Biogen Stock (BIIB)
Compare Last 6 Months Same Dates of Previous Year
Current Period Close
$220.83
Mar 08, 2026 - Sep 04, 2026
Previous Year Close
$139.94
Mar 08, 2025 - Sep 04, 2025
Net Comparison Delta
+$80.89 (+57.80%)
Relative performance vs prior benchmark
Historical Quotes & Breakdown(126 dates)
| Current Date | Current Close | Previous Date | Previous Close | Delta (%) |
|---|---|---|---|---|
| Mar 09, 2026 | $188.24 | Mar 10, 2025 | $150.71 | +24.90% |
| Mar 10, 2026 | $188.41 | Mar 11, 2025 | $143.66 | +31.15% |
| Mar 11, 2026 | $190.48 | Mar 12, 2025 | $140.19 | +35.87% |
| Mar 12, 2026 | $184.90 | Mar 13, 2025 | $139.98 | +32.09% |
| Mar 13, 2026 | $181.55 | Mar 14, 2025 | $139.44 | +30.20% |
| Mar 16, 2026 | $183.26 | Mar 17, 2025 | $143.54 | +27.67% |
| Mar 17, 2026 | $185.29 | Mar 18, 2025 | $143.09 | +29.49% |
| Mar 18, 2026 | $182.31 | Mar 19, 2025 | $141.43 | +28.90% |
| Mar 19, 2026 | $183.41 | Mar 20, 2025 | $141.38 | +29.73% |
| Mar 20, 2026 | $181.46 | Mar 21, 2025 | $140.90 | +28.79% |
| Mar 23, 2026 | $183.64 | Mar 24, 2025 | $141.60 | +29.69% |
| Mar 24, 2026 | $183.94 | Mar 25, 2025 | $139.16 | +32.18% |
| Mar 25, 2026 | $189.18 | Mar 26, 2025 | $142.43 | +32.82% |
| Mar 26, 2026 | $191.06 | Mar 27, 2025 | $140.33 | +36.15% |
| Mar 27, 2026 | $183.84 | Mar 28, 2025 | $138.37 | +32.86% |
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