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GBIO
Generation Bio Co. Common Stock
stock NASDAQ

At Close

Jul 18, 2025 3:59:46 PM EDT

0.4100USD-22.037%(-0.1149)4,595,611

0.00Bid 0.00Ask 0.0000Spread

Pre-market

Jul 18, 2025 9:28:30 AM EDT

0.4361USD-16.360%(-0.0853)1,038,786

After-hours

Jul 18, 2025 4:58:30 PM EDT

0.4100USD+0.861%(0.0000)27,912

OverviewOptionsHistoricalExchange VolumeShortsMore

GBIO Volume Jul 18, 2025

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Exchange	Day%	Volume	30D%
Off Exchange¹	64.81	2,978,453	62.76
Nasdaq GSM	15.86	728,966	20.89
NYSE Arca	9.39	431,454	6.70
Cboe EDGX	4.24	194,674	3.74
MEMX	2.56	117,860	2.36
IEX	0.82	37,542	1.32
Cboe EDGA	0.70	31,985	0.38
Cboe BZX	0.62	28,274	0.58
Cboe BYX	0.45	20,788	0.43
MIAX Pearl	0.31	14,315	0.54
NYSE	0.19	8,840	0.22
Nasdaq BX	0.04	1,660	0.06
NYSE National	0.02	700	0.02
Nasdaq PHLX	0.00	0	0.00
CHX	0.00	0	0.00
NYSE American	0.00	0	0.00

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

GBIO Nutrition Facts

2.96 servings per container

Serving size

1.55M

Calories

4.60M

% Day

% Avg

Off Exchange¹ 3M

64.81%

62.76%

Nasdaq GSM 729K

15.86%

20.89%

NYSE Arca 431K

9.39%

6.70%

Cboe EDGX 195K

4.24%

3.74%

MEMX 118K

2.56%

2.36%

IEX 38K

0.82%

1.32%

Cboe EDGA 32K

0.70%

0.38%

Cboe BZX 28K

0.62%

0.58%

Cboe BYX 21K

0.45%

0.43%

MIAX Pearl 14K

0.31%

0.54%

NYSE 9K

0.19%

0.22%

Nasdaq BX 2K

0.04%

0.06%

NYSE National 700

0.02%

Nasdaq PHLX 0

0.00%

CHX 0

0.00%

NYSE American 0

0.00%

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

chartexchange.com

GBIO Off Exchange & Dark Pool Summary

Today's Off Exchange & Dark Pool volume is 2,978,453, which is 64.81% of today's total volume.
Today's Lit volume is 1,617,058, which is 35.19%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 62.76%.
The average Lit volume has been 37.24%.

GBIO Volume by Exchange

Off Exchange

Nasdaq GSM

NYSE Arca

Cboe EDGX

MEMX

IEX

Cboe EDGA

Cboe BZX

Cboe BYX

MIAX Pearl

NYSE