TransDigm TDG Insider Ownership

NYSE TDG

$1,128.92 -14.14 (-1.24%)

As of: Oct 21, 2026 · 3:59 PM EDT

Insider Holdings by Owner

283.71K Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

1.22%

▲+0.0008% pp QoQ

Shares Held by Insiders

702.27K

filed for Sep 2026

▲+0.07% QoQ

Shares Outstanding

57.40Mn

57,400,000 shares

Direct Holdings

106.23K

Indirect: 596.03K

Net Shares Traded (QoQ)

+460

net buying in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Updated Oct 16, 2026

Across the past 12 months, open-market trades by TransDigm insiders totaled $3.84 million in purchases (2.9K shares) and $466.51 million in sales (350.55K shares).

A count shows 2 insiders buying TDG stock on the open market over the past 12 months and 5 insiders selling.
Among TransDigm insiders, Michael Lisman (President & CEO) led open-market buying over the past 12 months with $3.84 million of purchases (2.9K shares); the latest was on February 6, 2026.
On the selling side, Kevin M. Stein (Director) was the top open-market seller of TransDigm over the past 12 months, with $186.47 million sold (133.56K shares) and the latest sale on February 2, 2026.
The latest open-market trade in TDG stock by an insider was a sale of 3.9K shares for $4.27 million by Joel Reiss (Co-Chief Operating Officer) on September 15, 2026.
Apart from open-market trades, TDG insiders received 533 shares in stock awards, acquired 262.55K shares through option exercises and conversions and gave away 340 shares as gifts in the past 12 months.
Per Business Quant data, TransDigm insiders hold 702.26K shares in total based on their latest Form 4 filings, up 0.07% from 701.8K shares at the end of Q2 2026 and down 9.09% from 772.5K shares at the end of Q3 2025.
By type of ownership, TDG insiders hold 15.13% of their shares directly (106.23K shares) and 84.87% indirectly (596.03K shares).
TDG's insider total is spread across 17 insiders who have filed a Form 4 in the past two years.
TDG's largest insider holders by reported holdings are Robert J. Small (Director, 500.2K shares), W. Nicholas Howley (Director, 53.48K shares) and Kevin M. Stein (Director, 34.2K shares).
Of the shares held by TDG insiders, 71.23% belong to Robert J. Small.
Institutions held 93.20% of TransDigm's outstanding shares in their Q2 2026 13F filings, insiders about 1.22% based on their latest Form 4 filings, and other investors, including the public, the remaining 5.58%.
In the past year, 16 insiders of TransDigm submitted 82 Form 4 filings reporting trades, awards or other transactions.
These insider figures for TransDigm are based on Form 4 filings through September 21, 2026.

Form 4 Holdings

Insiders Holding TDG

Insiders 20

Shares held 283.71K

Of outstanding 0.494%

#	Insider	Position	Direct	Indirect	Total	Share of Insiders	Last Filed
1	Raymond F Laubenthal	President And Coo	156,595	0	156,595	55.2%	29 Mar, 2022
2	Sean P Hennessy	Director	33,836	0	33,836	11.9%	21 Sep, 2026
3	David Barr	Director	32,225	0	32,225	11.4%	21 Sep, 2026
4	Kevin M Stein	President Ceo	0	19,233	19,233	6.8%	03 Feb, 2026
5	Iii Jorge L. Valladares	Coo	11,085	0	11,085	3.9%	26 Mar, 2025
6	Robert J Small	Director	5,677	0	5,677	2.0%	21 Sep, 2026
7	Sarah Wynne	Chief Financial Officer	4,894	0	4,894	1.7%	06 Feb, 2026
8	Peter Palmer	Executive Vice President	4,064	0	4,064	1.4%	21 Sep, 2026
9	Joel Reiss	Co Chief Operating Officer	3,600	0	3,600	1.3%	16 Oct, 2026
10	Michael Lisman	President Ceo	3,259	0	3,259	1.1%	09 Feb, 2026
11	Patrick Joseph Murphy	Co Chief Operating Officer	2,515	0	2,515	0.9%	25 Feb, 2026
12	Michael Graff	Director	1,717	0	1,717	0.6%	21 Sep, 2026
13	Mervin Dunn	Director	1,562	0	1,562	0.6%	18 Nov, 2022
14	Gary E Mccullough	Director	993	0	993	0.4%	21 Sep, 2026
15	Michele Santana	Director	805	0	805	0.3%	21 Sep, 2026
16	Jane M. Cronin	Director	734	0	734	0.3%	21 Sep, 2026
17	Jessica L Warren	Gc, Cco, Secretary	575	0	575	0.2%	13 May, 2025
18	W Nicholas Howley	Chief Executive Officer	239	0	239	0.1%	21 Sep, 2026
19	John Staer	Director	91	0	91	0.0%	14 Mar, 2023
20	Irina Igorevna Krasik	Director	13	0	13	0.0%	21 Sep, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

10,267 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
15 Oct, 2026	Joel Reiss	Co Chief Operating Officer	Acquired M	4,100	$284.97	$1.17Mn	7,700	Direct
15 Oct, 2026	Joel Reiss	Co Chief Operating Officer	Disposed S	20	$1,112.27	$22.25K	7,680	Direct
15 Oct, 2026	Joel Reiss	Co Chief Operating Officer	Disposed S	100	$1,113.58	$111.36K	7,580	Direct
15 Oct, 2026	Joel Reiss	Co Chief Operating Officer	Disposed S	100	$1,114.82	$111.48K	7,480	Direct
15 Oct, 2026	Joel Reiss	Co Chief Operating Officer	Disposed S	50	$1,116.02	$55.80K	7,430	Direct
15 Oct, 2026	Joel Reiss	Co Chief Operating Officer	Disposed S	60	$1,117.11	$67.03K	7,370	Direct
15 Oct, 2026	Joel Reiss	Co Chief Operating Officer	Disposed S	100	$1,119.01	$111.90K	7,270	Direct
15 Oct, 2026	Joel Reiss	Co Chief Operating Officer	Disposed S	30	$1,120.30	$33.61K	7,240	Direct
15 Oct, 2026	Joel Reiss	Co Chief Operating Officer	Disposed S	60	$1,121.58	$67.29K	7,180	Direct
15 Oct, 2026	Joel Reiss	Co Chief Operating Officer	Disposed S	131	$1,123.09	$147.12K	7,049	Direct
15 Oct, 2026	Joel Reiss	Co Chief Operating Officer	Disposed S	306	$1,124.00	$343.94K	6,743	Direct
15 Oct, 2026	Joel Reiss	Co Chief Operating Officer	Disposed S	600	$1,125.00	$675.00K	6,143	Direct
15 Oct, 2026	Joel Reiss	Co Chief Operating Officer	Disposed S	278	$1,125.86	$312.99K	5,865	Direct
15 Oct, 2026	Joel Reiss	Co Chief Operating Officer	Disposed S	305	$1,127.01	$343.74K	5,560	Direct
15 Oct, 2026	Joel Reiss	Co Chief Operating Officer	Disposed S	120	$1,127.90	$135.35K	5,440	Direct
15 Oct, 2026	Joel Reiss	Co Chief Operating Officer	Disposed S	150	$1,129.38	$169.41K	5,290	Direct
15 Oct, 2026	Joel Reiss	Co Chief Operating Officer	Disposed S	100	$1,130.06	$113.01K	5,190	Direct
15 Oct, 2026	Joel Reiss	Co Chief Operating Officer	Disposed S	130	$1,131.33	$147.07K	5,060	Direct
15 Oct, 2026	Joel Reiss	Co Chief Operating Officer	Disposed S	210	$1,132.30	$237.78K	4,850	Direct
15 Oct, 2026	Joel Reiss	Co Chief Operating Officer	Disposed S	317	$1,133.89	$359.44K	4,533	Direct

Showing 1 to 20 of 10,267 transactions