Quick Answer
PROTHENA CORP PUBLIC LTD CO reported R&D Expense of $134.85 million for fiscal year 2025.
PROTHENA CORP PUBLIC LTD CO R&D Expense — Annual History
| Fiscal Year | R&D Expense | YoY Change |
|---|---|---|
| 2025 | $134.85M | -39.4% |
| 2024 | $222.52M | +0.9% |
| 2023 | $220.57M | +62.7% |
| 2022 | $135.56M | +64.7% |
| 2021 | $82.28M | +9.9% |
| 2020 | $74.88M | +47.3% |
| 2019 | $50.84M | -49.8% |
| 2018 | $101.18M | -24.8% |
| 2017 | $134.55M | +12.6% |
| 2016 | $119.53M | +104.5% |
| 2015 | $58.44M | +52.0% |
| 2014 | $38.45M | +47.6% |
| 2013 | $26.05M | -23.7% |
| 2012 | $34.14M | +41.2% |
| 2011 | $24.17M | — |
Quarterly R&D Expense
| Quarter Ending | R&D Expense | YoY | QoQ |
|---|---|---|---|
| September 30, 2025 | $28.94M | -42.9% | -28.6% |
| June 30, 2025 | $40.52M | -29.5% | -20.3% |
| March 31, 2025 | $50.81M | -20.7% | +0.2% |
| September 30, 2024 | $50.72M | -12.4% | -11.8% |
| June 30, 2024 | $57.51M | +2.7% | -10.3% |
| March 31, 2024 | $64.11M | +43.3% | +10.7% |
| September 30, 2023 | $57.91M | +45.3% | +3.4% |
| June 30, 2023 | $56.01M | +77.4% | +25.1% |
- PROTHENA CORP PUBLIC LTD CO showed a decrease of -39.4% in R&D Expense compared to the prior fiscal year.
- Over the 2011–2025 period, PROTHENA CORP PUBLIC LTD CO’s r&d expense has grown by 457.9% (from $24.17 million to $134.85 million).
- The most recent figure is from PROTHENA CORP PUBLIC LTD CO’s fiscal year 2025 report (Form 10-K), filed with the SEC on February 27, 2026.
- All figures are sourced from SEC EDGAR XBRL filings, last verified June 17, 2026.
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