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Prothena Corporation plc Ordinary Shares Share Price

Prothena Corporation plc Ordinary Shares Share Price

NASDAQ: PRTA | Small Cap
$8.74
+$0.18 (2.04%) Last updated on 08 Aug, 2026 | 01:29 IST
  • Performance
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  • Fundamentals
  • Quarterly P&L
  • Annual P&L
  • About
  • Price history
  • FAQs

Prothena Corporation plc Ordinary Shares Stock Performance

Open
$8.47
Prev. Close
$8.56
Circuit Range
N/A
Day Range
$8.32 - $8.84
Year Range
$7.44 - $11.77
Volume
22,570
Average Traded
$8.65

Prothena Corporation plc Ordinary Shares Share Price Today

As of 10 August 2026, Prothena Corporation plc Ordinary Shares's share price is $8.74. The stock opened at $8.47, compared to its previous close of $8.56. During today's trading session, Prothena Corporation plc Ordinary Shares's share price traded between $8.32 and $8.84, with an average price of $8.58. Over the past 52 weeks, the stock has recorded a high of $11.77 and a low of $7.44. In terms of performance, Prothena Corporation plc Ordinary Shares's share price has risen by 0.75% over the last six months and is up 6.59% on a year-on-year basis.

Prothena Corporation plc Ordinary Shares Share Price Chart

$8.32$8.84
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Prothena Corporation plc Ordinary Shares Stock Fundamentals & Key Indicators

Market Cap
$470.47M
PE Ratio (TTM)
-1.93
Dividend Yield
N/A
EPS (TTM)
$-4.53
Revenue (TTM)
$9.68M
Return On Equity (TTM)
-87.03%
Profit Margin
-2520.57%
Debt to Equity
0.15
Quarterly Earnings Growth YoY
38.07%

Prothena Corporation plc Ordinary Shares Quarterly Profit & Loss

All figures in USD

ParticularsMar 2024Jun 2024Sep 2024Mar 2025Jun 2025Sep 2025
Revenue$50000.00$132.01M$970000.00$2.83M$4.42M$2.42M
Net Profit-$72.24M$66.89M-$59.00M-$60.20M-$125.77M-$36.54M
Net Profit Margin-144478.00%50.67%-6082.58%-2128.54%-2845.41%-1513.08%
Income ChangeN/A192.59%-188.21%-2.02%-108.93%70.95%

Prothena Corporation plc Ordinary Shares Annual Profit & Loss

All figures in USD

Particulars20212022202320242025
Revenue$200.58M$53.91M$91.37M$135.16M$9.68M
Net Profit$66.97M-$116.95M-$147.03M-$122.31M-$244.09M
Net Profit Margin33.39%-216.95%-160.91%-90.49%-2520.57%
Income ChangeN/A-274.62%-25.72%16.81%-99.57%

About Prothena Corporation plc Ordinary Shares

Prothena Corporation plc, a late-stage clinical biotechnology company, focuses on discovery and development of novel therapies to treat diseases caused by protein dysregulation in the United States. Its product pipeline include Prasinezumab, an investigational humanized monoclonal antibody which is in phase 2b clinical trial, as well as phase 1 and 2 clinical trials for the treatment of parkinson's disease and other synucleinopathies. The company also develops Coramitug, an investigational antibody, which is in phase 2 clinical trial for potential treatment of transthyretin amyloidosis; BMS-986446, an investigational antibody, which is in phase 2 clinical trial to treat Alzheimer's disease; PRX012, an investigational antibody, which is in phase 1 clinical trial to treat Alzheimer's disease; PRX123, a Dual Aß-Tau Vaccine, which is in preclinical trial for treating Alzheimer's disease; and PRX019, an investigational antibody, which is in phase 1 clinical trial for the potential treatment of neurodegenerative diseases. 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.

Prothena Corporation plc Ordinary Shares Historical Returns

MonthOpenCloseChange %
Aug 2026
$8.05
$8.76
+8.03%
Jul 2026
$9.84
$8.11
-17.26%
Jun 2026
$9.90
$9.80
-3.54%
May 2026
$11.13
$10.16
-8.26%
Apr 2026
$10.01
$11.07
+14.06%
Mar 2026
$9.11
$9.71
+11.93%
Feb 2026
$8.72
$8.68
-1.48%
Jan 2026
$9.43
$8.80
-7.66%
Dec 2025
$11.10
$9.54
-11.51%
Nov 2025
$10.82
$10.78
+0.33%
Oct 2025
$9.89
$10.74
+10.10%
Sep 2025
$8.16
$9.76
+18.96%

PRTA Share Price FAQs

What is Prothena Corporation plc Ordinary Shares share price today?

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Prothena Corporation plc Ordinary Shares share price today is $8.74 as on August 8, 2026 at 1:29 am IST.

What is the 52 week high and 52 week low of Prothena Corporation plc Ordinary Shares stock?

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The 52 week high of Prothena Corporation plc Ordinary Shares stock is $11.77, while the 52 week low is $7.44 as of 8 Aug '26.

What is PRTA's market capitalisation today?

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PRTA market capitalisation is $470.47M as of August 10, 2026, at 9:25 am IST.

What is PRTA's net income for the last quarter?

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PRTA's net income for the last quarter is -0.04B USD.

What is the 5 year returns of PRTA?

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The 5 year returns of PRTA is -86.98% as on 8 Aug '26.

What is the high & low stock price of PRTA today?

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PRTA stock price hit a high of $8.84 and low of $8.32 as of 8 Aug '26.

Can I buy PRTA shares in India?

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Yes. You can buy PRTA in India by opening an international trading account.