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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
May 23, 2022 Filed May 24, 2022 00:42 UTC TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 2,722 $566.39 $1,541,713.58
Disclosure

SEC source: 0000919574-22-003607 · ownership.xml · nonDerivative · entry 14

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 2,415,891

F13 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $566.03 to $567.0299. 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 10,986 $566.39 $6,222,360.54
Disclosure

SEC source: 0000919574-22-003607 · 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: 207,728

F13 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $566.03 to $567.0299. 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.

Read SEC document
May 23, 2022 Filed May 24, 2022 00:42 UTC TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 1,244 $565.52 $703,506.88
Disclosure

SEC source: 0000919574-22-003607 · ownership.xml · nonDerivative · entry 12

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 2,413,169

F12 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $565.03 to $566.0299. 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 5,019 $565.52 $2,838,344.88
Disclosure

SEC source: 0000919574-22-003607 · 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: 196,742

F12 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $565.03 to $566.0299. 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.

Read SEC document
May 23, 2022 Filed May 24, 2022 00:42 UTC TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 497 $564.90 $280,755.30
Disclosure

SEC source: 0000919574-22-003607 · ownership.xml · nonDerivative · entry 10

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 2,411,925

F11 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $564.03 to $565.0299. 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 2,003 $564.90 $1,131,494.70
Disclosure

SEC source: 0000919574-22-003607 · 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: 191,723

F11 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $564.03 to $565.0299. 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.

Read SEC document
May 23, 2022 Filed May 24, 2022 00:42 UTC TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 135 $563.36 $76,053.60
Disclosure

SEC source: 0000919574-22-003607 · ownership.xml · nonDerivative · entry 8

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 2,411,428

F10 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $563.03 to $564.0299. 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.

Read SEC document
May 23, 2022 Filed May 24, 2022 00:42 UTC TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 547 $563.36 $308,157.92
Disclosure

SEC source: 0000919574-22-003607 · 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: 189,720

F10 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $563.03 to $564.0299. 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.

Read SEC document
May 23, 2022 Filed May 24, 2022 00:42 UTC TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 20 $563.02 $11,260.40
Disclosure

SEC source: 0000919574-22-003607 · ownership.xml · nonDerivative · entry 6

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 2,411,293

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $562.03 to $563.0299. 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.

Read SEC document
May 23, 2022 Filed May 24, 2022 00:42 UTC TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 80 $563.02 $45,041.60
Disclosure

SEC source: 0000919574-22-003607 · 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: 189,173

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $562.03 to $563.0299. 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.

Read SEC document
May 23, 2022 Filed May 24, 2022 00:42 UTC TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 98 $561.04 $54,981.92
Disclosure

SEC source: 0000919574-22-003607 · ownership.xml · nonDerivative · entry 4

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 2,411,273

F8 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $561.03 to $562.0299. 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.

Read SEC document
May 23, 2022 Filed May 24, 2022 00:42 UTC TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 396 $561.04 $222,171.84
Disclosure

SEC source: 0000919574-22-003607 · 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: 189,093

F8 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $561.03 to $562.0299. 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.

Read SEC document
May 23, 2022 Filed May 24, 2022 00:42 UTC TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 895 $560.71 $501,835.45
Disclosure

SEC source: 0000919574-22-003607 · ownership.xml · nonDerivative · entry 2

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 2,411,175

F7 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $560.03 to $561.0299. 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.

Read SEC document
May 23, 2022 Filed May 24, 2022 00:42 UTC TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 3,611 $560.71 $2,024,723.81
Disclosure

SEC source: 0000919574-22-003607 · 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: 188,697

F7 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $560.03 to $561.0299. 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.

Read SEC document
May 23, 2022 Filed Jun 3, 2022 21:04 UTC Amendment TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 40 $567.06 $22,682.40
Disclosure

SEC source: 0000919574-22-003737 · 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 Jun 3, 2022 21:04 UTC Amendment TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 160 $567.06 $90,729.60
Disclosure

SEC source: 0000919574-22-003737 · 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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May 23, 2022 Filed Jun 3, 2022 21:04 UTC Amendment TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 2,722 $566.39 $1,541,713.58
Disclosure

SEC source: 0000919574-22-003737 · ownership.xml · nonDerivative · entry 14

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 2,415,891

F13 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $566.03 to $567.0299. 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 Jun 3, 2022 21:04 UTC Amendment TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 10,986 $566.39 $6,222,360.54
Disclosure

SEC source: 0000919574-22-003737 · 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: 207,728

F13 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $566.03 to $567.0299. 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.

Read SEC document
May 23, 2022 Filed Jun 3, 2022 21:04 UTC Amendment TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 1,244 $565.52 $703,506.88
Disclosure

SEC source: 0000919574-22-003737 · ownership.xml · nonDerivative · entry 12

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 2,413,169

F12 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $565.03 to $566.0299. 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 Jun 3, 2022 21:04 UTC Amendment TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 5,019 $565.52 $2,838,344.88
Disclosure

SEC source: 0000919574-22-003737 · 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: 196,742

F12 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $565.03 to $566.0299. 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.

Read SEC document
May 23, 2022 Filed Jun 3, 2022 21:04 UTC Amendment TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 497 $564.90 $280,755.30
Disclosure

SEC source: 0000919574-22-003737 · ownership.xml · nonDerivative · entry 10

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 2,411,925

F11 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $564.03 to $565.0299. 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 Jun 3, 2022 21:04 UTC Amendment TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 2,003 $564.90 $1,131,494.70
Disclosure

SEC source: 0000919574-22-003737 · 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: 191,723

F11 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $564.03 to $565.0299. 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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May 23, 2022 Filed Jun 3, 2022 21:04 UTC Amendment TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 135 $563.36 $76,053.60
Disclosure

SEC source: 0000919574-22-003737 · ownership.xml · nonDerivative · entry 8

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 2,411,428

F10 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $563.03 to $564.0299. 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 Jun 3, 2022 21:04 UTC Amendment TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 547 $563.36 $308,157.92
Disclosure

SEC source: 0000919574-22-003737 · 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: 189,720

F10 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $563.03 to $564.0299. 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.

Read SEC document
May 23, 2022 Filed Jun 3, 2022 21:04 UTC Amendment TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 20 $563.02 $11,260.40
Disclosure

SEC source: 0000919574-22-003737 · ownership.xml · nonDerivative · entry 6

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 2,411,293

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $562.03 to $563.0299. 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 Jun 3, 2022 21:04 UTC Amendment TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 80 $563.02 $45,041.60
Disclosure

SEC source: 0000919574-22-003737 · 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: 189,173

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $562.03 to $563.0299. 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.

Read SEC document
May 23, 2022 Filed Jun 3, 2022 21:04 UTC Amendment TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 98 $561.04 $54,981.92
Disclosure

SEC source: 0000919574-22-003737 · ownership.xml · nonDerivative · entry 4

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 2,411,273

F8 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $561.03 to $562.0299. 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.

Read SEC document
May 23, 2022 Filed Jun 3, 2022 21:04 UTC Amendment TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 396 $561.04 $222,171.84
Disclosure

SEC source: 0000919574-22-003737 · 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: 189,093

F8 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $561.03 to $562.0299. 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.

Read SEC document
May 23, 2022 Filed Jun 3, 2022 21:04 UTC Amendment TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 895 $560.71 $501,835.45
Disclosure

SEC source: 0000919574-22-003737 · ownership.xml · nonDerivative · entry 2

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Berkshire Entities

Disclosed balance after: 2,411,175

F7 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $560.03 to $561.0299. 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 Jun 3, 2022 21:04 UTC Amendment TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 3,611 $560.71 $2,024,723.81
Disclosure

SEC source: 0000919574-22-003737 · 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: 188,697

F7 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $560.03 to $561.0299. 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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May 19, 2022 Filed May 24, 2022 00:32 UTC TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 554 $549.43 $304,384.22
Disclosure

SEC source: 0000919574-22-003605 · ownership.xml · nonDerivative · entry 12

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 185,086

F13 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $549.105 to $549.5. 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.

Read SEC document
May 19, 2022 Filed May 24, 2022 00:32 UTC TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 1,133 $548.45 $621,393.85
Disclosure

SEC source: 0000919574-22-003605 · 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: 184,532

F12 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $548.105 to $549.1049. 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.

Read SEC document
May 19, 2022 Filed May 24, 2022 00:32 UTC TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 5,011 $547.75 $2,744,775.25
Disclosure

SEC source: 0000919574-22-003605 · ownership.xml · nonDerivative · entry 10

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 183,399

F11 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $547.105 to $548.1049. 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.

Read SEC document
May 19, 2022 Filed May 24, 2022 00:32 UTC TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 200 $546.65 $109,330.00
Disclosure

SEC source: 0000919574-22-003605 · 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: 178,388

F10 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $546.105 to $547.1049. 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.

Read SEC document
May 19, 2022 Filed May 24, 2022 00:32 UTC TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 4,268 $544.64 $2,324,523.52
Disclosure

SEC source: 0000919574-22-003605 · ownership.xml · nonDerivative · entry 8

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 178,188

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $544.105 to $545.1049. 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.

Read SEC document
May 19, 2022 Filed May 24, 2022 00:32 UTC TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 2,832 $543.66 $1,539,645.12
Disclosure

SEC source: 0000919574-22-003605 · 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: 173,920

F8 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $543.105 to $544.1049. 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.

Read SEC document
May 19, 2022 Filed May 24, 2022 00:32 UTC TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 200 $542.42 $108,484.00
Disclosure

SEC source: 0000919574-22-003605 · ownership.xml · nonDerivative · entry 6

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 171,088

F7 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $542.105 to $543.1049. 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.

Read SEC document
May 19, 2022 Filed May 24, 2022 00:32 UTC TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 400 $541.75 $216,700.00
Disclosure

SEC source: 0000919574-22-003605 · 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: 170,888

F6 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $541.105 to $542.1049. 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.

Read SEC document
May 19, 2022 Filed May 24, 2022 00:32 UTC TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 751 $540.59 $405,983.09
Disclosure

SEC source: 0000919574-22-003605 · ownership.xml · nonDerivative · entry 4

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 170,488

F5 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $540.105 to $541.1049. 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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May 19, 2022 Filed May 24, 2022 00:32 UTC TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 200 $539.67 $107,934.00
Disclosure

SEC source: 0000919574-22-003605 · 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: 169,737

F4 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $539.105 to $540.1049. 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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May 19, 2022 Filed May 24, 2022 00:32 UTC TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 2,151 $538.55 $1,158,421.05
Disclosure

SEC source: 0000919574-22-003605 · ownership.xml · nonDerivative · entry 2

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 169,537

F3 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $538.105 to $539.1049. 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.

Read SEC document
May 19, 2022 Filed May 24, 2022 00:32 UTC TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 1,698 $537.50 $912,675.00
Disclosure

SEC source: 0000919574-22-003605 · 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: 167,386

F2 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $537.105 to $538.1049. 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.

Read SEC document
May 19, 2022 Filed Jun 3, 2022 20:52 UTC Amendment TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 554 $549.43 $304,384.22
Disclosure

SEC source: 0000919574-22-003735 · ownership.xml · nonDerivative · entry 12

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 185,086

F13 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $549.105 to $549.5. 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.

Read SEC document
May 19, 2022 Filed Jun 3, 2022 20:52 UTC Amendment TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 1,133 $548.45 $621,393.85
Disclosure

SEC source: 0000919574-22-003735 · 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: 184,532

F12 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $548.105 to $549.1049. 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.

Read SEC document
May 19, 2022 Filed Jun 3, 2022 20:52 UTC Amendment TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 5,011 $547.75 $2,744,775.25
Disclosure

SEC source: 0000919574-22-003735 · ownership.xml · nonDerivative · entry 10

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 183,399

F11 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $547.105 to $548.1049. 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.

Read SEC document
May 19, 2022 Filed Jun 3, 2022 20:52 UTC Amendment TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 200 $546.65 $109,330.00
Disclosure

SEC source: 0000919574-22-003735 · 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: 178,388

F10 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $546.105 to $547.1049. 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.

Read SEC document
May 19, 2022 Filed Jun 3, 2022 20:52 UTC Amendment TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 4,268 $544.64 $2,324,523.52
Disclosure

SEC source: 0000919574-22-003735 · ownership.xml · nonDerivative · entry 8

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 178,188

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $544.105 to $545.1049. 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.

Read SEC document
May 19, 2022 Filed Jun 3, 2022 20:52 UTC Amendment TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 2,832 $543.66 $1,539,645.12
Disclosure

SEC source: 0000919574-22-003735 · 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: 173,920

F8 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $543.105 to $544.1049. 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.

Read SEC document
May 19, 2022 Filed Jun 3, 2022 20:52 UTC Amendment TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 200 $542.42 $108,484.00
Disclosure

SEC source: 0000919574-22-003735 · ownership.xml · nonDerivative · entry 6

SMALL ROBERT J · CIK 0001234544 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Stockbridge Partners LLC

Disclosed balance after: 171,088

F7 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $542.105 to $543.1049. 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.

Read SEC document
May 19, 2022 Filed Jun 3, 2022 20:52 UTC Amendment TransDigm Group INC TDG · Entity 2991 PurchaseCommon Stock 400 $541.75 $216,700.00
Disclosure

SEC source: 0000919574-22-003735 · 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: 170,888

F6 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $541.105 to $542.1049. 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.