PRTA logo

PROTHENA CORP PLC

PRTANASDAQ
πŸ† #2936 by market capEarnings Feb 17 Β· PostUS Equity
$8.88β–Ό $0.22 (βˆ’2.42%)
πŸŒ… Pre-market$8.71β–Ό 1.91%Regular close Β· extended-hours price shown
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24hβ–Ό 2.4%
7dβ–² 8.2%
14dβ–² 6.2%
30dβ–² 6.1%
ytdβ–Ό 6.9%
1yβ–Ό 15.3%
🏦Market Cap
$456M
Small Cap
πŸ“ˆRevenue Growth (YoY)
-92.8%
Declining
πŸ“ŠGross Margin
43.5%
Healthy
πŸ’΅FCF Margin
-111.3%
Thin
βš–οΈP/S Ratio
8.4x
Elevated
Otter Score
52
Fair

Trading Snapshot

Day Range
$8.76 – $9.26
52-Week Range
$7.73 – $11.80
Volume (shares)
370,067
Avg Volume (shares)
β€”
Shares Outstanding
51.3M
Next Earnings
2027-02-17

Fundamentals Snapshot

Annual Revenue
$10M
Last Q Revenue
$1M
P/E Ratio
-10.7
P/S Ratio
8.4x
EPS (TTM)
$-0.84
Dividend Yield
0.00%
Dilution (1yr)
+0.0%
PRTA logo

PROTHENA CORP PLC

PRTA
Financial Trends
RevenueThe total money the company brought in from sales, before subtracting any costs.
$10Mβ–Ό βˆ’92.8% YoY
Gross MarginOf every $1 of sales, how much is left after the direct cost of making the product/service. Higher = more efficient.
61.8%β–Ό βˆ’38.2% YoY
Operating IncomeProfit from the core business after operating costs, but before interest and taxes. Negative means the core business isn’t profitable yet.
βˆ’$185Mβ–² +19.4% YoY
Free Cash FlowCash left over after running the business and paying for equipment/capex. Negative means the company is burning cash.
βˆ’$164Mβ–² +8.9% YoY
Shares OutstandingHow many shares exist. Rising means the company is issuing more shares, which dilutes (shrinks) each existing owner’s slice.
53.8Mβ–² +0.0% YoY
Net CashCash minus total debt. Positive = more cash than debt (financially strong); negative = more debt than cash (net debt).
$294Mβ–Ό βˆ’$167M YoY
StockOtter Β· stockotter.space

About PROTHENA CORP PLC

Prothena Corporation plc, a late-stage clinical biotechnology company, focuses on discovery and development of novel therapies to treat diseases caused by protein dysregulation. Its product pipeline includes Prasinezumab, an investigational humanized monoclonal antibody which is in Phase 3 clinical trial for the treatment of parkinson's disease and other synucleinopathies. The company also develops Coramitug, an investigational antibody, which is in Phase 3 clinical trial for the treatment of transthyretin amyloidosis; BMS-986446, an anti-tau antibody which is in Phase 2 clinical trial to treat Alzheimer's disease; PRX019, an investigational antibody which is in Phase 1 clinical trial for the treatment of neurodegenerative diseases; and PRX123, a Dual Aß-Tau Vaccine, which is in preclinical trial for treating Alzheimer's disease. In addition, it develops discovery- and late-preclinical-stage programs include TDP-43 CYTOPE for the treatment of amyotrophic lateral sclerosis; PRX012, a next-generation anti-Aß antibody which is in phase 1 clinical trial to treat Alzheimer's disease; and PRX012-TfR, a preclinical program for the treatment of Alzheimer's disease. It has a license, development, and commercialization agreement with F. Hoffmann-La Roche Ltd. and Hoffmann-La Roche Inc. to develop and commercialize antibodies that target a-synuclein, including prasinezumab; and master collaboration agreement with Bristol Myers Squibb to develop and commercialize antibodies targeting tau, TDP-43. Prothena Corporation plc was incorporated in 2012 and is based in Dublin, Ireland.

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Otter Score Breakdown

How it's scoredFive components, each rated 1–5β˜… and equally weighted (20%), averaged to a 0–100 score:πŸ’Ž Quality β€” gross marginπŸš€ Growth β€” revenue YoYβš–οΈ Valuation β€” P/S ratio⚑ Momentum β€” 30-day price changeπŸ’§ Dilution β€” 1-yr share issuance (buybacks score higher)
πŸ’ŽQualityβ˜…β˜…β˜…β˜…β˜…
πŸš€Growthβ˜…β˜…β˜…β˜…β˜…
βš–οΈValuationβ˜…β˜…β˜…β˜…β˜…
⚑Momentumβ˜…β˜…β˜…β˜…β˜…
πŸ’§Dilutionβ˜…β˜…β˜…β˜…β˜…
Overall Score
Fair
52/100

Analyst Ratings

β“˜
Consensus
Buy
12 analysts
Strong Buy2
Buy6
Hold3
Sell1
Strong Sell0
Ratings as of Oct 2026

Latest News & Updates

Defense WorldΒ·3d ago

Prothena (NASDAQ:PRTA) Major Shareholder William Scully Purchases 50,000 Shares of Company Stock

Prothena Corporation plc (NASDAQ: PRTA - Get Free Report) major shareholder William Scully acquired 50,000 shares of the company's stock in a transaction on Friday, October 23rd. The shares were acquired at an average pr

Defense WorldΒ·3d ago

Prothena (NASDAQ:PRTA) Major Shareholder William Scully Buys 100,000 Shares of Stock

Prothena Corporation plc (NASDAQ: PRTA - Get Free Report) major shareholder William Scully purchased 100,000 shares of the business's stock in a transaction that occurred on Thursday, October 22nd. The stock was bought a

Defense WorldΒ·7d ago

Prothena (NASDAQ:PRTA) Shares Break Below Two Hundred Day Moving Average – What’s Next?

Prothena Corporation plc (NASDAQ: PRTA - Get Free Report)'s stock price passed below its 200-day moving average during trading on Thursday. The stock has a 200-day moving average of $9.26 and traded as low as $7.96. Prot

Zacks Investment ResearchΒ·9d ago

Prothena's Partnership Strategy: Growth Driver or Limitation?

PRTA's pharma partnerships offer $3 billion in potential milestone payments plus royalties, but clinical risks and partner control remain key challenges.

Defense WorldΒ·17d ago

Prothena Corporation plc (NASDAQ:PRTA) Stock Has Average Price Target of $24.57

Shares of Prothena Corporation plc (NASDAQ: PRTA - Get Free Report) have received a consensus rating of "Moderate Buy" from the eight research firms that are covering the stock, MarketBeat.com reports. One research analy

Defense WorldΒ·19d ago

Prothena (NASDAQ:PRTA) Stock: Insider William Scully Acquires 125,000 Shares

Prothena Corporation plc (NASDAQ: PRTA - Get Free Report) major shareholder William Scully purchased 125,000 shares of the business's stock in a transaction on Wednesday, October 7th. The stock was bought at an average c