Prothena Corp Public Ltd Co (PRTA)

Name: Prothena Corp Public Ltd Co (PRTA) annual fundamentals
Creator: TickerFacts
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SEC name PROTHENA CORP PUBLIC LTD CO · CIK 0001559053 · Nasdaq · Pharmaceutical Preparations

Sector Manufacturing
Fiscal year ends Dec 31

For the year ended 2025-12-31, Prothena Corp Public Ltd Co reported revenue of $9.68M. Revenue fell 92.8% from the prior annual period. Over the twelve months to 2026-06-30, revenue was $54.53M.

Key ratios (year ended 2025-12-31)

n/m

Operating margin

n/m

Net margin

-87.0%

Return on year-end equity

-92.8%

Revenue growth (YoY)

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Latest selected filing: Form 4 (ownership change) · 2026-10-15

Annual financials

Annual flows and balances are grouped by their actual period end. Select a figure to open its SEC filing. n/a means a matching observation is unavailable. Free cash flow is operating cash flow minus capital expenditures, and EBITDA is operating income plus depreciation and amortization, for the same period, computed by TickerFacts.

The first column covers the twelve months to 2026-06-30 from the latest quarterly report: flows are the last fiscal year plus this year to date minus the same months a year earlier, and balances are as of that date. Per-share figures are annual only.

Period ended	TTM to 2026-06-30	2025-12-31	2024-12-31	2023-12-31	2022-12-31	2021-12-31	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31
Revenue	$54.53M	$9.68M	$135.16M	$91.37M	$53.91M	$200.58M	$853.0K	$814.0K	$955.0K	$27.52M	$1.05M
R&D Expense	$64.95M	$134.85M	$222.52M	$220.57M	$135.56M	$82.28M	$74.88M	$50.84M	$101.18M	$134.55M	$119.53M
Operating Income	-$55.51M	-$214.64M	-$154.56M	-$191.04M	-$131.56M	$71.97M	-$112.73M	-$85.70M	-$158.85M	-$155.25M	-$159.53M
Depreciation & Amortization	$828.0K	$895.0K	$893.0K	$928.0K	$744.0K	$1.11M	$1.51M	$1.56M	$3.22M	$3.07M	$2.43M
EBITDA	-$54.68M	-$213.75M	-$153.67M	-$190.11M	-$130.81M	$73.09M	-$111.22M	-$84.13M	-$155.64M	-$152.19M	-$157.11M
Net Income	-$43.99M	-$244.09M	-$122.31M	-$147.03M	-$116.95M	$66.97M	-$111.14M	-$77.68M	-$155.65M	-$153.24M	-$160.11M
EPS (Diluted)	n/a	-$4.53	-$2.27	-$2.76	-$2.47	$1.38	-$2.78	-$1.95	n/a	n/a	n/a
Total Assets	$302.58M	$326.80M	$547.11M	$696.38M	$758.03M	$609.37M	$332.98M	$419.27M	$498.80M	$496.33M	$459.98M
Total Liabilities	$15.69M	$46.33M	$60.18M	$135.02M	$135.99M	$143.32M	$148.97M	$146.35M	$175.80M	$89.14M	$94.57M
Shareholders' Equity	$286.89M	$280.47M	$486.93M	$561.37M	$622.04M	$466.04M	$184.01M	$272.92M	$323.00M	$407.19M	$365.40M
Cash & Equivalents	$288.19M	$307.53M	$471.39M	$618.83M	$710.41M	$579.09M	$295.38M	$375.72M	$427.66M	$417.62M	$386.92M
Operating Cash Flow	-$60.05M	-$163.58M	-$150.05M	-$133.91M	-$108.82M	$92.61M	-$80.36M	-$52.97M	-$28.28M	-$131.18M	-$116.25M
Shares Outstanding	51.74M	53.83M	53.83M	53.68M	52.10M	46.66M	39.92M	39.90M	39.86M	38.48M	34.75M
Weighted Average Diluted Shares	n/a	53.83M	53.77M	53.22M	47.37M	48.46M	39.91M	39.88M	n/a	n/a	n/a
EPS (Basic)	n/a	-$4.53	-$2.27	-$2.76	-$2.47	$1.51	-$2.78	-$1.95	n/a	n/a	n/a

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