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NASDAQ · Health careProthena Corp Public Ltd Co (PRTA)
Prothena Corp Public Ltd Co brought in $54.5M of revenue over the twelve months to June 30, 2026, up 427.3% from a year earlier. It posted a net loss of $44M. At June 30, 2026 it held $288.2M in cash. Its latest periodic report to the SEC is the quarterly report (10-Q) filed on August 6, 2026.
What Prothena Corp Public Ltd Co does
Prothena Corp Public Ltd Co is registered with the SEC under industry code SIC 2834 (Pharmaceutical Preparations). Its shares trade on NASDAQ under the ticker PRTA.
Revenue and profit by year
Key figures
| Fiscal year | Revenue | Net income | Diluted EPS | Free cash flow |
|---|---|---|---|---|
| 2025 | $9.7M | -$244.1M | -$4.53 | n/a |
| 2024 | $135.2M | -$122.3M | -$2.27 | n/a |
| 2023 | $91.4M | -$147M | -$2.76 | n/a |
| 2022 | $53.9M | -$116.9M | -$2.47 | n/a |
| 2021 | $200.6M | $67M | $1.38 | n/a |
| 2020 | $853K | -$111.1M | -$2.78 | n/a |
Latest SEC filings
What Prothena Corp Public Ltd Co has filed recently, newest first. Each links to the original document on SEC EDGAR.
- August 19, 2026Passive stake changed SCHEDULE 13G/A
- August 14, 2026Passive stake changed SCHEDULE 13G/A
- August 6, 2026Quarterly report 10-Q · period to June 30, 2026
- August 6, 2026
- August 6, 2026Passive stake changed SCHEDULE 13G/A
- July 29, 2026Passive stake changed SCHEDULE 13G/A
- May 15, 2026
- May 15, 2026Passive stake changed SCHEDULE 13G/A
- May 11, 2026Passive stake changed SCHEDULE 13G/A
- May 7, 2026Quarterly report 10-Q · period to March 31, 2026
Questions about PRTA
What does Prothena Corp Public Ltd Co do?
Prothena Corp Public Ltd Co is registered with the SEC under industry code SIC 2834 (Pharmaceutical Preparations). Its shares trade on NASDAQ under the ticker PRTA.
Is Prothena Corp Public Ltd Co profitable?
No. Over the twelve months to June 30, 2026 it reported a net loss of $44M on revenue of $54.5M.
How much revenue does Prothena Corp Public Ltd Co make?
Over the twelve months to June 30, 2026 Prothena Corp Public Ltd Co reported revenue of $54.5M. That is 427.3% more than a year earlier.
When did Prothena Corp Public Ltd Co last report?
Its most recent periodic report is the quarterly report (10-Q) filed on August 6, 2026. It covers the period to June 30, 2026. Its newest filing of any kind is the insider trade from September 21, 2026.
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Follow PRTA: get an email when it filesWhere the numbers come from
Financial figures are the values Prothena Corp Public Ltd Co tagged in its own SEC filings (XBRL), taken from the latest filing for each period, so restatements replace older figures. Revenue, profit and cash flow are for full fiscal years unless marked as the last twelve months, which is the sum of the four most recent quarters. Where a company reports only the full year, the fourth quarter is the year minus the first three.
Prices are delayed end-of-day market data in the listing currency, and market cap moves with the price. P/E is shown only when earnings per share are positive. Nothing here is investment advice.