BIIB
Biogen Inc.Company with tickers: BIIB
CIK
875045
CUSIP
09062X103
Shares Outstanding
147,637,117
Website
https://www.biogen.com
13F Activity (30d)
61 filings
17 filers
Weekly off-exchange (dark pool / OTC) trading volume reported to FINRA under its OTC/ATS Transparency data. ATS volume is executed on alternating trading systems (dark pools); non-ATS OTC is other over-the-counter dealer volume. The off-exchange share is total off-exchange volume as a percentage of consolidated weekly trading volume for the same Monday–Friday week.
Off-Exchange Volume History
| Week Start | ATS Volume | Non-ATS OTC Volume | Total Off-Exchange | % of FINRA Weekly Volume |
|---|---|---|---|---|
| 2026-05-25 | 942,726 | 715,153 | 1,657,879 | 38.9% |
| 2026-05-18 | 1,461,646 | 1,175,179 | 2,636,825 | 54.5% |
| 2026-05-11 | 2,575,000 | 1,310,018 | 3,885,018 | 62.7% |
| 2026-05-04 | 975,492 | 614,821 | 1,590,313 | 50.6% |
| 2026-04-27 | 2,163,525 | 708,175 | 2,871,700 | 44.3% |
| 2026-04-20 | 1,835,475 | 516,547 | 2,352,022 | 51.4% |
| 2026-04-13 | 1,803,981 | 1,004,456 | 2,808,437 | 55.9% |
| 2026-04-06 | 2,264,508 | 1,122,336 | 3,386,844 | 44.9% |
| 2026-03-30 | 2,295,125 | 737,604 | 3,032,729 | 48.5% |
| 2026-03-23 | 1,194,065 | 554,433 | 1,748,498 | 41.2% |
| 2026-03-16 | 1,073,027 | 1,012,245 | 2,085,272 | 37.0% |
| 2026-03-09 | 1,073,759 | 446,699 | 1,520,458 | 36.7% |
| 2026-03-02 | 1,100,074 | 534,338 | 1,634,412 | 37.5% |
| 2026-02-23 | 1,174,184 | 830,251 | 2,004,435 | 40.7% |
| 2026-02-16 | 1,083,262 | 333,672 | 1,416,934 | 37.0% |
| 2026-02-09 | 2,308,031 | 837,088 | 3,145,119 | 39.6% |
| 2026-02-02 | 3,405,432 | 1,327,665 | 4,733,097 | 43.4% |
| 2026-01-26 | 1,789,594 | 584,639 | 2,374,233 | 41.4% |
| 2026-01-19 | 1,349,687 | 1,043,273 | 2,392,960 | 42.9% |
| 2026-01-12 | 3,227,091 | 973,578 | 4,200,669 | 42.5% |
| 2026-01-05 | 2,698,373 | 1,274,667 | 3,973,040 | 44.4% |
| 2025-12-29 | 992,769 | 520,239 | 1,513,008 | 42.9% |
| 2025-12-22 | 1,410,467 | 434,393 | 1,844,860 | 42.8% |
| 2025-12-15 | 4,796,196 | 8,104,424 | 12,900,620 | 51.1% |
| 2025-12-08 | 3,154,210 | 1,206,713 | 4,360,923 | 45.3% |
| 2025-12-01 | 2,763,520 | 1,004,143 | 3,767,663 | 46.4% |
| 2025-11-24 | 2,714,042 | 1,476,468 | 4,190,510 | 49.0% |
| 2025-11-17 | 2,787,508 | 1,756,002 | 4,543,510 | 43.5% |
| 2025-11-10 | 3,186,689 | 1,250,031 | 4,436,720 | 44.2% |
| 2025-11-03 | 2,769,297 | 1,029,744 | 3,799,041 | 40.3% |
| 2025-10-27 | 3,400,315 | 1,100,712 | 4,501,027 | 43.7% |
| 2025-10-20 | 1,729,128 | 869,141 | 2,598,269 | 41.9% |
| 2025-10-13 | 1,817,491 | 720,588 | 2,538,079 | 40.8% |
| 2025-10-06 | 2,365,918 | 943,744 | 3,309,662 | 42.2% |
| 2025-09-29 | 3,854,839 | 1,500,075 | 5,354,914 | 42.9% |
| 2025-09-22 | 1,995,923 | 924,230 | 2,920,153 | 43.0% |
| 2025-09-15 | 2,549,553 | 1,643,547 | 4,193,100 | 41.4% |
| 2025-09-08 | 2,391,168 | 1,031,476 | 3,422,644 | 43.2% |
| 2025-09-01 | 1,992,135 | 1,478,861 | 3,470,996 | 44.3% |
| 2025-08-25 | 1,588,476 | 1,049,527 | 2,638,003 | 40.7% |
| 2025-08-18 | 1,912,700 | 913,459 | 2,826,159 | 41.4% |
| 2025-08-11 | 1,801,092 | 845,972 | 2,647,064 | 40.3% |
| 2025-08-04 | 2,286,830 | 1,054,559 | 3,341,389 | 42.4% |
| 2025-07-28 | 2,808,933 | 1,883,147 | 4,692,080 | 46.5% |
| 2025-07-21 | 1,642,693 | 694,817 | 2,337,510 | 38.3% |
| 2025-07-14 | 1,637,817 | 786,561 | 2,424,378 | 40.9% |
| 2025-07-07 | 2,005,584 | 783,232 | 2,788,816 | 45.7% |
| 2025-06-30 | 1,411,436 | 763,615 | 2,175,051 | 41.7% |
| 2025-06-23 | 1,343,563 | 783,786 | 2,127,349 | 41.0% |
Showing 1–49 of 49 weeks