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PRTA
Prothena Corporation plc
stock NASDAQ

Market Open

Sep 30, 2026 2:20:25 PM EDT

8.55USD-2.620%(-0.23)240,893

7.37Bid 8.56Ask 1.19Spread

Pre-market

Sep 30, 2026 9:27:30 AM EDT

8.95USD+1.936%(+0.17)3,610

After-hours

0.00USD0.000%(0.00)0

OverviewOptionsHistoricalExchange VolumeShortsMore

PRTA Volume Sep 30, 2026 2:04:54 PM EDT

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Exchange	Day%	Volume	30D%
Off Exchange¹	43.87	98,584	33.45
Nasdaq GSM	26.42	59,368	46.11
NYSE Arca	8.42	18,909	5.86
Cboe BZX	6.07	13,646	3.38
IEX	5.02	11,285	5.17
Cboe EDGX	4.13	9,289	2.20
NYSE	2.70	6,065	1.45
MEMX	0.76	1,705	0.78
Nasdaq BX	0.58	1,308	0.14
Cboe BYX	0.53	1,192	0.43
Cboe EDGA	0.38	860	0.32
MIAX Pearl	0.35	780	0.10
NYSE National	0.26	590	0.10
Nasdaq PHLX	0.21	479	0.14
Texas Stock Exchange LLC	0.18	400	0.15
NYSE American	0.10	235	0.10
CHX	0.00	5	0.10
24X National	0.00	0	0.01

chartexchange.com

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

PRTA Nutrition Facts

0.54 servings per container

Serving size

416.13K

Calories

224.70K

% Day

% Avg

Off Exchange¹ 99K

43.87%

33.45%

Nasdaq GSM 59K

26.42%

46.11%

NYSE Arca 19K

8.42%

5.86%

Cboe BZX 14K

6.07%

3.38%

IEX 11K

5.02%

5.17%

Cboe EDGX 9K

4.13%

2.20%

NYSE 6K

2.70%

1.45%

MEMX 2K

0.76%

0.78%

Nasdaq BX 1K

0.58%

0.14%

Cboe BYX 1K

0.53%

0.43%

Cboe EDGA 860

0.38%

0.32%

MIAX Pearl 780

0.35%

0.10%

NYSE National 590

0.26%

0.10%

Nasdaq PHLX 479

0.21%

0.14%

Texas Stock Exchange LLC 400

0.18%

0.15%

NYSE American 235

0.10%

CHX 5

0.00%

0.10%

24X National 0

0.00%

0.01%

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 98,584, which is 43.87% of today's total volume.
Today's Lit volume is 126,116, which is 56.13%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 33.45%.
The average Lit volume has been 66.55%.

PRTA Volume by Exchange

Off Exchange

Nasdaq GSM

NYSE Arca

Cboe BZX

IEX

Cboe EDGX

NYSE

MEMX

Nasdaq BX

Cboe BYX

Cboe EDGA