Dark

BIIB
Biogen Inc. Common Stock
stock NASDAQ

At Close

Mar 13, 2026 3:59:59 PM EDT

181.51USD-1.833%(-3.39)1,092,302

0.00Bid 0.00Ask 0.00Spread

Pre-market

Mar 12, 2026 8:46:30 AM EDT

189.00USD+2.217%(+4.10)0

After-hours

Mar 13, 2026 4:07:30 PM EDT

181.53USD+0.011%(+0.02)23,979

OverviewOptionsHistoricalExchange VolumeShortsMore

BIIB Volume Mar 16, 2026

[NF]

Exchange	Day%	Volume	30D%
Nasdaq GSM	45.12	492,824	40.28
Off Exchange¹	39.24	428,581	40.03
IEX	4.53	49,520	5.05
Cboe BZX	3.01	32,878	4.31
NYSE Arca	2.57	28,070	3.67
Cboe EDGX	1.18	12,867	1.98
NYSE	0.87	9,511	1.34
NYSE National	0.68	7,458	0.21
Cboe BYX	0.68	7,431	0.42
MEMX	0.50	5,445	0.83
Nasdaq BX	0.49	5,377	0.49
NYSE American	0.42	4,617	0.06
Nasdaq PHLX	0.28	3,014	0.20
Cboe EDGA	0.27	2,932	0.42
MIAX Pearl	0.11	1,227	0.24
CHX	0.04	399	0.46

chartexchange.com

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

BIIB Nutrition Facts

0.87 servings per container

Serving size

1.25M

Calories

1.09M

% Day

% Avg

Nasdaq GSM 493K

45.12%

40.28%

Off Exchange¹ 429K

39.24%

40.03%

IEX 50K

4.53%

5.05%

Cboe BZX 33K

3.01%

4.31%

NYSE Arca 28K

2.57%

3.67%

Cboe EDGX 13K

1.18%

1.98%

NYSE 10K

0.87%

1.34%

NYSE National 7K

0.68%

0.21%

Cboe BYX 7K

0.68%

0.42%

MEMX 5K

0.50%

0.83%

Nasdaq BX 5K

0.49%

NYSE American 5K

0.42%

0.06%

Nasdaq PHLX 3K

0.28%

0.20%

Cboe EDGA 3K

0.27%

0.42%

MIAX Pearl 1K

0.11%

0.24%

CHX 399

0.04%

0.46%

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 428,581, which is 39.24% of today's total volume.
Today's Lit volume is 663,570, which is 60.76%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 40.03%.
The average Lit volume has been 59.97%.

BIIB Volume by Exchange

Nasdaq GSM

Off Exchange

IEX

Cboe BZX

NYSE Arca

Cboe EDGX

NYSE

NYSE National

Cboe BYX

MEMX

Nasdaq BX