Prothena Corporation plc (PRTA)
Showing Closing Date Range from Oct 15 to Oct 22, 2026 compared to Oct 7 to Oct 14, 2026.
Compare Last 7 Days with Previous Period
Investor Relations:ir.prothena.com
Current Period Close
$8.25
Oct 15, 2026 - Oct 22, 2026
Previous Period Close
$8.37
Oct 07, 2026 - Oct 14, 2026
Net Comparison Delta
$-0.12 (-1.43%)
Relative performance vs prior benchmark
Historical Quotes & Breakdown(6 dates)
| Current Date | Current Close | Previous Date | Previous Close | Delta (%) |
|---|---|---|---|---|
| Oct 22, 2026 | $8.25 | Oct 14, 2026 | $8.37 | -1.43% |
| Oct 21, 2026 | $8.03 | Oct 13, 2026 | $8.36 | -3.95% |
| Oct 20, 2026 | $8.50 | Oct 12, 2026 | $8.43 | +0.83% |
| Oct 19, 2026 | $8.48 | Oct 09, 2026 | $8.84 | -4.07% |
| Oct 16, 2026 | $8.35 | Oct 08, 2026 | $8.61 | -3.02% |
| Oct 15, 2026 | $8.50 | Oct 07, 2026 | $8.48 | +0.24% |