sellWeak cluster of 210b5-1 plan
Kevin M Stein sold $53M of TDG
President & CEO at TransDigm Group INC. 36,925 shares at an average of $1,425.79, traded Feb 2, 2026, filed Feb 3, 2026.
Warning score
33Value
$53M
36,925 shares
Holdings after
19,233
-66% from before
From 52-week low
+25%
low $1,152.50, close $1,435.52
From 52-week high
-5%
high $1,516.55, as of Feb 2, 2026
Score components
- +15RoleDirector
- +25Trade size$52.6M at market
- +20Share of holdings soldSold 66% of holdings
- +8Cluster2 insiders selling within 14 days
- -15Exercise and sellShares came from an option exercise in the same filing
- -2010b5-1 planPre-scheduled under a 10b5-1 plan
What happened after comparable sells
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
This signal so far: 1m -0.5%, 3m -8.5%, 6m -2.1%.
Price around the trade, and since
From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.
TDGOct 9, 2026 · close 1,108
Since filing Feb 3, 2026: -14.9%SPY +13.7% · excess -28.6%
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™
Rows in this filing
Every transaction in Form 4 0001193125-26-035714, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Feb 2, 2026 | MOption exercise Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1 | +25,000 | $341.28 | $8.5M | 33,158 | Feb 3, 2026 |
| Feb 2, 2026 | MOption exercise Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1 | +23,000 | $342.31 | $7.9M | 56,158 | Feb 3, 2026 |
| Feb 2, 2026 | SOpen-market sale Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1 | -40 | $1,404.68 | $56k | 56,118 | Feb 3, 2026 |
| Feb 2, 2026 | SOpen-market sale Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1 | -218 | $1,407.76 | $307k | 55,900 | Feb 3, 2026 |
| Feb 2, 2026 | SOpen-market sale Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1 | -2 | $1,409.71 | $2,819 | 55,898 | Feb 3, 2026 |
| Feb 2, 2026 | SOpen-market sale Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1 | -6 | $1,410.98 | $8,466 | 55,892 | Feb 3, 2026 |
| Feb 2, 2026 | SOpen-market sale Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1 | -1 | $1,412.26 | $1,412 | 55,891 | Feb 3, 2026 |
| Feb 2, 2026 | SOpen-market sale Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1 | -175 | $1,414.04 | $247k | 55,716 | Feb 3, 2026 |
| Feb 2, 2026 | SOpen-market sale Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1 | -58 | $1,414.36 | $82k | 55,658 | Feb 3, 2026 |
| Feb 2, 2026 | SOpen-market sale Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1 | -52 | $1,415.63 | $74k | 55,606 | Feb 3, 2026 |
| Feb 2, 2026 | SOpen-market sale Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1 | -2 | $1,416.40 | $2,833 | 55,604 | Feb 3, 2026 |
| Feb 2, 2026 | SOpen-market sale Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1 | -48 | $1,417.44 | $68k | 55,556 | Feb 3, 2026 |
| Feb 2, 2026 | SOpen-market sale Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1 | -112 | $1,419.43 | $159k | 55,444 | Feb 3, 2026 |
| Feb 2, 2026 | SOpen-market sale Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1 | -223 | $1,420.51 | $317k | 55,221 | Feb 3, 2026 |
| Feb 2, 2026 | SOpen-market sale Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1 | -861 | $1,421.73 | $1.2M | 54,360 | Feb 3, 2026 |
| Feb 2, 2026 | SOpen-market sale Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1 | -2,141 | $1,422.48 | $3.0M | 52,219 | Feb 3, 2026 |
| Feb 2, 2026 | SOpen-market sale Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1 | -3,997 | $1,423.66 | $5.7M | 48,222 | Feb 3, 2026 |
| Feb 2, 2026 | SOpen-market sale Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1 | -4,859 | $1,424.47 | $6.9M | 43,363 | Feb 3, 2026 |
| Feb 2, 2026 | SOpen-market sale Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1 | -5,906 | $1,425.57 | $8.4M | 37,457 | Feb 3, 2026 |
| Feb 2, 2026 | SOpen-market sale Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1 | -5,665 | $1,426.61 | $8.1M | 31,792 | Feb 3, 2026 |
| Feb 2, 2026 | SOpen-market sale Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1 | -6,665 | $1,427.38 | $9.5M | 25,127 | Feb 3, 2026 |
| Feb 2, 2026 | SOpen-market sale Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1 | -2,067 | $1,428.64 | $3.0M | 23,060 | Feb 3, 2026 |
| Feb 2, 2026 | SOpen-market sale Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1 | -1,810 | $1,429.61 | $2.6M | 21,250 | Feb 3, 2026 |
| Feb 2, 2026 | SOpen-market sale Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1 | -2,017 | $1,430.26 | $2.9M | 19,233 | Feb 3, 2026 |
| Feb 2, 2026 | MOption exercise Stock Option.derivativeindirect: Fortuna Trust dated June 1, 201810b5-1 | -23,000 | $0.00 | $0 | 20,000 | Feb 3, 2026 |
| Feb 2, 2026 | MOption exercise Stock Optionderivativeindirect: Fortuna Trust dated June 1, 201810b5-1 | -25,000 | $0.00 | $0 | 17,940 | Feb 3, 2026 |
Related signals
Other insiders at TransDigm Group INC and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 30Weak | TransDigm Group INC | Joel Reiss Co-Chief Operating Officer | $4.3M 3,900 shares | -52% | |
| 23Weak | TransDigm Group INC | W Nicholas Howley director | $13M 10,132 shares | -32% | |
| 38Weak | TransDigm Group INC | Joel Reiss Co-Chief Operating Officer | $4.8M 3,900 shares | -52% | |
| 23Weak | TransDigm Group INC | W Nicholas Howley director | $12M 10,132 shares | -32% | |
| 28Weak | TransDigm Group INC | Joel Reiss Co-Chief Operating Officer | $4.2M 3,486 shares | -46% | |
| 31Weak | TransDigm Group INC | Joel Reiss Co-Chief Operating Officer | $510k 414 shares | -10% | |
| 43Moderate | TransDigm Group INC | W Nicholas Howley director | $13M 10,132 shares | -32% | |
| 43Moderate | TransDigm Group INC | W Nicholas Howley director | $13M 10,132 shares | -32% | |
| 43Moderate | TransDigm Group INC | W Nicholas Howley director | $13M 10,132 shares | -32% | |
| 58Moderate | TransDigm Group INC | Joel Reiss Co-Chief Operating Officer | $5.0M 3,900 shares | -52% |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.