Prothena Corp Public (PRTA) Return on Assets [ROA] (2013 - 2026)
Prothena Corp Public (PRTA) recorded Return on Assets [ROA] of -13.46% in Q2 2026, up 54.28 percentage points from -67.74% a year earlier and up 31.20 percentage points from the prior quarter.
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Analysis
Prothena Corp Public (PRTA) Return on Assets [ROA] (2013 - 2026) Analysis & Trends
For FY2025, Prothena Corp Public reported Return on Assets [ROA] of -55.86%, down 36.19 percentage points from FY2024.
- Annual Return on Assets [ROA] has a five-year change of -26.31 percentage points (FY2020 to FY2025).
- Across earlier years, Return on Assets [ROA] came in at -19.67% in FY2024 (+0.55 pp), -20.22% in FY2023 (-3.11 pp), -17.11% in FY2022 (-31.32 pp) and 14.21% in FY2021 (+43.76 pp).
- The Q2 2026 figure is the highest quarterly Return on Assets [ROA] since Q2 2024.
- On a year-over-year basis, Return on Assets [ROA] rose in two of the last eight quarters, with an average year-over-year change of -17.51 percentage points.
- Peak year-over-year performance for Return on Assets [ROA] in the last five years was a gain of 54.28 percentage points in Q2 2026, against a drop of 59.71 percentage points in Q2 2025 at the low end.
- Per Business Quant, the preceding three quarters came in at -44.66% (Q1 2026), -71.82% (Q4 2025) and -74.61% (Q3 2025).
Peer Set
Peer Comparison
| # | Company | Market Cap | Enterprise Value | Gross Profit (Qtr) | ROA (Qtr) |
|---|---|---|---|---|---|
| 1 | Eli Lilly | 1,348.13 Bn | 1,321.74 Bn | 20.46 Bn | 19.00% |
| 2 | Johnson & Johnson | 675.90 Bn | 595.76 Bn | 17.30 Bn | 8.08% |
| 3 | AbbVie | 519.45 Bn | 487.50 Bn | 13.12 Bn | 7.32% |
| 4 | Merck | 364.95 Bn | 327.95 Bn | 13.19 Bn | 1.87% |
| 5 | Novartis Ag | 311.58 Bn | 285.16 Bn | - | - |
| 6 | Astrazeneca | 289.34 Bn | 262.94 Bn | 13.26 Bn | 9.36% |
| 7 | Amgen | 251.64 Bn | 203.30 Bn | 7.58 Bn | 9.80% |
| 8 | Gilead Sciences | 212.05 Bn | 187.07 Bn | 6.73 Bn | -7.67% |
| 9 | Pfizer | 167.35 Bn | 115.00 Bn | 12.56 Bn | 2.00% |
| 10 | Prothena Corp Public | 439.48 Mn | -757.15 Mn | - | -8.16% |
Historic Data
Download Data
Historic Data
| Date | Value |
|---|---|
| Sep 30, 2026 | -8.16% |
| Jun 30, 2026 | -13.46% |
| Mar 31, 2026 | -44.66% |
| Dec 31, 2025 | -71.82% |
| Sep 30, 2025 | -74.61% |
| Jun 30, 2025 | -67.74% |
| Mar 31, 2025 | -21.16% |
| Dec 31, 2024 | -21.42% |
| Sep 30, 2024 | -21.25% |
| Jun 30, 2024 | -8.03% |
| Mar 31, 2024 | -26.13% |
| Dec 31, 2023 | -20.37% |
| Sep 30, 2023 | -9.98% |
| Jun 30, 2023 | -19.27% |
| Mar 31, 2023 | -17.01% |
| Dec 31, 2022 | -17.82% |
| Sep 30, 2022 | -28.33% |
| Jun 30, 2022 | -0.25% |
| Mar 31, 2022 | 11.33% |
| Dec 31, 2021 | 10.78% |
API Access
Prothena Corp Public Return on Assets [ROA] API
Pull this series into your own models, spreadsheets and apps with the Business Quant
Historical Metrics API. The request below matches the chart above — change the
frequency, period or values and it follows. Swap YOUR_API_KEY for your own key.
https://data.businessquant.com/historic?slug=return-on-assets-%5Broa%5D&ticker=PRTA&period=max&api_key=YOUR_API_KEYimport requests
url = "https://data.businessquant.com/historic"
params = {"slug": "return-on-assets-[roa]", "ticker": "PRTA", "period": "max", "api_key": "YOUR_API_KEY"}
data = requests.get(url, params=params).json()const res = await fetch("https://data.businessquant.com/historic?slug=return-on-assets-%5Broa%5D&ticker=PRTA&period=max&api_key=YOUR_API_KEY");
const data = await res.json();