W. Nicholas Howley - 18 Aug 2026 Form 4 Insider Report for TransDigm Group INC (TDG)

Reporting relationship: Director
Issuer ticker: TDG
Reported as of: 18 Aug 2026
Net transaction value: -$12,525,949
SEC form: 4
Accepted by SEC: 19 Aug 2026, 16:21:10 UTC
Prior SEC filing: 21 Jul 2026
Source filing: View source filing
Reporting owner signature: /s/ Rachel L. Quinlan as attorney in fact for W. Nicholas Howley

Key filing fact

W. Nicholas Howley filed Form 4 for TransDigm Group INC (TDG) on 19 Aug 2026.

Key facts

This page summarizes W. Nicholas Howley's Form 4 filing for TransDigm Group INC (TDG).
16 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 19 Aug 2026, 16:21.

Change

Previous filing in this sequence was filed on 21 Jul 2026.
Current net transaction value: -$12,525,949.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001352573 Primary reporting owner

Howley W Nicholas

Relationship: Director
Address: 1350 EUCLID AVE, SUITE 1600, CLEVELAND
Signature: /s/ Rachel L. Quinlan as attorney in fact for W. Nicholas Howley
Signature date: 19 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

TDG transaction

Common Stock

Options Exercise

Transaction value
Shares: +10,132
Change %: +47%
Price: $66.47^*
Shares after: 31,680
Date: 18 Aug 2026
Ownership: W. Nicholas Howley Family Trust u/a/d 4/23/99
Footnotes: F1

TDG transaction

Common Stock

Sale

Transaction value: $250,023
Shares: -204
Change %: -0.64%
Price: $1225.60
Shares after: 31,476
Date: 18 Aug 2026
Ownership: W. Nicholas Howley Family Trust u/a/d 4/23/99
Footnotes: F2

TDG transaction

Common Stock

Sale

Transaction value: $85,934
Shares: -70
Change %: -0.22%
Price: $1227.62
Shares after: 31,406
Date: 18 Aug 2026
Ownership: W. Nicholas Howley Family Trust u/a/d 4/23/99
Footnotes: F3

TDG transaction

Common Stock

Sale

Transaction value: $356,437
Shares: -290
Change %: -0.92%
Price: $1229.09
Shares after: 31,116
Date: 18 Aug 2026
Ownership: W. Nicholas Howley Family Trust u/a/d 4/23/99
Footnotes: F4

TDG transaction

Common Stock

Sale

Transaction value: $701,111
Shares: -570
Change %: -1.8%
Price: $1230.02
Shares after: 30,546
Date: 18 Aug 2026
Ownership: W. Nicholas Howley Family Trust u/a/d 4/23/99
Footnotes: F5

TDG transaction

Common Stock

Sale

Transaction value: $1,021,829
Shares: -830
Change %: -2.7%
Price: $1231.12
Shares after: 29,716
Date: 18 Aug 2026
Ownership: W. Nicholas Howley Family Trust u/a/d 4/23/99
Footnotes: F6

TDG transaction

Common Stock

Sale

Transaction value: $1,299,775
Shares: -1,055
Change %: -3.6%
Price: $1232.01
Shares after: 28,661
Date: 18 Aug 2026
Ownership: W. Nicholas Howley Family Trust u/a/d 4/23/99
Footnotes: F7

TDG transaction

Common Stock

Sale

Transaction value: $554,987
Shares: -450
Change %: -1.6%
Price: $1233.30
Shares after: 28,211
Date: 18 Aug 2026
Ownership: W. Nicholas Howley Family Trust u/a/d 4/23/99
Footnotes: F8

TDG transaction

Common Stock

Sale

Transaction value: $333,366
Shares: -270
Change %: -0.96%
Price: $1234.69
Shares after: 27,941
Date: 18 Aug 2026
Ownership: W. Nicholas Howley Family Trust u/a/d 4/23/99
Footnotes: F9

TDG transaction

Common Stock

Sale

Transaction value: $173,057
Shares: -140
Change %: -0.5%
Price: $1236.12
Shares after: 27,801
Date: 18 Aug 2026
Ownership: W. Nicholas Howley Family Trust u/a/d 4/23/99
Footnotes: F10

TDG transaction

Common Stock

Sale

Transaction value: $309,224
Shares: -250
Change %: -0.9%
Price: $1236.89
Shares after: 27,551
Date: 18 Aug 2026
Ownership: W. Nicholas Howley Family Trust u/a/d 4/23/99
Footnotes: F11

TDG transaction

Common Stock

Sale

Transaction value: $643,803
Shares: -520
Change %: -1.9%
Price: $1238.08
Shares after: 27,031
Date: 18 Aug 2026
Ownership: W. Nicholas Howley Family Trust u/a/d 4/23/99
Footnotes: F12

TDG transaction

Common Stock

Sale

Transaction value: $4,931,915
Shares: -3,980
Change %: -15%
Price: $1239.17
Shares after: 23,051
Date: 18 Aug 2026
Ownership: W. Nicholas Howley Family Trust u/a/d 4/23/99
Footnotes: F13

TDG transaction

Common Stock

Sale

Transaction value: $1,628,674
Shares: -1,313
Change %: -5.7%
Price: $1240.42
Shares after: 21,738
Date: 18 Aug 2026
Ownership: W. Nicholas Howley Family Trust u/a/d 4/23/99
Footnotes: F14

TDG transaction

Common Stock

Sale

Transaction value: $235,816
Shares: -190
Change %: -0.87%
Price: $1241.14
Shares after: 21,548
Date: 18 Aug 2026
Ownership: W. Nicholas Howley Family Trust u/a/d 4/23/99
Footnotes: F15

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

TDG transaction Derivative

Stock Option

Options Exercise

Transaction value
Shares: -10,132
Change %: -86%
Price: $0.000000^*
Shares after: 1,700
Date: 18 Aug 2026
Ownership: W. Nicholas Howley Family Trust u/a/d 4/23/99
Underlying class: Common Stock
Underlying amount: 10,132
Exercise price: $66.47
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 15 footnotes

Footnote F1

The exercise price has been adjusted for dividends declared since August 1, 2022.

Footnote F10

Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,235.4300 - $1,236.6700. 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.

Footnote F11

Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,236.7100 - $1,237.4600. 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.

Footnote F12

Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,237.7100 - $1,238.4200. 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.

Footnote F13

Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,238.8700 - $1,239.8500. 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.

Footnote F14

Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,239.8700 - $1,240.7500. 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.

Footnote F15

Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,240.9200 - $1,241.4600. 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.

Footnote F2

Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,225.1750 - $1,226.0000. 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.

Footnote F3

Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,227.1550 - $1,227.9700. 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.

Footnote F4

Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,228.4900 - $1,229.4800. 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.

Footnote F5

Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,229.4900 - $1,230.1400. 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.

Footnote F6

Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,230.6000 - $1,231.5800. 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.

Footnote F7

Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,231.6100 - $1,232.5100. 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.

Footnote F8

Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,232.8900 - $1,233.6700. 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.

Footnote F9

Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,234.4000 - $1,235.2100. 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.