Biogen Stock (BIIB)
Showing Closing Date Range from May 17 to Nov 13, 2026 compared to Nov 17, 2025 to May 16, 2026.
Compare Last 6 Months with Previous Period
Investor Relations:biogen.com
Current Period Close
$253.40
May 17, 2026 - Nov 13, 2026
Previous Period Close
$192.95
Nov 17, 2025 - May 16, 2026
Net Comparison Delta
+$60.45 (+31.33%)
Relative performance vs prior benchmark
Historical Quotes & Breakdown(125 dates)
| Current Date | Current Close | Previous Date | Previous Close | Delta (%) |
|---|---|---|---|---|
| Nov 13, 2026 | $253.40 | - | - | - |
| Nov 12, 2026 | $250.48 | May 15, 2026 | $192.95 | +29.82% |
| Nov 11, 2026 | $253.40 | May 14, 2026 | $191.37 | +32.41% |
| Nov 10, 2026 | $253.25 | May 13, 2026 | $204.53 | +23.82% |
| Nov 09, 2026 | $254.87 | May 12, 2026 | $199.36 | +27.84% |
| Nov 06, 2026 | $248.35 | May 11, 2026 | $197.95 | +25.46% |
| Nov 05, 2026 | $243.93 | May 08, 2026 | $193.45 | +26.09% |
| Nov 04, 2026 | $254.46 | May 07, 2026 | $191.38 | +32.96% |
| Nov 03, 2026 | $248.93 | May 06, 2026 | $190.68 | +30.55% |
| Nov 02, 2026 | $249.01 | May 05, 2026 | $189.13 | +31.66% |
| Oct 30, 2026 | $253.62 | May 04, 2026 | $187.21 | +35.47% |
| Oct 29, 2026 | $249.65 | May 01, 2026 | $187.06 | +33.46% |
| Oct 28, 2026 | $244.05 | Apr 30, 2026 | $189.28 | +28.94% |
| Oct 27, 2026 | $252.73 | Apr 29, 2026 | $194.38 | +30.02% |
| Oct 26, 2026 | $252.26 | Apr 28, 2026 | $183.38 | +37.56% |
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