Prothena Corporation (PRTA) Financial Statements & Analysis

Prothena Corporation (PRTA) Income Statement

Prothena Corporation reported revenue of $9.68M in fiscal 2025 (fiscal year ended Dec 31, 2025), down 92.8% from $135.16M a year earlier. Prothena Corporation posted a net loss of $244.09M, compared with a net loss of $122.31M a year earlier. Gross margin was 100.0% and operating margin -2216.4%. In the most recent quarter, Q2 fiscal 2026 (ended Jun 30, 2026), revenue was $1.01M, down 77.1% from the same quarter a year earlier.

Prothena Corporation Income Statement Analysis

Values in millions USD

Income Statement Balance Sheet Cash Flow Ratios

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Prothena Corporation plc income statement - Annual data in millions USD
Breakdown	FY 2025	FY 2024	FY 2023	FY 2022	FY 2021	FY 2020	FY 2019	FY 2018	FY 2017
Period ending	Dec 2025	Dec 2024	Dec 2023	Dec 2022	Dec 2021	Dec 2020	Dec 2019	Dec 2018	Dec 2017
Revenue & Gross Profit
Revenue	9.68	135.16	91.37	53.91	200.58	0.85	0.81	0.96	27.52
Cost of Revenue	134.85	222.52	0.00	135.56	0.00	74.88	50.84	101.18	134.55
Gross Profit	9.68	135.16	91.37	53.91	200.58	-74.03	-50.02	-100.23	-107.03
Operating Expenses
Research & Development	134.85	222.52	220.57	135.56	82.28	75.09	50.84	101.18	134.55
Selling, General & Administrative	59.39	67.20	61.84	49.90	46.32	38.70	35.74	42.48	48.23
Operating Expenses	224.32	289.72	282.41	185.46	128.60	38.70	35.68	143.67	182.77
Operating Income	-214.64	-154.56	-191.04	-131.56	71.98	-112.73	-85.70	-158.86	-155.25
Other Income/Expense
Interest Income	14.14	25.82	31.01	6.35	0.04	1.37	8.20	6.39	3.55
Interest Expense	0.00	0.00	0.00	0.00	0.00	0.00	0.00	3.70	3.69
Other Income/Expense	13.81	25.63	-0.46	-0.40	-0.10	1.87	8.40	2.74	-2.35
Income
Income Before Tax	-200.83	-128.93	-160.48	-125.61	71.92	-110.86	-77.30	-156.12	-157.60
Income Tax Expense	43.26	-6.62	-13.45	-8.66	4.95	0.28	0.38	-0.47	-4.37
Net Income	-244.09	-122.31	-147.03	-116.95	66.98	-111.14	-77.68	-155.65	-153.24
Net Income - Continuous Operations	-244.09	-122.31	-147.03	-116.95	66.98	-111.14	-77.68	-155.65	-153.24
Net Income - Discontinued Operations	-	-	-	-	-	-	-	-	-
EBITDA	-183.67	-153.67	-190.11	-130.81	73.09	-111.22	-84.19	-152.90	-152.19
EBIT	-184.56	-154.56	-191.04	-131.56	71.98	-	-	-	-
Depreciation & Amortization	0.90	0.89	0.93	0.74	1.12	1.51	1.56	3.22	3.07
Earnings Per Share
Basic EPS	-5.00	-2.00	-3.00	-2.00	2.00	-3.00	-2.00	-4.00	-4.00
Diluted EPS	-5.00	-2.00	-3.00	-2.00	1.00	-3.00	-2.00	-4.00	-4.00
Basic Shares Outstanding	53.83	53.77	53.22	47.37	44.23	39.92	39.88	39.56	37.65
Diluted Shares Outstanding	53.83	53.77	53.22	47.37	48.46	39.92	39.88	39.56	37.65

Source: Company financial statements from annual and quarterly filings. Data as of Jun 30, 2026. Data sources and methodology

Frequently Asked Questions About Prothena Corporation Financial Statements

What was Prothena Corporation's revenue in fiscal 2025?

Prothena Corporation reported revenue of $9.68M in fiscal 2025 (fiscal year ended Dec 31, 2025). That was down 92.8% from $135.16M a year earlier.

Is Prothena Corporation profitable?

No. Prothena Corporation reported a net loss of $244.09M in fiscal 2025. In fiscal 2024 it lost $122.31M.

What is Prothena Corporation's operating margin?

Prothena Corporation's operating income was −$214.64M on revenue of $9.68M in fiscal 2025, an operating margin of -2216.4%, compared with -114.4% a year earlier.

What is net profit margin?

Net profit margin is net income divided by revenue. It shows how much of each dollar of sales a company keeps as profit after all costs, interest and taxes. Full definition