Market Cap Chart

View Market Cap for BIIB.
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270.00
255.00
240.00
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Historical Market Cap Data

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Date Value
August 21, 2026 32.02B
August 20, 2026 31.66B
August 19, 2026 32.72B
August 18, 2026 31.39B
August 17, 2026 30.89B
August 14, 2026 30.99B
August 13, 2026 31.11B
August 12, 2026 30.85B
August 11, 2026 30.11B
August 10, 2026 30.59B
August 07, 2026 30.71B
August 06, 2026 30.47B
August 05, 2026 30.52B
August 04, 2026 30.79B
August 03, 2026 29.81B
July 31, 2026 29.98B
July 30, 2026 30.71B
July 29, 2026 30.90B
July 28, 2026 30.37B
July 27, 2026 29.56B
July 24, 2026 29.86B
July 23, 2026 29.61B
July 22, 2026 29.19B
July 21, 2026 29.99B
July 20, 2026 29.51B
Date Value
July 17, 2026 30.40B
July 16, 2026 30.84B
July 15, 2026 29.11B
July 14, 2026 28.33B
July 13, 2026 30.85B
July 10, 2026 29.39B
July 09, 2026 29.36B
July 08, 2026 29.57B
July 07, 2026 30.36B
July 06, 2026 30.77B
July 02, 2026 31.90B
July 01, 2026 30.96B
June 30, 2026 31.89B
June 29, 2026 31.97B
June 26, 2026 31.89B
June 25, 2026 29.81B
June 24, 2026 29.46B
June 23, 2026 29.11B
June 22, 2026 29.48B
June 18, 2026 29.02B
June 17, 2026 29.32B
June 16, 2026 28.87B
June 15, 2026 29.32B
June 12, 2026 29.53B
June 11, 2026 29.51B

Market Capitalization Definition

Market Capitalization measures the total value of a company based on their stock price multiplied by the shares outstanding. This metric is important because it gives you an idea of the size of a company, and how the size has changed over time. When studying companies from a relative basis, it would make sense to compare companies that have a similar market capitalization because factors like market share, economies of scale, and business models would also be similar.

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Market Cap Range, Past 5 Years

View Market Cap Range, Past 5 Years
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Market Cap Benchmarks

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