Filing Flows › Prothena Corp Public (PRTA) › Q3 2025
Prothena Corp Public (PRTA) Q3 2025 earnings results (third quarter 2025)
10-Q filed Nov 6, 2025
Prothena Corp Public (PRTA) reported revenue of $2.4M for the third quarter 2025 (Q3 2025), +149% from a year earlier and -45% from the quarter before.
Prothena Corp Public, Q3 2025: revenue $2.4M (+149% year over year), net loss $36.5M, operating cash flow −$40.6M. The chart follows the revenue to costs, profit and cash.
| Q3 2025 | Amount | Q/Q | Y/Y |
|---|---|---|---|
| Revenue | $2.4M | -45% | +149% |
| Operating profit | −$40.2M | — | — |
| Net earnings | −$36.5M | — | — |
| Operating cash flow | −$40.6M | — | — |
What changed
Revenue was $2.4M in Q3 2025, up 149% year over year and down 45% from the previous quarter.
Operating costs exceeded revenue by $40.2M, an operating margin of -1666.3%. Total costs fell 37% while revenue rose 149%. The quarter ended with a net loss of $36.5M, narrower than the previous quarter's $125.8M loss.
Operating cash flow was −$40.6M. Non-cash charges added back $229K of depreciation and amortization and $7.2M of share-based compensation. Working capital and other items used $11.5M. Capital expenditures of $10K exceeded it, leaving free cash flow of −$40.6M.
Questions
What was Prothena Corp Public's revenue in the third quarter 2025?
Prothena Corp Public (PRTA) reported revenue of $2.4M for the third quarter 2025 (Q3 2025), +149% from a year earlier and -45% from the quarter before.