Prothena Corporation plc

PRTA·NasdaqGS
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8.43−0.41 (−4.64%)today
At close: Oct 12, 4:00 PM EDT · May be delayed up to 15 min · USD
After hours8.430.00 (0.00%)Oct 12, 4:01 PM EDT

Prices may be delayed up to 15 min. Not investment advice. News volume: articles in the 4Search index each day.

Key statistics

Previous close8.84
Open8.81
Day range8.408.81
52-week range7.7311.80
Off day high−4.31%
Off 52-week high−28.56%
Volume489.76K
Avg. volume (3M)491.18K
Market cap432.77M
EPS (TTM)-0.8200
Forward P/E-5.55
P/E ratio (TTM)—
Dividend yield—
Beta (5Y)—
Shares outstanding51.34M
Short interest—
Earnings dateAug 6, 2026 (est.)
Analyst target—
Profit margin—

Against its peers

Compare in full ›
PRTA ACIU ALEC PMN ARVN KRSA
Market cap 432.77M 243.60M 232.25M 84.74M 480.68M 1.55B
P/E (TTM) — — — — 28.7 —
Forward P/E -5.5 4.1 -2.8 -2.1 -2.3 -9.6
Price/book 1.5 5.8 -23.4 1.7 0.9 -4.3
Dividend yield — — — — — —
1-year change −14.59% −20.20% −30.43% −19.92% −20.83% +110.68%
Today −4.64% −2.00% 0.00% −1.66% −2.49% +0.35%

The closest companies by business and industry (Biotechnology). Prices may be delayed up to 15 min.

Related companies

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The businesses closest to PRTA's by what they do, from their descriptions, with the same industry weighted in.

Company Mkt cap Price Today
AC Immune SAACIU · Biotechnology 243.60M 2.4500 −2.00%
Alector, Inc.ALEC · Biotechnology 232.25M 2.0800 0.00%
ProMIS Neurosciences, Inc.PMN · Biotechnology 84.74M 9.45 −1.66%
Arvinas, Inc.ARVN · Biotechnology 480.68M 7.45 −2.49%
Korsana Biosciences, Inc.KRSA · Biotechnology 1.55B 34.04 +0.35%
Voyager Therapeutics, Inc.VYGR · Biotechnology 139.87M 2.2700 −7.35%
Protara Therapeutics, Inc.TARA · Biotechnology 163.69M 2.7700 +0.54%
ProQR Therapeutics N.V.PRQR · Biotechnology 228.61M 1.6200 −0.61%

From the 4Search instruments index: what each company does (its business description), its industry, size, headquarters and the markets it serves; and from a year of daily prices, which move together. Prices may be delayed up to 15 min.

Latest news

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No recent coverage in the 4Search index.

From articles in the 4Search news index.

Market data is provided for information only and comes from free public sources. Prices may be delayed up to 15 minutes; data may be incomplete or inaccurate. Nothing on this page is investment advice or a recommendation to buy or sell any security. News and coverage analytics are drawn from the 4Search index. Terms of use.