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8.29
0.36%
-0.03
Prothena Corp Plc Stock (PRTA) Price History
The historical daily chart and data for Prothena Corp Plc stock (PRTA), show that the latest closing stock price as of September 25, 2026, is $8.29.
- Prothena Corp Plc all-time high stock price is $79.75, occurred on September 27, 2021.
- The lowest Prothena Corp Plc stock price recorded was $4.32 on May 28, 2025. Since then, Prothena Corp Plc's stock price has risen over 91.90% to $8.29 now.
- The 52-week high stock price for PRTA is $11.80, representing a 42.34% increase from the current share price, occurred on May 08, 2026.
- The 52-week low stock price for PRTA is $7.73, indicating a -6.76% decrease from the current share price, occurred on June 11, 2026.
- The closing price of Prothena Corp Plc (PRTA) stock in the beginning of 2025 was $49.22. The stock closed the year at $60.25, a gain of over 22.41% for the year.
The table below shows more information about PRTA historical price data:
Daily
Weekly
Monthly
7D
30D
60D
YTD
1Y
| Date | High | Low | High - Low | Volume | % Change |
|---|---|---|---|---|---|
| Sep 25, 2026 | $8.52 | $8.19 | $0.335 | 481,047.0 | -0.36% |
| Sep 24, 2026 | $8.73 | $8.28 | $0.45 | 426,061.0 | -4.15% |
| Sep 23, 2026 | $8.97 | $8.66 | $0.305 | 357,806.0 | -3.45% |
| Sep 22, 2026 | $9.09 | $8.70 | $0.39 | 385,512.0 | +5.64% |
| Sep 21, 2026 | $8.79 | $8.46 | $0.335 | 360,687.0 | -0.82% |
| Sep 18, 2026 | $8.60 | $8.25 | $0.35 | 1,828,400.0 | +1.42% |
| Sep 17, 2026 | $8.56 | $8.23 | $0.33 | 404,757.0 | +2.67% |
| Sep 16, 2026 | $8.50 | $8.20 | $0.30 | 398,330.0 | -1.08% |
| Sep 15, 2026 | $8.86 | $8.29 | $0.565 | 323,436.0 | -5.98% |
| Sep 14, 2026 | $8.99 | $8.79 | $0.20 | 374,871.0 | -0.78% |
| Sep 11, 2026 | $9.14 | $8.77 | $0.375 | 376,273.0 | -1.00% |
| Sep 10, 2026 | $9.26 | $8.97 | $0.285 | 310,810.0 | -3.01% |
| Sep 09, 2026 | $9.50 | $9.22 | $0.2758 | 294,557.0 | -2.52% |
| Sep 08, 2026 | $9.67 | $9.35 | $0.325 | 305,057.0 | -2.85% |
| Sep 04, 2026 | $9.87 | $9.48 | $0.39 | 383,926.0 | +2.29% |
| Sep 03, 2026 | $9.78 | $9.51 | $0.2681 | 275,198.0 | -0.88% |
| Sep 02, 2026 | $9.75 | $9.37 | $0.38 | 341,054.0 | +0.78% |
| Sep 01, 2026 | $9.63 | $9.26 | $0.37 | 267,669.0 | +2.78% |
| Aug 31, 2026 | $9.40 | $9.10 | $0.2999 | 333,767.0 | +0.21% |
Prothena Corp Plc Stock (PRTA) Year by Year Price History
In this detailed analysis, we present a comprehensive overview of the price movements of Prothena Corp Plc stock over the years. By exploring the year-by-year data, investors can gain valuable insights into the historical performance and volatility of PRTA shares. From significant milestones and fluctuations to notable trends, this in-depth examination of Prothena Corp Plc stock price history provides a foundation for understanding how the company's stock has evolved over time.
Prothena Corp Plc Stock (PRTA) Price History 2026
| Month | High | Low | High - Low | Volume | % Change |
|---|---|---|---|---|---|
| Sep, 2026 | $9.87 | $8.19 | $1.68 | 8,376,498.0 | -11.34% |
| Aug, 2026 | $9.82 | $8.04 | $1.78 | 8,197,556.0 | +15.15% |
| Jul, 2026 | $10.15 | $8.00 | $2.15 | 12,163,406.0 | -17.06% |
| Jun, 2026 | $10.12 | $7.73 | $2.39 | 13,191,376.0 | -3.83% |
| May, 2026 | $11.80 | $9.02 | $2.78 | 11,134,889.0 | -7.96% |
| Apr, 2026 | $11.57 | $9.51 | $2.06 | 8,777,711.0 | +13.79% |
| Mar, 2026 | $10.27 | $8.38 | $1.89 | 13,125,266.0 | +12.11% |
| Feb, 2026 | $9.59 | $8.20 | $1.39 | 7,863,626.0 | -1.59% |
| Jan, 2026 | $10.53 | $8.65 | $1.88 | 10,156,299.0 | -7.75% |
Prothena Corp Plc Stock (PRTA) Price History 2025
| Month | High | Low | High - Low | Volume | % Change |
|---|---|---|---|---|---|
| Dec, 2025 | $11.57 | $9.07 | $2.50 | 15,977,385.0 | -13.40% |
| Nov, 2025 | $11.17 | $9.72 | $1.45 | 11,080,284.0 | +0.00% |
| Oct, 2025 | $11.69 | $9.58 | $2.11 | 14,246,440.0 | +10.14% |
| Sep, 2025 | $9.85 | $8.02 | $1.83 | 16,831,625.0 | +19.02% |
| Aug, 2025 | $8.97 | $6.61 | $2.36 | 24,377,063.0 | +19.36% |
| Jul, 2025 | $7.33 | $5.96 | $1.37 | 18,053,702.0 | +13.18% |
| Jun, 2025 | $6.41 | $4.53 | $1.88 | 37,183,399.0 | +32.24% |
| May, 2025 | $9.50 | $4.32 | $5.18 | 56,710,247.0 | -50.11% |
| Apr, 2025 | $12.45 | $9.00 | $3.45 | 13,642,220.0 | -25.66% |
| Mar, 2025 | $16.05 | $11.78 | $4.27 | 9,041,090.0 | -21.73% |
| Feb, 2025 | $16.66 | $13.15 | $3.51 | 6,536,309.0 | +11.10% |
| Jan, 2025 | $16.64 | $12.39 | $4.25 | 7,635,320.0 | +2.74% |
Prothena Corp Plc Stock (PRTA) Price History 2024
| Month | High | Low | High - Low | Volume | % Change |
|---|---|---|---|---|---|
| Dec, 2024 | $17.66 | $11.70 | $5.96 | 13,893,370.0 | -8.20% |
| Nov, 2024 | $18.77 | $13.22 | $5.55 | 8,760,505.0 | -4.65% |
| Oct, 2024 | $18.88 | $15.30 | $3.58 | 12,799,231.0 | +1.61% |
| Sep, 2024 | $22.83 | $15.52 | $7.31 | 9,584,427.0 | -24.88% |
| Aug, 2024 | $23.66 | $18.99 | $4.67 | 7,120,844.0 | -4.34% |
| Jul, 2024 | $25.42 | $19.55 | $5.87 | 9,094,562.0 | +12.79% |
| Jun, 2024 | $22.81 | $18.69 | $4.12 | 11,583,033.0 | -0.82% |
| May, 2024 | $24.20 | $19.52 | $4.68 | 10,950,137.0 | +2.31% |
| Apr, 2024 | $26.36 | $19.65 | $6.71 | 11,145,523.0 | -17.88% |
| Mar, 2024 | $30.85 | $24.25 | $6.60 | 11,542,717.0 | -10.22% |
| Feb, 2024 | $31.03 | $24.29 | $6.75 | 16,161,111.0 | -2.82% |
| Jan, 2024 | $41.55 | $28.27 | $13.28 | 22,443,182.0 | -21.88% |
3.06%
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