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Prothena Corporation plc Share Price

Prothena Corporation plc Share Price

NASDAQ: PRTA | Small Cap
$8.82
+$0.18 (2.08%) Last updated on 10 Oct, 2026 | 01:29 IST
  • Performance
  • Chart
  • Fundamentals
  • Quarterly P&L
  • Annual P&L
  • About
  • Price history
  • FAQs

Prothena Corporation plc Stock Performance

Open
$8.66
Prev. Close
$8.64
Circuit Range
N/A
Day Range
$8.64 - $9.29
Year Range
$7.81 - $11.77
Volume
63,270
Average Traded
$9.06

Prothena Corporation plc Share Price Today

As of 10 October 2026, Prothena Corporation plc's share price is $8.82. The stock opened at $8.66, compared to its previous close of $8.64. During today's trading session, Prothena Corporation plc's share price traded between $8.64 and $9.29, with an average price of $8.97. Over the past 52 weeks, the stock has recorded a high of $11.77 and a low of $7.81. In terms of performance, Prothena Corporation plc's share price has declined by 20.36% over the last six months and is down 17.88% on a year-on-year basis.

Prothena Corporation plc Share Price Chart

$8.64$9.29
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Prothena Corporation plc Stock Fundamentals & Key Indicators

Market Cap
$474.77M
PE Ratio (TTM)
N/A
Dividend Yield
0.00%
EPS (TTM)
$-0.86
Revenue (TTM)
$9.68B
Return On Equity (TTM)
-15.33%
Profit Margin
-2521.59%
Debt to Equity
0.00
Quarterly Earnings Growth YoY
49.15%

Prothena Corporation plc Quarterly Profit & Loss

All figures in USD

ParticularsSep 2025Dec 2025Mar 2026Jun 2026
Revenue$2.42$0.02$51.08$1.01
Net Profit-$36.54-$21.59$32.72-$18.58
Net Profit Margin-1509.92%-107950.00%64.06%-1839.60%
Income ChangeN/A40.91%251.55%-156.78%

Prothena Corporation plc Annual Profit & Loss

All figures in USD

Particulars2022202320242025
Revenue$53.91$91.37$135.16$9.68
Net Profit-$116.95-$147.03-$122.31-$244.09
Net Profit Margin-216.94%-160.92%-90.49%-2521.59%
Income ChangeN/A-25.72%16.81%-99.57%

About Prothena Corporation plc

Prothena Corp PLC is a late-stage clinical biotechnology company that focuses on protein dysregulation and a pipeline of investigational therapeutics with the potential to change the course of devastating neurodegenerative and rare and peripheral amyloid diseases. Prothena is developing and applying its proprietary CYTOPE technology to target a broad spectrum of intracellular disease pathways in the brain and periphery. The company's pipeline includes both wholly-owned and partnered programs like Prasinezumab, Coramitug (PRX004), BMS-986446 (PRX005), PRX019, TDP-43 CYTOPE, and PRX012-TfR, being developed for the potential treatment of Parkinson's disease, ATTR amyloidosis with cardiomyopathy, Alzheimer's disease, Amyotrophic lateral sclerosis (ALS), and other neurodegenerative diseases.

Prothena Corporation plc Historical Returns

MonthOpenCloseChange %
Oct 2026
$8.56
$8.82
+5.06%
Sep 2026
$9.28
$8.40
-7.59%
Aug 2026
$8.05
$9.09
+12.10%
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%

PRTA Share Price FAQs

What is Prothena Corporation plc share price today?

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Prothena Corporation plc share price today is $8.82 as on October 10, 2026 at 1:29 am IST.

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

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The 52 week high of Prothena Corporation plc stock is $11.77, while the 52 week low is $7.81 as of 10 Oct '26.

What is PRTA's market capitalisation today?

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PRTA market capitalisation is $474.77M as of October 10, 2026, at 3:00 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 -18.58B USD.

What is the 5 year returns of PRTA?

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The 5 year returns of PRTA is -84.07% as on 10 Oct '26.

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

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PRTA stock price hit a high of $9.29 and low of $8.64 as of 10 Oct '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.