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Latest quote
$8.84
+$0.23 · +2.67%
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.
Previous close
$8.84
+$0.23 · +2.67%
After-hours
$8.84
$0.00 · 0.00%
Oct 9, 7:30 PM ET
Regular session · ET · Market data may be delayed.
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.
Day range
Current $8.84
52-week range
Current $8.84
Regular session · ET · Market data may be delayed.
GoAI Score
Hold
Valuation
47
Fair Value
Sentiment
54
Mixed
Risk
47
Elevated Risk
Momentum
37
Weakening
Full GoAI research
Thesis, catalysts, evidence, and risk analysis.
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.
Day range
Current $8.84
52-week range
Current $8.84
Profitability as a percentage of reported revenue.
Revenue
Operating income
Net income
| Metric (USD) | FY2025 | FY2024 | FY2023 | FY2022 | FY2021 |
|---|---|---|---|---|---|
| Revenue | 9.68M USD | 135.16M USD | 91.37M USD | 53.91M USD | 200.58M USD |
| Cost of goods sold | 3.7M USD | — | — | — | — |
| Gross profit | 5.98M USD | 135.16M USD | 91.37M USD | 53.91M USD | 200.58M USD |
| Research and development | 134.85M USD | 222.52M USD | 220.57M USD | 135.56M USD | 82.28M USD |
| Selling, general, and administrative | 59.39M USD | 67.2M USD | 61.84M USD | 49.9M USD | 46.32M USD |
| Operating expenses | 190.54M USD | 289.72M USD | 282.41M USD | 185.46M USD | 128.6M USD |
| Interest income | 14.14M USD | 25.82M USD | 31.01M USD | 6.35M USD | 42K USD |
| Depreciation and amortization | 895K USD | 893K USD | 928K USD | 744K USD | 1.12M USD |
| Operating income | −184.56M USD | −154.56M USD | −191.04M USD | −131.56M USD | 71.98M USD |
| Net income | −244.09M USD | −122.31M USD | −147.03M USD | −116.95M USD | 66.98M USD |
Company facts updated Oct 10, 2026.
Recent quarterly results
Recent quarterly results
Funds reporting this stock among their holdings, ordered by reported position size.
iShares Russell 2000 ETFIWM9.81M0.01%78.27B USD0.19%$278.94+0.49%
State Street SPDR S&P Biotech ETFXBI8.08M0.08%9.87B USD0.35%$153.77+3.00%
Vanguard Extended Market ETFVXF4.58M0.00%95.4B USD0.05%$235+0.80%
Dimensional - US Small Cap ETFDFAS3.17M0.01%33.87B USD0.31%$78.35+0.32%
iShares Biotechnology ETFIBB2.99M0.03%10.28B USD0.44%$206.49+3.00%
Vanguard Russell 2000 ETFVTWO2.39M0.01%18B USD0.06%$112.66+0.50%
iShares Russell 2000 Growth ETFIWO2.01M0.01%13.97B USD0.24%$356.78+0.94%
Schwab U.S. Small-Cap ETFSCHA1.85M0.01%21.73B USD0.03%$32.79+0.40%
iShares Russell 2000 ETFIWM
State Street SPDR S&P Biotech ETFXBI
Vanguard Extended Market ETFVXF
Dimensional - US Small Cap ETFDFAS
iShares Biotechnology ETFIBB
Vanguard Russell 2000 ETFVTWO
iShares Russell 2000 Growth ETFIWO
Schwab U.S. Small-Cap ETFSCHAAI-generated and delayed market data for informational and educational purposes only. Not investment advice.