As of November 13, 2026, Biogen had a market cap of $37.45 billion, which increased by 1.16% compared to the previous trading day. Market capitalization, often referred to as market cap, represents the total value of a company's outstanding shares on the stock market and is a common measure of its overall size and valuation.
Data updated: Nov 13, 2026, 4:00 PM ET
Biogen Inc. (BIIB)
🌍 United States📈 NASDAQ🏭 Health Care🏢 Biotechnology
Note: Each point on the chart represents the market capitalization at the end of the trading day. Source: Data compiled from
EDGAR filings,
Bloomberg
and Yahoo Finance.
📈 Biogen Market Cap History by Year and Month
Biogen Market Cap History by Year and Month
Year / Month
Market Cap
% Change
2026
$37.45B
▲ 45.04%
$37.45B
▼ 0.11%
$37.49B
▲ 12.38%
$33.36B
▲ 4.25%
$32B
▲ 6.74%
$29.98B
▼ 5.99%
$31.89B
▲ 10.19%
$28.94B
▲ 3.58%
$27.94B
▲ 3.83%
$26.91B
▼ 4.40%
$28.15B
▲ 6.67%
$26.39B
▲ 2.21%
2025
$25.82B
▲ 15.87%
$25.82B
▼ 3.33%
$26.71B
▲ 18.03%
$22.63B
▲ 10.18%
$20.54B
▲ 5.93%
$19.39B
▲ 3.30%
$18.77B
▲ 2.01%
$18.4B
▼ 3.26%
$19.02B
▲ 7.22%
$17.74B
▼ 11.52%
$20.05B
▼ 2.53%
$20.57B
▼ 1.91%
$20.97B
▼ 5.89%
2024
$22.284B
▼ 40.57%
$22.284B
▼ 4.80%
$23.407B
▼ 7.68%
$25.355B
▼ 10.22%
$28.242B
▼ 5.31%
$29.825B
▼ 3.96%
$31.055B
▼ 7.99%
$33.753B
▲ 3.06%
$32.751B
▲ 4.71%
$31.278B
▼ 0.21%
$31.344B
▼ 0.63%
$31.542B
▼ 11.75%
$35.741B
▼ 4.68%
2023
$37.496B
▼ 5.97%
$37.496B
▲ 10.55%
$33.918B
▼ 1.46%
$34.42B
▼ 7.52%
$37.22B
▼ 3.87%
$38.719B
▼ 1.05%
$39.129B
▼ 5.13%
$41.246B
▼ 3.86%
$42.902B
▼ 2.57%
$44.034B
▲ 9.38%
$40.259B
▲ 3.25%
$38.992B
▼ 6.92%
$41.89B
▲ 5.05%
2022
$39.876B
▲ 13.07%
$39.876B
▼ 9.26%
$43.944B
▲ 7.67%
$40.815B
▲ 6.16%
$38.448B
▲ 35.61%
$28.352B
▼ 9.15%
$31.207B
▲ 5.39%
$29.612B
▲ 1.10%
$29.29B
▼ 4.05%
$30.525B
▼ 1.73%
$31.064B
▲ 0.17%
$31.01B
▼ 6.66%
$33.222B
▼ 5.80%
2021
$35.268B
▼ 5.49%
$35.268B
▲ 1.85%
$34.628B
▼ 11.60%
$39.173B
▼ 5.77%
$41.571B
▼ 17.69%
$50.508B
▲ 3.73%
$48.693B
▼ 5.69%
$51.629B
▲ 28.21%
$40.269B
▲ 0.06%
$40.247B
▼ 4.47%
$42.13B
▲ 1.35%
$41.571B
▼ 3.48%
$43.07B
▲ 15.42%
2020
$37.317B
▼ 27.81%
$37.317B
▲ 0.97%
$36.957B
▼ 4.72%
$38.789B
▼ 11.15%
$43.658B
▼ 4.12%
$45.536B
▲ 4.71%
$43.486B
▲ 2.68%
$42.353B
▼ 15.49%
$50.114B
▲ 3.46%
$48.44B
▼ 8.48%
$52.93B
▼ 1.39%
$53.678B
▲ 14.61%
$46.834B
▼ 9.40%
2019
$51.69B
▼ 12.89%
$51.69B
▼ 4.45%
$54.098B
▲ 0.37%
$53.899B
▲ 27.27%
$42.35B
▲ 4.48%
$40.533B
▼ 7.60%
$43.866B
▼ 3.26%
$45.345B
▲ 6.65%
$42.518B
▼ 4.34%
$44.447B
▼ 4.41%
$46.498B
▼ 27.94%
$64.523B
▼ 1.97%
$65.821B
▲ 10.92%
2018
$59.341B
▼ 11.92%
$59.341B
▼ 11.74%
$67.238B
▲ 9.68%
$61.304B
▼ 13.86%
$71.171B
▼ 0.05%
$71.207B
▲ 5.72%
$67.355B
▲ 9.98%
$61.244B
▼ 1.27%
$62.028B
▲ 7.44%
$57.732B
▼ 0.34%
$57.929B
▼ 5.25%
$61.139B
▼ 16.91%
$73.583B
▲ 9.22%
2017
$67.371B
▲ 18.55%
$67.371B
▼ 1.12%
$68.133B
▲ 3.37%
$65.91B
▼ 0.44%
$66.203B
▼ 1.09%
$66.93B
▲ 9.31%
$61.228B
▲ 6.37%
$57.561B
▲ 9.52%
$52.557B
▼ 8.64%
$57.529B
▼ 1.68%
$58.512B
▼ 6.12%
$62.323B
▲ 13.01%
$55.146B
▼ 2.96%
2016
$56.831B
▼ 7.87%
$56.831B
▼ 3.57%
$58.933B
▲ 4.96%
$56.149B
▼ 11.13%
$63.179B
▲ 2.42%
$61.686B
▲ 5.42%
$58.517B
▲ 19.93%
$48.791B
▼ 16.54%
$58.458B
▲ 5.36%
$55.484B
▲ 5.82%
$52.433B
▲ 0.35%
$52.252B
▼ 5.00%
$54.999B
▼ 10.84%
2015
$61.684B
▼ 15.89%
$61.684B
▲ 4.73%
$58.896B
▼ 1.26%
$59.646B
▼ 5.64%
$63.211B
▼ 1.85%
$64.4B
▼ 6.74%
$69.053B
▼ 21.10%
$87.522B
▲ 1.75%
$86.016B
▲ 6.17%
$81.02B
▼ 11.21%
$91.246B
▲ 3.09%
$88.512B
▲ 5.25%
$84.097B
▲ 14.67%
2014
$73.339B
▲ 20.51%
$73.339B
▲ 9.57%
$66.931B
▼ 4.17%
$69.844B
▼ 2.93%
$71.954B
▼ 3.57%
$74.614B
▲ 2.59%
$72.733B
▲ 5.58%
$68.891B
▼ 1.27%
$69.778B
▲ 11.23%
$62.731B
▼ 5.81%
$66.6B
▼ 10.22%
$74.179B
▲ 8.97%
$68.074B
▲ 11.86%
2013
$60.858B
▲ 90.80%
$60.858B
▼ 3.87%
$63.307B
▲ 19.16%
$53.129B
▲ 0.80%
$52.707B
▲ 13.02%
$46.634B
▼ 2.34%
$47.753B
▲ 1.49%
$47.052B
▼ 9.39%
$51.925B
▲ 8.48%
$47.867B
▲ 14.17%
$41.926B
▲ 15.80%
$36.206B
▲ 6.57%
$33.973B
▲ 6.51%
2012
$31.896B
▲ 29.53%
$31.896B
▼ 1.83%
$32.492B
▲ 7.87%
$30.12B
▼ 7.27%
$32.483B
▲ 1.79%
$31.913B
▲ 0.52%
$31.748B
▼ 0.35%
$31.859B
▲ 10.42%
$28.851B
▼ 2.43%
$29.571B
▲ 6.73%
$27.707B
▲ 8.18%
$25.611B
▼ 1.25%
$25.937B
▲ 5.33%
2011
$24.624B
▲ 65.76%
$24.624B
▼ 4.26%
$25.721B
▼ 1.21%
$26.036B
▲ 25.11%
$20.811B
▼ 1.11%
$21.046B
▼ 7.53%
$22.759B
▼ 4.36%
$23.797B
▲ 12.87%
$21.084B
▼ 2.99%
$21.734B
▲ 33.31%
$16.303B
▲ 7.41%
$15.178B
▲ 4.48%
$14.528B
▼ 2.21%
2010
$14.856B
▲ 9.68%
$14.856B
▲ 5.80%
$14.041B
▲ 2.01%
$13.765B
▲ 10.07%
$12.505B
▲ 4.31%
$11.988B
▼ 3.72%
$12.452B
▲ 6.70%
$11.67B
▲ 0.04%
$11.665B
▼ 11.00%
$13.106B
▼ 8.04%
$14.252B
▲ 4.33%
$13.661B
▲ 0.40%
$13.606B
▲ 0.45%
2009
$13.545B
▲ 7.18%
$13.545B
▲ 8.32%
$12.504B
▲ 11.42%
$11.223B
▼ 16.51%
$13.442B
▲ 0.64%
$13.357B
▲ 5.57%
$12.652B
▲ 5.43%
$12.001B
▼ 12.82%
$13.765B
▲ 7.14%
$12.848B
▼ 7.77%
$13.931B
▲ 10.52%
$12.606B
▼ 2.34%
$12.908B
▲ 2.14%
2008
$12.637B
▼ 18.49%
$12.637B
▲ 11.15%
$11.37B
▼ 0.56%
$11.435B
▼ 15.39%
$13.514B
▼ 0.75%
$13.616B
▼ 26.99%
$18.65B
▲ 24.82%
$14.942B
▼ 11.77%
$16.936B
▲ 3.39%
$16.38B
▼ 1.62%
$16.65B
▲ 4.03%
$16.006B
▼ 3.59%
$16.601B
▲ 7.08%
2007
$15.503B
▲ 1.49%
$15.503B
▼ 22.60%
$20.029B
▼ 0.43%
$20.115B
▼ 3.78%
$20.905B
▲ 3.93%
$20.114B
▲ 12.88%
$17.819B
▲ 5.68%
$16.861B
▲ 2.45%
$16.458B
▲ 10.61%
$14.879B
▲ 6.29%
$13.998B
▼ 1.79%
$14.254B
▼ 5.34%
$15.057B
▼ 1.42%
2006
$15.275B
▲ 7.91%
$15.275B
▼ 5.87%
$16.228B
▲ 9.79%
$14.781B
▲ 4.53%
$14.14B
▲ 1.09%
$13.988B
▲ 5.11%
$13.308B
▼ 9.22%
$14.659B
▼ 0.74%
$14.769B
▲ 3.97%
$14.205B
▼ 4.78%
$14.918B
▼ 0.39%
$14.976B
▲ 6.87%
$14.013B
▼ 1.01%
2005
$14.156B
▼ 32.09%
$14.156B
▲ 5.77%
$13.384B
▲ 5.37%
$12.702B
▲ 2.91%
$12.343B
▼ 6.02%
$13.133B
▲ 7.25%
$12.245B
▲ 14.05%
$10.736B
▼ 13.50%
$12.412B
▲ 7.89%
$11.504B
▲ 5.01%
$10.955B
▼ 9.43%
$12.096B
▼ 40.50%
$20.329B
▼ 2.48%
2004
$20.846B
N/A
$20.846B
▲ 13.51%
$18.364B
▲ 0.89%
$18.201B
▼ 4.92%
$19.143B
▲ 3.10%
$18.568B
▼ 1.12%
$18.777B
▼ 5.14%
$19.794B
▲ 1.77%
$19.45B
▲ 5.34%
$18.464B
N/A
All market cap values reflect closing prices for the period shown.
📊 Biogen Market Cap and Other Industry Peers
Below are selected companies for comparison based on industry, sub-industry, and sector:
