Market Cap for Biogen (BIIB)
According to Biogen's latest reported financial statements, the company's latest reported market cap is $25.82B USD. Market capitalization is the total dollar value of all outstanding shares — shares outstanding × stock price — and the standard measure of a company's equity value. On this page, historical market cap snaps filing-period share counts to closing prices on or before each statement date (not intraday tick data).
Headline figure above is from the reporting period ending (reported ). Chart and table below cover the full reported history back to .
BIIB
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Latest period
$25.82B
YoY change
+10.4%
5Y CAGR
-4.5%
Peak year (2014)
$80.51B
Latest annual
$28.52B
Market Cap history chart for Biogen (BIIB) from 1991 to 2026
Market Cap history table for Biogen (BIIB) from 1991 to 2026
| Fiscal year | Period ended | Reported | Market Cap | YoY |
|---|---|---|---|---|
| 2026 | $28.52B | +10.4% | ||
| 2025 | $25.82B | +15.7% | ||
| 2024 | $22.31B | -40.8% | ||
| 2023 | $37.68B | -6.8% | ||
| 2022 | $40.43B | +12.6% | ||
| 2021 | $35.89B | -9.1% | ||
| 2020 | $39.50B | -29.0% | ||
| 2019 | $55.61B | -10.0% | ||
| 2018 | $61.78B | -9.0% | ||
| 2017 | $67.86B | +9.4% | ||
| 2016 | $62.05B | -12.4% | ||
| 2015 | $70.83B | -12.0% | ||
| 2014 | $80.51B | +20.8% | ||
| 2013 | $66.62B | +89.9% | ||
| 2012 | $35.09B | +30.1% | ||
| 2011 | $26.97B | +57.8% | ||
| 2010 | $17.09B | +10.3% | ||
| 2009 | $15.49B | +10.2% | ||
| 2008 | $14.05B | -22.9% | ||
| 2007 | $18.22B | +7.3% | ||
| 2006 | $16.98B | +8.4% | ||
| 2005 | $15.67B | -31.5% | ||
| 2004 | $22.88B | +86.8% | ||
| 2003 | $12.25B | -7.4% | ||
| 2002 | $13.23B | -51.9% | ||
| 2001 | $27.49B | -6.2% | ||
| 2000 | $29.31B | +89.0% | ||
| 1999 | $15.50B | +109.3% | ||
| 1998 | $7.41B | +39.5% | ||
| 1997 | $5.31B | +45.3% | ||
| 1996 | $3.65B | +59.4% | ||
| 1995 | $2.29B | +692.8% | ||
| 1994 | $289.00M | -62.8% | ||
| 1993 | $776.25M | -37.5% | ||
| 1992 | $1.24B | -15.1% | ||
| 1991 | $1.46B | — |
Market Cap values are taken from Biogen's reported income statements (10-Q quarterly and 10-K annual filings with the U.S. Securities and Exchange Commission). Each row shows the period end date and the date the filing was reported; YoY compares each figure to the same period one year earlier. Amounts are in USD as filed.
Analysis
As of the 2026 fiscal year, Biogen (BIIB) reported market cap of $28.52B – grew 10.4% year-over-year.
Biogen market cap has grown for 2 consecutive years, with a -4.5% compound annual growth rate over 2021–2026 (5 years).
Between 2014 and 2026, Biogen market cap plunged 64.6%, falling from $80.51B to $28.52B.
The highest annual market cap of $80.51B was reported in 2014. The lowest in the available history was $289.00M in 1994.
Biogen (BIIB) sits 9th of 8 Healthcare peers we track on this metric, against a peer median of $311.16B.
Biogen Market Cap by Year
Biogen Market Cap 2026: $28.52B
Biogen market cap in 2026 was $28.52B, grew 10.4% from 2025.
Biogen Market Cap 2025: $25.82B
Biogen market cap in 2025 was $25.82B, grew 15.7% from 2024.
Biogen Market Cap 2024: $22.31B
Biogen market cap in 2024 was $22.31B, plunged 40.8% below 2023.
Biogen Market Cap 2023: $37.68B
Biogen market cap in 2023 was $37.68B, declined 6.8% below 2022.
Biogen Market Cap 2022: $40.43B
Biogen market cap in 2022 was $40.43B.
See more financial history for Biogen (BIIB).
Sector peers — Market Cap
Companies in the same sector as Biogen, ranked by their latest market cap.
| Company | Market Cap | Sector |
|---|---|---|
| Eli Lilly and Company (LLY) | $825.77B | Healthcare |
| Johnson & Johnson (JNJ) | $548.34B | Healthcare |
| AbbVie Inc. (ABBV) | $349.67B | Healthcare |
| UnitedHealth Group Incorporated (UNH) | $332.91B | Healthcare |
| AstraZeneca PLC (AZN) | $289.41B | Healthcare |
| Merck & Co., Inc. (MRK) | $272.11B | Healthcare |
| Amgen Inc. (AMGN) | $183.05B | Healthcare |
| Novo Nordisk A/S (NVO) | $182.96B | Healthcare |
Frequently asked questions
What is Biogen's market cap?
- Latest reported market cap for Biogen (BIIB) is $25.82B (period ending December 31, 2025).
How has Biogen market cap changed year-over-year?
- Biogen (BIIB) market cap changed +10.4% year-over-year on the latest annual filing.
What is the long-term growth rate of Biogen market cap?
- Biogen (BIIB) market cap compound annual growth rate is -4.5% over the most recent 5 years available.
When did Biogen market cap hit its highest annual value?
- Biogen market cap reached its highest annual value of $80.51B in 2014.
What was Biogen market cap in 2025?
- Biogen (BIIB) market cap in 2025 was $25.82B.
What was Biogen market cap in 2026?
- Biogen (BIIB) market cap in 2026 was $28.52B.
Metrics overview
Pick a metric for charts, filings, and peers — each row shows the latest TTM or annual value with year-over-year change.
Explore more
BIIB Overview
Company profile, financial tools, and key metrics
BIIB Revenue Counter
Earns $311.09 every second. See per minute, hour, and day.
BIIB Earnings Counter
Earns $41.01 per second net profit. See per minute, hour, and day.
BIIB Economic Scale
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BIIB What If Invested
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BIIB How It Makes Money
Discover visual breakdown of $9.81B in revenue — where it comes from and where it goes.
BIIB Stock Seasonality
Best and worst months to invest. Historical monthly returns heatmap.
BIIB Price Target Scenarios
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BIIB Daily Price Character
Explosive · 48.1% historical win rate (green days). Streaks & record days.
BIIB Buybacks
Recent repurchase activity. Shareholder yield & SBC comparison.
BIIB Stock Split History
2 splits on record. Dates, ratios, and cumulative multiple.