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sellModerate cluster of 410b5-1 plan

Kevin M Stein sold $24M of TDG

President & CEO at TransDigm Group INC. 17,526 shares at an average of $1,362.29, traded Dec 4, 2025, filed Dec 5, 2025.

Warning score
40
Value
$24M
17,526 shares
Holdings after
8,158
-68% from before
From 52-week low
+18%
low $1,152.50, close $1,360.10
From 52-week high
-10%
high $1,516.55, as of Dec 4, 2025

Score components

  • Role
    Director
    +15
  • Trade size
    $23.9M at market
    +25
  • Share of holdings sold
    Sold 68% of holdings
    +20
  • Cluster
    4 insiders selling within 14 days
    +15
  • Exercise and sell
    Shares came from an option exercise in the same filing
    -15
  • 10b5-1 plan
    Pre-scheduled under a 10b5-1 plan
    -20

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.

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 Dec 5, 2025: -17.7%SPY +14.8% · excess -32.5%

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 0001193125-25-309653, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Dec 4, 2025MOption exercise
Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1
+17,526$105.88$1.9M25,684Dec 5, 2025
Dec 4, 2025SOpen-market sale
Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1
-6,910$1,360.15$9.4M18,774Dec 5, 2025
Dec 4, 2025SOpen-market sale
Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1
-2,081$1,361.43$2.8M16,693Dec 5, 2025
Dec 4, 2025SOpen-market sale
Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1
-1,794$1,362.63$2.4M14,899Dec 5, 2025
Dec 4, 2025SOpen-market sale
Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1
-1,397$1,363.39$1.9M13,502Dec 5, 2025
Dec 4, 2025SOpen-market sale
Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1
-3,139$1,364.58$4.3M10,363Dec 5, 2025
Dec 4, 2025SOpen-market sale
Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1
-1,680$1,365.33$2.3M8,683Dec 5, 2025
Dec 4, 2025SOpen-market sale
Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1
-495$1,366.19$676k8,188Dec 5, 2025
Dec 4, 2025SOpen-market sale
Common Stockindirect: Fortuna Trust dated June 1, 201810b5-1
-30$1,367.22$41k8,158Dec 5, 2025
Dec 4, 2025MOption exercise
Stock Optionderivativeindirect: Fortuna Trust dated June 1, 201810b5-1
-17,526$0.00$037,940Dec 5, 2025

Related signals

Other insiders at TransDigm Group INC and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
30Weak
TDGsell10b5-1
TransDigm Group INC
Joel Reiss
Co-Chief Operating Officer
$4.3M
3,900 shares
-52%
45Moderate
TDGsell 410b5-1
TransDigm Group INC
Joel Reiss
Co-Chief Operating Officer
$5.0M
3,900 shares
-52%
50Moderate
TDGsell 4
TransDigm Group INC
Robert J Small
director
$6.1M
4,700 shares
-46%
60Notable
TDGsell 4
TransDigm Group INC
Robert J Small
director
$121M
90,953 shares
-21%
21Weak
TDGsell 510b5-1
TransDigm Group INC
Patrick Joseph Murphy
Co-Chief Operating Officer
$392k
290 shares
-22%
30Weak
TDGsell 510b5-1
TransDigm Group INC
Kevin M Stein
President & CEO
$6.2M
4,592 shares
-36%
30Weak
TDGsell 510b5-1
TransDigm Group INC
Kevin M Stein
President & CEO
$5.7M
4,217 shares
-34%
9Weak
TDGsell 410b5-1
TransDigm Group INC
Kevin M Stein
President & CEO
$313k
230 shares
-3%
25Weak
TDGsell 410b5-1
TransDigm Group INC
Kevin M Stein
President & CEO
$1.5M
1,104 shares
-12%
30Weak
TDGsell 410b5-1
TransDigm Group INC
Kevin M Stein
President & CEO
$9.8M
7,191 shares
-47%

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.

Kevin M Stein sold $24M of TDG | InsiderTell