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SMALL ROBERT J

Disclosed activity across 1 company

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64244
SEC CIK
0001234544

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
TransDigm Group INCTDG · Entity 2991DirectorSeptember 18, 2026September 23, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

TransDigm Group INC

Report date September 18, 2026 · Filed September 23, 2026 · Amendment

Amendment: balances below belong to this corrected disclosure, not necessarily a complete replacement of earlier positions.

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect5,677 Reported balance After 2026-09-18 transaction · row 1 Amendment: may correct only part of an earlier disclosure.
1 source row

Row 1 · 2026-09-18 · Other · Acquired 0 · Balance 5,677

Common StockSEC Table I · non-derivativeIndirectBy Family Trusts60,246 Reported balance Holding disclosure · report date 2026-09-18 · row 2 Amendment: may correct only part of an earlier disclosure.
1 source row

Row 2 · Balance 60,246

Common StockSEC Table I · non-derivativeIndirectBy Stockbridge Fund, L.P.366,142 Reported balance Holding disclosure · report date 2026-09-18 · row 3 Amendment: may correct only part of an earlier disclosure.
1 source row

Row 3 · Balance 366,142

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.

Common StockSEC Table I · non-derivativeIndirectBy Stockbridge Partners LLC68,139 Reported balance Holding disclosure · report date 2026-09-18 · row 4 Amendment: may correct only part of an earlier disclosure.
1 source row

Row 4 · Balance 68,139

Filing footnotes · ownership attribution and instrument terms

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.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
September 18, 2026 Filed Sep 23, 2026 00:24 UTC Amendment TransDigm Group INC TDG · Entity 2991 OtherCommon Stock 0 $0.00 $0.00
Disclosure

SEC source: 0001234544-26-000002 · primarydocument.xml · nonDerivative · entry 1

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,677

Read SEC document
September 18, 2026 Filed Sep 21, 2026 20:49 UTC TransDigm Group INC TDG · Entity 2991 GrantCommon Stock 52 $1,085.00 $56,420.00
Disclosure

SEC source: 0001234544-26-000001 · primarydocument.xml · nonDerivative · entry 1

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,677

F1 · shares: Receipt of stock in lieu of payment of semi-annual director fee, based on fair market value in accordance with the Director Share Plan.

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February 25, 2026 Filed Feb 27, 2026 21:22 UTC TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 1 $1,285.00 $1,285.00
Disclosure

SEC source: 0000919574-26-001436 · ownership.xml · nonDerivative · entry 1

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Fund, L.P.

Disclosed balance after: 366,142

F1 · shares: 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.

F2 · ownership.nature: 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.

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December 10, 2025 Filed Dec 11, 2025 21:13 UTC TransDigm Group INC TDG · Entity 2991 Exercise / conversionStock Option · Derivative 4,700 $0.00 Strike: $66.47 $0.00
Disclosure

SEC source: 0001193125-25-315957 · ownership.xml · derivative · entry 8

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 4,700 shares

Expires 2027-11-08

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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December 10, 2025 Filed Dec 11, 2025 21:13 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 74 $1,291.03 $95,536.38
Disclosure

SEC source: 0001193125-25-315957 · ownership.xml · nonDerivative · entry 4

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,625

F4 · price: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1291.0300 - $1,291.0400. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.

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December 10, 2025 Filed Dec 11, 2025 21:13 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 4,046 $1,290.30 $5,220,537.21
Disclosure

SEC source: 0001193125-25-315957 · ownership.xml · nonDerivative · entry 3

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,699

F3 · price: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1290.0300 - $1,290.5200. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.

Read SEC document
December 10, 2025 Filed Dec 11, 2025 21:13 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 580 $1,289.32 $747,805.43
Disclosure

SEC source: 0001193125-25-315957 · ownership.xml · nonDerivative · entry 2

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,745

F2 · price: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1288.9000 - $1,289.5600. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.

Read SEC document
December 10, 2025 Filed Dec 11, 2025 21:13 UTC TransDigm Group INC TDG · Entity 2991 Exercise / conversionCommon Stock 4,700 $66.47 $312,409.00
Disclosure

SEC source: 0001193125-25-315957 · ownership.xml · nonDerivative · entry 1

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,325

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: The exercise price has been adjusted for dividends declared since August 1, 2022.

Read SEC document
December 09, 2025 Filed Dec 10, 2025 02:09 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 15,280 $1,335.72 $20,409,801.60
Disclosure

SEC source: 0000919574-25-007305 · ownership.xml · nonDerivative · entry 2

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 68,139

F2 · ownership.nature: 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.

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December 09, 2025 Filed Dec 10, 2025 02:09 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 75,673 $1,335.72 $101,077,939.56
Disclosure

SEC source: 0000919574-25-007305 · ownership.xml · nonDerivative · entry 1

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Fund, L.P.

Disclosed balance after: 366,141

F1 · ownership.nature: 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.

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November 04, 2025 Filed Nov 6, 2025 22:23 UTC TransDigm Group INC TDG · Entity 2991 GrantStock Option · Derivative 518 $0.00 Strike: $1,291.97 $0.00
Disclosure

SEC source: 0001193125-25-270140 · ownership.xml · derivative · entry 1

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 518

Underlying: Common Stock · 518 shares

Expires 2035-11-04

F1 · derivative.exercise_date: These options are exercisable at 20% per year over five years beginning September 30, 2026 subject to the achievement of annual operating performance targets in each year.

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September 19, 2025 Filed Sep 22, 2025 21:00 UTC TransDigm Group INC TDG · Entity 2991 GrantCommon Stock 44 $1,288.13 $56,677.72
Disclosure

SEC source: 0001193125-25-211494 · ownership.xml · nonDerivative · entry 1

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,625

F1 · shares: Receipt of stock in lieu of payment of semi-annual director fee, based on fair market value in accordance with the Director Share Plan.

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September 15, 2025 Filed Sep 16, 2025 22:17 UTC TransDigm Group INC TDG · Entity 2991 GiftCommon Stock 10,000 $0.00 $0.00
Disclosure

SEC source: 0000919574-25-005699 · ownership.xml · nonDerivative · entry 17

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,581

F18 · price: 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.

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September 12, 2025 Filed Sep 16, 2025 22:17 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 16 $1,284.17 $20,546.77
Disclosure

SEC source: 0000919574-25-005699 · ownership.xml · nonDerivative · entry 15

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 83,419

F17 · price: 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.

F2 · ownership.nature: 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.

Read SEC document
September 12, 2025 Filed Sep 16, 2025 22:17 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 197 $1,283.19 $252,787.82
Disclosure

SEC source: 0000919574-25-005699 · ownership.xml · nonDerivative · entry 14

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 83,435

F16 · price: 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.

F2 · ownership.nature: 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.

Read SEC document
September 12, 2025 Filed Sep 16, 2025 22:17 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 149 $1,282.64 $191,112.81
Disclosure

SEC source: 0000919574-25-005699 · ownership.xml · nonDerivative · entry 13

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 83,632

F15 · price: 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.

F2 · ownership.nature: 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.

Read SEC document
September 12, 2025 Filed Sep 16, 2025 22:17 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 520 $1,281.22 $666,234.61
Disclosure

SEC source: 0000919574-25-005699 · ownership.xml · nonDerivative · entry 12

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 83,781

F14 · price: 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.

F2 · ownership.nature: 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.

Read SEC document
September 12, 2025 Filed Sep 16, 2025 22:17 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 287 $1,280.54 $367,515.41
Disclosure

SEC source: 0000919574-25-005699 · ownership.xml · nonDerivative · entry 11

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 84,301

F13 · price: 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.

F2 · ownership.nature: 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.

Read SEC document
September 12, 2025 Filed Sep 16, 2025 22:17 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 501 $1,279.19 $640,872.74
Disclosure

SEC source: 0000919574-25-005699 · ownership.xml · nonDerivative · entry 10

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 84,588

F12 · price: 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.

F2 · ownership.nature: 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.

Read SEC document
September 12, 2025 Filed Sep 16, 2025 22:17 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 300 $1,278.32 $383,497.08
Disclosure

SEC source: 0000919574-25-005699 · ownership.xml · nonDerivative · entry 9

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 85,089

F11 · price: 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.

F2 · ownership.nature: 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.

Read SEC document
September 12, 2025 Filed Sep 16, 2025 22:17 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 521 $1,277.16 $665,402.44
Disclosure

SEC source: 0000919574-25-005699 · ownership.xml · nonDerivative · entry 8

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 85,389

F10 · price: 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.

F2 · ownership.nature: 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.

Read SEC document
September 12, 2025 Filed Sep 16, 2025 22:17 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 504 $1,276.41 $643,309.78
Disclosure

SEC source: 0000919574-25-005699 · ownership.xml · nonDerivative · entry 7

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 85,910

F9 · price: 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.

F2 · ownership.nature: 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.

Read SEC document
September 12, 2025 Filed Sep 16, 2025 22:17 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 597 $1,275.23 $761,312.73
Disclosure

SEC source: 0000919574-25-005699 · ownership.xml · nonDerivative · entry 6

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 86,414

F8 · price: 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.

F2 · ownership.nature: 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.

Read SEC document
September 12, 2025 Filed Sep 16, 2025 22:17 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 488 $1,274.22 $621,817.41
Disclosure

SEC source: 0000919574-25-005699 · ownership.xml · nonDerivative · entry 5

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 87,011

F7 · price: 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.

F2 · ownership.nature: 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.

Read SEC document
September 12, 2025 Filed Sep 16, 2025 22:17 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 261 $1,273.55 $332,396.55
Disclosure

SEC source: 0000919574-25-005699 · ownership.xml · nonDerivative · entry 4

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 87,499

F6 · price: 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.

F2 · ownership.nature: 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.

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September 12, 2025 Filed Sep 16, 2025 22:17 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 256 $1,272.45 $325,747.28
Disclosure

SEC source: 0000919574-25-005699 · ownership.xml · nonDerivative · entry 3

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 87,760

F5 · price: 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.

F2 · ownership.nature: 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.

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September 12, 2025 Filed Sep 16, 2025 22:17 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 403 $1,271.39 $512,370.01
Disclosure

SEC source: 0000919574-25-005699 · ownership.xml · nonDerivative · entry 2

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 88,016

F4 · price: 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.

F2 · ownership.nature: 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.

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September 02, 2025 Filed Sep 4, 2025 20:39 UTC TransDigm Group INC TDG · Entity 2991 OtherCommon Stock 2,318 $0.00 $0.00
Disclosure

SEC source: 0000919574-25-005548 · ownership.xml · nonDerivative · entry 1

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Fund, L.P.

Disclosed balance after: 441,814

F1 · kind: Represents Common Stock of the Issuer distributed by Stockbridge Fund, L.P. to certain of its limited partners and members. The Reporting Person disclaims beneficial ownership in the reported securities except to the extent of his pecuniary interest, if any, therein.

F2 · ownership.nature: 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.

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June 10, 2025 Filed Jun 13, 2025 00:49 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 40,500 $1,425.01 $57,712,905.00
Disclosure

SEC source: 0000919574-25-003573 · ownership.xml · nonDerivative · entry 2

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Fund, L.P.

Disclosed balance after: 444,132

F2 · ownership.nature: 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.

Read SEC document
June 10, 2025 Filed Jun 13, 2025 00:49 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 5,200 $1,425.01 $7,410,052.00
Disclosure

SEC source: 0000919574-25-003573 · ownership.xml · nonDerivative · entry 1

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 88,419

F1 · ownership.nature: 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.

Read SEC document
March 26, 2025 Filed Mar 26, 2025 21:37 UTC TransDigm Group INC TDG · Entity 2991 GrantCommon Stock 42 $1,346.50 $56,553.00
Disclosure

SEC source: 0000950170-25-045482 · ownership.xml · nonDerivative · entry 1

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,581

F1 · shares: Receipt of stock in lieu of payment of semi-annual director fee, based on fair market value in accordance with the Director Share Plan.

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March 14, 2025 Filed Mar 17, 2025 21:24 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 3,352 $1,345.24 $4,509,253.87
Disclosure

SEC source: 0000919574-25-001987 · ownership.xml · nonDerivative · entry 8

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Fund, L.P.

Disclosed balance after: 484,632

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1344.95 to $1345.665. 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.

F2 · ownership.nature: 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.

Read SEC document
March 14, 2025 Filed Mar 17, 2025 21:24 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 682 $1,345.24 $917,455.59
Disclosure

SEC source: 0000919574-25-001987 · ownership.xml · nonDerivative · entry 7

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 93,619

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1344.95 to $1345.665. 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.

F1 · ownership.nature: 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.

Read SEC document
March 14, 2025 Filed Mar 17, 2025 21:24 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 1,412 $1,340.85 $1,893,280.20
Disclosure

SEC source: 0000919574-25-001987 · ownership.xml · nonDerivative · entry 6

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Fund, L.P.

Disclosed balance after: 487,984

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1339.95 to $1340.9499. 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.

F2 · ownership.nature: 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.

Read SEC document
March 14, 2025 Filed Mar 17, 2025 21:24 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 288 $1,340.85 $386,164.80
Disclosure

SEC source: 0000919574-25-001987 · ownership.xml · nonDerivative · entry 5

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 94,301

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1339.95 to $1340.9499. 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.

F1 · ownership.nature: 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.

Read SEC document
March 14, 2025 Filed Mar 17, 2025 21:24 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 2,742 $1,336.23 $3,663,947.32
Disclosure

SEC source: 0000919574-25-001987 · ownership.xml · nonDerivative · entry 4

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Fund, L.P.

Disclosed balance after: 489,396

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1335.95 to $1336.9499. 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.

F2 · ownership.nature: 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.

Read SEC document
March 14, 2025 Filed Mar 17, 2025 21:24 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 558 $1,336.23 $745,617.29
Disclosure

SEC source: 0000919574-25-001987 · ownership.xml · nonDerivative · entry 3

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 94,589

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1335.95 to $1336.9499. 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.

F1 · ownership.nature: 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.

Read SEC document
March 13, 2025 Filed Mar 17, 2025 21:24 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 791 $1,335.22 $1,056,158.15
Disclosure

SEC source: 0000919574-25-001987 · ownership.xml · nonDerivative · entry 2

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Fund, L.P.

Disclosed balance after: 492,138

F2 · ownership.nature: 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.

Read SEC document
March 13, 2025 Filed Mar 17, 2025 21:24 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 209 $1,335.22 $279,060.75
Disclosure

SEC source: 0000919574-25-001987 · ownership.xml · nonDerivative · entry 1

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 95,147

F1 · ownership.nature: 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.

Read SEC document
March 10, 2025 Filed Mar 11, 2025 01:40 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 1,847 $1,349.21 $2,491,990.87
Disclosure

SEC source: 0000919574-25-001879 · ownership.xml · nonDerivative · entry 12

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Fund, L.P.

Disclosed balance after: 492,929

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1348.4045 to $1349.21. 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.

F2 · ownership.nature: 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.

Read SEC document
March 10, 2025 Filed Mar 11, 2025 01:40 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 153 $1,349.21 $206,429.13
Disclosure

SEC source: 0000919574-25-001879 · ownership.xml · nonDerivative · entry 11

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 95,356

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1348.4045 to $1349.21. 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.

F1 · ownership.nature: 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.

Read SEC document
March 10, 2025 Filed Mar 11, 2025 01:40 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 2,309 $1,345.11 $3,105,866.38
Disclosure

SEC source: 0000919574-25-001879 · ownership.xml · nonDerivative · entry 10

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Fund, L.P.

Disclosed balance after: 494,776

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1344.4045 to $1345.4044. 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.

F2 · ownership.nature: 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.

Read SEC document
March 10, 2025 Filed Mar 11, 2025 01:40 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 191 $1,345.11 $256,916.62
Disclosure

SEC source: 0000919574-25-001879 · ownership.xml · nonDerivative · entry 9

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 95,509

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1344.4045 to $1345.4044. 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.

F1 · ownership.nature: 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.

Read SEC document
March 10, 2025 Filed Mar 11, 2025 01:40 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 1,847 $1,343.89 $2,482,164.83
Disclosure

SEC source: 0000919574-25-001879 · ownership.xml · nonDerivative · entry 8

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Fund, L.P.

Disclosed balance after: 497,085

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1343.4045 to $1344.4044. 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.

F2 · ownership.nature: 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.

Read SEC document
March 10, 2025 Filed Mar 11, 2025 01:40 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 153 $1,343.89 $205,615.17
Disclosure

SEC source: 0000919574-25-001879 · ownership.xml · nonDerivative · entry 7

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 95,700

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1343.4045 to $1344.4044. 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.

F1 · ownership.nature: 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.

Read SEC document
March 10, 2025 Filed Mar 11, 2025 01:40 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 2,771 $1,342.95 $3,721,314.45
Disclosure

SEC source: 0000919574-25-001879 · ownership.xml · nonDerivative · entry 6

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Fund, L.P.

Disclosed balance after: 498,932

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1342.4045 to $1343.4044. 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.

F2 · ownership.nature: 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.

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March 10, 2025 Filed Mar 11, 2025 01:40 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 229 $1,342.95 $307,535.55
Disclosure

SEC source: 0000919574-25-001879 · ownership.xml · nonDerivative · entry 5

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 95,853

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1342.4045 to $1343.4044. 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.

F1 · ownership.nature: 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.

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March 10, 2025 Filed Mar 11, 2025 01:40 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 2,309 $1,336.47 $3,085,907.84
Disclosure

SEC source: 0000919574-25-001879 · ownership.xml · nonDerivative · entry 4

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Fund, L.P.

Disclosed balance after: 501,703

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1336.4045 to $1337.4044. 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.

F2 · ownership.nature: 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.

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March 10, 2025 Filed Mar 11, 2025 01:40 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 191 $1,336.47 $255,265.66
Disclosure

SEC source: 0000919574-25-001879 · ownership.xml · nonDerivative · entry 3

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 96,082

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1336.4045 to $1337.4044. 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.

F1 · ownership.nature: 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.

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March 10, 2025 Filed Mar 11, 2025 01:40 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 7,389 $1,335.62 $9,868,859.24
Disclosure

SEC source: 0000919574-25-001879 · ownership.xml · nonDerivative · entry 2

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stockbridge Fund, L.P.

Disclosed balance after: 504,012

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $1335.4045 to $1336.4044. 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.

F2 · ownership.nature: 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.

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Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.