Skip to content
sellWeak cluster of 710b5-1 plan

Martina Flammer M.D. sold $4.1M of INSM

Chief Medical Officer at INSMED Inc. 45,163 shares at an average of $91.16, traded Jun 10, 2025, filed Jun 12, 2025.

Warning score
30
Value
$4.1M
45,163 shares
Holdings after
83,111
-41% from before
From 52-week low
+40%
low $64.81, close $90.93
From 52-week high
0%
high $90.93, as of Jun 10, 2025

Score components

  • Role
    Officer
    +15
  • Trade size
    $4.1M at market
    +25
  • Share of holdings sold
    Sold 41% of holdings
    +10
  • Cluster
    7 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.

This signal so far: 1m +1.3%, 3m +50.5%, 6m +101.5%.

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 9, 2026 · close 100.60
Since filing Jun 12, 2025: +3.8%SPY +31.1% · excess -27.3%

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 0001628280-25-030972, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Jun 10, 2025MOption exercise
Common Stock10b5-1
+25,740$26.46$681k108,851Jun 12, 2025
Jun 10, 2025SOpen-market sale
Common Stock10b5-1
-25,740$88.64$2.3M83,111Jun 12, 2025
Jun 11, 2025MOption exercise
Common Stock10b5-1
+19,423$17.07$332k102,534Jun 12, 2025
Jun 11, 2025SOpen-market sale
Common Stock10b5-1
-19,423$94.50$1.8M83,111Jun 12, 2025
Jun 10, 2025MOption exercise
Stock Option (right to buy)derivative10b5-1
-25,740$0.00$017,160Jun 12, 2025
Jun 11, 2025MOption exercise
Stock Option (right to buy)derivative10b5-1
-19,423$0.00$064,744Jun 12, 2025

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%
65Notable
INSMsell 3
INSMED Inc
Roger Adsett
Chief Operating Officer
$32M
239,850 shares
-71%
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%

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.

Martina Flammer M.D. sold $4.1M of INSM | InsiderTell