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CSTL
Castle Biosciences, Inc. Common Stock
stock NASDAQ

At Close

Aug 5, 2026 3:59:56 PM EDT

30.40USD-2.502%(-0.78)520,194

26.29Bid 36.31Ask 10.02Spread

Pre-market

0.00USD-100.000%(-30.39)0

After-hours

Aug 4, 2026 4:00:30 PM EDT

31.18USD0.000%(0.00)0

OverviewOptionsHistoricalExchange VolumeShortsMore

CSTL Volume Aug 5, 2026

[NF]

Exchange	Day%	Volume	30D%
Off Exchange¹	68.44	313,431	36.69
Nasdaq GSM	16.04	73,456	39.33
IEX	4.46	20,424	5.49
NYSE Arca	3.34	15,285	7.62
Cboe BZX	2.83	12,981	4.13
Cboe EDGX	1.51	6,907	2.44
NYSE	1.12	5,112	0.98
Nasdaq BX	0.51	2,339	0.33
Cboe BYX	0.35	1,619	0.84
MEMX	0.33	1,512	0.76
Nasdaq PHLX	0.32	1,468	0.19
NYSE National	0.20	930	0.13
MIAX Pearl	0.18	810	0.15
LTSE	0.17	785	0.20
Cboe EDGA	0.16	740	0.56
CHX	0.04	162	0.08
NYSE American	0.00	10	0.09
24X National	0.00	0	0.00
Texas Stock Exchange LLC	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.

CSTL Nutrition Facts

1.07 servings per container

Serving size

429.20K

Calories

457.97K

% Day

% Avg

Off Exchange¹ 313K

68.44%

36.69%

Nasdaq GSM 73K

16.04%

39.33%

IEX 20K

4.46%

5.49%

NYSE Arca 15K

3.34%

7.62%

Cboe BZX 13K

2.83%

4.13%

Cboe EDGX 7K

1.51%

2.44%

NYSE 5K

1.12%

0.98%

Nasdaq BX 2K

0.51%

0.33%

Cboe BYX 2K

0.35%

0.84%

MEMX 2K

0.33%

0.76%

Nasdaq PHLX 1K

0.32%

0.19%

NYSE National 930

0.20%

0.13%

MIAX Pearl 810

0.18%

0.15%

LTSE 785

0.17%

0.20%

Cboe EDGA 740

0.16%

0.56%

CHX 162

0.04%

0.08%

NYSE American 10

0.00%

0.09%

24X National 0

0.00%

Texas Stock Exchange LLC 0

0.00%

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

chartexchange.com

CSTL Off Exchange & Dark Pool Summary

Today's Off Exchange & Dark Pool volume is 313,431, which is 68.44% of today's total volume.
Today's Lit volume is 144,540, which is 31.56%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 36.69%.
The average Lit volume has been 63.31%.

CSTL Volume by Exchange

Off Exchange

Nasdaq GSM

IEX

NYSE Arca

Cboe BZX

Cboe EDGX

NYSE

Nasdaq BX

Cboe BYX

MEMX

Nasdaq PHLX