Tuesday 13 October 2026 Export PRTA’s income statement to Excel — free account

Prothena Corporation plc

Prothena Corporation plc’s revenue for fiscal 2025 (year ended December 2025) was $9.7 million, down 92.8% from fiscal 2024. In the quarter to June 2026, revenue fell 77.2%, EPS grew 84.6% and free cash flow grew 44.6%, each against the same quarter a year earlier. Insiders bought in the last twelve months.

8.42 0.01 −0.12%

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Market cap: $432.8M
P/E: 0.0×
Fwd P/E: 188×
Dividend yield: —
F-score: 2/9
Altman Z: −0.24
Beneish M: n/a
Dividend safety: n/a

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

	Jun '26	Mar '26	Dec '25	Sep '25	Older periods
P/E ratio Full definition →	0.00	0.00	0.00	0.00	+8 more quarters Free account
P/S ratio Full definition →	9.36	9.01	53.08	44.58
P/FCF ratio Full definition →	0.00	0.00	0.00	0.00
P/Operating CF Full definition →	(20.38)	18.08	(22.05)	(12.95)
P/B ratio Full definition →	1.78	1.67	1.83	1.78
Price to Tangible BV Full definition →	1.78	1.67	1.83	1.78
EV/Sales Full definition →	4.08	3.32	21.33	16.51
EV/EBITDA Full definition →	0.00	0.00	0.00	0.00
EV/Operating CF Full definition →	(3.70)	(2.37)	(1.26)	(1.03)
EV/FCF Full definition →	(3.66)	(2.36)	(1.26)	(1.03)
Quick Ratio Full definition →	24.72	10.13	7.53	6.43
Current Ratio Full definition →	25.05	10.43	7.72	6.61
Net Debt/EBITDA Full definition →	14.28	(10.64)	13.22	8.42
Debt/Assets Full definition →	0.00%	0.00%	0.00%	0.00%
Debt/Equity Full definition →	0.00	0.00	0.00	0.00
Asset Turnover Full definition →	0.16	0.14	0.02	0.02
Operating CF/Net income Full definition →	1.35	0.88	1.08	1.11
Capex/Depreciation Full definition →	(0.71)	0.00	0.00	(0.01)
Research and Development Expense of Revenue Full definition →	871.09%	24.72%	69,457.14%	1,198.26%
Selling, General and Administrative Expense of Revenue Full definition →	1,079.11%	24.79%	60,219.05%	548.16%
Intangible Assets out of Total Assets Full definition →	0.00	0.00	0.00	0.00
Share Based Compensation of Revenue Full definition →	780.00%	13.54%	33,685.71%	298.10%
Graham Net Nets Full definition →	0.54	0.58	0.52	0.54
Graham Number Full definition →	0.00	0.00	0.00	0.00
Earnings Yield Full definition →	(8.48%)	(28.91%)	(47.54%)	(53.48%)
Free Cash Flow Yield Full definition →	(11.91%)	(15.61%)	(31.85%)	(35.83%)
Revenue per Share Full definition →	0.02	0.95	0.00	0.04
Operating CF per Share Full definition →	(0.48)	0.54	(0.43)	(0.75)
Capex per Share Full definition →	(0.01)	0.00	0.00	0.00
Free Cash Flow per Share Full definition →	(0.49)	0.54	(0.43)	(0.75)
Cash per Share Full definition →	5.53	6.13	5.71	6.15
Shareholders Equity per Share Full definition →	5.50	5.82	5.21	5.48
Interest Debt per Share Full definition →	0.00	0.00	0.00	0.00
Book value per Share Full definition →	5.50	5.82	5.21	5.48
Free Cash Flow Full definition →	(25.70)	28.88	(23.31)	(40.57)
Working Capital Full definition →	280.36	306.68	274.35	288.54
Capital Expenditures Full definition →	(0.65)	—	0.00	(0.01)
Net Current Asset Value Full definition →	276.33	301.92	268.86	282.34
EV/EBIT Full definition →	0.00	0.00	0.00	0.00
Capex to Sales Full definition →	0.65	0.00	0.00	0.00
Price to Operating Income Full definition →	0.00	0.00	0.00	0.00
Other line items
Average Payables Full definition →	7.07	10.16	6.82	10.42
Average Assets Full definition →	350.82	422.62	436.96	473.94
Average Common Equity Full definition →	305.61	375.15	383.70	414.68

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Columns are period end dates

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