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sellNotable cluster of 3

Roger Adsett sold $32M of INSM

Chief Operating Officer at INSMED Inc. 239,850 shares at an average of $133.27, traded Aug 10, 2026, filed Aug 12, 2026.

Warning score
65
Value
$32M
239,850 shares
Holdings after
98,744
-71% from before
From 52-week low
+47%
low $91.88, close $134.75
From 52-week high
-36%
high $211.41, as of Aug 10, 2026

Score components

  • Role
    COO
    +20
  • Trade size
    $32.0M at market
    +25
  • Share of holdings sold
    Sold 71% of holdings
    +20
  • Cluster
    3 insiders selling within 14 days
    +15
  • Exercise and sell
    Shares came from an option exercise in the same filing
    -15

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.

INSMOct 12, 2026 · close 98.56
Since filing Aug 12, 2026: -25.5%SPY +1.0% · excess -26.5%

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 0001685904-26-000014, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Aug 10, 2026MOption exercise
Common Stock
+82,280$13.67$1.1M181,024Aug 12, 2026
Aug 10, 2026MOption exercise
Common Stock
+76,600$17.16$1.3M257,624Aug 12, 2026
Aug 10, 2026MOption exercise
Common Stock
+80,970$30.46$2.5M338,594Aug 12, 2026
Aug 10, 2026SOpen-market sale
Common Stock
-239,850$133.27$32M98,744Aug 12, 2026
Aug 10, 2026MOption exercise
Stock Option (right to buy)derivative
-82,280$0.00$00Aug 12, 2026
Aug 10, 2026MOption exercise
Stock Option (right to buy)derivative
-76,600$0.00$00Aug 12, 2026
Aug 10, 2026MOption exercise
Stock Option (right to buy)derivative
-80,970$0.00$00Aug 12, 2026

Related signals

Other insiders at INSMED Inc and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
50Moderate
INSMsell
INSMED Inc
David R Brennan
director
$3.1M
25,000 shares
-39%
70Notable
INSMsell 3
INSMED Inc
Melvin Sharoky Md
director
$638k
5,000 shares
-100%
30Weak
INSMsell 410b5-1
INSMED Inc
Martina Flammer M.D.
Chief Medical Officer
$3.5M
27,173 shares
-31%
23Weak
INSMsell 210b5-1
INSMED Inc
William Lewis
Chair and CEO
$1.1M
10,700 shares
-4%
23Weak
INSMsell 210b5-1
INSMED Inc
William Lewis
Chair and CEO
$1.3M
10,699 shares
-4%
25Weak
INSMsell 310b5-1
INSMED Inc
Martina Flammer M.D.
Chief Medical Officer
$1.4M
12,302 shares
-17%
30Weak
INSMsell 310b5-1
INSMED Inc
William Lewis
Chair and CEO
$2.2M
21,398 shares
-8%
21Weak
INSMsell 310b5-1
INSMED Inc
Michael Alexander Smith
Chief Legal Officer
$173k
1,806 shares
-5%
40Moderate
INSMsell 510b5-1
INSMED Inc
William Lewis
Chair and CEO
$613k
6,515 shares
-2%
48Moderate
INSMsell 5
INSMED Inc
Roger Adsett
Chief Operating Officer
$242k
2,370 shares
-2%

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.

Roger Adsett sold $32M of INSM | InsiderTell