TDG insider buying – TransDigm Group INC
32 insider purchases since 2016 worth $752.2M by 11 different insiders. Last 12 months: 2 purchases, $3.8M. Most recent filing: 2026-02-09.
Large company Public float $76.4B (latest 10-K, SEC).
Same time range as the chart above - each mark sits under the week of the trade. Circles = purchases (height = price paid, size = amount), red triangles = open-market sales of $50k+. Prices as reported, not adjusted for later stock splits. 26 older purchases (before the 5-year window) are listed in the table below.
Purchases are open-market buys (SEC Form 4, code "P") - insiders paying with their own money. Sales are open-market sales (code "S") of $50,000 or more; many sales are pre-planned (Rule 10b5-1) or made for taxes and diversification. Each row links to the original filing.
Bought, sold, still holding?
| Insider | Bought | First / last buy | Sold since 2016 | Holds now* | Status |
|---|---|---|---|---|---|
| SMALL ROBERT J Director | $742.2M 20× · 2,202,824 sh | 2016-02-11 2022-05-23 | 24× · $1,534.8M last 2025-12-10 | 500,204 shares as of 2026-09-22 | Sold part |
| Lisman Michael CEO | $4.3M 3× · 3,754 sh | 2021-09-07 2026-02-06 | 3× · $40.4M last 2024-02-23 | 5,213 shares as of 2026-02-09 | Holds (sold earlier) |
| Laubenthal Raymond F Director | $1.8M 1× · 7,200 sh | 2016-11-30 2016-11-30 | 18× · $58.7M last 2022-03-22 | 156,595 shares as of 2022-03-29 | Sold part |
| Skulina James CEO | $1.6M 1× · 6,422 sh | 2017-05-11 2017-05-11 | 4× · $14.7M last 2019-10-10 | 4,836 shares as of 2019-10-11 | Sold part |
| HENNESSY SEAN P Director | $692,900 1× · 2,000 sh | 2020-05-08 2020-05-08 | 3× · $13.3M last 2025-05-20 | 33,836 shares as of 2026-09-21 | Sold part |
| DRIES WILLIAM Director | $425,310 1× · 1,000 sh | 2020-03-13 2020-03-13 | – | 2,316 shares as of 2020-03-23 | Holds - never sold |
| Stein Kevin M CEO | $399,776 1× · 1,347 sh | 2018-02-22 2018-02-22 | 38× · $572.1M last 2026-02-02 | 33,158 shares as of 2026-02-03 | Sold part |
| Terrion Halle Fine Officer | $298,649 1× · 523 sh | 2019-11-27 2019-11-27 | 3× · $10.2M last 2020-11-24 | 878 shares as of 2020-11-24 | Sold part |
| Graff Michael Director | $276,907 1× · 618 sh | 2020-06-12 2020-06-12 | 6× · $9.0M last 2025-08-26 | 13,813 shares as of 2026-09-21 | Sold part |
| CRONIN JANE M. Director | $190,281 1× · 300 sh | 2021-11-19 2021-11-19 | – | 734 shares as of 2026-09-21 | Holds - never sold |
| Santana Michele Director | $17,914 1× · 30 sh | 2020-02-28 2020-02-28 | – | 805 shares as of 2026-09-21 | Holds - never sold |
* Shares held after the insider's most recent SEC filing for this company (all share classes, direct and indirect). If an insider stops filing, later changes are not known.
Insider buying and selling by year
| Year | Purchases | Bought | Buyers | Sales | Sold |
|---|---|---|---|---|---|
| 2026 | 1 | $1.2M | 1 | 24 | $271.2M |
| 2025 | 1 | $2.6M | 1 | 53 | $692.1M |
| 2024 | 1 | $17,914 | 1 | 46 | $859.2M |
| 2023 | 0 | – | – | 43 | $734.0M |
| 2022 | 2 | $26.6M | 1 | 19 | $119.7M |
| 2021 | 2 | $692,794 | 2 | 24 | $202.6M |
| 2020 | 13 | $427.0M | 4 | 30 | $279.4M |
| 2019 | 2 | $100.3M | 2 | 35 | $484.8M |
| 2018 | 2 | $2.0M | 2 | 27 | $83.6M |
| 2017 | 1 | $24.5M | 1 | 16 | $52.0M |
| 2016 | 7 | $167.3M | 2 | 23 | $90.9M |
Insider purchases
| Filed | Insider | Role | Shares | Avg price | Value | Holdings | Filing |
|---|---|---|---|---|---|---|---|
| 2026-02-09 | Lisman Michael | CEO | 950 | $1,284.26 | $1.2M | +41.1% | SEC |
| 2025-11-17 | Lisman Michael | CEO | 1,954 | $1,339.14 | $2.6M | SEC | |
| 2024-05-09 | Santana Michele | Director | 30 | $597.13 | $17,914 | +4.7% | SEC |
| 2022-05-23 | SMALL ROBERT J | Director | 28,453 | $565.00 | $16.1M | +1.2% | SEC |
| 2022-05-23 | SMALL ROBERT J | Director | 19,398 | $544.09 | $10.6M | +11.7% | SEC |
| 2021-11-19 | CRONIN JANE M. | Director | 300 | $634.27 | $190,281 | +1000.0% | SEC |
| 2021-09-09 | Lisman Michael | CFO | 850 | $591.19 | $502,513 | +58.3% | SEC |
| 2020-09-16 | SMALL ROBERT J | Director | 133,310 | $507.82 | $67.7M | +5.9% | SEC |
| 2020-06-12 | Graff Michael | Director | 618 | $448.07 | $276,907 | +18.3% | SEC |
| 2020-05-13 | SMALL ROBERT J | Director | 104,921 | $319.03 | $33.5M | +4.9% | SEC |
| 2020-05-13 | SMALL ROBERT J | Director | 14,000 | $328.37 | $4.6M | +0.6% | SEC |
| 2020-05-13 | SMALL ROBERT J | Director | 139,205 | $339.26 | $47.2M | +6.9% | SEC |
| 2020-05-13 | SMALL ROBERT J | Director | 113,804 | $350.50 | $39.9M | +6.0% | SEC |
| 2020-05-08 | HENNESSY SEAN P | Director | 2,000 | $346.45 | $692,900 | +6.3% | SEC |
| 2020-03-16 | DRIES WILLIAM | Director | 1,000 | $425.31 | $425,310 | +76.0% | SEC |
| 2020-03-16 | SMALL ROBERT J | Director | 156,545 | $406.71 | $63.7M | +8.9% | SEC |
| 2020-03-16 | SMALL ROBERT J | Director | 3,031 | $425.01 | $1.3M | +0.2% | SEC |
| 2020-03-12 | SMALL ROBERT J | Director | 244,223 | $466.83 | $114.0M | +16.2% | SEC |
| 2020-03-12 | SMALL ROBERT J | Director | 59,254 | $476.26 | $28.2M | +4.2% | SEC |
| 2020-03-12 | SMALL ROBERT J | Director | 54,047 | $472.98 | $25.6M | +3.7% | SEC |
| 2019-12-12 | Terrion Halle Fine | Officer | 523 | $571.03 | $298,649 | +147.3% | SEC |
| 2019-02-22 | SMALL ROBERT J | Director | 229,940 | $434.90 | $100.0M | +7.6% | SEC |
| 2018-03-01 | Stein Kevin M | CEO | 1,347 | $296.79 | $399,776 | SEC | |
| 2018-01-18 | Skulina James | CEO | 6,422 | $243.85 | $1.6M | +28.4% | SEC |
| 2017-03-15 | SMALL ROBERT J | Director | 104,967 | $232.95 | $24.5M | +3.3% | SEC |
| 2016-12-14 | SMALL ROBERT J | Director | 91,978 | $247.22 | $22.7M | +3.0% | SEC |
| 2016-12-06 | SMALL ROBERT J | Director | 82,695 | $245.86 | $20.3M | +2.7% | SEC |
| 2016-12-01 | Laubenthal Raymond F | Director | 7,200 | $245.39 | $1.8M | +24.4% | SEC |
| 2016-03-07 | SMALL ROBERT J | Director | 41,655 | $220.85 | $9.2M | +1.4% | SEC |
| 2016-03-03 | SMALL ROBERT J | Director | 64,098 | $214.81 | $13.8M | +2.2% | SEC |
| 2016-02-17 | SMALL ROBERT J | Director | 49,910 | $202.28 | $10.1M | +1.7% | SEC |
| 2016-02-17 | SMALL ROBERT J | Director | 467,390 | $191.25 | $89.4M | +19.0% | SEC |
Insider sales
| Filed | Insider | Role | Shares | Avg price | Value | Type | Filing |
|---|---|---|---|---|---|---|---|
| 2026-09-16 | Reiss Joel | Officer | 3,900 | $1,094.58 | $4.3M | Sale | SEC |
| 2026-08-19 | Howley W Nicholas | Director | 10,132 | $1,236.27 | $12.5M | Sale | SEC |
| 2026-08-18 | Reiss Joel | Officer | 3,900 | $1,238.76 | $4.8M | Sale | SEC |
| 2026-07-21 | Howley W Nicholas | Director | 10,132 | $1,216.08 | $12.3M | Sale | SEC |
| 2026-07-17 | Reiss Joel | Officer | 3,486 | $1,216.21 | $4.2M | Sale | SEC |
| 2026-07-17 | Reiss Joel | Officer | 414 | $1,231.11 | $509,678 | Sale | SEC |
| 2026-06-22 | Howley W Nicholas | Director | 10,132 | $1,319.55 | $13.4M | Sale | SEC |
| 2026-06-16 | Reiss Joel | Officer | 3,900 | $1,276.78 | $5.0M | Sale | SEC |
| 2026-05-19 | Howley W Nicholas | Director | 10,132 | $1,180.82 | $12.0M | Sale | SEC |
| 2026-05-18 | Reiss Joel | Officer | 3,900 | $1,154.09 | $4.5M | Sale | SEC |
| 2026-04-21 | Howley W Nicholas | Director | 10,132 | $1,265.06 | $12.8M | Sale | SEC |
| 2026-04-16 | Reiss Joel | Officer | 3,900 | $1,280.46 | $5.0M | Sale | SEC |
| 2026-03-19 | Howley W Nicholas | Director | 10,132 | $1,213.05 | $12.3M | Sale | SEC |
| 2026-03-17 | Reiss Joel | Officer | 3,900 | $1,243.70 | $4.9M | Sale | SEC |
| 2026-02-20 | Howley W Nicholas | Director | 10,168 | $1,307.68 | $13.3M | Sale | SEC |
Showing the latest 15 of 340 sales of $50,000+ since 2016.
Compiled automatically from public SEC filings. Not investment advice. Get every new insider purchase in the daily report.
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