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ATRA
Atara Biotherapeutics, Inc
stock NASDAQ

At Close

Sep 23, 2026 3:59:49 PM EDT

8.55USD-4.255%(-0.38)40,473

0.00Bid 0.00Ask 0.00Spread

Pre-market

Sep 23, 2026 8:41:30 AM EDT

9.00USD+0.784%(+0.07)130

After-hours

0.00USD0.000%(0.00)0

OverviewHistoricalDark Pool PrintsShortsMore

ATRA Volume Sep 23, 2026

[NF]

Exchange	Day%	Volume	30D%
Nasdaq GSM	30.57	12,346	31.38
Off Exchange¹	23.48	9,482	37.86
Cboe EDGX	17.42	7,037	6.18
NYSE Arca	14.06	5,680	7.93
Cboe BYX	5.23	2,113	2.33
Nasdaq BX	2.81	1,135	3.89
IEX	2.54	1,025	1.98
Cboe BZX	1.96	791	2.22
NYSE National	0.75	302	0.95
MEMX	0.43	172	0.89
NYSE	0.32	130	0.84
Nasdaq PHLX	0.18	74	0.14
MIAX Pearl	0.14	58	3.05
Cboe EDGA	0.07	28	0.22
NYSE American	0.03	14	0.04
24X National	0.00	2	0.01
LTSE	0.00	0	0.08
CHX	0.00	0	0.01
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.

ATRA Nutrition Facts

0.78 servings per container

Serving size

51.46K

Calories

40.39K

% Day

% Avg

Nasdaq GSM 12K

30.57%

31.38%

Off Exchange¹ 9K

23.48%

37.86%

Cboe EDGX 7K

17.42%

6.18%

NYSE Arca 6K

14.06%

7.93%

Cboe BYX 2K

5.23%

2.33%

Nasdaq BX 1K

2.81%

3.89%

IEX 1K

2.54%

1.98%

Cboe BZX 791

1.96%

2.22%

NYSE National 302

0.75%

0.95%

MEMX 172

0.43%

0.89%

NYSE 130

0.32%

0.84%

Nasdaq PHLX 74

0.18%

0.14%

MIAX Pearl 58

0.14%

3.05%

Cboe EDGA 28

0.07%

0.22%

NYSE American 14

0.03%

0.04%

24X National 2

0.00%

0.01%

LTSE 0

0.00%

0.08%

CHX 0

0.00%

0.01%

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

ATRA Off Exchange & Dark Pool Summary

Today's Off Exchange & Dark Pool volume is 9,482, which is 23.48% of today's total volume.
Today's Lit volume is 30,907, which is 76.52%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 37.86%.
The average Lit volume has been 62.14%.

ATRA Volume by Exchange

Nasdaq GSM

Off Exchange

Cboe EDGX

NYSE Arca

Cboe BYX

Nasdaq BX

IEX

Cboe BZX

NYSE National

MEMX

NYSE