stockNASDAQ: PRTA • 28 Days Updates
Prothena Corporation plc (PRTA)
Showing Closing Date Range from Sep 11 to Oct 9, 2026.
Investor Relations:ir.prothena.com
Price & Performance Trajectory
Prothena Corporation plcNASDAQ: PRTA
Latest Close
$8.84
28 Days Updates Trajectory
Showing Closing Date Range from Sep 11 to Oct 9, 2026.Loading trajectory chart...
Click metric scorecards below to toggle price, return %, range & volume curvesPRTA session performance
✓ Latest Close USD
$8.84
Latest session close
$-0.09vs period start
Period Return % % GAIN
-1.01%
Net period trajectory
Cumulative ReturnNormalized
High / Low Range SPREAD
$9.31 / $7.8
Period range envelope
$1.51channel spread
Total Volume SHARES
9.93M
Period turnover
Avg: 584.2K/dLiquidity
Historical Session Ledger
Daily open, high, low, and close prices with volume and period returns.
Historical Quotes & Breakdown(17 dates)
| Date | Close (USD) | Return % | High | Low | Volume |
|---|---|---|---|---|---|
| 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 |
| Sep 25, 2026 | $8.29 | -0.36% | $8.52 | $8.19 | 471.1K |
| Sep 24, 2026 | $8.32 | -4.15% | $8.73 | $8.28 | 426.1K |
| Sep 23, 2026 | $8.68 | -3.45% | $8.97 | $8.67 | 357.8K |
| Sep 22, 2026 | $8.99 | +5.64% | $9.09 | $8.70 | 445.5K |
| Sep 21, 2026 | $8.51 | -0.82% | $8.80 | $8.46 | 361.9K |
| Sep 18, 2026 | $8.58 | +1.42% | $8.60 | $8.25 | 1.83M |
| Sep 17, 2026 | $8.46 | +2.67% | $8.56 | $8.23 | 404.8K |
| Sep 16, 2026 | $8.24 | -1.08% | $8.50 | $8.20 | 398.3K |
| Sep 15, 2026 | $8.33 | -5.98% | $8.86 | $8.30 | 323.4K |
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