BIIB	The short sale volume percent (not short interest) for stock ticker BIIB is 62% on Jan 21, 2026. The short sale volume is 331,657. The total volume is 534,321. The short sale volume percent is up 11% compare to Jan 20, 2026.

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Insider Buying

The Volume and short volume are limited. It is not including all volumes from all Market.
Date	Short Volume	Total Volume	Percent
2026-01-21	331,657	534,321	62%
2026-01-20	241,868	471,288	51%
2026-01-16	349,828	605,919	58%
2026-01-15	317,069	615,331	52%
2026-01-14	965,844	1,721,683	56%
2026-01-13	349,789	636,936	55%
2026-01-12	278,136	408,551	68%
2026-01-09	356,857	561,205	64%
2026-01-08	302,839	572,208	53%
2026-01-07	499,320	886,319	56%

Last 5 days short percent	55.88%
Last 10 days short percent	56.93%
Last 20 days short percent	55.11%
Last 50 days short percent	58.86%

Related Stock Ticker
Date	Ticker	Short Volume	Total Volume	Percent
2026-01-21	ABBV	982,918	5,102,820	19%
2026-01-21	AMGN	1,294,598	1,662,969	78%
2026-01-21	BIO	51,250	173,755	29%
2026-01-21	GILD	1,582,892	2,707,162	58%
2026-01-21	JNJ	2,951,532	5,699,167	52%
2026-01-21	PFE	8,519,233	23,358,408	36%
2026-01-21	SGMO	912,222	2,297,241	40%
2026-01-21	SNY	512,990	1,429,504	36%
2026-01-21	XLV	2,420,462	3,532,036	69%