BIIB · Biogen Inc. · Off Exchange

$253.40 +2.92 (+1.17%) At close · Nov 13 Play latest call Q3 2026 earnings call transcript

S&P 500 member Russell 1000 member Rebalance outlook locked

Market Cap

$37.46B

147.82M

Volume · Nov 13 1.03M Avg daily vol (3M) 1.07M

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.

1M 3M 6M 1Y 5Y All

Off-Exchange Volume History

Week Start	ATS Volume	Non-ATS OTC Volume	Total Off-Exchange	% of FINRA Weekly Volume
2026-10-05	1,718,029	627,106	2,345,135	43.3%
2026-09-28	2,411,764	815,377	3,227,141	49.0%
2026-09-21	1,561,694	810,929	2,372,623	42.9%
2026-09-14	1,046,752	633,291	1,680,043	30.7%
2026-09-07	1,091,821	384,375	1,476,196	44.4%
2026-08-31	1,043,616	751,161	1,794,777	46.0%
2026-08-24	753,288	449,970	1,203,258	42.9%
2026-08-17	1,074,780	383,720	1,458,500	39.1%
2026-08-10	1,177,987	383,153	1,561,140	40.6%
2026-08-03	1,451,061	731,610	2,182,671	45.9%
2026-07-27	2,430,443	831,564	3,262,007	46.9%
2026-07-20	1,100,898	570,657	1,671,555	40.9%
2026-07-13	3,693,068	1,471,727	5,164,795	45.9%
2026-07-06	2,218,141	965,067	3,183,208	44.7%
2026-06-29	1,347,971	657,585	2,005,556	43.0%
2026-06-22	1,899,101	1,330,136	3,229,237	41.5%
2026-06-15	1,027,245	816,461	1,843,706	39.0%
2026-06-08	1,487,279	604,436	2,091,715	42.5%
2026-06-01	1,140,917	771,445	1,912,362	43.2%
2026-05-25	942,726	715,153	1,657,879	38.7%
2026-05-18	1,461,646	1,175,179	2,636,825	48.9%
2026-05-11	2,575,000	1,310,018	3,885,018	47.1%
2026-05-04	975,492	614,821	1,590,313	43.9%
2026-04-27	2,163,525	708,175	2,871,700	40.8%
2026-04-20	1,835,475	516,547	2,352,022	43.4%
2026-04-13	1,803,981	1,004,456	2,808,437	44.4%
2026-04-06	2,264,508	1,122,336	3,386,844	43.9%
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%

Showing 1–47 of 47 weeks

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