Prothena Corporation plc (PRTA)

Prothena Corporation Ratios and Metrics

Market cap in millions USD. Fiscal year is January - December.

Fiscal Year	Current	FY 2024	FY 2023	FY 2022	FY 2021	FY 2020
Period Ending	Jan 8, 2026	Dec 31, 2024	Dec 31, 2023	Dec 31, 2022	Dec 31, 2021	Dec 31, 2020
Market Capitalization	487	745	1,950	3,111	2,302	479
Market Cap Growth	-40.52%	-61.79%	-37.30%	35.14%	380.07%	-24.08%
Enterprise Value	165	237	1,290	2,623	1,715	184
Last Close Price	9.05	13.85	36.34	60.25	49.40	12.01
PE Ratio	-	-	-	-	34.37	-
PS Ratio	41.33	5.51	21.34	57.70	11.48	562.08
PB Ratio	1.65	1.53	3.47	5.00	4.94	2.61
P/TBV Ratio	1.65	1.53	3.47	5.00	4.94	2.61
P/FCF Ratio	-	-	-	-	25.01	-
P/OCF Ratio	-	-	-	-	24.86	-
EV/Sales Ratio	14.03	1.76	14.12	48.66	8.55	215.82
EV/EBITDA Ratio	-	-	-	-	23.47	-
EV/EBIT Ratio	-	-	-	-	23.83	-
EV/FCF Ratio	-	-	-	-	18.64	-
Debt / Equity Ratio	0.03	0.02	0.02	0.01	0.03	0.10
Debt / EBITDA Ratio	-	-	-	-	0.16	-
Debt / FCF Ratio	-	-	-	-	0.13	-
Asset Turnover	0.03	0.22	0.13	0.08	0.43	0.00
Quick Ratio	6.43	9.72	10.97	14.17	17.31	11.43
Current Ratio	6.61	10.01	11.24	14.34	17.48	11.58
Return on Equity (ROE)	-67.63%	-23.34%	-24.85%	-21.50%	20.61%	-48.65%
Return on Assets (ROA)	-29.31%	-15.54%	-16.42%	-12.03%	9.55%	-18.73%
Return on Capital (ROIC)	-32.69%	-18.04%	-19.87%	-14.86%	13.23%	-28.31%
Return on Capital Employed (ROCE)	-73.80%	-31.00%	-29.90%	-18.60%	12.50%	-36.70%
Earnings Yield	-57.57%	-16.41%	-7.54%	-3.76%	2.91%	-23.18%
FCF Yield	-38.64%	-20.17%	-7.01%	-3.51%	4.00%	-16.80%
Buyback Yield / Dilution	-0.17%	-1.04%	-12.34%	2.26%	-21.42%	-0.08%

Updated Sep 30, 2025. Source: S&P Global Market Intelligence. Standard template. Financial Sources.

SEC Filings: 10-K · 10-Q