=== SEC Form 4 — Statement of Changes in Beneficial Ownership ===
Document Type: 4
Period of Report: 2026-06-15
10b5-1 Pre-arranged Plan: No
--- Issuer ---
Name: TransDigm Group INC (TDG)
CIK: 0001260221
--- Reporting Owner ---
Name: Reiss Joel
CIK: 0001656109
Role: Officer (Co-Chief Operating Officer)
--- Non-Derivative Transactions ---
[Transaction #1]
Security: Common Stock
Date: 2026-06-15 | Code: M (Exercise of derivative)
Shares: +3,900 | Price: $284.97
Total Value: $1,111,383.00
Shares Owned After: 7,500 | Ownership: D (Direct)
[Transaction #2]
Security: Common Stock
Date: 2026-06-15 | Code: S (Open market sale)
Shares: -32 | Price: $1,268.87
Total Value: $40,603.75
Shares Owned After: 7,468 | Ownership: D (Direct)
Footnotes:
[F1] Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,268.6100 - $1,269.3500. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
[Transaction #3]
Security: Common Stock
Date: 2026-06-15 | Code: S (Open market sale)
Shares: -58 | Price: $1,270.02
Total Value: $73,661.25
Shares Owned After: 7,410 | Ownership: D (Direct)
Footnotes:
[F2] Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,269.6350 - $1,270.4900. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
[Transaction #4]
Security: Common Stock
Date: 2026-06-15 | Code: S (Open market sale)
Shares: -146 | Price: $1,271.29
Total Value: $185,608.11
Shares Owned After: 7,264 | Ownership: D (Direct)
Footnotes:
[F3] Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,270.7400 - $1,271.7100. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
[Transaction #5]
Security: Common Stock
Date: 2026-06-15 | Code: S (Open market sale)
Shares: -174 | Price: $1,272.38
Total Value: $221,394.29
Shares Owned After: 7,090 | Ownership: D (Direct)
Footnotes:
[F4] Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,271.7400 - $1,272.6100. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
[Transaction #6]
Security: Common Stock
Date: 2026-06-15 | Code: S (Open market sale)
Shares: -300 | Price: $1,273.33
Total Value: $381,998.88
Shares Owned After: 6,790 | Ownership: D (Direct)
Footnotes:
[F5] Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,272.9100 - $1,273.8900. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
[Transaction #7]
Security: Common Stock
Date: 2026-06-15 | Code: S (Open market sale)
Shares: -600 | Price: $1,274.35
Total Value: $764,610.78
Shares Owned After: 6,190 | Ownership: D (Direct)
Footnotes:
[F6] Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,273.9200 - $1,274.8900. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
[Transaction #8]
Security: Common Stock
Date: 2026-06-15 | Code: S (Open market sale)
Shares: -502 | Price: $1,275.35
Total Value: $640,226.80
Shares Owned After: 5,688 | Ownership: D (Direct)
Footnotes:
[F7] Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,274.9400 - $1,275.9350. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
[Transaction #9]
Security: Common Stock
Date: 2026-06-15 | Code: S (Open market sale)
Shares: -428 | Price: $1,276.42
Total Value: $546,309.09
Shares Owned After: 5,260 | Ownership: D (Direct)
Footnotes:
[F8] Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,275.9400 - $1,276.8500. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
[Transaction #10]
Security: Common Stock
Date: 2026-06-15 | Code: S (Open market sale)
Shares: -494 | Price: $1,277.43
Total Value: $631,050.52
Shares Owned After: 4,766 | Ownership: D (Direct)
Footnotes:
[F9] Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,276.9800 - $1,277.9700. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
[Transaction #11]
Security: Common Stock
Date: 2026-06-15 | Code: S (Open market sale)
Shares: -316 | Price: $1,278.53
Total Value: $404,016.59
Shares Owned After: 4,450 | Ownership: D (Direct)
Footnotes:
[F10] Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,277.9900 - $1,278.8700. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
[Transaction #12]
Security: Common Stock
Date: 2026-06-15 | Code: S (Open market sale)
Shares: -158 | Price: $1,279.55
Total Value: $202,169.34
Shares Owned After: 4,292 | Ownership: D (Direct)
Footnotes:
[F11] Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,279.0400 - $1,280.0200. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
[Transaction #13]
Security: Common Stock
Date: 2026-06-15 | Code: S (Open market sale)
Shares: -152 | Price: $1,280.50
Total Value: $194,635.53
Shares Owned After: 4,140 | Ownership: D (Direct)
Footnotes:
[F12] Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,280.0900 - $1,280.9800. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
[Transaction #14]
Security: Common Stock
Date: 2026-06-15 | Code: S (Open market sale)
Shares: -150 | Price: $1,281.84
Total Value: $192,276.20
Shares Owned After: 3,990 | Ownership: D (Direct)
Footnotes:
[F13] Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,281.2600 - $1,282.1700. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
[Transaction #15]
Security: Common Stock
Date: 2026-06-15 | Code: S (Open market sale)
Shares: -90 | Price: $1,282.60
Total Value: $115,434.04
Shares Owned After: 3,900 | Ownership: D (Direct)
Footnotes:
[F14] Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,282.3000 - $1,283.2400. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
[Transaction #16]
Security: Common Stock
Date: 2026-06-15 | Code: S (Open market sale)
Shares: -136 | Price: $1,283.73
Total Value: $174,586.82
Shares Owned After: 3,764 | Ownership: D (Direct)
Footnotes:
[F15] Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,283.4400 - $1,284.2000. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
[Transaction #17]
Security: Common Stock
Date: 2026-06-15 | Code: S (Open market sale)
Shares: -74 | Price: $1,285.04
Total Value: $95,092.80
Shares Owned After: 3,690 | Ownership: D (Direct)
Footnotes:
[F16] Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,284.4700 - $1,285.2000. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
[Transaction #18]
Security: Common Stock
Date: 2026-06-15 | Code: S (Open market sale)
Shares: -60 | Price: $1,285.90
Total Value: $77,154.20
Shares Owned After: 3,630 | Ownership: D (Direct)
Footnotes:
[F17] Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,285.7500 - $1,285.9400. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
[Transaction #19]
Security: Common Stock
Date: 2026-06-15 | Code: S (Open market sale)
Shares: -30 | Price: $1,287.59
Total Value: $38,627.60
Shares Owned After: 3,600 | Ownership: D (Direct)
Footnotes:
[F18] Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,287.3600 - $1,288.0400. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
--- Derivative Transactions ---
[Transaction #1]
Security: Stock Option
Date: 2026-06-15 | Code: M (Exercise of derivative)
Shares: -3,900 | Price: $0.00
Exercisable: N/A | Expires: 2027-11-08
Shares Owned After: 15,800 | Ownership: D (Direct)
--- Footnotes (Complete Index) ---
F1: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,268.6100 - $1,269.3500. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F10: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,277.9900 - $1,278.8700. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F11: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,279.0400 - $1,280.0200. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F12: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,280.0900 - $1,280.9800. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F13: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,281.2600 - $1,282.1700. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F14: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,282.3000 - $1,283.2400. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F15: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,283.4400 - $1,284.2000. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F16: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,284.4700 - $1,285.2000. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F17: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,285.7500 - $1,285.9400. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F18: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,287.3600 - $1,288.0400. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F2: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,269.6350 - $1,270.4900. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F3: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,270.7400 - $1,271.7100. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F4: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,271.7400 - $1,272.6100. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F5: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,272.9100 - $1,273.8900. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F6: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,273.9200 - $1,274.8900. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F7: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,274.9400 - $1,275.9350. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F8: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,275.9400 - $1,276.8500. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F9: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,276.9800 - $1,277.9700. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
--- Signature ---
/s/ /s/ Rachel L. Quinlan as attorney in fact for Joel Reiss (2026-06-16)
