Prothena Corporation plc PRTA

Healthcare — Biotechnology

Insider Buys (last 12m)

Insider Buys alert about insiders buying in the last 12 month

Overview Business Profile Analyst Commentary Income Statement Balance Sheet Cash Flow Metrics & Ratios 10-Q 10-K

Quarterly (Descending) Quarterly (Ascending) Annual (Descending) Annual (Ascending) TTM (Descending) TTM (Ascending)

Financial statements are limited to most recent four years or quarters for non-powerpack users

Ten years worth of data (where available), most important trends and XLS exports are available for our Powerpack users.

	Dec '16	Dec '17	Dec '18	Dec '19	Dec '20	Dec '21	Dec '22	Dec '23	Dec '24	Dec '25
P/E ratio	0.00	0.00	0.00	0.00	‡‡‡	‡‡‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡
P/S ratio	1,621.17	51.72	426.66	775.59	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
P/FCF ratio	0.00	0.00	0.00	0.00	‡‡‡	‡‡‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡
P/Operating CF	(50.59)	(36.01)	(19.17)	(43.58)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
P/B ratio	4.68	3.50	1.26	2.31	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Price to Tangible BV	4.68	3.50	1.26	2.31	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
EV/Sales	1,254.42	36.55	(21.15)	342.20	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
EV/EBITDA	0.00	0.00	0.13	0.00	‡‡‡	‡‡‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡
EV/Operating CF	(11.38)	(7.67)	0.71	(5.26)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
EV/FCF	(9.96)	(7.47)	0.67	(5.20)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Quick Ratio	9.42	11.18	28.65	21.21	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Current Ratio	9.53	11.41	28.90	21.36	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Net Debt/EBITDA	2.46	2.74	2.75	4.47	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Debt/Assets	0.00%	0.00%	0.00%	5.47%	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡	‡‡‡	‡‡‡
Debt/Equity	0.00	0.00	0.00	0.08	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡	‡‡‡	‡‡‡
Asset Turnover	0.00	0.06	0.00	0.00	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Operating CF/Net income	0.73	0.86	0.18	0.68	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Capex/Depreciation	(6.86)	(1.15)	(0.54)	(0.08)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Depreciation/Fixed assets	0.04	0.06	0.06	1.76	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Interest Coverage	0.00	0.00	0.00	0.00	‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡
ROE	(44.10%)	(39.67%)	(42.63%)	(26.07%)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
ROA	(37.89%)	(32.05%)	(31.28%)	(16.92%)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
ROIC	0.00%	0.00%	0.00%	0.00%	‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡‡‡	‡‡‡
Cash ROIC	(22.96%)	(22.57%)	(10.81%)	(8.46%)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Return on Tangible Assets	(39.36%)	(34.52%)	(33.17%)	(21.31%)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Accounts Receivable Turnover	3.07	131.67	7.89	23.26	‡‡‡‡‡	‡‡‡	‡‡‡	‡‡‡‡‡	‡‡‡	‡‡‡
Accounts Payable Turnover	0.00	0.00	0.00	0.00	‡‡‡	‡‡‡	‡‡‡‡‡	‡‡‡	‡‡‡	‡‡‡
Inventory Turnover	—	—	—	—	—	—	‡‡‡	—	—	—
Average Days of Receivables	61.58	3.18	0.76	30.49	‡‡‡‡‡	‡‡‡	‡‡‡	‡‡‡‡‡	‡‡‡	‡‡‡
Average Days of Payables	0.00	0.00	0.00	0.00	‡‡‡	‡‡‡	‡‡‡‡‡	‡‡‡	‡‡‡	‡‡‡
Days of Inventory on Hand	—	—	—	—	—	—	‡‡‡	—	—	—
Research and Development Expense of Revenue	11,330.24%	488.92%	10,595.08%	6,245.21%	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Selling, General and Administrative Expense of Revenue	3,891.56%	175.25%	4,448.38%	4,390.17%	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Intangible Assets out of Total Assets	0.00	0.00	0.00	0.00	‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡
Share Based Compensation of Revenue	2,362.94%	97.26%	2,729.01%	2,897.42%	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Graham Net Nets	0.17	0.24	0.63	0.37	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Graham Number	0.00	0.00	0.00	0.00	‡‡‡	‡‡‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡
Earnings Yield	(9.36%)	(10.74%)	(38.25%)	(12.32%)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Free Cash Flow Yield	(7.77%)	(9.46%)	(7.36%)	(8.48%)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Revenue per Share	0.03	0.73	0.02	0.02	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Operating CF per Share	(3.38)	(3.48)	(0.71)	(1.33)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Capex per Share	(0.48)	(0.09)	(0.04)	(0.01)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Free Cash Flow per Share	(3.87)	(3.58)	(0.76)	(1.34)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Cash per Share	11.26	11.09	10.81	9.42	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Shareholders Equity per Share	10.64	10.81	8.17	6.84	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Interest Debt per Share	0.00	0.00	0.00	0.00	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡	‡‡‡	‡‡‡
Book value per Share	10.64	10.81	8.17	6.84	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Free Cash Flow	(132.89)	(134.70)	(30.00)	(53.52)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Working Capital	350.29	388.96	416.46	360.66	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Capital Expenditures	(16.64)	(3.52)	(1.73)	(0.55)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Net Current Asset Value	296.79	337.19	255.59	232.03	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Average Receivables	0.34	0.21	0.12	0.04	‡‡‡‡‡	—	—	‡‡‡‡‡	—	—
Average Payables	8.79	13.35	7.55	1.36	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Average Assets	422.61	478.15	497.56	459.03	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Average Common Equity	363.04	386.30	365.09	297.96	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
EV/EBIT	0.00	0.00	0.13	0.00	‡‡‡	‡‡‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡
Capex to Sales	15.78	0.13	1.81	0.67	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Net Profit Margin	(15,176.11%)	(556.84%)	(16,297.91%)	(9,542.63%)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Price to Operating Income	0.00	0.00	0.00	0.00	‡‡‡	‡‡‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡

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