SEC Form 4Coverage since Aug 15, 2025Open-market trades only
$TDG insider trading
Over the last 12 months, TransDigm Group insiders reported 3 buys totaling $3.8M and 43 sales totaling $489.8M across SEC Form 4 filings. 78% of those filings were made under pre-arranged 10b5-1 trading plans.
- Bought · 12m
- $3.8M 3 events
- Sold · 12m
- $489.8M 43 events
- Events · 12m
- 46 Form 4 filings, grouped
- Insiders · 12m
- 6 distinct reporters
- 10b5-1 share
- 78% of events, not dollars
Side
Price · $TDG · 3Mvia TradingView
Top insiders · 12m
Reiss JoelCo-Chief Operating Officer12× · $53.0M
Stein Kevin M—12× · $186.5M
Howley W Nicholas—11× · $114.1M
Murphy Patrick JosephCo-Chief Operating Officer5× · $2.4M
SMALL ROBERT J—4× · $133.9M
All insider trades
49 events
Scroll the table sideways for price, value and marks.
| Date | Insider | Type | Shares | Avg price | Value | Δ stake | Marks |
|---|---|---|---|---|---|---|---|
| Aug 18, 2026 | Howley W NicholasD | ▼ Sale | 10,132 | $1236.28 | $12.5M | -32% | plan · 14 tranches · indirect |
| Aug 17, 2026 | Reiss JoelCo-Chief Operating Officer · O | ▼ Sale | 3,900 | $1238.76 | $4.8M | -52% | plan · 19 tranches |
| Jul 20, 2026 | Howley W NicholasD | ▼ Sale | 10,132 | $1216.08 | $12.3M | -32% | plan · 12 tranches · indirect |
| Jul 15, 2026 | Reiss JoelCo-Chief Operating Officer · O | ▼ Sale | 414 | $1231.11 | $510K | -10.3% | plan · 4 tranches |
| Jul 15, 2026 | Reiss JoelCo-Chief Operating Officer · O | ▼ Sale | 3,486 | $1216.21 | $4.2M | -46.5% | plan · 29 tranches |
| Jun 18, 2026 | Howley W NicholasD | ▼ Sale | 10,132 | $1319.55 | $13.4M | -32% | 22 tranches · indirect |
| Jun 18, 2026 | Howley W NicholasD | ▼ Sale | 10,132 | $1319.55 | $13.4M | -32% | 22 tranches · indirect |
| Jun 18, 2026 | Howley W NicholasD | ▼ Sale | 10,132 | $1319.55 | $13.4M | -32% | 22 tranches · indirect |
| Jun 15, 2026 | Reiss JoelCo-Chief Operating Officer · O | ▼ Sale | 3,900 | $1276.78 | $5.0M | -52% | 18 tranches |
| Apr 20, 2026 | Howley W NicholasD | ▼ Sale | 10,132 | $1265.06 | $12.8M | -32% | plan · 11 tranches · indirect |
| Apr 15, 2026 | Reiss JoelCo-Chief Operating Officer · O | ▼ Sale | 3,900 | $1280.46 | $5.0M | -52% | plan · 17 tranches |
| Mar 18, 2026 | Howley W NicholasD | ▼ Sale | 10,132 | $1213.05 | $12.3M | -32% | plan · 23 tranches · indirect |
| Mar 16, 2026 | Reiss JoelCo-Chief Operating Officer · O | ▼ Sale | 3,900 | $1243.7 | $4.9M | -52% | plan · 19 tranches |
| Feb 25, 2026 | SMALL ROBERT JD | ▲ Buy | 1 | $1285 | $1K | — | indirect |
| Feb 18, 2026 | Howley W NicholasD | ▼ Sale | 10,168 | $1307.68 | $13.3M | -32.1% | plan · 13 tranches · indirect |
| Feb 17, 2026 | Reiss JoelCo-Chief Operating Officer · O | ▼ Sale | 3,900 | $1293.88 | $5.0M | -52% | plan · 23 tranches |
| Feb 6, 2026 | Lisman MichaelPresident & CEO · O·D | ▲ Buy | 950 | $1284.26 | $1.2M | +41.1% | — |
| Feb 2, 2026 | Stein Kevin MD | ▼ Sale | 11,075 | $1434.49 | $15.9M | -57.6% | plan · 10 tranches · indirect |
| Feb 2, 2026 | Stein Kevin MD | ▼ Sale | 36,925 | $1425.79 | $52.6M | -65.8% | plan · 22 tranches · indirect |
| Feb 2, 2026 | Murphy Patrick JosephCo-Chief Operating Officer · O | ▼ Sale | 290 | $1430.1 | $415K | -21.6% | plan |
| Jan 15, 2026 | Reiss JoelCo-Chief Operating Officer · O | ▼ Sale | 3,900 | $1429.92 | $5.6M | -52% | plan · 18 tranches |
| Jan 14, 2026 | Stein Kevin MD | ▼ Sale | 7,627 | $1406.38 | $10.7M | -48.3% | plan · 3 tranches · indirect |
| Jan 8, 2026 | Stein Kevin MD | ▼ Sale | 17,373 | $1407.25 | $24.4M | -68% | plan · 7 tranches · indirect |
| Jan 5, 2026 | Stein Kevin MD | ▼ Sale | 25,000 | $1373.59 | $34.3M | -75.4% | plan · 21 tranches · indirect |
| Jan 2, 2026 | Murphy Patrick JosephCo-Chief Operating Officer · O | ▼ Sale | 290 | $1329.03 | $385K | -21.6% | plan |
| Dec 15, 2025 | Reiss JoelCo-Chief Operating Officer · O | ▼ Sale | 3,900 | $1290.52 | $5.0M | -52% | plan · 26 tranches |
| Dec 10, 2025 | SMALL ROBERT JD | ▼ Sale | 4,700 | $1290.19 | $6.1M | -45.5% | 3 tranches |
| Dec 9, 2025 | SMALL ROBERT JD | ▼ Sale | 90,953 | $1335.72 | $121.5M | -57.2% | 2 tranches · indirect |
| Dec 4, 2025 | Stein Kevin MD | ▼ Sale | 17,526 | $1362.29 | $23.9M | -68.2% | plan · 8 tranches · indirect |
| Dec 1, 2025 | Murphy Patrick JosephCo-Chief Operating Officer · O | ▼ Sale | 290 | $1351.06 | $392K | -21.6% | plan |
| Nov 28, 2025 | Stein Kevin MD | ▼ Sale | 4,592 | $1360.73 | $6.2M | -36% | plan · 3 tranches · indirect |
| Nov 26, 2025 | Stein Kevin MD | ▼ Sale | 4,217 | $1360.57 | $5.7M | -34.1% | plan · 3 tranches · indirect |
| Nov 21, 2025 | Stein Kevin MD | ▼ Sale | 230 | $1360.31 | $313K | -2.7% | plan · indirect |
| Nov 20, 2025 | Stein Kevin MD | ▼ Sale | 1,104 | $1360.89 | $1.5M | -11.9% | plan · 3 tranches · indirect |
| Nov 18, 2025 | Stein Kevin MD | ▼ Sale | 7,191 | $1361.57 | $9.8M | -46.8% | plan · 5 tranches · indirect |
| Nov 17, 2025 | Reiss JoelCo-Chief Operating Officer · O | ▼ Sale | 3,900 | $1340 | $5.2M | -52% | plan · 25 tranches |
| Nov 17, 2025 | Howley W NicholasD | ▼ Sale | 2,736 | $1334.92 | $3.7M | -11.3% | plan · 14 tranches · indirect |
| Nov 14, 2025 | Lisman MichaelPresident & CEO · O·D | ▲ Buy | 1,954 | $1339.14 | $2.6M | — | 6 tranches · indirect |
| Nov 3, 2025 | Murphy Patrick JosephCo-Chief Operating Officer · O | ▼ Sale | 290 | $1310 | $380K | -21.6% | plan |
| Oct 27, 2025 | Stein Kevin MD | ▼ Sale | 700 | $1360 | $952K | -7.9% | plan · indirect |
| Oct 27, 2025 | Murphy Patrick JosephCo-Chief Operating Officer · O | ▼ Sale | 580 | $1354.76 | $786K | -35.5% | plan |
| Oct 20, 2025 | Reiss JoelCo-Chief Operating Officer · O | ▼ Sale | 3,000 | $1279.59 | $3.8M | -45.5% | plan · 9 tranches |
| Oct 15, 2025 | Howley W NicholasD | ▼ Sale | 2,736 | $1298.87 | $3.6M | -11.3% | plan · 11 tranches · indirect |
| Sep 22, 2025 | Reiss JoelCo-Chief Operating Officer · O | ▼ Sale | 3,000 | $1276.07 | $3.8M | -45.5% | plan · 8 tranches |
| Sep 15, 2025 | Howley W NicholasD | ▼ Sale | 2,736 | $1282.47 | $3.5M | -11.3% | plan · 11 tranches · indirect |
| Sep 12, 2025 | SMALL ROBERT JD | ▼ Sale | 5,000 | $1276.98 | $6.4M | -5.7% | 14 tranches · indirect |
| Aug 26, 2025 | Graff MichaelD | ▼ Sale | 1,760 | $1402.1 | $2.5M | -47.3% | 5 tranches |
| Aug 20, 2025 | Reiss JoelCo-Chief Operating Officer · O | ▼ Sale | 3,000 | $1406.07 | $4.2M | -45.5% | plan · 11 tranches |
| Aug 15, 2025 | Howley W NicholasD | ▼ Sale | 2,736 | $1397.22 | $3.8M | -11.3% | plan · 12 tranches · indirect |
Every $TDG filing on this page is one API call away
The same Form 4 data over REST or MCP, already grouped into events with the plan flag and the dollar value read. A free key does 100 calls a day and needs no card. Prefer email? TransDigm Group filings can reach your inbox instead.
About Form 4
Corporate insiders — officers, directors and 10%+ owners — must report their trades to the SEC on Form 4 within two business days. This page shows open-market activity: purchases (code P), sales (S) and dispositions back to the issuer (D). Scheduled compensation events such as stock grants and option exercises are also filed on Form 4 but carry no trading signal, so they are not shown and counts here can be lower than the raw EDGAR filing total. We group each filing's transactions into one economic event (a laddered 10b5-1 sale is one event, not 25 rows), flag pre-arranged plans and late filings, and link every event to its AI-scored article in the $TDG feed.