aktien, die von den genannten Einheiten gehalten werden.

أُعلن روبرت ج. سمال، مدير في TransDigm Group Inc. (TDG)، عن عدة معاملات في أسهم الشركة العادية ضمن النموذج 4. تُظهر الإيداع حيازات غير مباشرة لـ 441,814 سهمًا من صندوق Stockbridge Fund, L.P. و 60,246 سهمًا مملوكة بواسطة صناديق عائلية. في 12/09/2025 تم الإبلاغ عن عدة عمليات بيع من قبل Stockbridge Partners LLC بأسعار متوسطة وزنًا تتراوح تقريبًا بين $1,270.85 و $1,284.35 عبر عدة كتل. كما يكشف الإيداع عن هدية في 15/09/2025 لـ 10,000 سهم إلى صندوق مُوَجَّه بالتبرعات (مع اعتبار $0). يفيد المبلغ المعلن بأن الشخص المبلغ لا يقر بملكية فعليّة مباشرة للأسهم التي تملكها الكيانات المذكورة.

Robert J. Small,TransDigm Group Inc.(TDG)的董事,在表格4中报告了多笔该公司普通股交易。申报显示 Stockbridge Fund, L.P. 间接持有 441,814 股,以及家族信托持有的 60,246 股。2025/09/12 该日有 Stockbridge Partners LLC 的多笔出售,按加权平均价格大致在 $1,270.85$1,284.35 之间,分多笔成交。申报还披露在 2025/09/1510,000 股捐赠给一个受捐助基金(记为$0对价)。申报人否认对上述实体所持股票的直接受益所有权。

Positive
  • Full disclosure of multiple sales with weighted-average price ranges is provided, improving transparency
  • Entity-level ownership and managerial roles are clearly explained in footnotes
  • Charitable gift of 10,000 shares to a donor-advised fund is explicitly reported
Negative
  • Multiple sizable sales reported on 09/12/2025 by Stockbridge Partners LLC, which may be viewed unfavorably by some investors
  • Reporting person disclaims direct beneficial ownership, making it harder to interpret personal economic exposure from this filing

Insights

TL;DR: Director filed multiple indirect sales at high single-share prices and reported entity-level holdings plus a gift of 10,000 shares.

The Form 4 documents a series of block sales executed on 09/12/2025 by Stockbridge Partners LLC at weighted-average prices in a tight band from about $1,270.85 to $1,284.35, reported across many individual transactions. The filing clarifies that the shares are held indirectly by investment entities (Stockbridge Fund, L.P. and Stockbridge Partners LLC) and that the reporting person disclaims direct beneficial ownership except for any pecuniary interest. A separate 09/15/2025 disposition shows a gift of 10,000 shares to a donor-advised fund. For investors, the material facts are transaction dates, price ranges, and the entity-level ownership disclosures.

TL;DR: Form 4 shows routine section 16 disclosure of indirect holdings and multiple block sales plus a charitable gift, with standard disclaimers.

The filing contains detailed explanatory footnotes describing the ownership chain and the reporting person’s managerial roles in the entities that hold the shares. The presentation follows typical Section 16 reporting conventions: multiple sales reported with weighted-average prices and an explicit disclaimer of beneficial ownership except for pecuniary interest. The documented gift to a donor-advised fund is reported as a $0 disposition, consistent with charitable transfer disclosure requirements. No derivative positions are reported on this form.

Robert J. Small, un amministratore di TransDigm Group Inc. (TDG), ha segnalato diverse operazioni con le azioni ordinarie della società nel Form 4. La filing mostra partecipazioni indirette di 441.814 azioni da Stockbridge Fund, L.P. e 60.246 azioni detenute da trust familiari. Il 09/12/2025 riporta diverse vendite da Stockbridge Partners LLC, registrate a prezzi medi ponderati che oscillano approssimativamente tra $1,270.85 e $1,284.35 in vari blocchi. La filing rivela inoltre un regalo del 15/09/2025 di 10.000 azioni a un fondo orientato a donazioni (riportato come controvalore $0). La persona che segnala dichiara di non detenere una proprietà diretta delle azioni detenute dagli enti indicati.

Robert J. Small, un director de TransDigm Group Inc. (TDG), reportó varias operaciones con las acciones comunes de la compañía en el Formulario 4. La presentación muestra participaciones indirectas de 441,814 acciones por Stockbridge Fund, L.P. y 60,246 acciones en fideicomisos familiares. El 09/12/2025 incluye varias ventas por Stockbridge Partners LLC registradas a precios promedio ponderados que oscilan aproximadamente entre $1,270.85 y $1,284.35 en varios bloques. La presentación también divulga un regalo del 15/09/2025 de 10,000 acciones a un fondo asesorado por donantes (con un valor reportado de $0). La persona reportante declina la propiedad beneficiosa directa de las acciones poseídas por las entidades mencionadas.

Robert J. Small은 TransDigm Group Inc. (TDG)의 이사로 Form 4에서 회사의 보통주에 대한 다수의 거래를 보고했습니다. 보고서에는 Stockbridge Fund, L.P.에 의해 간접 소유된 441,814주와 가족 신탁이 보유한 60,246주가 표시됩니다. 2025-09-12에는 Stockbridge Partners LLC의 여러 매도가 가중 평균 가격으로 대략 $1,270.85에서 $1,284.35 사이 범위의 여러 블록으로 보고됩니다. 보고서에는 또한 2025-09-15에 기부된 10,000주가 기부자 자문 펀드로 전달된 사실이 $0의 고려로 기록되어 있습니다. 보고 주체는 명시된 법인들이 보유한 주식에 대한 직접적 유익 소유를 부인합니다.

Robert J. Small, administrateur de TransDigm Group Inc. (TDG), a déclaré plusieurs transactions sur les actions ordinaires de la société via le Formulaire 4. Le dossier indique des participations indirectes de 441 814 actions par Stockbridge Fund, L.P. et 60 246 actions détenues par des fiducies familiales. Le 09/12/2025 rapporte plusieurs ventes effectuées par Stockbridge Partners LLC à des prix moyens pondérés compris approximativement entre $1 270,85 et $1 284,35 sur plusieurs blocs. Le dossier divulge également un don du 15/09/2025 de 10 000 actions à un fonds de donateurs conseillé (retourné comme contrepartie de $0). La personne déclarante renonce à la propriété bénéficiaire directe des actions détenues par les entités nommées.

Robert J. Small, ein Direktor der TransDigm Group Inc. (TDG), meldete mehrere Transaktionen mit den Stammaktien des Unternehmens im Formular 4. Die Einreichung zeigt indirekte Beteiligungen von 441.814 Aktien durch Stockbridge Fund, L.P. und 60.246 Aktien, die von Familienstiftungen gehalten werden. Am 09/12/2025 werden mehrere Verkäufe durch Stockbridge Partners LLC zu gewichteten Durchschnittspreisen gemeldet, die sich grob zwischen $1.270,85 und $1.284,35 über mehrere Blöcke verteilen. Die Einreichung weist zudem eine Schenkung von 10.000 Aktien an einen Donor-Advised Fund am 15/09/2025 aus (berichtet als Gegenleistung $0). Die meldende Person bestreitet eine direkte wirtschaftliche Eigentümerschaft der Aktien, die von den genannten Einheiten gehalten werden.

SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number: 3235-0287
Estimated average burden
hours per response: 0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
SMALL ROBERT J

(Last) (First) (Middle)
C/O BERKSHIRE PARTNERS LLC
200 CLARENDON STREET, 35TH FLOOR

(Street)
BOSTON MA 02116

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
TransDigm Group INC [ TDG ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
09/12/2025
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 441,814 I By Stockbridge Fund, L.P.(1)
Common Stock 09/12/2025 S 403 D $1,271.3896(4) 88,016 I By Stockbridge Partners LLC(2)
Common Stock 09/12/2025 S 256 D $1,272.4503(5) 87,760 I By Stockbridge Partners LLC(2)
Common Stock 09/12/2025 S 261 D $1,273.55(6) 87,499 I By Stockbridge Partners LLC(2)
Common Stock 09/12/2025 S 488 D $1,274.216(7) 87,011 I By Stockbridge Partners LLC(2)
Common Stock 09/12/2025 S 597 D $1,275.2307(8) 86,414 I By Stockbridge Partners LLC(2)
Common Stock 09/12/2025 S 504 D $1,276.4083(9) 85,910 I By Stockbridge Partners LLC(2)
Common Stock 09/12/2025 S 521 D $1,277.164(10) 85,389 I By Stockbridge Partners LLC(2)
Common Stock 09/12/2025 S 300 D $1,278.3236(11) 85,089 I By Stockbridge Partners LLC(2)
Common Stock 09/12/2025 S 501 D $1,279.1871(12) 84,588 I By Stockbridge Partners LLC(2)
Common Stock 09/12/2025 S 287 D $1,280.5415(13) 84,301 I By Stockbridge Partners LLC(2)
Common Stock 09/12/2025 S 520 D $1,281.2204(14) 83,781 I By Stockbridge Partners LLC(2)
Common Stock 09/12/2025 S 149 D $1,282.6363(15) 83,632 I By Stockbridge Partners LLC(2)
Common Stock 09/12/2025 S 197 D $1,283.1869(16) 83,435 I By Stockbridge Partners LLC(2)
Common Stock 09/12/2025 S 16 D $1,284.1729(17) 83,419 I By Stockbridge Partners LLC(2)
Common Stock 60,246 I By Family Trusts(3)
Common Stock 09/15/2025 G 10,000 D $0(18) 5,581 D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Explanation of Responses:
1. 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.
2. 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.
3. Represents shares of Common Stock beneficially owned by certain family trusts. The Reporting Person's immediate family members are beneficiaries of such family trusts.
4. 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.
5. 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.
6. 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.
7. 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.
8. 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.
9. 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.
10. 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.
11. 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.
12. 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.
13. 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.
14. 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.
15. 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.
16. 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.
17. 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.
18. 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.
/s/ Robert J. Small 09/16/2025
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did the Form 4 filed for TDG disclose about insider holdings?

The filing shows indirect holdings of 441,814 shares by Stockbridge Fund, L.P. and 60,246 shares by family trusts, as reported by Robert J. Small.

When were the stock sales reported on the TDG Form 4 executed?

Multiple sales were executed on 09/12/2025, with weighted-average prices reported in a range of approximately $1,270.85 to $1,284.35.

Were any gifts or donations disclosed in the TDG Form 4?

Yes. The filing discloses a 09/15/2025 disposition reporting a 10,000-share gift to a donor-advised fund at $0 consideration.

Does Robert J. Small claim direct beneficial ownership of the reported shares?

No. The filing contains disclaimers stating he disclaims beneficial ownership of the shares held by the named entities except to the extent of any pecuniary interest.

Are there any derivative securities reported in this Form 4 for TDG?

No. Table II (derivative securities) contains no reported positions or transactions in this filing.
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