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 '25	Dec '24	Dec '23	Dec '22	Dec '21	Dec '20	Dec '19	Dec '18	Dec '17	Dec '16
P/E ratio	0.00	0.00	0.00	0.00	‡‡‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡
P/S ratio	53.08	5.51	22.45	47.01	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
P/FCF ratio	0.00	0.00	0.00	0.00	‡‡‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡
P/Operating CF	(22.05)	(15.59)	(40.18)	(509.29)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
P/B ratio	1.83	1.53	3.65	4.07	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Price to Tangible BV	1.83	1.53	3.65	4.07	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
EV/Sales	22.44	2.10	15.78	33.98	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
EV/EBITDA	0.00	0.00	0.00	0.00	‡‡‡‡‡	‡‡‡	‡‡‡	‡‡‡‡‡	‡‡‡	‡‡‡
EV/Operating CF	(1.33)	(1.89)	(10.76)	(16.83)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
EV/FCF	(1.33)	(1.89)	(10.55)	(16.76)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Quick Ratio	7.53	9.72	10.99	14.17	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Current Ratio	7.72	10.01	11.24	14.34	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Net Debt/EBITDA	1.46	3.12	3.40	5.64	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Debt/Assets	0.00%	0.00%	0.00%	0.85%	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡	‡‡‡	‡‡‡
Debt/Equity	0.00	0.00	0.00	0.01	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡	‡‡‡	‡‡‡
Asset Turnover	0.02	0.22	0.13	0.08	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Operating CF/Net income	0.67	1.23	0.91	0.93	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Capex/Depreciation	(0.04)	(0.08)	(0.33)	(0.07)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Depreciation/Fixed assets	1.73	1.16	2.19	3.89	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Interest Coverage	0.00	0.00	0.00	0.00	‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡
ROE	(63.62%)	(23.34%)	(24.85%)	(21.50%)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
ROA	(55.86%)	(19.67%)	(20.22%)	(17.11%)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
ROIC	0.00%	(621.71%)	0.00%	0.00%	‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡
Cash ROIC	(28.18%)	(15.98%)	(11.66%)	(8.26%)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Return on Tangible Assets	(88.28%)	(27.80%)	(25.08%)	(17.44%)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Accounts Receivable Turnover	0.00	0.00	35.32	0.00	‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Accounts Payable Turnover	0.00	0.00	0.00	1.04	‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡
Inventory Turnover	—	—	—	0.00	—	—	—	—	—	—
Average Days of Receivables	0.00	0.00	20.61	0.00	‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Average Days of Payables	0.00	0.00	0.00	501.94	‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡
Days of Inventory on Hand	—	—	—	0.00	—	—	—	—	—	—
Research and Development Expense of Revenue	1,392.52%	164.64%	241.40%	251.48%	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Selling, General and Administrative Expense of Revenue	613.30%	49.72%	67.68%	92.57%	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Intangible Assets out of Total Assets	0.00	0.00	0.00	0.00	‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡
Share Based Compensation of Revenue	388.68%	34.01%	44.78%	58.11%	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Graham Net Nets	0.52	0.57	0.25	0.23	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Graham Number	0.00	0.00	0.00	0.00	‡‡‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡
Earnings Yield	(47.54%)	(16.46%)	(7.19%)	(4.67%)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Free Cash Flow Yield	(31.85%)	(20.19%)	(6.66%)	(4.31%)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Revenue per Share	0.18	2.51	1.72	1.14	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Operating CF per Share	(3.04)	(2.79)	(2.52)	(2.30)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Capex per Share	0.00	(0.01)	(0.05)	(0.01)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Free Cash Flow per Share	(3.04)	(2.80)	(2.57)	(2.31)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Cash per Share	5.71	8.77	11.65	15.00	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Shareholders Equity per Share	5.21	9.06	10.55	13.13	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Interest Debt per Share	0.00	0.00	0.00	0.00	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡	‡‡‡	‡‡‡
Book value per Share	5.21	9.06	10.55	13.13	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Free Cash Flow	(163.72)	(150.35)	(136.68)	(109.28)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Working Capital	274.35	436.91	582.39	668.95	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Capital Expenditures	(0.14)	(0.30)	(2.77)	(0.46)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Net Current Asset Value	268.86	425.23	504.27	583.11	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Average Receivables	—	—	2.59	—	—	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Average Payables	6.82	16.58	17.33	6.48	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Average Assets	436.96	621.75	727.21	683.70	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Average Common Equity	383.70	524.15	591.70	544.04	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
EV/EBIT	0.00	0.00	0.00	0.00	‡‡‡‡‡	‡‡‡	‡‡‡	‡‡‡‡‡	‡‡‡	‡‡‡
Capex to Sales	0.01	0.00	0.03	0.01	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Net Profit Margin	(2,520.57%)	(90.49%)	(160.91%)	(216.95%)	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡	‡‡‡‡‡
Price to Operating Income	0.00	0.00	0.00	0.00	‡‡‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡	‡‡‡

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