Biogen Inc.

BIIB · NASDAQ · S&P 500 · Drug Manufacturers - General

$252.08

+8.03 · +3.29% today

Market open · updated 12:45:29 PM ET

Oct 29, 2026 +3.42%

High
$255.26 9:55 AM
Low
$243.34 4:25 AM

Against the S&P 500 Price change through Oct 28, 2026

This year

BIIB+38.67%

S&P 500+13.26%

1 year

BIIB+63.65%

S&P 500+12.41%

3 years

BIIB+4.06%

S&P 500+88.06%

5 years

BIIB−7.86%

S&P 500+68.51%

Key numbers

Previous close
$244.05
Open
$247.92
Day's range
$246.48 – $255.55
52-week range
$138.00 – $258.78
Volume
370,905
Average volume
1.2 million
Market value
$37.2 billion
Price to earnings
1.6last 12 months
Earnings per share
$2.36last 12 months
Beta
0.17moves less than the market
Dividend
None
50-day average
$225.73
200-day average
$200.40

Analyst price targets and the full financials are in the terminal.

Who Biogen buys from and competes with From our value chain

Biogen in the news

Congress trades in BIIB

5 purchases and 3 sales in the latest 8 filings.

MemberTradeAmountTradedDisclosed
Ro KhannaHouse · D-CaliforniaSale$1,001 - $15,000Sep 11, 2026Oct 9, 2026
Ro KhannaHouse · D-CaliforniaPurchase$1,001 - $15,000Sep 4, 2026Oct 9, 2026
Kevin HernHouse · R-OklahomaSale$1,001 - $15,000Aug 18, 2026Sep 2, 2026
Gilbert CisnerosHouse · D-CaliforniaPurchase$1,001 - $15,000Jun 5, 2026Jul 3, 2026
Gilbert CisnerosHouse · D-CaliforniaPurchase$1,001 - $15,000Jan 30, 2026Feb 16, 2026
Ro KhannaHouse · D-CaliforniaPurchase$1,001 - $15,000Aug 26, 2025Sep 12, 2025
Rob BresnahanHousePurchase$1,001 - $15,000May 15, 2025Jun 10, 2025
Rob BresnahanHouseSale$1,001 - $15,000Apr 8, 2025May 8, 2025

Source: Periodic transaction reports filed with the House and the Senate · Members disclose ranges, not exact amounts, and may file weeks after the trade.

About Biogen

Biogen Inc. is a leading biotechnology firm dedicated to the discovery, development, production, and distribution of treatments for complex neurological and neurodegenerative conditions. Its established portfolio includes a range of medications addressing multiple sclerosis (MS), such as TECFIDERA, VUMERITY, AVONEX, PLEGRIDY, TYSABRI, and FAMPYRA.

Sector
Healthcare
Industry
Drug Manufacturers - General
Employees
7,500
Headquarters
Cambridge, Massachusetts
Website
biogen.com
Listed
Sep 17, 1991

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