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CLOSED · 15:00 ET
Market Clerk
Sun Sep 6 · markets closed2 signals today321 insider buys this week · $404MCIRO short report next: Sep 15The week ahead

BIIB

BIOGEN INC.
NASDAQ · HEALTH CARE · BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
220.83
−3.68 −1.64%
USD · close Sep 4
MKT CAP $32.6BP/E 23.7DIV YIELD FCF YIELD 7.43%REV TTM $9.9B +1.2%NET INCOME $1.4B −7.3%NET DEBT $3.4B52W 135.67 – 224.51SEC XBRL · TTM TO Invalid Date

One year, everything drawn on

251 SESSIONS · DAILY CLOSES
232197163129Aug 18 · Kevin Hern sellJun 5 · Gilbert Cisneros buyJun 2 · Maria Salazar sellMay 12 · Maria Salazar buyMay 11 · Maria Salazar buyMay 11 · Maria Salazar buyMar 27 · Alan Armstrong buyJan 30 · Gilbert Cisneros buyApr 29 · 10-Q filed (Q1 2026)Feb 6 · 10-K filed (FY 2025)Feb 6 · 10-K filed (Q4 2025)Oct 30 · 10-Q filed (Q3 2025)Apr 29 · 10-Q filed (Q1 2025)Feb 6 · 10-K filed (FY 2024)Feb 6 · 10-K filed (Q4 2024)Oct 30 · 10-Q filed (Q3 2024)Feb 6 · 10-K filed (FY 2023)Feb 6 · 10-K filed (Q4 2023)SEP 2025OCTJAN 2026APRJUL
Insider buyInsider sellCongress buy, above the lineCongress sell, below10-K / 10-Q filedHOVER A MARKER FOR THE FILING
THE WORK ORDER · 2026-09-06
Shorts (latest report): 5.2M short · −263K last period
Every line of the math
63WATCH

Congress is trading it

ALL 8
TradedMemberTypeAmount
Aug 18Kevin Hern R·OKSell$1K–$15K
Jun 5Gilbert Cisneros D·CABuy$1K–$15K
Jun 2Maria Salazar R·FLSell$15K+
May 12Maria Salazar R·FLBuy$1K–$15K
May 11Maria Salazar R·FLBuy$50K+
May 11Maria Salazar R·FLBuy$1K–$15K

Insider activity

No open-market insider filings on BIIB.
Watch BIIB. Know when insiders buy.
One email the day a filing lands. Free.