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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 30, 2026 8:57:30 AM EDT

207.16USD-1.047%(-2.19)454

After-hours

Jul 29, 2026 4:39:30 PM EDT

209.23USD-0.055%(-0.12)104

OverviewOptionsHistoricalExchange VolumeShortsMore

BIIB Volume Jul 30, 2026

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Exchange	Day%	Volume	30D%
Off Exchange¹	48.10	1,154,462	43.58
Nasdaq GSM	27.62	662,936	37.93
IEX	8.42	202,156	5.44
NYSE Arca	5.90	141,639	4.43
Cboe BZX	3.68	88,317	2.90
Cboe EDGX	1.96	47,058	1.48
NYSE	1.21	29,075	1.08
Cboe BYX	0.73	17,577	0.64
MEMX	0.64	15,282	0.78
MIAX Pearl	0.47	11,390	0.20
Cboe EDGA	0.37	8,863	0.28
Nasdaq PHLX	0.30	7,273	0.12
Nasdaq BX	0.28	6,732	0.44
NYSE National	0.19	4,595	0.27
NYSE American	0.09	2,259	0.09
24X National	0.01	139	0.01
Texas Stock Exchange LLC	0.01	122	0.00
CHX	0.00	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

1.65 servings per container

Serving size

1.46M

Calories

2.40M

% Day

% Avg

Off Exchange¹ 1M

48.10%

43.58%

Nasdaq GSM 663K

27.62%

37.93%

IEX 202K

8.42%

5.44%

NYSE Arca 142K

5.90%

4.43%

Cboe BZX 88K

3.68%

2.90%

Cboe EDGX 47K

1.96%

1.48%

NYSE 29K

1.21%

1.08%

Cboe BYX 18K

0.73%

0.64%

MEMX 15K

0.64%

0.78%

MIAX Pearl 11K

0.47%

0.20%

Cboe EDGA 9K

0.37%

0.28%

Nasdaq PHLX 7K

0.30%

0.12%

Nasdaq BX 7K

0.28%

0.44%

NYSE National 5K

0.19%

0.27%

NYSE American 2K

0.09%

24X National 139

0.01%

Texas Stock Exchange LLC 122

0.01%

0.00%

CHX 109

0.00%

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 1,154,462, which is 48.10% of today's total volume.
Today's Lit volume is 1,245,522, which is 51.90%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 43.58%.
The average Lit volume has been 56.42%.

BIIB Volume by Exchange

Off Exchange

Nasdaq GSM

IEX

NYSE Arca

Cboe BZX

Cboe EDGX

NYSE

Cboe BYX

MEMX

MIAX Pearl

Cboe EDGA