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sellWeak10b5-1 plan

Priya Singhal sold $532k of BIIB

Head of Development at BIOGEN INC.. 2,660 shares at an average of $199.83, traded Feb 9, 2026, filed Feb 10, 2026.

Warning score
3
Value
$532k
2,660 shares
Holdings after
8,043
-25% from before
From 52-week low
+71%
low $113.38, close $193.81
From 52-week high
-4%
high $201.18, as of Feb 9, 2026

Score components

  • Role
    Officer
    +15
  • Trade size
    $532k at market
    +18
  • Share of holdings sold
    Sold 25% of holdings
    +5
  • Cluster
    No other insider selling within 14 days
    0
  • 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 -2.2%, 3m +5.5%, 6m +7.9%.

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.

BIIBOct 9, 2026 · close 225.71
Since filing Feb 10, 2026: +19.4%SPY +13.3% · excess +6.1%

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 0000875045-26-000023, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Feb 6, 2026MOption exercise
Common Stock10b5-1
+2,217$0.00$08,488Feb 10, 2026
Feb 6, 2026FTax withholding
Common Stock10b5-1
-1,056$201.18$212k7,432Feb 10, 2026
Feb 6, 2026MOption exercise
Common Stock10b5-1
+4,683$0.00$012,115Feb 10, 2026
Feb 6, 2026FTax withholding
Common Stock10b5-1
-1,412$201.18$284k10,703Feb 10, 2026
Feb 9, 2026SOpen-market sale
Common Stock10b5-1
-2,660$199.83$532k8,043Feb 10, 2026
Feb 6, 2026MOption exercise
Restricted Stock Unitderivative10b5-1
-2,217$0.00$02,217Feb 10, 2026
Feb 6, 2026MOption exercise
Restricted Stock Unitderivative10b5-1
-4,683$0.00$09,367Feb 10, 2026

Related signals

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

ScoreCompanyInsiderValueHoldingsFiled
18Weak
BIIBsell10b5-1
BIOGEN INC.
Lloyd Minor
director
$240k
1,186 shares
-31%
10Weak
BIIBbuy
BIOGEN INC.
Nicole Murphy
Head of Pharm Ops and Tech
$585
3 shares
+0%
0Weak
BIIBsell10b5-1
BIOGEN INC.
Priya Singhal
Head of Development
$134k
748 shares
-11%
0Weak
BIIBsell10b5-1
BIOGEN INC.
Priya Singhal
Head of Development
$69k
517 shares
-8%
19Weak
BIIBsell10b5-1
BIOGEN INC.
Rachid Izzar
Head of Global Product Strat.
$300k
2,223 shares
-26%
23Weak
BIIBsell10b5-1
BIOGEN INC.
Priya Singhal
Head of Development
$481k
3,806 shares
-41%
44Moderate
BIIBbuy
BIOGEN INC.
Caroline Dorsa
director
$152k
1,235 shares
+5%
30Weak
BIIBsell10b5-1
BIOGEN INC.
Stephen A Sherwin
director
$1.3M
8,760 shares
-44%
0Weak
BIIBsell10b5-1
BIOGEN INC.
Priya Singhal
Head of Development
$17k
110 shares
-2%
0Weak
BIIBsell10b5-1
BIOGEN INC.
Priya Singhal
Head of Development
$88k
431 shares
-7%

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.

Priya Singhal sold $532k of BIIB | InsiderTell