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PRTA
Prothena Corporation plc
stock NASDAQ

At Close

Sep 30, 2026 3:59:53 PM EDT

8.37USD-4.670%(-0.41)634,318

0.00Bid 0.00Ask 0.00Spread

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

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Exchange	Day%	Volume	30D%
Nasdaq GSM	40.44	254,348	46.18
Off Exchange¹	36.96	232,489	33.44
NYSE Arca	6.34	39,871	5.83
IEX	4.89	30,743	5.16
Cboe BZX	3.77	23,698	3.35
Cboe EDGX	2.52	15,840	2.18
NYSE	2.26	14,236	1.47
MEMX	0.57	3,611	0.77
Cboe BYX	0.47	2,926	0.43
Nasdaq BX	0.36	2,291	0.15
Cboe EDGA	0.36	2,277	0.32
MIAX Pearl	0.22	1,390	0.10
Texas Stock Exchange LLC	0.20	1,253	0.16
Nasdaq PHLX	0.19	1,205	0.14
NYSE National	0.19	1,201	0.10
NYSE American	0.13	802	0.10
CHX	0.12	772	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

1.51 servings per container

Serving size

416.13K

Calories

628.95K

% Day

% Avg

Nasdaq GSM 254K

40.44%

46.18%

Off Exchange¹ 232K

36.96%

33.44%

NYSE Arca 40K

6.34%

5.83%

IEX 31K

4.89%

5.16%

Cboe BZX 24K

3.77%

3.35%

Cboe EDGX 16K

2.52%

2.18%

NYSE 14K

2.26%

1.47%

MEMX 4K

0.57%

0.77%

Cboe BYX 3K

0.47%

0.43%

Nasdaq BX 2K

0.36%

0.15%

Cboe EDGA 2K

0.36%

0.32%

MIAX Pearl 1K

0.22%

0.10%

Texas Stock Exchange LLC 1K

0.20%

0.16%

Nasdaq PHLX 1K

0.19%

0.14%

NYSE National 1K

0.19%

0.10%

NYSE American 802

0.13%

0.10%

CHX 772

0.12%

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 232,489, which is 36.96% of today's total volume.
Today's Lit volume is 396,464, which is 63.04%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 33.44%.
The average Lit volume has been 66.56%.

PRTA Volume by Exchange

Nasdaq GSM

Off Exchange

NYSE Arca

IEX

Cboe BZX

Cboe EDGX

NYSE

MEMX

Cboe BYX

Nasdaq BX

Cboe EDGA