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

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

Fold the line items

Columns are period end dates

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