TransDigm Group Inc. Insider Trading

TDG

Last 12 months

Insiders bought $3.84M and sold $479M on the open market.

67% of the selling was scheduled in advance under 10b5-1 plans. Director Robert J Small sold $121M on Dec 9, 2025, 15% of their stake, outside a plan.

Net open-market

−$475M

3 buys · 38 sales

Under a 10b5-1 plan

67%

of the value sold

Insiders who bought / sold

2 / 5

executives and directors

Last open-market buy

Feb 2026

Feb 25, 2026

Get an email when TDG's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Oct 15	Joel Reiss Co-Chief Operating Officer	Sold10b5-1 plan 21 parts	4,100	$1,128.04 average	$4.62M	53%	Form 4
Sep 15	Joel Reiss Co-Chief Operating Officer	Sold10b5-1 plan 27 parts	3,900	$1,094.58 average	$4.27M	52%	Form 4
Aug 18	W Nicholas Howley Director	Sold10b5-1 plan 14 parts	10,132	$1,236.27 average	$12.5M	32%	Form 4
Aug 17	Joel Reiss Co-Chief Operating Officer	Sold10b5-1 plan 19 parts	3,900	$1,238.76 average	$4.83M	52%	Form 4
Jul 20	W Nicholas Howley Director	Sold10b5-1 plan 12 parts	10,132	$1,216.08 average	$12.3M	32%	Form 4
Jul 15	Joel Reiss Co-Chief Operating Officer	Sold10b5-1 plan 4 parts	414	$1,231.11 average	510K	10%	Form 4
Jul 15	Joel Reiss Co-Chief Operating Officer	Sold10b5-1 plan 29 parts	3,486	$1,216.21 average	$4.24M	46%	Form 4
Jun 18	W Nicholas Howley Director	SoldNo plan 22 parts	10,132	$1,319.55 average	$13.4M	32%	Form 4
Jun 18	W Nicholas Howley Director	SoldNo plan 22 parts	10,132	$1,319.55 average	$13.4M	32%	Form 4
Jun 15	Joel Reiss Co-Chief Operating Officer	SoldNo plan 18 parts	3,900	$1,276.78 average	$4.98M	52%	Form 4
May 18	W Nicholas Howley Director	Sold10b5-1 plan 25 parts	10,132	$1,180.82 average	$12M	32%	Form 4
May 15	Joel Reiss Co-Chief Operating Officer	Sold10b5-1 plan 27 parts	3,900	$1,154.09 average	$4.5M	52%	Form 4
Apr 20	W Nicholas Howley Director	Sold10b5-1 plan 11 parts	10,132	$1,265.06 average	$12.8M	32%	Form 4
Apr 15	Joel Reiss Co-Chief Operating Officer	Sold10b5-1 plan 17 parts	3,900	$1,280.46 average	$4.99M	52%	Form 4
Mar 18	W Nicholas Howley Director	Sold10b5-1 plan 23 parts	10,132	$1,213.05 average	$12.3M	32%	Form 4
Mar 16	Joel Reiss Co-Chief Operating Officer	Sold10b5-1 plan 19 parts	3,900	$1,243.70 average	$4.85M	52%	Form 4
Feb 25	Robert J Small Director	Bought	1	$1,285.00	1K	<0.1%	Form 4
Feb 18	W Nicholas Howley Director	Sold10b5-1 plan 13 parts	10,168	$1,307.68 average	$13.3M	32%	Form 4
Feb 17	Joel Reiss Co-Chief Operating Officer	Sold10b5-1 plan 23 parts	3,900	$1,293.88 average	$5.05M	52%	Form 4
Feb 6	Michael Lisman President & CEO	Bought	950	$1,284.26	$1.22M	22%	Form 4
Feb 2	Kevin M Stein Director	Sold10b5-1 plan 10 parts	11,075	$1,434.49 average	$15.9M	58%	Form 4
Feb 2	Kevin M Stein Director	Sold10b5-1 plan 22 parts	36,925	$1,425.78 average	$52.6M	66%	Form 4
Feb 2	Patrick Joseph Murphy Co-Chief Operating Officer	Sold10b5-1 plan	290	$1,430.10	415K	22%	Form 4
Jan 15	Joel Reiss Co-Chief Operating Officer	Sold10b5-1 plan 18 parts	3,900	$1,429.92 average	$5.58M	52%	Form 4
Jan 14	Kevin M Stein Director	Sold10b5-1 plan 3 parts	7,627	$1,406.38 average	$10.7M	48%	Form 4
Jan 8	Kevin M Stein Director	Sold10b5-1 plan 7 parts	17,373	$1,407.25 average	$24.4M	68%	Form 4
Jan 5	Kevin M Stein Director	Sold10b5-1 plan 21 parts	25,000	$1,373.59 average	$34.3M	75%	Form 4
Jan 2	Patrick Joseph Murphy Co-Chief Operating Officer	Sold10b5-1 plan	290	$1,329.03	385K	22%	Form 4
Dec 15, 2025	Joel Reiss Co-Chief Operating Officer	Sold10b5-1 plan 26 parts	3,900	$1,290.52 average	$5.03M	52%	Form 4
Dec 10, 2025	Robert J Small Director	SoldNo plan 3 parts	4,700	$1,290.19 average	$6.06M	0.9%	Form 4
Dec 9, 2025	Robert J Small Director	SoldNo plan 2 parts	90,953	$1,335.72 average	$121M	15%	Form 4
Dec 4, 2025	Kevin M Stein Director	Sold10b5-1 plan 8 parts	17,526	$1,362.29 average	$23.9M	68%	Form 4
Dec 1, 2025	Patrick Joseph Murphy Co-Chief Operating Officer	Sold10b5-1 plan	290	$1,351.06	392K	22%	Form 4
Nov 28, 2025	Kevin M Stein Director	Sold10b5-1 plan 3 parts	4,592	$1,360.73 average	$6.25M	36%	Form 4
Nov 25, 2025 – Nov 26, 2025	Kevin M Stein Director	Sold10b5-1 plan 3 parts	4,217	$1,360.57 average	$5.74M	34%	Form 4
Nov 21, 2025	Kevin M Stein Director	Sold10b5-1 plan	230	$1,360.31	313K	2.7%	Form 4
Nov 20, 2025	Kevin M Stein Director	Sold10b5-1 plan 3 parts	1,104	$1,360.89 average	$1.5M	12%	Form 4
Nov 18, 2025	Kevin M Stein Director	Sold10b5-1 plan 5 parts	7,191	$1,361.57 average	$9.79M	47%	Form 4
Nov 17, 2025	Joel Reiss Co-Chief Operating Officer	Sold10b5-1 plan 25 parts	3,900	$1,340.00 average	$5.23M	52%	Form 4
Nov 17, 2025	W Nicholas Howley Director	Sold10b5-1 plan 14 parts	2,736	$1,334.92 average	$3.65M	11%	Form 4

Oct 1510b5-1 plan
Joel Reiss
Co-Chief Operating Officer · sold 4,100 at avg $1,128.04
$4.62M
53% of stake
Sep 1510b5-1 plan
Joel Reiss
Co-Chief Operating Officer · sold 3,900 at avg $1,094.58
$4.27M
52% of stake
Aug 1810b5-1 plan
W Nicholas Howley
Director · sold 10,132 at avg $1,236.27
$12.5M
32% of stake
Aug 1710b5-1 plan
Joel Reiss
Co-Chief Operating Officer · sold 3,900 at avg $1,238.76
$4.83M
52% of stake
Jul 2010b5-1 plan
W Nicholas Howley
Director · sold 10,132 at avg $1,216.08
$12.3M
32% of stake
Jul 1510b5-1 plan
Joel Reiss
Co-Chief Operating Officer · sold 414 at avg $1,231.11
510K
10% of stake
Jul 1510b5-1 plan
Joel Reiss
Co-Chief Operating Officer · sold 3,486 at avg $1,216.21
$4.24M
46% of stake
Jun 18No plan
W Nicholas Howley
Director · sold 10,132 at avg $1,319.55
$13.4M
32% of stake
Jun 18No plan
W Nicholas Howley
Director · sold 10,132 at avg $1,319.55
$13.4M
32% of stake
Jun 15No plan
Joel Reiss
Co-Chief Operating Officer · sold 3,900 at avg $1,276.78
$4.98M
52% of stake
May 1810b5-1 plan
W Nicholas Howley
Director · sold 10,132 at avg $1,180.82
$12M
32% of stake
May 1510b5-1 plan
Joel Reiss
Co-Chief Operating Officer · sold 3,900 at avg $1,154.09
$4.5M
52% of stake
Apr 2010b5-1 plan
W Nicholas Howley
Director · sold 10,132 at avg $1,265.06
$12.8M
32% of stake
Apr 1510b5-1 plan
Joel Reiss
Co-Chief Operating Officer · sold 3,900 at avg $1,280.46
$4.99M
52% of stake
Mar 1810b5-1 plan
W Nicholas Howley
Director · sold 10,132 at avg $1,213.05
$12.3M
32% of stake
Mar 1610b5-1 plan
Joel Reiss
Co-Chief Operating Officer · sold 3,900 at avg $1,243.70
$4.85M
52% of stake
Feb 25
Robert J Small
Director · bought 1 at $1,285.00
1K
<0.1% of stake
Feb 1810b5-1 plan
W Nicholas Howley
Director · sold 10,168 at avg $1,307.68
$13.3M
32% of stake
Feb 1710b5-1 plan
Joel Reiss
Co-Chief Operating Officer · sold 3,900 at avg $1,293.88
$5.05M
52% of stake
Feb 6
Michael Lisman
President & CEO · bought 950 at $1,284.26
$1.22M
22% of stake
Feb 210b5-1 plan
Kevin M Stein
Director · sold 11,075 at avg $1,434.49
$15.9M
58% of stake
Feb 210b5-1 plan
Kevin M Stein
Director · sold 36,925 at avg $1,425.78
$52.6M
66% of stake
Feb 210b5-1 plan
Patrick Joseph Murphy
Co-Chief Operating Officer · sold 290 at $1,430.10
415K
22% of stake
Jan 1510b5-1 plan
Joel Reiss
Co-Chief Operating Officer · sold 3,900 at avg $1,429.92
$5.58M
52% of stake
Jan 1410b5-1 plan
Kevin M Stein
Director · sold 7,627 at avg $1,406.38
$10.7M
48% of stake
Jan 810b5-1 plan
Kevin M Stein
Director · sold 17,373 at avg $1,407.25
$24.4M
68% of stake
Jan 510b5-1 plan
Kevin M Stein
Director · sold 25,000 at avg $1,373.59
$34.3M
75% of stake
Jan 210b5-1 plan
Patrick Joseph Murphy
Co-Chief Operating Officer · sold 290 at $1,329.03
385K
22% of stake
Dec 15, 202510b5-1 plan
Joel Reiss
Co-Chief Operating Officer · sold 3,900 at avg $1,290.52
$5.03M
52% of stake
Dec 10, 2025No plan
Robert J Small
Director · sold 4,700 at avg $1,290.19
$6.06M
0.9% of stake
Dec 9, 2025No plan
Robert J Small
Director · sold 90,953 at avg $1,335.72
$121M
15% of stake
Dec 4, 202510b5-1 plan
Kevin M Stein
Director · sold 17,526 at avg $1,362.29
$23.9M
68% of stake
Dec 1, 202510b5-1 plan
Patrick Joseph Murphy
Co-Chief Operating Officer · sold 290 at $1,351.06
392K
22% of stake
Nov 28, 202510b5-1 plan
Kevin M Stein
Director · sold 4,592 at avg $1,360.73
$6.25M
36% of stake
Nov 25, 2025 – Nov 26, 202510b5-1 plan
Kevin M Stein
Director · sold 4,217 at avg $1,360.57
$5.74M
34% of stake
Nov 21, 202510b5-1 plan
Kevin M Stein
Director · sold 230 at $1,360.31
313K
2.7% of stake
Nov 20, 202510b5-1 plan
Kevin M Stein
Director · sold 1,104 at avg $1,360.89
$1.5M
12% of stake
Nov 18, 202510b5-1 plan
Kevin M Stein
Director · sold 7,191 at avg $1,361.57
$9.79M
47% of stake
Nov 17, 202510b5-1 plan
Joel Reiss
Co-Chief Operating Officer · sold 3,900 at avg $1,340.00
$5.23M
52% of stake
Nov 17, 202510b5-1 plan
W Nicholas Howley
Director · sold 2,736 at avg $1,334.92
$3.65M
11% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch TDG, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Held by ETFs

TDG is in 254 US ETFs. The largest of them, with TDG's weight in each:

Spot a number that looks wrong? Check it in TDG's SEC filings or

Download this analysis as a PDF (Pro)

Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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