# EDGAR Filing Document

**Accession Number:** 0001260221
**File Stem:** 0000919574-23-001314
**Filing Date:** 2023-2
**Character Count:** 15244
**Document Hash:** 6f5dba6ab228175dfbdf08e81ae0f0ae
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000919574-23-001314.hdr.sgml**: 20230213

**ACCESSION NUMBER**: 0000919574-23-001314

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20230209

**FILED AS OF DATE**: 20230213

**DATE AS OF CHANGE**: 20230213

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** SMALL ROBERT J
- **CENTRAL INDEX KEY:** 0001234544

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-32833
- **FILM NUMBER:** 23621316
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** TransDigm Group INC
- **CENTRAL INDEX KEY:** 0001260221
- **STANDARD INDUSTRIAL CLASSIFICATION:** AIRCRAFT PART & AUXILIARY EQUIPMENT, NEC [3728]
- **IRS NUMBER:** 510484716
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0930

**BUSINESS ADDRESS:**
- **STREET 1:** 1301 EAST 9TH STREET
- **STREET 2:** SUITE 3000
- **CITY:** CLEVELAND
- **STATE:** OH
- **ZIP:** 44114
- **BUSINESS PHONE:** 216 706 2960

**MAIL ADDRESS:**
- **STREET 1:** 1301 EAST 9TH STREET
- **STREET 2:** SUITE 3000
- **CITY:** CLEVELAND
- **STATE:** OH
- **ZIP:** 44114

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** TD HOLDING CORP
- **DATE OF NAME CHANGE:** 20030818

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>SMALL ROBERT J<br><sub>(Last) (First) (Middle)</sub><br>C/O BERKSHIRE PARTNERS LLC<br>200 CLARENDON STREET, 35TH FLOOR<br><sub>(Street)</sub><br>BOSTON, MA 02116<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-02-09 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [ ] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>TransDigm Group INC [ TDG ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock | 2023-02-10 |  | S |  | 70 | D | 738.28<sup>(4)</sup> | 198967 | I | By Stockbridge Partners LLC<sup>(1)</sup> |
| Common Stock | 2023-02-10 |  | S |  | 1942 | D | 738.28<sup>(4)</sup> | 1554879 | I | By Berkshire Entities<sup>(2)(3)</sup> |
| Common Stock | 2023-02-10 |  | S |  | 82 | D | 740.23<sup>(5)</sup> | 198885 | I | By Stockbridge Partners LLC<sup>(1)</sup> |
| Common Stock | 2023-02-10 |  | S |  | 2261 | D | 740.23<sup>(5)</sup> | 1552618 | I | By Berkshire Entities<sup>(2)(3)</sup> |
| Common Stock | 2023-02-10 |  | S |  | 7 | D | 746.11<sup>(6)</sup> | 198878 | I | By Stockbridge Partners LLC<sup>(1)</sup> |
| Common Stock | 2023-02-10 |  | S |  | 193 | D | 746.11<sup>(6)</sup> | 1552425 | I | By Berkshire Entities<sup>(2)(3)</sup> |
| Common Stock | 2023-02-13 |  | S |  | 509 | D | 729.80<sup>(7)</sup> | 198369 | I | By Stockbridge Partners LLC<sup>(1)</sup> |
| Common Stock | 2023-02-13 |  | S |  | 17369 | D | 729.80<sup>(7)</sup> | 1535056 | I | By Berkshire Entities<sup>(2)(3)</sup> |
| Common Stock | 2023-02-13 |  | S |  | 392 | D | 731.81<sup>(8)</sup> | 197977 | I | By Stockbridge Partners LLC<sup>(1)</sup> |
| Common Stock | 2023-02-13 |  | S |  | 13360 | D | 731.81<sup>(8)</sup> | 1521696 | I | By Berkshire Entities<sup>(2)(3)</sup> |
| Common Stock | 2023-02-13 |  | S |  | 751 | D | 735.28<sup>(9)</sup> | 197226 | I | By Stockbridge Partners LLC<sup>(1)</sup> |
| Common Stock | 2023-02-13 |  | S |  | 25619 | D | 735.28<sup>(9)</sup> | 1496077 | I | By Berkshire Entities<sup>(2)(3)</sup> |
| Common Stock | 2023-02-13 |  | S |  | 840 | D | 737.20<sup>(10)</sup> | 196386 | I | By Stockbridge Partners LLC<sup>(1)</sup> |
| Common Stock | 2023-02-13 |  | S |  | 28648 | D | 737.20<sup>(10)</sup> | 1467429 | I | By Berkshire Entities<sup>(2)(3)</sup> |
| Common Stock | 2023-02-13 |  | S |  | 493 | D | 737.88<sup>(11)</sup> | 195893 | I | By Stockbridge Partners LLC<sup>(1)</sup> |
| Common Stock | 2023-02-13 |  | S |  | 16827 | D | 737.88<sup>(11)</sup> | 1450602 | I | By Berkshire Entities<sup>(2)(3)</sup> |
| Common Stock | 2023-02-13 |  | S |  | 614 | D | 738.94<sup>(12)</sup> | 195279 | I | By Stockbridge Partners LLC<sup>(1)</sup> |
| Common Stock | 2023-02-13 |  | S |  | 20930 | D | 738.94<sup>(12)</sup> | 1429672 | I | By Berkshire Entities<sup>(2)(3)</sup> |
| Common Stock | 2023-02-13 |  | S |  | 499 | D | 740.19<sup>(13)</sup> | 194780 | I | By Stockbridge Partners LLC<sup>(1)</sup> |
| Common Stock | 2023-02-13 |  | S |  | 17034 | D | 740.19<sup>(13)</sup> | 1412638 | I | By Berkshire Entities<sup>(2)(3)</sup> |
| Common Stock | 2023-02-13 |  | S |  | 91 | D | 740.66<sup>(14)</sup> | 194689 | I | By Stockbridge Partners LLC<sup>(1)</sup> |
| Common Stock | 2023-02-13 |  | S |  | 3098 | D | 740.66<sup>(14)</sup> | 1409540 | I | By Berkshire Entities<sup>(2)(3)</sup> |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

---

### Footnotes:

(1) 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.

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

(3) [Continued from Footnote 2] Stockbridge Associates LLC ("SA") is the general partner of SF. The Reporting Person is a managing member of each of BPH, BPSP, BP, SP, 9BA, SA, Investors III and Investors IV. As such, the Reporting Person may be deemed to share voting and dispositive power with respect to the shares of the Issuer's common stock held by the Berkshire Entities. However, the Reporting Person disclaims beneficial ownership of these shares, except to the extent, if any, of his pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purposes.

(4) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $738.075 to $739.0749. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

(5) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $740.075 to $741.0749. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

(6) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $746.075 to $746.11. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

(7) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $729.5156 to $730.5155. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

(8) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $731.5156 to $732.5155. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

(9) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $734.5156 to $735.5155. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

(10) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $736.5156 to $737.5155. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

(11) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $737.5156 to $738.5155. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

(12) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $738.5156 to $739.5155. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

(13) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $739.5156 to $740.5155. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

(14) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $740.5156 to $740.658. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

**Remarks:**
Part 2 of 2.

**Signature:** /s/ Robert J. Small  
**Date:** 2023-02-13

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**