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sellWeak cluster of 210b5-1 plan

W Nicholas Howley sold $13M of TDG

director at TransDigm Group INC. 10,132 shares at an average of $1,236.28, traded Aug 18, 2026, filed Aug 19, 2026.

Warning score
23
Value
$13M
10,132 shares
Holdings after
21,548
-32% from before
From 52-week low
+9%
low $1,132.88, close $1,233.78
From 52-week high
-15%
high $1,450.00, as of Aug 18, 2026

Score components

  • Role
    Director
    +15
  • Trade size
    $12.5M at market
    +25
  • Share of holdings sold
    Sold 32% of holdings
    +10
  • Cluster
    2 insiders selling within 14 days
    +8
  • 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 13, 2026 · close 1,112
Since filing Aug 19, 2026: -9.0%SPY +1.4% · excess -10.5%

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 0001352573-26-000013, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Aug 18, 2026MOption exercise
Common Stockindirect: W. Nicholas Howley Family Trust u/a/d 4/23/9910b5-1
+10,132$66.47$673k31,680Aug 19, 2026
Aug 18, 2026SOpen-market sale
Common Stockindirect: W. Nicholas Howley Family Trust u/a/d 4/23/9910b5-1
-204$1,225.60$250k31,476Aug 19, 2026
Aug 18, 2026SOpen-market sale
Common Stockindirect: W. Nicholas Howley Family Trust u/a/d 4/23/9910b5-1
-70$1,227.62$86k31,406Aug 19, 2026
Aug 18, 2026SOpen-market sale
Common Stockindirect: W. Nicholas Howley Family Trust u/a/d 4/23/9910b5-1
-290$1,229.09$356k31,116Aug 19, 2026
Aug 18, 2026SOpen-market sale
Common Stockindirect: W. Nicholas Howley Family Trust u/a/d 4/23/9910b5-1
-570$1,230.02$701k30,546Aug 19, 2026
Aug 18, 2026SOpen-market sale
Common Stockindirect: W. Nicholas Howley Family Trust u/a/d 4/23/9910b5-1
-830$1,231.12$1.0M29,716Aug 19, 2026
Aug 18, 2026SOpen-market sale
Common Stockindirect: W. Nicholas Howley Family Trust u/a/d 4/23/9910b5-1
-1,055$1,232.01$1.3M28,661Aug 19, 2026
Aug 18, 2026SOpen-market sale
Common Stockindirect: W. Nicholas Howley Family Trust u/a/d 4/23/9910b5-1
-450$1,233.30$555k28,211Aug 19, 2026
Aug 18, 2026SOpen-market sale
Common Stockindirect: W. Nicholas Howley Family Trust u/a/d 4/23/9910b5-1
-270$1,234.69$333k27,941Aug 19, 2026
Aug 18, 2026SOpen-market sale
Common Stockindirect: W. Nicholas Howley Family Trust u/a/d 4/23/9910b5-1
-140$1,236.12$173k27,801Aug 19, 2026
Aug 18, 2026SOpen-market sale
Common Stockindirect: W. Nicholas Howley Family Trust u/a/d 4/23/9910b5-1
-250$1,236.89$309k27,551Aug 19, 2026
Aug 18, 2026SOpen-market sale
Common Stockindirect: W. Nicholas Howley Family Trust u/a/d 4/23/9910b5-1
-520$1,238.08$644k27,031Aug 19, 2026
Aug 18, 2026SOpen-market sale
Common Stockindirect: W. Nicholas Howley Family Trust u/a/d 4/23/9910b5-1
-3,980$1,239.17$4.9M23,051Aug 19, 2026
Aug 18, 2026SOpen-market sale
Common Stockindirect: W. Nicholas Howley Family Trust u/a/d 4/23/9910b5-1
-1,313$1,240.42$1.6M21,738Aug 19, 2026
Aug 18, 2026SOpen-market sale
Common Stockindirect: W. Nicholas Howley Family Trust u/a/d 4/23/9910b5-1
-190$1,241.14$236k21,548Aug 19, 2026
Aug 18, 2026MOption exercise
Stock Optionderivativeindirect: W. Nicholas Howley Family Trust u/a/d 4/23/9910b5-1
-10,132$0.00$01,700Aug 19, 2026

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%
38Weak
TDGsell 210b5-1
TransDigm Group INC
Joel Reiss
Co-Chief Operating Officer
$4.8M
3,900 shares
-52%
23Weak
TDGsell 210b5-1
TransDigm Group INC
W Nicholas Howley
director
$12M
10,132 shares
-32%
28Weak
TDGsell 210b5-1
TransDigm Group INC
Joel Reiss
Co-Chief Operating Officer
$4.2M
3,486 shares
-46%
31Weak
TDGsell 210b5-1
TransDigm Group INC
Joel Reiss
Co-Chief Operating Officer
$510k
414 shares
-10%
43Moderate
TDGsell 2
TransDigm Group INC
W Nicholas Howley
director
$13M
10,132 shares
-32%
43Moderate
TDGsell 2
TransDigm Group INC
W Nicholas Howley
director
$13M
10,132 shares
-32%
43Moderate
TDGsell 2
TransDigm Group INC
W Nicholas Howley
director
$13M
10,132 shares
-32%
58Moderate
TDGsell 2
TransDigm Group INC
Joel Reiss
Co-Chief Operating Officer
$5.0M
3,900 shares
-52%
23Weak
TDGsell 210b5-1
TransDigm Group INC
W Nicholas Howley
director
$12M
10,132 shares
-32%

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.

W Nicholas Howley sold $13M of TDG | InsiderTell