Shares Outstanding:
146.61M+14.60K(+0.01%)Summary
- As of today (October 8, 2025), BIIB has 146.61 million outstanding stocks, with the most recent change of +14.60 thousand (+0.01%) on July 29, 2025.
- Compared to the previous year, the number of outstanding shares has increased by +914.60 thousand (+0.63%).
Performance
BIIB Shares Outstanding Chart
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Range
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BIIB Shares Outstanding Trends
| PeriodPeriod | Shares OutstandingShares Outstanding | PricePrice | Market CapMarket Cap |
|---|---|---|---|
| RecentMost recent | +0.0% | -1.2% | -1.2% |
| 1Y1 Year | +0.6% | -16.5% | -16.0% |
| 3Y3 Years | +1.8% | -41.0% | -39.9% |
| 5Y5 Years | -4.7% | -47.0% | -49.5% |
BIIB Shares Outstanding Highs & Lows
| PeriodPeriod | HighHigh | Current vs Highvs High | LowLow | Current vs Lowvs Low | |
|---|---|---|---|---|---|
| 1M | 1-Month | 146.61M | at high | 146.61M | at low |
| 3M | 3-Month | 146.61M | at high | 146.60M | +0.0% |
| 6M | 6-Month | 146.61M | at high | 146.50M | +0.1% |
| 1Y | 1-Year | 146.61M | at high | 145.70M | +0.6% |
| 3Y | 3-Year | 146.61M | at high | 144.00M | +1.8% |
| 5Y | 5-Year | 153.90M | -4.7% | 144.00M | +1.8% |
| All-Time | All-Time | 344.63M | -57.5% | 118.77M | +23.4% |
BIIB Shares Outstanding History
| Date | Value |
|---|---|
| Jul 2025 | 146.61M(+0.6%) |
| Dec 2024 | 145.72M(+0.6%) |
| Dec 2023 | 144.90M(+0.6%) |
| Dec 2022 | 144.00M(-2.0%) |
| Dec 2021 | 147.00M(-3.5%) |
| Dec 2020 | 152.40M(-12.5%) |
| Dec 2019 | 174.20M(-11.7%) |
| Dec 2018 | 197.20M(-6.8%) |
| Dec 2017 | 211.50M(-2.1%) |
| Dec 2016 | 216.00M(-1.2%) |
| Dec 2015 | 218.60M(-6.8%) |
| Dec 2014 | 234.56M(-0.7%) |
| Dec 2013 | 236.33M(-0.1%) |
| Dec 2012 | 236.58M(-2.3%) |
| Date | Value |
|---|---|
| Dec 2011 | 242.12M(+0.7%) |
| Dec 2010 | 240.54M(-12.5%) |
| Dec 2009 | 274.86M(-4.6%) |
| Dec 2008 | 288.05M(-2.6%) |
| Dec 2007 | 295.70M(-12.6%) |
| Dec 2006 | 338.17M(-0.5%) |
| Dec 2005 | 339.96M(+0.1%) |
| Apr 2004 | 339.76M(+2.8%) |
| Dec 2003 | 330.41M(+114.0%) |
| Dec 2002 | 154.39M(+1.1%) |
| Dec 2001 | 152.78M(+4.0%) |
| Dec 2000 | 146.87M(+14.7%) |
| Dec 1999 | 128.02M(+6.0%) |
| Dec 1998 | 120.73M |
FAQ
- What are outstanding stocks?
- How many outstanding stocks does Biogen Inc. have?
- What is Biogen Inc. year-on-year outstanding stocks change?
- What is the all-time highest number of outstanding stocks for Biogen Inc.?
What are outstanding stocks?
Outstanding stocks are the shares of a company that are currently owned by shareholders, including institutional investors and company insiders
How many outstanding stocks does Biogen Inc. have?
As of October 8, 2025, Biogen Inc. has 146.61M outstanding shares
What is Biogen Inc. year-on-year outstanding stocks change?
Over the past year, the number of outstanding stocks of BIIB has changed by +914.60K (+0.63%)
What is the all-time highest number of outstanding stocks for Biogen Inc.?
Biogen Inc. historical maximum number of outstanding shares is 344.63M