$9.82
Today
as of Sep 4, 16:53 ET
Last 30 days
Recent Press Releases & News
KMDA or PRTA: Which Is the Better Value Stock Right Now?
PRTA's Q2 Loss Narrower Than Expected, Pipeline Progress in Focus
Prothena (PRTA) Reports Q2 Loss, Misses Revenue Estimates
Overview
52-week range
$7.73
$12
51% of range
Avg surprise (last 3)
+59.5%
Avg reaction (last 2)
-4.3%
0% positive
Latest IV / EM
54%
EM ±9.4% · $10 · Sep 18
Earnings trends
EPS — actual vs estimate
Actual Estimate
Revenue vs Net Income
Revenue Net income
Earnings history
| Date | Period | Actual EPS | Est | Surprise | YoY %Δ | Day react | Source |
|---|---|---|---|---|---|---|---|
| Tue Jun 30, 2026 | Jun 2026 | $-0.36 | — | — | — | — | financials |
| Thu May 7, 2026 | Mar/2026 | $0.52 | $-0.31 | +267.7% | +146.4% | -5.9% | earnings |
| Tue Sep 30, 2025 | Sep 2025 | $-0.68 | — | — | — | — | financials |
| Mon Aug 4, 2025 | Jun/2025 | $-1.86 | $-1.11 | -67.6% | — | — | earnings |
| Thu May 8, 2025 | Mar/2025 | $-1.12 | $-0.92 | -21.7% | — | -2.6% | earnings |
| Mon Sep 30, 2024 | Sep 2024 | $-1.10 | — | — | — | — | financials |
| Sun Jun 30, 2024 | Jun 2024 | $1.22 | — | — | — | — | financials |
| Sun Mar 31, 2024 | Mar 2024 | $-1.34 | — | — | — | — | financials |
| Sat Sep 30, 2023 | Sep 2023 | $0.38 | — | — | — | — | financials |
| Fri Jun 30, 2023 | Jun 2023 | $-1.03 | — | — | — | — | financials |
| Fri Mar 31, 2023 | Mar 2023 | $-0.89 | — | — | — | — | financials |
Financials
Income statement (quarterly)
| Metric | Jun 2026 | Mar 2026 | Dec 2025 | Sep 2025 | Jun 2025 | Mar 2025 | Dec 2024 | Sep 2024 |
|---|---|---|---|---|---|---|---|---|
| Revenue | $1M | $51M | — | $2M | $4M | $3M | — | $970,000 |
| Cost of revenue | — | — | — | — | — | — | — | — |
| Gross profit | — | — | — | — | — | — | — | — |
| Operating income | $-21M | $30M | — | $-40M | $-85M | $-66M | — | $-67M |
| Net income | $-19M | $33M | — | $-37M | $-126M | $-60M | — | $-59M |
| EPS (diluted) | $-0.36 | $0.60 | — | $-0.68 | $-2.34 | $-1.12 | — | $-1.10 |
Balance sheet (quarterly)
| Metric | Jun 2026 | Mar 2026 | Dec 2025 | Sep 2025 | Jun 2025 | Mar 2025 | Dec 2024 | Sep 2024 |
|---|---|---|---|---|---|---|---|---|
| Cash & equivalents | $288M | $329M | $308M | $331M | $371M | $418M | $471M | $519M |
| Inventory | — | — | — | — | — | — | — | — |
| Total current assets | $292M | $339M | $315M | $340M | $385M | $436M | $485M | $535M |
| Total assets | $303M | $350M | $327M | $353M | $399M | $495M | $547M | $595M |
| Long-term debt | — | — | — | — | — | — | — | — |
| Total liabilities | $16M | $37M | $46M | $58M | $75M | $58M | $60M | $61M |
| Total equity | $287M | $313M | $280M | $295M | $324M | $438M | $487M | $534M |