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 9 disclosed filings on Paydirt over the trailing twelve months from 4 members of Congress and 2 corporate insiders: 4 purchases and 5 sales, 1 filed past the deadline. Filers took a median of 14 days from execution to disclosure, and the most recent trade was executed Aug 18 and filed Sep 1. The most active filer was Rob Bresnahan with 3 filings.

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Filings, ttm

4 buys · 5 sells · 1 late

Traders, ttm

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

Aug 18

Filed Sep 1

ADViAverage daily dollar volume

$258.1M

market data

Share price · 12M

$212 (+51.1%)

Adjusted for splits and dividends.

Volume by month

Buys $283K Sells $3.0M

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

Who filed

Rob Bresnahan Representative (Joint) 3 filings PS

Priya Singhal Head of Development 3 filings GC

Gilbert Cisneros Representative 2 filings MS

Maria Elvira Salazar Representative (Spouse) 2 filings AA

Alan Armstrong Senator (Joint) 1 filing KH

Kevin Hern Representative (Joint) 1 filing CD

Caroline Dorsa Director 1 filing RI

Rachid Izzar Head of Global Product Strat. 1 filing

Recent filings

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