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8.35
1.76%
-0.15
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 October 16, 2026, is $8.35.
- 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 93.29% to $8.35 now.
- The 52-week high stock price for PRTA is $11.80, representing a 41.32% increase from the current share price, occurred on May 08, 2026.
- The 52-week low stock price for PRTA is $7.73, indicating a -7.43% 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 $13.67. The stock closed the year at $9.55, a loss of over -30.14% 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 |
|---|---|---|---|---|---|
| Oct 16, 2026 | $8.62 | $8.24 | $0.38 | 670,248.0 | -1.76% |
| Oct 15, 2026 | $8.65 | $8.44 | $0.21 | 358,380.0 | +1.55% |
| Oct 14, 2026 | $8.56 | $8.19 | $0.37 | 620,027.0 | +0.12% |
| Oct 13, 2026 | $8.55 | $8.20 | $0.35 | 573,313.0 | -0.83% |
| Oct 12, 2026 | $8.81 | $8.39 | $0.415 | 489,761.0 | -4.64% |
| Oct 09, 2026 | $9.30 | $8.50 | $0.805 | 931,626.0 | +2.67% |
| Oct 08, 2026 | $8.81 | $8.36 | $0.45 | 642,408.0 | +1.53% |
| Oct 07, 2026 | $8.63 | $7.88 | $0.75 | 690,413.0 | +5.74% |
| Oct 06, 2026 | $8.28 | $7.80 | $0.48 | 510,608.0 | -3.02% |
| Oct 05, 2026 | $8.37 | $7.91 | $0.46 | 714,463.0 | -1.08% |
| Oct 02, 2026 | $8.62 | $8.35 | $0.27 | 675,839.0 | -2.11% |
| Oct 01, 2026 | $8.58 | $8.35 | $0.23 | 457,092.0 | +1.91% |
| Sep 30, 2026 | $8.99 | $8.37 | $0.625 | 634,780.0 | -4.56% |
| Sep 29, 2026 | $8.80 | $8.59 | $0.21 | 543,122.0 | +0.69% |
| Sep 28, 2026 | $8.86 | $8.07 | $0.7867 | 488,859.0 | +5.19% |
| Sep 25, 2026 | $8.52 | $8.19 | $0.335 | 481,049.0 | -0.36% |
| Sep 24, 2026 | $8.73 | $8.28 | $0.45 | 426,062.0 | -4.15% |
| Sep 23, 2026 | $8.97 | $8.66 | $0.305 | 357,843.0 | -3.45% |
| Sep 22, 2026 | $9.09 | $8.70 | $0.39 | 445,501.0 | +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% |
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 |
|---|---|---|---|---|---|
| Oct, 2026 | $9.30 | $7.80 | $1.50 | 7,334,178.0 | -0.36% |
| Sep, 2026 | $9.87 | $8.07 | $1.80 | 9,622,241.0 | -10.37% |
| 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% |
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