=== SEC Form 4 — Statement of Changes in Beneficial Ownership ===
Document Type: 4
Period of Report: 2026-03-16
10b5-1 Pre-arranged Plan: Yes
--- 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: 2026-03-16 | 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: 2026-03-16 | Code: S (Open market sale)
Shares: -20 | Price: $1,222.87
Total Value: $24,457.40
Shares Owned After: 7,480 | Ownership: D (Direct)
[Transaction #3]
Security: Common Stock
Date: 2026-03-16 | Code: S (Open market sale)
Shares: -70 | Price: $1,231.69
Total Value: $86,218.20
Shares Owned After: 7,410 | 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 $1,231.1800 - $1,232.0700. 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: 2026-03-16 | Code: S (Open market sale)
Shares: -60 | Price: $1,232.57
Total Value: $73,954.27
Shares Owned After: 7,350 | 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 $1,232.2500 - $1,232.9900. 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: 2026-03-16 | Code: S (Open market sale)
Shares: -50 | Price: $1,233.62
Total Value: $61,680.90
Shares Owned After: 7,300 | 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 $1,233.3300 - $1,234.1000. 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: 2026-03-16 | Code: S (Open market sale)
Shares: -40 | Price: $1,235.12
Total Value: $49,405.00
Shares Owned After: 7,260 | 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 $1,234.6100 - $1,235.5600. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
[Transaction #7]
Security: Common Stock
Date: 2026-03-16 | Code: S (Open market sale)
Shares: -56 | Price: $1,236.31
Total Value: $69,233.47
Shares Owned After: 7,204 | 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 $1,235.8600 - $1,236.8500. 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 #8]
Security: Common Stock
Date: 2026-03-16 | Code: S (Open market sale)
Shares: -134 | Price: $1,237.75
Total Value: $165,857.96
Shares Owned After: 7,070 | 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 $1,237.1600 - $1,238.1400. 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: 2026-03-16 | Code: S (Open market sale)
Shares: -160 | Price: $1,238.57
Total Value: $198,171.92
Shares Owned After: 6,910 | 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 $1,238.1900 - $1,239.1100. 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: 2026-03-16 | Code: S (Open market sale)
Shares: -260 | Price: $1,239.94
Total Value: $322,385.57
Shares Owned After: 6,650 | 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 $1,239.3200 - $1,240.2900. 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: 2026-03-16 | Code: S (Open market sale)
Shares: -420 | Price: $1,240.92
Total Value: $521,185.14
Shares Owned After: 6,230 | 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 $1,240.3900 - $1,241.2800. 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: 2026-03-16 | Code: S (Open market sale)
Shares: -320 | Price: $1,241.98
Total Value: $397,435.20
Shares Owned After: 5,910 | 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 $1,241.5000 - $1,242.4800. 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: 2026-03-16 | Code: S (Open market sale)
Shares: -350 | Price: $1,243.00
Total Value: $435,048.57
Shares Owned After: 5,560 | 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 $1,242.5000 - $1,243.4800. 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: 2026-03-16 | Code: S (Open market sale)
Shares: -120 | Price: $1,244.09
Total Value: $149,290.38
Shares Owned After: 5,440 | 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 $1,243.5100 - $1,244.4400. 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: 2026-03-16 | Code: S (Open market sale)
Shares: -90 | Price: $1,245.10
Total Value: $112,059.20
Shares Owned After: 5,350 | 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 $1,244.5100 - $1,245.4800. 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: 2026-03-16 | Code: S (Open market sale)
Shares: -227 | Price: $1,246.21
Total Value: $282,889.28
Shares Owned After: 5,123 | 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 $1,245.5300 - $1,246.5200. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
[Transaction #17]
Security: Common Stock
Date: 2026-03-16 | Code: S (Open market sale)
Shares: -531 | Price: $1,247.08
Total Value: $662,199.32
Shares Owned After: 4,592 | 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 $1,246.5900 - $1,247.5700. 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: 2026-03-16 | Code: S (Open market sale)
Shares: -490 | Price: $1,248.24
Total Value: $611,635.89
Shares Owned After: 4,102 | 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 $1,247.6400 - $1,248.6200. 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: 2026-03-16 | Code: S (Open market sale)
Shares: -315 | Price: $1,249.29
Total Value: $393,525.85
Shares Owned After: 3,787 | 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 $1,248.6400 - $1,249.5900. 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 #20]
Security: Common Stock
Date: 2026-03-16 | Code: S (Open market sale)
Shares: -187 | Price: $1,250.25
Total Value: $233,797.54
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 $1,249.6800 - $1,250.6500. 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: 2026-03-16 | Code: M (Exercise of derivative)
Shares: -3,900 | Price: $0.00
Exercisable: N/A | Expires: 2027-11-08
Shares Owned After: 27,500 | 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 $1,231.1800 - $1,232.0700. 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 $1,241.5000 - $1,242.4800. 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 $1,242.5000 - $1,243.4800. 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 $1,243.5100 - $1,244.4400. 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 $1,244.5100 - $1,245.4800. 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 $1,245.5300 - $1,246.5200. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F15: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,246.5900 - $1,247.5700. 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 $1,247.6400 - $1,248.6200. 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 $1,248.6400 - $1,249.5900. 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 $1,249.6800 - $1,250.6500. 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 $1,232.2500 - $1,232.9900. 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 $1,233.3300 - $1,234.1000. 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 $1,234.6100 - $1,235.5600. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F5: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,235.8600 - $1,236.8500. 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.
F6: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,237.1600 - $1,238.1400. 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 $1,238.1900 - $1,239.1100. 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 $1,239.3200 - $1,240.2900. 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 $1,240.3900 - $1,241.2800. 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 (2026-03-17)
