stock
PRTA · PROTHENA CORP PUBLIC LTD CO
What PROTHENA CORP PUBLIC LTD CO reports to the SEC, read from its filings.
Open in the appPrice
The live PRTA price and today's change.
Sign in to see thisChart
Thirty days of daily bars, with signal levels drawn on them.
Sign in to see thisSignals
The latest signal group Nakagai's scanner recorded on PRTA.
Sign in to see thisOptions positioning
Gamma exposure levels from the options market.
Sign in to see thisTechnicals
Trend, momentum and volatility gauges per timeframe.
Sign in to see thisWhat it is
- Industry
- Pharmaceutical Preparations (SIC 2834)
- Filer (SEC EDGAR)
- EDGAR filing index
- Shares outstanding
- 51,336,974 as of 2026-07-30 (XBRL frame CY2026Q2I)
Key stats
Valuation
- P/E
- Locked
- P/S
- Locked
- P/B
- Locked
- Enterprise value
- Locked
- EV/EBIT
- Locked
- FCF yield
- Locked
Margins
- Gross
- —
- Operating
- -101.8%
- Net
- -80.7%
Returns
- ROE
- -15.3%
- ROA
- -14.5%
Health
- Current ratio
- 25.0x
- Debt/equity
- —
Deep value
- NCAV
- $276.32M
- NCAV per share
- $5.38
- Price/NCAV
- Locked
- NNWC
- $272.50M
- NNWC per share
- $5.31
- Price/NNWC
- Locked
Valuation and the price multiples are built on the live price. Trailing twelve months to 2026-06-30; balance sheet at 2026-06-30.
Sign in to see thisDebt is long-term debt and its current portion. Commercial paper and short-term borrowings are not counted.
Results
| Period end | Revenue | Gross profit (not reported by this company) | Operating income | Net income | Filing |
|---|---|---|---|---|---|
| 2026-06-30 | $1.01M | —Gross profit: unreported by this company. | -$21.10M | -$18.58M | 10-Q filed 2026-08-06 |
| 2026-03-31 | $51.08M | —Gross profit: unreported by this company. | $30.04M | $32.72M | 10-Q filed 2026-08-06 Assembled from more than one filing; the filing above is only the newest of them. |
| 2025-12-31 | $21,000 | —Gross profit: unreported by this company. | -$24.20M | -$21.59M | 10-K filed 2026-02-27 Derived: the full year minus the first three quarters, not a figure this filer reported as a quarter. |
| 2025-09-30 | $2.42M | —Gross profit: unreported by this company. | -$40.24M | -$36.54M | 10-Q filed 2025-11-06 |
| 2025-06-30 | $4.42M | —Gross profit: unreported by this company. | -$84.62M | -$125.77M | 10-Q filed 2026-08-06 |
| 2025-03-31 | $2.83M | —Gross profit: unreported by this company. | -$65.58M | -$60.20M | 10-Q filed 2026-08-06 Assembled from more than one filing; the filing above is only the newest of them. |
| 2024-12-31 | $2.12M | —Gross profit: unreported by this company. | -$64.90M | -$57.96M | 10-K filed 2026-02-27 Derived: the full year minus the first three quarters, not a figure this filer reported as a quarter. |
| 2024-09-30 | $970,000 | —Gross profit: unreported by this company. | -$66.51M | -$59.00M | 10-Q filed 2025-11-06 |
- Assets
- $302.58M
- Equity
- $286.89M
Balance as of 2026-06-30.
Ten years
| Fiscal year end | Revenue | Operating income | Net income | Free cash flow |
|---|---|---|---|---|
| 2025-12-31 | $9.68M | -$214.64M | -$244.09M | — |
| 2024-12-31 | $135.16M | -$154.56M | -$122.31M | — |
| 2023-12-31 | $91.37M | -$191.04M | -$147.03M | — |
| 2022-12-31 | $53.91M | -$131.56M | -$116.95M | — |
| 2021-12-31 | $200.58M | $71.97M | $66.97M | — |
| 2020-12-31 | $853,000 | -$112.73M | -$111.14M | — |
| 2019-12-31 | $814,000 | -$85.70M | -$77.68M | — |
| 2018-12-31 | $955,000 | -$158.85M | -$155.65M | — |
| 2017-12-31 | $27.52M | -$155.25M | -$153.24M | — |
| 2016-12-31 | $1.05M | -$159.53M | -$160.11M | — |
Company filings
events
5% owners ()
Fennell Todd W.
Stake update
Fennell Todd W.
Stake update
FMR LLC
Stake update
BlackRock, Inc.
Stake update
Rubric Capital Management LP
Stake update
Insiders, politicians and funds
Insider trades, last 90 days
SCULLY WILLIAM P
10% owner
Buy$1,405,674Sep 30, 5:10 PM ET
SCULLY WILLIAM P
10% owner
Buy$889,872Sep 29, 5:37 PM ET
SCULLY WILLIAM P
10% owner
Buy$843,460Sep 21, 4:23 PM ET
SCULLY WILLIAM P
10% owner
Buy$255,739Sep 3, 6:23 PM ET
SCULLY WILLIAM P
10% owner
Buy$439,430Aug 21, 2:32 PM ET
Politician trades, last 90 days
No politician trades filed in the last 90 days.
Funds
None of the tracked funds held this at their last 13F.
News
Stories that named PRTA, and the market events around them.
Sign in to see thisBoard
Recent signals
Signals open up here once a member has posted about PRTA.
Signals are informational.
Posts · 0
No posts yet.
nakagai
Signals on PRTA come from a rule, not a model.
Nakagai’s scanner records a signal the moment a strategy’s rule matches on the bars. Members read those signals on their own desk, where an agent journals the tape and briefs them in plain English.
Members post on the PRTA board