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PRTA
Prothena Corporation plc
stock NASDAQ

At Close

Sep 28, 2026 3:59:55 PM EDT

8.74USD+5.428%(+0.45)488,859

0.00Bid 0.00Ask 0.00Spread

Pre-market

Sep 24, 2026 9:29:59 AM EDT

8.73USD+5.308%(+0.44)0

After-hours

0.00USD0.000%(0.00)0

OverviewOptionsHistoricalExchange VolumeShortsMore

PRTA Volume Sep 29, 2026

[NF]

Exchange	Day%	Volume	30D%
Off Exchange¹	47.00	229,721	32.07
Nasdaq GSM	34.28	167,549	47.67
NYSE Arca	6.22	30,393	5.84
IEX	4.33	21,173	5.25
Cboe BZX	3.08	15,074	3.37
Cboe EDGX	1.51	7,359	2.05
MEMX	1.48	7,249	0.77
NYSE	1.08	5,277	1.41
Cboe BYX	0.26	1,285	0.42
MIAX Pearl	0.18	886	0.08
Nasdaq PHLX	0.17	814	0.15
Cboe EDGA	0.16	787	0.31
Nasdaq BX	0.13	642	0.13
CHX	0.05	245	0.10
Texas Stock Exchange LLC	0.04	200	0.16
NYSE American	0.03	138	0.09
24X National	0.00	9	0.02
NYSE National	0.00	0	0.10

chartexchange.com

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

PRTA Nutrition Facts

1.20 servings per container

Serving size

408.23K

Calories

488.80K

% Day

% Avg

Off Exchange¹ 230K

47.00%

32.07%

Nasdaq GSM 168K

34.28%

47.67%

NYSE Arca 30K

6.22%

5.84%

IEX 21K

4.33%

5.25%

Cboe BZX 15K

3.08%

3.37%

Cboe EDGX 7K

1.51%

2.05%

MEMX 7K

1.48%

0.77%

NYSE 5K

1.08%

1.41%

Cboe BYX 1K

0.26%

0.42%

MIAX Pearl 886

0.18%

0.08%

Nasdaq PHLX 814

0.17%

0.15%

Cboe EDGA 787

0.16%

0.31%

Nasdaq BX 642

0.13%

CHX 245

0.05%

0.10%

Texas Stock Exchange LLC 200

0.04%

0.16%

NYSE American 138

0.03%

0.09%

24X National 9

0.00%

0.02%

NYSE National 0

0.00%

0.10%

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

chartexchange.com

PRTA Off Exchange & Dark Pool Summary

Today's Off Exchange & Dark Pool volume is 229,721, which is 47.00% of today's total volume.
Today's Lit volume is 259,080, which is 53.00%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 32.07%.
The average Lit volume has been 67.93%.

PRTA Volume by Exchange

Off Exchange

Nasdaq GSM

NYSE Arca

IEX

Cboe BZX

Cboe EDGX

MEMX

NYSE

Cboe BYX

MIAX Pearl

Nasdaq PHLX