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person · Reporting owner

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
February 13, 2023 Filed Feb 14, 2023 01:13 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 493 $737.88 $363,774.84
Disclosure

SEC source: 0000919574-23-001314 · ownership.xml · nonDerivative · entry 15

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 195,893

F11 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $737.5156 to $738.5155. 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
February 13, 2023 Filed Feb 14, 2023 01:13 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 28,648 $737.20 $21,119,305.60
Disclosure

SEC source: 0000919574-23-001314 · ownership.xml · nonDerivative · entry 14

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 1,467,429

F10 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $736.5156 to $737.5155. 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 directly or indirectly by Berkshire Fund IX, L.P. ("IX"), Berkshire Fund IX-A, L.P. ("IX-A"), Berkshire Investors III LLC ("Investors III"), Berkshire Investors IV LLC ("Investors IV") and Stockbridge Fund, L.P. ("SF") (collectively, the "Berkshire Entities"). Berkshire Partners Holdings LLC ("BPH") is the general partner of BPSP, L.P. ("BPSP"), which is the managing member of each of Berkshire Partners LLC, the registered investment adviser to IX, IX-A, Investors III and Investors IV ("BP"), and SP, the registered investment adviser to SF. Ninth Berkshire Associates LLC ("9BA") is the general partner of each of IX and IX-A.

F3 · ownership.nature: [Continued from Footnote 2] Stockbridge Associates LLC ("SA") is the general partner of SF. The Reporting Person is a managing member of each of BPH, BPSP, BP, SP, 9BA, SA, Investors III and Investors IV. 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 the Berkshire Entities. 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
February 13, 2023 Filed Feb 14, 2023 01:13 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 840 $737.20 $619,248.00
Disclosure

SEC source: 0000919574-23-001314 · ownership.xml · nonDerivative · entry 13

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 196,386

F10 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $736.5156 to $737.5155. 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
February 13, 2023 Filed Feb 14, 2023 01:13 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 25,619 $735.28 $18,837,138.32
Disclosure

SEC source: 0000919574-23-001314 · ownership.xml · nonDerivative · entry 12

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 1,496,077

F9 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $734.5156 to $735.5155. 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 directly or indirectly by Berkshire Fund IX, L.P. ("IX"), Berkshire Fund IX-A, L.P. ("IX-A"), Berkshire Investors III LLC ("Investors III"), Berkshire Investors IV LLC ("Investors IV") and Stockbridge Fund, L.P. ("SF") (collectively, the "Berkshire Entities"). Berkshire Partners Holdings LLC ("BPH") is the general partner of BPSP, L.P. ("BPSP"), which is the managing member of each of Berkshire Partners LLC, the registered investment adviser to IX, IX-A, Investors III and Investors IV ("BP"), and SP, the registered investment adviser to SF. Ninth Berkshire Associates LLC ("9BA") is the general partner of each of IX and IX-A.

F3 · ownership.nature: [Continued from Footnote 2] Stockbridge Associates LLC ("SA") is the general partner of SF. The Reporting Person is a managing member of each of BPH, BPSP, BP, SP, 9BA, SA, Investors III and Investors IV. 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 the Berkshire Entities. 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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February 13, 2023 Filed Feb 14, 2023 01:13 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 751 $735.28 $552,195.28
Disclosure

SEC source: 0000919574-23-001314 · ownership.xml · nonDerivative · entry 11

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 197,226

F9 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $734.5156 to $735.5155. 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
February 13, 2023 Filed Feb 14, 2023 01:13 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 13,360 $731.81 $9,776,981.60
Disclosure

SEC source: 0000919574-23-001314 · ownership.xml · nonDerivative · entry 10

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 1,521,696

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $731.5156 to $732.5155. 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 directly or indirectly by Berkshire Fund IX, L.P. ("IX"), Berkshire Fund IX-A, L.P. ("IX-A"), Berkshire Investors III LLC ("Investors III"), Berkshire Investors IV LLC ("Investors IV") and Stockbridge Fund, L.P. ("SF") (collectively, the "Berkshire Entities"). Berkshire Partners Holdings LLC ("BPH") is the general partner of BPSP, L.P. ("BPSP"), which is the managing member of each of Berkshire Partners LLC, the registered investment adviser to IX, IX-A, Investors III and Investors IV ("BP"), and SP, the registered investment adviser to SF. Ninth Berkshire Associates LLC ("9BA") is the general partner of each of IX and IX-A.

F3 · ownership.nature: [Continued from Footnote 2] Stockbridge Associates LLC ("SA") is the general partner of SF. The Reporting Person is a managing member of each of BPH, BPSP, BP, SP, 9BA, SA, Investors III and Investors IV. 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 the Berkshire Entities. 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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February 13, 2023 Filed Feb 14, 2023 01:13 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 392 $731.81 $286,869.52
Disclosure

SEC source: 0000919574-23-001314 · ownership.xml · nonDerivative · entry 9

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 197,977

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $731.5156 to $732.5155. 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
February 13, 2023 Filed Feb 14, 2023 01:13 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 17,369 $729.80 $12,675,896.20
Disclosure

SEC source: 0000919574-23-001314 · ownership.xml · nonDerivative · entry 8

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 1,535,056

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $729.5156 to $730.5155. 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 directly or indirectly by Berkshire Fund IX, L.P. ("IX"), Berkshire Fund IX-A, L.P. ("IX-A"), Berkshire Investors III LLC ("Investors III"), Berkshire Investors IV LLC ("Investors IV") and Stockbridge Fund, L.P. ("SF") (collectively, the "Berkshire Entities"). Berkshire Partners Holdings LLC ("BPH") is the general partner of BPSP, L.P. ("BPSP"), which is the managing member of each of Berkshire Partners LLC, the registered investment adviser to IX, IX-A, Investors III and Investors IV ("BP"), and SP, the registered investment adviser to SF. Ninth Berkshire Associates LLC ("9BA") is the general partner of each of IX and IX-A.

F3 · ownership.nature: [Continued from Footnote 2] Stockbridge Associates LLC ("SA") is the general partner of SF. The Reporting Person is a managing member of each of BPH, BPSP, BP, SP, 9BA, SA, Investors III and Investors IV. 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 the Berkshire Entities. 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
February 13, 2023 Filed Feb 14, 2023 01:13 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 509 $729.80 $371,468.20
Disclosure

SEC source: 0000919574-23-001314 · ownership.xml · nonDerivative · entry 7

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 198,369

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $729.5156 to $730.5155. 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
February 10, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 6,508 $737.68 $4,800,821.44
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 28

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 1,556,821

F19 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $737.075 to $738.0749. 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 directly or indirectly by Berkshire Fund IX, L.P. ("IX"), Berkshire Fund IX-A, L.P. ("IX-A"), Berkshire Investors III LLC ("Investors III"), Berkshire Investors IV LLC ("Investors IV") and Stockbridge Fund, L.P. ("SF") (collectively, the "Berkshire Entities"). Berkshire Partners Holdings LLC ("BPH") is the general partner of BPSP, L.P. ("BPSP"), which is the managing member of each of Berkshire Partners LLC, the registered investment adviser to IX, IX-A, Investors III and Investors IV ("BP"), and SP, the registered investment adviser to SF. Ninth Berkshire Associates LLC ("9BA") is the general partner of each of IX and IX-A.

F3 · ownership.nature: [Continued from Footnote 2] Stockbridge Associates LLC ("SA") is the general partner of SF. The Reporting Person is a managing member of each of BPH, BPSP, BP, SP, 9BA, SA, Investors III and Investors IV. 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 the Berkshire Entities. 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
February 10, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 235 $737.68 $173,354.80
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 27

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 199,037

F19 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $737.075 to $738.0749. 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
February 10, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 3,283 $736.87 $2,419,144.21
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 26

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 1,563,329

F18 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $736.075 to $737.0749. 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 directly or indirectly by Berkshire Fund IX, L.P. ("IX"), Berkshire Fund IX-A, L.P. ("IX-A"), Berkshire Investors III LLC ("Investors III"), Berkshire Investors IV LLC ("Investors IV") and Stockbridge Fund, L.P. ("SF") (collectively, the "Berkshire Entities"). Berkshire Partners Holdings LLC ("BPH") is the general partner of BPSP, L.P. ("BPSP"), which is the managing member of each of Berkshire Partners LLC, the registered investment adviser to IX, IX-A, Investors III and Investors IV ("BP"), and SP, the registered investment adviser to SF. Ninth Berkshire Associates LLC ("9BA") is the general partner of each of IX and IX-A.

F3 · ownership.nature: [Continued from Footnote 2] Stockbridge Associates LLC ("SA") is the general partner of SF. The Reporting Person is a managing member of each of BPH, BPSP, BP, SP, 9BA, SA, Investors III and Investors IV. 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 the Berkshire Entities. 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
February 10, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 119 $736.87 $87,687.53
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 25

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 199,272

F18 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $736.075 to $737.0749. 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
February 10, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 1,691 $735.17 $1,243,172.47
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 24

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 1,566,612

F17 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $735.075 to $736.0749. 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 directly or indirectly by Berkshire Fund IX, L.P. ("IX"), Berkshire Fund IX-A, L.P. ("IX-A"), Berkshire Investors III LLC ("Investors III"), Berkshire Investors IV LLC ("Investors IV") and Stockbridge Fund, L.P. ("SF") (collectively, the "Berkshire Entities"). Berkshire Partners Holdings LLC ("BPH") is the general partner of BPSP, L.P. ("BPSP"), which is the managing member of each of Berkshire Partners LLC, the registered investment adviser to IX, IX-A, Investors III and Investors IV ("BP"), and SP, the registered investment adviser to SF. Ninth Berkshire Associates LLC ("9BA") is the general partner of each of IX and IX-A.

F3 · ownership.nature: [Continued from Footnote 2] Stockbridge Associates LLC ("SA") is the general partner of SF. The Reporting Person is a managing member of each of BPH, BPSP, BP, SP, 9BA, SA, Investors III and Investors IV. 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 the Berkshire Entities. 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
February 10, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 61 $735.17 $44,845.37
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 23

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 199,391

F17 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $735.075 to $736.0749. 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
February 10, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 24,833 $734.51 $18,240,086.83
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 22

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 1,568,303

F16 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $734.075 to $735.0749. 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 directly or indirectly by Berkshire Fund IX, L.P. ("IX"), Berkshire Fund IX-A, L.P. ("IX-A"), Berkshire Investors III LLC ("Investors III"), Berkshire Investors IV LLC ("Investors IV") and Stockbridge Fund, L.P. ("SF") (collectively, the "Berkshire Entities"). Berkshire Partners Holdings LLC ("BPH") is the general partner of BPSP, L.P. ("BPSP"), which is the managing member of each of Berkshire Partners LLC, the registered investment adviser to IX, IX-A, Investors III and Investors IV ("BP"), and SP, the registered investment adviser to SF. Ninth Berkshire Associates LLC ("9BA") is the general partner of each of IX and IX-A.

F3 · ownership.nature: [Continued from Footnote 2] Stockbridge Associates LLC ("SA") is the general partner of SF. The Reporting Person is a managing member of each of BPH, BPSP, BP, SP, 9BA, SA, Investors III and Investors IV. 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 the Berkshire Entities. 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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February 10, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 896 $734.51 $658,120.96
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 21

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 199,452

F16 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $734.075 to $735.0749. 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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February 10, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 10,152 $733.61 $7,447,608.72
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 20

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 1,593,136

F15 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $733.075 to $734.0749. 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 directly or indirectly by Berkshire Fund IX, L.P. ("IX"), Berkshire Fund IX-A, L.P. ("IX-A"), Berkshire Investors III LLC ("Investors III"), Berkshire Investors IV LLC ("Investors IV") and Stockbridge Fund, L.P. ("SF") (collectively, the "Berkshire Entities"). Berkshire Partners Holdings LLC ("BPH") is the general partner of BPSP, L.P. ("BPSP"), which is the managing member of each of Berkshire Partners LLC, the registered investment adviser to IX, IX-A, Investors III and Investors IV ("BP"), and SP, the registered investment adviser to SF. Ninth Berkshire Associates LLC ("9BA") is the general partner of each of IX and IX-A.

F3 · ownership.nature: [Continued from Footnote 2] Stockbridge Associates LLC ("SA") is the general partner of SF. The Reporting Person is a managing member of each of BPH, BPSP, BP, SP, 9BA, SA, Investors III and Investors IV. 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 the Berkshire Entities. 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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February 10, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 367 $733.61 $269,234.87
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 19

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 200,348

F15 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $733.075 to $734.0749. 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
February 10, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 20,462 $732.55 $14,989,438.10
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 18

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 1,603,288

F14 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $732.075 to $733.0749. 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 directly or indirectly by Berkshire Fund IX, L.P. ("IX"), Berkshire Fund IX-A, L.P. ("IX-A"), Berkshire Investors III LLC ("Investors III"), Berkshire Investors IV LLC ("Investors IV") and Stockbridge Fund, L.P. ("SF") (collectively, the "Berkshire Entities"). Berkshire Partners Holdings LLC ("BPH") is the general partner of BPSP, L.P. ("BPSP"), which is the managing member of each of Berkshire Partners LLC, the registered investment adviser to IX, IX-A, Investors III and Investors IV ("BP"), and SP, the registered investment adviser to SF. Ninth Berkshire Associates LLC ("9BA") is the general partner of each of IX and IX-A.

F3 · ownership.nature: [Continued from Footnote 2] Stockbridge Associates LLC ("SA") is the general partner of SF. The Reporting Person is a managing member of each of BPH, BPSP, BP, SP, 9BA, SA, Investors III and Investors IV. 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 the Berkshire Entities. 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
February 10, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 739 $732.55 $541,354.45
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 17

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 200,715

F14 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $732.075 to $733.0749. 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
February 10, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 110,118 $731.34 $80,533,698.12
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 16

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 1,623,750

F13 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $731.075 to $732.0749. 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 directly or indirectly by Berkshire Fund IX, L.P. ("IX"), Berkshire Fund IX-A, L.P. ("IX-A"), Berkshire Investors III LLC ("Investors III"), Berkshire Investors IV LLC ("Investors IV") and Stockbridge Fund, L.P. ("SF") (collectively, the "Berkshire Entities"). Berkshire Partners Holdings LLC ("BPH") is the general partner of BPSP, L.P. ("BPSP"), which is the managing member of each of Berkshire Partners LLC, the registered investment adviser to IX, IX-A, Investors III and Investors IV ("BP"), and SP, the registered investment adviser to SF. Ninth Berkshire Associates LLC ("9BA") is the general partner of each of IX and IX-A.

F3 · ownership.nature: [Continued from Footnote 2] Stockbridge Associates LLC ("SA") is the general partner of SF. The Reporting Person is a managing member of each of BPH, BPSP, BP, SP, 9BA, SA, Investors III and Investors IV. 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 the Berkshire Entities. 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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February 10, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 3,974 $731.34 $2,906,345.16
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 15

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 201,454

F13 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $731.075 to $732.0749. 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
February 10, 2023 Filed Feb 14, 2023 01:13 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 193 $746.11 $143,999.23
Disclosure

SEC source: 0000919574-23-001314 · ownership.xml · nonDerivative · entry 6

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 1,552,425

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $746.075 to $746.11. 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 directly or indirectly by Berkshire Fund IX, L.P. ("IX"), Berkshire Fund IX-A, L.P. ("IX-A"), Berkshire Investors III LLC ("Investors III"), Berkshire Investors IV LLC ("Investors IV") and Stockbridge Fund, L.P. ("SF") (collectively, the "Berkshire Entities"). Berkshire Partners Holdings LLC ("BPH") is the general partner of BPSP, L.P. ("BPSP"), which is the managing member of each of Berkshire Partners LLC, the registered investment adviser to IX, IX-A, Investors III and Investors IV ("BP"), and SP, the registered investment adviser to SF. Ninth Berkshire Associates LLC ("9BA") is the general partner of each of IX and IX-A.

F3 · ownership.nature: [Continued from Footnote 2] Stockbridge Associates LLC ("SA") is the general partner of SF. The Reporting Person is a managing member of each of BPH, BPSP, BP, SP, 9BA, SA, Investors III and Investors IV. 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 the Berkshire Entities. 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
February 10, 2023 Filed Feb 14, 2023 01:13 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 7 $746.11 $5,222.77
Disclosure

SEC source: 0000919574-23-001314 · ownership.xml · nonDerivative · entry 5

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 198,878

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $746.075 to $746.11. 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
February 10, 2023 Filed Feb 14, 2023 01:13 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 2,261 $740.23 $1,673,660.03
Disclosure

SEC source: 0000919574-23-001314 · ownership.xml · nonDerivative · entry 4

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 1,552,618

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $740.075 to $741.0749. 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 directly or indirectly by Berkshire Fund IX, L.P. ("IX"), Berkshire Fund IX-A, L.P. ("IX-A"), Berkshire Investors III LLC ("Investors III"), Berkshire Investors IV LLC ("Investors IV") and Stockbridge Fund, L.P. ("SF") (collectively, the "Berkshire Entities"). Berkshire Partners Holdings LLC ("BPH") is the general partner of BPSP, L.P. ("BPSP"), which is the managing member of each of Berkshire Partners LLC, the registered investment adviser to IX, IX-A, Investors III and Investors IV ("BP"), and SP, the registered investment adviser to SF. Ninth Berkshire Associates LLC ("9BA") is the general partner of each of IX and IX-A.

F3 · ownership.nature: [Continued from Footnote 2] Stockbridge Associates LLC ("SA") is the general partner of SF. The Reporting Person is a managing member of each of BPH, BPSP, BP, SP, 9BA, SA, Investors III and Investors IV. 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 the Berkshire Entities. 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
February 10, 2023 Filed Feb 14, 2023 01:13 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 82 $740.23 $60,698.86
Disclosure

SEC source: 0000919574-23-001314 · ownership.xml · nonDerivative · entry 3

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 198,885

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $740.075 to $741.0749. 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
February 10, 2023 Filed Feb 14, 2023 01:13 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 1,942 $738.28 $1,433,739.76
Disclosure

SEC source: 0000919574-23-001314 · ownership.xml · nonDerivative · entry 2

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 1,554,879

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $738.075 to $739.0749. 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 directly or indirectly by Berkshire Fund IX, L.P. ("IX"), Berkshire Fund IX-A, L.P. ("IX-A"), Berkshire Investors III LLC ("Investors III"), Berkshire Investors IV LLC ("Investors IV") and Stockbridge Fund, L.P. ("SF") (collectively, the "Berkshire Entities"). Berkshire Partners Holdings LLC ("BPH") is the general partner of BPSP, L.P. ("BPSP"), which is the managing member of each of Berkshire Partners LLC, the registered investment adviser to IX, IX-A, Investors III and Investors IV ("BP"), and SP, the registered investment adviser to SF. Ninth Berkshire Associates LLC ("9BA") is the general partner of each of IX and IX-A.

F3 · ownership.nature: [Continued from Footnote 2] Stockbridge Associates LLC ("SA") is the general partner of SF. The Reporting Person is a managing member of each of BPH, BPSP, BP, SP, 9BA, SA, Investors III and Investors IV. 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 the Berkshire Entities. 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
February 10, 2023 Filed Feb 14, 2023 01:13 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 70 $738.28 $51,679.60
Disclosure

SEC source: 0000919574-23-001314 · ownership.xml · nonDerivative · entry 1

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 198,967

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $738.075 to $739.0749. 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
February 09, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 10,894 $762.69 $8,308,744.86
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 14

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 1,733,868

F12 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $762.6757 to $762.76. 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 directly or indirectly by Berkshire Fund IX, L.P. ("IX"), Berkshire Fund IX-A, L.P. ("IX-A"), Berkshire Investors III LLC ("Investors III"), Berkshire Investors IV LLC ("Investors IV") and Stockbridge Fund, L.P. ("SF") (collectively, the "Berkshire Entities"). Berkshire Partners Holdings LLC ("BPH") is the general partner of BPSP, L.P. ("BPSP"), which is the managing member of each of Berkshire Partners LLC, the registered investment adviser to IX, IX-A, Investors III and Investors IV ("BP"), and SP, the registered investment adviser to SF. Ninth Berkshire Associates LLC ("9BA") is the general partner of each of IX and IX-A.

F3 · ownership.nature: [Continued from Footnote 2] Stockbridge Associates LLC ("SA") is the general partner of SF. The Reporting Person is a managing member of each of BPH, BPSP, BP, SP, 9BA, SA, Investors III and Investors IV. 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 the Berkshire Entities. 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
February 09, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 390 $762.69 $297,449.10
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 13

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 205,428

F12 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $762.6757 to $762.76. 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
February 09, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 7,924 $762.37 $6,041,019.88
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 12

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 1,744,762

F11 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $761.6757 to $762.6756. 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 directly or indirectly by Berkshire Fund IX, L.P. ("IX"), Berkshire Fund IX-A, L.P. ("IX-A"), Berkshire Investors III LLC ("Investors III"), Berkshire Investors IV LLC ("Investors IV") and Stockbridge Fund, L.P. ("SF") (collectively, the "Berkshire Entities"). Berkshire Partners Holdings LLC ("BPH") is the general partner of BPSP, L.P. ("BPSP"), which is the managing member of each of Berkshire Partners LLC, the registered investment adviser to IX, IX-A, Investors III and Investors IV ("BP"), and SP, the registered investment adviser to SF. Ninth Berkshire Associates LLC ("9BA") is the general partner of each of IX and IX-A.

F3 · ownership.nature: [Continued from Footnote 2] Stockbridge Associates LLC ("SA") is the general partner of SF. The Reporting Person is a managing member of each of BPH, BPSP, BP, SP, 9BA, SA, Investors III and Investors IV. 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 the Berkshire Entities. 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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February 09, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 283 $762.37 $215,750.71
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 11

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 205,818

F11 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $761.6757 to $762.6756. 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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February 09, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 8,824 $760.16 $6,707,651.84
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 10

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 1,752,686

F10 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $759.6757 to $760.6756. 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 directly or indirectly by Berkshire Fund IX, L.P. ("IX"), Berkshire Fund IX-A, L.P. ("IX-A"), Berkshire Investors III LLC ("Investors III"), Berkshire Investors IV LLC ("Investors IV") and Stockbridge Fund, L.P. ("SF") (collectively, the "Berkshire Entities"). Berkshire Partners Holdings LLC ("BPH") is the general partner of BPSP, L.P. ("BPSP"), which is the managing member of each of Berkshire Partners LLC, the registered investment adviser to IX, IX-A, Investors III and Investors IV ("BP"), and SP, the registered investment adviser to SF. Ninth Berkshire Associates LLC ("9BA") is the general partner of each of IX and IX-A.

F3 · ownership.nature: [Continued from Footnote 2] Stockbridge Associates LLC ("SA") is the general partner of SF. The Reporting Person is a managing member of each of BPH, BPSP, BP, SP, 9BA, SA, Investors III and Investors IV. 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 the Berkshire Entities. 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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February 09, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 315 $760.16 $239,450.40
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 9

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 206,101

F10 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $759.6757 to $760.6756. 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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February 09, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 2,726 $759.39 $2,070,097.14
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 8

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 1,761,510

F9 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $758.6757 to $759.6756. 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 directly or indirectly by Berkshire Fund IX, L.P. ("IX"), Berkshire Fund IX-A, L.P. ("IX-A"), Berkshire Investors III LLC ("Investors III"), Berkshire Investors IV LLC ("Investors IV") and Stockbridge Fund, L.P. ("SF") (collectively, the "Berkshire Entities"). Berkshire Partners Holdings LLC ("BPH") is the general partner of BPSP, L.P. ("BPSP"), which is the managing member of each of Berkshire Partners LLC, the registered investment adviser to IX, IX-A, Investors III and Investors IV ("BP"), and SP, the registered investment adviser to SF. Ninth Berkshire Associates LLC ("9BA") is the general partner of each of IX and IX-A.

F3 · ownership.nature: [Continued from Footnote 2] Stockbridge Associates LLC ("SA") is the general partner of SF. The Reporting Person is a managing member of each of BPH, BPSP, BP, SP, 9BA, SA, Investors III and Investors IV. 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 the Berkshire Entities. 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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February 09, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 97 $759.39 $73,660.83
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 7

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 206,416

F9 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $758.6757 to $759.6756. 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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February 09, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 9,207 $756.17 $6,962,057.19
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 6

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 1,764,236

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $755.6757 to $756.6756. 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 directly or indirectly by Berkshire Fund IX, L.P. ("IX"), Berkshire Fund IX-A, L.P. ("IX-A"), Berkshire Investors III LLC ("Investors III"), Berkshire Investors IV LLC ("Investors IV") and Stockbridge Fund, L.P. ("SF") (collectively, the "Berkshire Entities"). Berkshire Partners Holdings LLC ("BPH") is the general partner of BPSP, L.P. ("BPSP"), which is the managing member of each of Berkshire Partners LLC, the registered investment adviser to IX, IX-A, Investors III and Investors IV ("BP"), and SP, the registered investment adviser to SF. Ninth Berkshire Associates LLC ("9BA") is the general partner of each of IX and IX-A.

F3 · ownership.nature: [Continued from Footnote 2] Stockbridge Associates LLC ("SA") is the general partner of SF. The Reporting Person is a managing member of each of BPH, BPSP, BP, SP, 9BA, SA, Investors III and Investors IV. 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 the Berkshire Entities. 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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February 09, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 329 $756.17 $248,779.93
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 5

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 206,513

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $755.6757 to $756.6756. 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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February 09, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 3,705 $754.36 $2,794,903.80
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 4

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 1,773,443

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $753.6757 to $754.6756. 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 directly or indirectly by Berkshire Fund IX, L.P. ("IX"), Berkshire Fund IX-A, L.P. ("IX-A"), Berkshire Investors III LLC ("Investors III"), Berkshire Investors IV LLC ("Investors IV") and Stockbridge Fund, L.P. ("SF") (collectively, the "Berkshire Entities"). Berkshire Partners Holdings LLC ("BPH") is the general partner of BPSP, L.P. ("BPSP"), which is the managing member of each of Berkshire Partners LLC, the registered investment adviser to IX, IX-A, Investors III and Investors IV ("BP"), and SP, the registered investment adviser to SF. Ninth Berkshire Associates LLC ("9BA") is the general partner of each of IX and IX-A.

F3 · ownership.nature: [Continued from Footnote 2] Stockbridge Associates LLC ("SA") is the general partner of SF. The Reporting Person is a managing member of each of BPH, BPSP, BP, SP, 9BA, SA, Investors III and Investors IV. 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 the Berkshire Entities. 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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February 09, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 132 $754.36 $99,575.52
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 3

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 206,842

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $753.6757 to $754.6756. 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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February 09, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 25,600 $749.68 $19,191,808.00
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 2

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 1,777,148

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $749.6757 to $750.6756. 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 directly or indirectly by Berkshire Fund IX, L.P. ("IX"), Berkshire Fund IX-A, L.P. ("IX-A"), Berkshire Investors III LLC ("Investors III"), Berkshire Investors IV LLC ("Investors IV") and Stockbridge Fund, L.P. ("SF") (collectively, the "Berkshire Entities"). Berkshire Partners Holdings LLC ("BPH") is the general partner of BPSP, L.P. ("BPSP"), which is the managing member of each of Berkshire Partners LLC, the registered investment adviser to IX, IX-A, Investors III and Investors IV ("BP"), and SP, the registered investment adviser to SF. Ninth Berkshire Associates LLC ("9BA") is the general partner of each of IX and IX-A.

F3 · ownership.nature: [Continued from Footnote 2] Stockbridge Associates LLC ("SA") is the general partner of SF. The Reporting Person is a managing member of each of BPH, BPSP, BP, SP, 9BA, SA, Investors III and Investors IV. 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 the Berkshire Entities. 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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February 09, 2023 Filed Feb 14, 2023 01:08 UTC TransDigm Group INC TDG · Entity 2991 SaleCommon Stock 914 $749.68 $685,207.52
Disclosure

SEC source: 0000919574-23-001312 · ownership.xml · nonDerivative · entry 1

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 206,974

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $749.6757 to $750.6756. 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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December 02, 2022 Filed Dec 5, 2022 23:52 UTC TransDigm Group INC TDG · Entity 2991 OtherCommon Stock 4,411 $0.00 $0.00
Disclosure

SEC source: 0000919574-22-006983 · ownership.xml · nonDerivative · entry 3

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 59,267

F2 · kind: Represents Common Stock received as part of the distribution by the Berkshire Entities referred to in note (1) above.

F7 · ownership.direct: Represents shares of Common Stock held directly by the Reporting Person.

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December 02, 2022 Filed Dec 5, 2022 23:52 UTC TransDigm Group INC TDG · Entity 2991 OtherCommon Stock 1,024 $0.00 $0.00
Disclosure

SEC source: 0000919574-22-006983 · ownership.xml · nonDerivative · entry 2

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Family Trusts

Disclosed balance after: 47,735

F2 · kind: Represents Common Stock received as part of the distribution by the Berkshire Entities referred to in note (1) above.

F6 · ownership.nature: Represents shares of Common Stock beneficially owned by certain family trusts. The Reporting Person is a trustee and the Reporting Person's immediate family members are beneficiaries of such family trusts.

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December 02, 2022 Filed Dec 5, 2022 23:52 UTC TransDigm Group INC TDG · Entity 2991 OtherCommon Stock 613,183 $0.00 $0.00
Disclosure

SEC source: 0000919574-22-006983 · ownership.xml · nonDerivative · entry 1

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 1,802,748

F1 · kind: Represents Common Stock of the Issuer distributed by the Berkshire Entities (as defined below) to certain of their 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.

F4 · ownership.nature: Represents shares held directly or indirectly by Berkshire Fund VIII, L.P. ("VIII"), Berkshire Fund VIII-A, L.P. ("VIII-A"), Berkshire Fund IX, L.P. ("IX"), Berkshire Fund IX-A, L.P. ("IX-A"), Berkshire Investors III LLC ("Investors III"), Berkshire Investors IV LLC ("Investors IV") and Stockbridge Fund, L.P. ("SF") (collectively, the "Berkshire Entities"). Berkshire Partners Holdings LLC ("BPH") is the general partner of BPSP, L.P. ("BPSP"), which is the managing member of each of Berkshire Partners LLC, the registered investment adviser to VIII, VIII-A, IX, IX-A, Investors III and Investors IV ("BP"), and SP, the registered investment adviser to SF. Eighth Berkshire Associates LLC ("8BA") is the general partner of each of VIII and VIII-A. Ninth Berkshire Associates LLC ("9BA") is the general partner of each of IX and IX-A.

F5 · ownership.nature: [Continued from Footnote 2] Stockbridge Associates LLC ("SA") is the general partner of SF. The Reporting Person is a managing member of each of BPH, BPSP, BP, SP, 8BA, 9BA, SA, Investors III and Investors IV. 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 the Berkshire Entities. 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 09, 2022 Filed Nov 14, 2022 20:39 UTC TransDigm Group INC TDG · Entity 2991 GrantStock Option · Derivative 855 $0.00 Strike: $582.80 $0.00
Disclosure

SEC source: 0001209191-22-056554 · doc4.xml · derivative · entry 1

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 855

Underlying: Common Stock · 855 shares

Expires 2032-11-09

F1 · derivative.exercise_date: Vest based on the achievement of annual per share operating performance targets between fiscal 2023 and fiscal 2027.

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September 23, 2022 Filed Sep 27, 2022 19:08 UTC TransDigm Group INC TDG · Entity 2991 GrantCommon Stock 63 $587.10 $36,987.30
Disclosure

SEC source: 0001209191-22-051337 · doc4.xml · nonDerivative · entry 1

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,023

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May 23, 2022 Filed May 24, 2022 00:42 UTC TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 40 $567.06 $22,682.40
Disclosure

SEC source: 0000919574-22-003607 · ownership.xml · nonDerivative · entry 16

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 2,415,931

F14 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $567.03 to $567.08. 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 purchased at each separate price within the range set forth in this footnote.

F2 · ownership.nature: Represents shares held directly or indirectly by Berkshire Fund VIII, L.P. ("VIII"), Berkshire Fund VIII-A, L.P. ("VIII-A"), Berkshire Fund IX, L.P. ("IX"), Berkshire Fund IX-A, L.P. ("IX-A"), Berkshire Investors III LLC ("Investors III"), Berkshire Investors IV LLC ("Investors IV") and Stockbridge Fund, L.P. ("SF") (collectively, the "Berkshire Entities"). Berkshire Partners Holdings LLC ("BPH") is the general partner of BPSP, L.P. ("BPSP"), which is the managing member of each of Berkshire Partners LLC, the registered investment adviser to VIII, VIII-A, IX, IX-A, Investors III and Investors IV ("BP"), and SP, the registered investment adviser to SF. Eighth Berkshire Associates LLC ("8BA") is the general partner of each of VIII and VIII-A. Ninth Berkshire Associates LLC ("9BA") is the general partner of each of IX and IX-A.

F3 · ownership.nature: [Continued from Footnote 2] Stockbridge Associates LLC ("SA") is the general partner of SF. The Reporting Person is a managing member of each of BPH, BPSP, BP, SP, 8BA, 9BA, SA, Investors III and Investors IV. 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 the Berkshire Entities. 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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May 23, 2022 Filed May 24, 2022 00:42 UTC TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 160 $567.06 $90,729.60
Disclosure

SEC source: 0000919574-22-003607 · ownership.xml · nonDerivative · entry 15

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 207,888

F14 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $567.03 to $567.08. 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 purchased 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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Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.