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BIIB
Biogen Inc. Common Stock
stock NASDAQ

At Close

Jul 29, 2026 3:59:59 PM EDT

209.35USD+1.817%(+3.74)2,399,767

0.00Bid 0.00Ask 0.00Spread

Pre-market

Jul 29, 2026 9:28:30 AM EDT

211.00USD+2.621%(+5.39)3,076

After-hours

Jul 29, 2026 4:39:30 PM EDT

209.23USD-0.055%(-0.12)104

OverviewOptionsHistoricalDark Pool PrintsShortsMore

BIIB Volume Jul 29, 2026

[NF]

Exchange	Day%	Volume	30D%
Off Exchange¹	52.47	1,079,042	44.02
Nasdaq GSM	19.81	407,385	37.56
IEX	9.58	197,089	5.44
NYSE Arca	6.75	138,773	4.39
Cboe BZX	4.23	86,902	2.89
Cboe EDGX	2.24	46,139	1.48
NYSE	1.40	28,876	1.07
Cboe BYX	0.77	15,877	0.63
MEMX	0.74	15,188	0.77
MIAX Pearl	0.55	11,381	0.20
Cboe EDGA	0.42	8,684	0.28
Nasdaq PHLX	0.35	7,272	0.12
Nasdaq BX	0.32	6,682	0.44
NYSE National	0.22	4,595	0.27
NYSE American	0.11	2,160	0.09
24X National	0.01	139	0.01
Texas Stock Exchange LLC	0.01	122	0.00
CHX	0.01	109	0.35
LTSE	0.00	0	0.00

chartexchange.com

¹ A) Dark Pool or Off Exchange? B) Venues explained. C) All trades that update volume from the CTA.

BIIB Nutrition Facts

1.46 servings per container

Serving size

1.40M

Calories

2.06M

% Day

% Avg

Off Exchange¹ 1M

52.47%

44.02%

Nasdaq GSM 407K

19.81%

37.56%

IEX 197K

9.58%

5.44%

NYSE Arca 139K

6.75%

4.39%

Cboe BZX 87K

4.23%

2.89%

Cboe EDGX 46K

2.24%

1.48%

NYSE 29K

1.40%

1.07%

Cboe BYX 16K

0.77%

0.63%

MEMX 15K

0.74%

0.77%

MIAX Pearl 11K

0.55%

0.20%

Cboe EDGA 9K

0.42%

0.28%

Nasdaq PHLX 7K

0.35%

0.12%

Nasdaq BX 7K

0.32%

0.44%

NYSE National 5K

0.22%

0.27%

NYSE American 2K

0.11%

0.09%

24X National 139

0.01%

Texas Stock Exchange LLC 122

0.01%

0.00%

CHX 109

0.01%

0.35%

LTSE 0

0.00%

¹ A) Dark Pool or Off Exchange? B) Venues explained. C) All trades that update volume from the CTA.

chartexchange.com

BIIB Off Exchange & Dark Pool Summary

Today's Off Exchange & Dark Pool volume is 1,079,042, which is 52.47% of today's total volume.
Today's Lit volume is 977,373, which is 47.53%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 44.02%.
The average Lit volume has been 55.98%.

BIIB Volume by Exchange

Off Exchange

Nasdaq GSM

IEX

NYSE Arca

Cboe BZX

Cboe EDGX

NYSE

Cboe BYX

MEMX

MIAX Pearl

Cboe EDGA