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home>US Stocks>Prothena
PRTA
ProthenaHealthcare
$8.23$-2.25 (-21.48%)in 1 year
As on 13 Nov 2026 at 02:29NASDAQ
52 Week Low: $7.7352 Week High: $11.80

Prothena Share Price Today

Prothena opened lower at $8.70, compared with its previous close of $8.73. In the last trading session, the stock traded between $8.22 and $8.70. It showed a downward intraday trend.

Return calculator

Time Period

An investment of $100 made 5 years ago in Prothena is now worth

$ 14.56

Resulting in a loss of

$ 85.44 (85.44%)

Invest with $1

Note: Past profits do not guarantee future returns.

Analyst Overview

Buy

Rating from 4 Analysts

Buy
50%
Hold
25%
Sell
25%

Markets Today

Today's Change

$-0.50 (-5.74%)

Day High

$8.70

Day Low

$8.22

Day Open

$8.70

Prev Close

$8.73

Volume

1,65,873

1W Return

-1.88%

1M Return

-2.44%

3M Return

-10.79%

6M Return

-14.90%

1Y Return

-21.48%

Fundamentals

Market Cap ($ Mn)

423

PE Ratio

-

PB Ratio

1.68

PEG Ratio

-

ROE

-66.90%

ROCE

-57.67%

EPS (TTM)

$-0.32

Investment Returns

1 Week

-1.88%

1 Month

-2.44%

3 Months

-10.79%

6 Months

-14.90%

9 Months

-7.85%

Financials

Quarterly
All values in $ Mn
2.8

Mar 25
4.4

Jun 25
2.4

Sep 25
0.0

Dec 25
1.0

Jun 26
0.6

Sep 26

Updates

7Aug

Prothena Corp Q2 EPS misses estimates as sales fall 77%

Prothena Corp reported Q2 EPS of $(0.36), missing estimates, while sales dropped 77.15% YoY to $1.010 million, significantly below expectations.

3mo ago
31Jul

Prothena Q2 Results: Financial data release set for Aug 6

Prothena Corporation plc scheduled its Q2 and H1 2026 earnings release for August 6, 2026, after market close. No conference call will be held. The biotech firm focuses on protein dysregulation therapies for neurodegenerative diseases.

3mo ago

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