stockNASDAQ: PRTA • 12 Months Updates
Prothena Corporation plc (PRTA) 12 Months
Showing Closing Date Range from Oct 22, 2025 to Oct 22, 2026.
Investor Relations:ir.prothena.com
Price & Performance Trajectory
Prothena Corporation plcNASDAQ: PRTA
Latest Close
$8.25
12 Months Updates Trajectory
Showing Closing Date Range from Oct 22, 2025 to Oct 22, 2026.Loading trajectory chart...
Click metric scorecards below to toggle price, return %, range & volume curvesPRTA session performance
✓ Latest Close USD
$8.25
Latest session close
$-1.63vs period start
Period Return % % GAIN
-16.5%
Net period trajectory
Cumulative ReturnNormalized
High / Low Range SPREAD
$11.8 / $7.73
Period range envelope
$4.07channel spread
Total Volume SHARES
133.59M
Period turnover
Avg: 538.7K/dLiquidity
Historical Session Ledger
Daily open, high, low, and close prices with volume and period returns.
Historical Quotes & Breakdown(248 dates)
| Date | Close (USD) | Return % | High | Low | Volume |
|---|---|---|---|---|---|
| Oct 22, 2026 | $8.25 | +2.74% | $8.28 | $7.96 | 381.8K |
| Oct 21, 2026 | $8.03 | -5.53% | $8.54 | $8.01 | 461.4K |
| Oct 20, 2026 | $8.50 | +0.24% | $8.65 | $8.45 | 525.3K |
| Oct 19, 2026 | $8.48 | +1.56% | $8.56 | $8.31 | 361.1K |
| Oct 16, 2026 | $8.35 | -1.76% | $8.61 | $8.24 | 670.2K |
| Oct 15, 2026 | $8.50 | +1.55% | $8.65 | $8.44 | 358.3K |
| Oct 14, 2026 | $8.37 | +0.12% | $8.56 | $8.19 | 618.3K |
| Oct 13, 2026 | $8.36 | -0.83% | $8.55 | $8.20 | 573.2K |
| Oct 12, 2026 | $8.43 | -4.64% | $8.81 | $8.40 | 489.8K |
| Oct 09, 2026 | $8.84 | +2.67% | $9.31 | $8.56 | 931.6K |
| Oct 08, 2026 | $8.61 | +1.53% | $8.81 | $8.36 | 642.4K |
| Oct 07, 2026 | $8.48 | +5.74% | $8.63 | $7.88 | 690.4K |
| Oct 06, 2026 | $8.02 | -3.02% | $8.28 | $7.80 | 506.2K |
| Oct 05, 2026 | $8.27 | -1.08% | $8.37 | $7.91 | 714.5K |
| Oct 02, 2026 | $8.36 | -2.11% | $8.62 | $8.35 | 675.8K |
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