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BIIB
Ticker

Biogen Inc.

BIIB · Healthcare · Biogen Inc. discovers, develops, manufactures, and delivers therapies in the United States, Europe, Germany, Asia, and internationally

Biogen Inc. (BIIB), in the Healthcare sector, has 10 disclosed filings on Paydirt over the trailing twelve months from 4 members of Congress and 2 corporate insiders: 4 purchases and 6 sales, 1 filed past the deadline. Filers took a median of 14 days from execution to disclosure, and the most recent trade was executed Sep 24 and filed Oct 7. The most active filer was Maria Elvira Salazar with 3 filings. Data as of Nov 7 2026.

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Filings, ttm
10
4 buys · 6 sells · 1 late
Traders, ttm
6
4 congress · 2 insiders
Volume, ttmiDollar value disclosed in the window
$1.1M
estimated for Congress, as filed for insiders
Median delay
14d
execution to disclosure
Last traded
Sep 24
Filed Oct 7
ADViAverage daily dollar volume
$258.1M
market data
Share price · 12M
$233 (+49.0%)
$233$195$156Nov 10 2025Apr 29Oct 14

Adjusted for splits and dividends.

Volume by month
$1.3M$657K$0Dec 2024Jun 2025Dec 2025Jun 2026Mar 2025 · buys $8KMar 2025 · sells $1.3MMay 2025 · buys $152KMay 2025 · sells $489KJun 2025 · buys $8KJul 2025 · sells $300KFeb 2026 · buys $8KFeb 2026 · sells $666KJun 2026 · buys $91KJul 2026 · buys $16KJul 2026 · sells $33KAug 2026 · sells $240KSep 2026 · sells $8KOct 2026 · sells $8K
Buys $283K Sells $3.1M

Estimated for Congress, as filed for insiders · by filing month · past 24 months

Who filed · past 24 months
MS Maria Elvira Salazar Representative (Spouse) 3 filings · 1 buy, 2 sales RB Rob Bresnahan Representative (Joint) 3 filings · 2 buys, 1 sale PS Priya Singhal Head of Development 3 filings · 0 buys, 3 sales GC Gilbert Cisneros Representative 2 filings · 2 buys, 0 sales AA Alan Armstrong Senator (Joint) 1 filing · 1 buy, 0 sales CD Caroline Dorsa Director 1 filing · 1 buy, 0 sales RI Rachid Izzar Head of Global Product Strat. 1 filing · 0 buys, 1 sale KH Kevin Hern Representative (Joint) 1 filing · 0 buys, 1 sale
All 10 filers LM Lloyd Minor Director 1 filing · 0 buys, 1 sale SS Stephen A Sherwin Director 1 filing · 0 buys, 1 sale
Recent filings
Maria Elvira SalazarSALE Representative $8K
$1K–15K bracket
Exec Sep 24
Filed Oct 7 Kevin HernSALE Representative $8K
$1K–15K bracket
Exec Aug 18
Filed Sep 1 Lloyd MinorSALE Director $240K
1,186 sh across 2 lots
Exec Aug 3
Filed Aug 5 · 4:03 PM ET Alan ArmstrongPURCHASE Senator $8K
$1K–15K bracket
Exec Mar 27
Filed Jul 21 † Maria Elvira SalazarSALE Representative $33K
$15K–50K bracket
Exec Jun 2
Filed Jul 7 Gilbert CisnerosPURCHASE Representative $8K
$1K–15K bracket
Exec Jun 5
Filed Jul 2 Maria Elvira SalazarPURCHASE Representative $91K
3 lots · $52K–130K bracket
Exec May 11
Filed Jun 8 Gilbert CisnerosPURCHASE Representative $8K
$1K–15K bracket
Exec Jan 30
Filed Feb 13 Priya SinghalSALE Head of Development $532K
2,660 sh × $199.83
Exec Feb 9
Filed Feb 10 · 5:30 PM ET Priya SinghalSALE Head of Development $134K
748 sh × $179.30
Exec Feb 2
Filed Feb 3 · 5:30 PM ET Rachid IzzarSALE Head of Global Product Strat. $300K
2,223 sh × $135.00
Exec Jul 8 2025
Filed Jul 16 2025 · 5:30 PM ET † Rob BresnahanPURCHASE Representative $8K
$1K–15K bracket
Exec May 15 2025
Filed Jun 9 2025 Priya SinghalSALE Head of Development $481K
3,806 sh × $126.25
Exec May 19 2025
Filed May 20 2025 · 5:30 PM ET Rob BresnahanSALE Representative $8K
$1K–15K bracket
Exec Apr 8 2025
Filed May 8 2025 Caroline DorsaPURCHASE Director $152K
1,235 sh × $122.72
Exec May 2 2025
Filed May 5 2025 · 5:30 PM ET Rob BresnahanPURCHASE Representative $8K
$1K–15K bracket
Exec Feb 25 2025
Filed Mar 27 2025 Stephen A SherwinSALE Director $1.3M
8,760 sh × $150.02
Exec Mar 7 2025
Filed Mar 10 2025 · 5:30 PM ET