Biogen (BIIB) has a market capitalization of $34.4B, based on 147.75M shares at a price of $232.95 (up 2% today).
| DATE | CLOSE | VOLUME | OUTSTANDING | MARKET CAP |
|---|---|---|---|---|
October 2026 | $228.90 | 10,457,513 | 147,753,993 | $33,820,888,997.70 |
September 2026 | $225.88 | 21,431,600 | 148,700,000 | $33,588,356,000.00 |
August 2026 | $216.65 | 15,966,700 | 148,700,000 | $32,215,855,000.00 |
July 2026 | $202.95 | 31,695,000 | 148,700,000 | $30,178,665,000.00 |
June 2026 | $216.06 | 24,235,200 | 148,700,000 | $32,128,122,000.00 |
May 2026 | $196.00 | 22,250,400 | 148,700,000 | $29,145,200,000.00 |
April 2026 | $189.28 | 28,535,500 | 148,700,000 | $28,145,936,000.00 |
March 2026 | $183.33 | 21,907,700 | 148,400,000 | $27,206,172,000.00 |
February 2026 | $191.82 | 27,601,300 | 148,400,000 | $28,466,088,000.00 |
January 2026 | $179.89 | 31,239,300 | 148,400,000 | $26,695,676,000.00 |
December 2025 | $175.99 | 49,726,800 | 146,700,000 | $25,817,733,000.00 |
November 2025 | $182.09 | 38,477,300 | 146,700,000 | $26,712,603,000.00 |
October 2025 | $154.27 | 40,401,000 | 146,700,000 | $22,631,409,000.00 |
September 2025 | $140.08 | 35,338,600 | 147,100,000 | $20,605,768,000.00 |
August 2025 | $132.22 | 30,543,100 | 147,100,000 | $19,449,562,000.00 |
July 2025 | $128.00 | 29,438,200 | 147,100,000 | $18,828,800,000.00 |
June 2025 | $125.59 | 26,463,600 | 145,900,000 | $18,323,581,000.00 |
May 2025 | $129.79 | 37,229,900 | 145,900,000 | $18,936,361,000.00 |
April 2025 | $121.08 | 37,657,900 | 145,900,000 | $17,665,572,000.00 |
March 2025 | $136.84 | 37,147,400 | 145,900,000 | $19,964,956,000.00 |
February 2025 | $140.50 | 31,487,500 | 145,900,000 | $20,498,950,000.00 |
January 2025 | $143.93 | 25,766,600 | 145,900,000 | $20,999,387,000.00 |
December 2024 | $152.92 | 31,960,300 | 146,100,000 | $22,341,612,000.00 |
November 2024 | $160.63 | 34,751,100 | 146,100,000 | $23,468,043,000.00 |
October 2024 | $174.00 | 30,796,000 | 146,100,000 | $25,421,400,000.00 |