Skip to content
stoqly
en

Popular

All languages

Figures come from SEC filings, which are in English. Company and industry names stay as filed.

$ USD

Popular

All currencies

Data is in US dollars, converted at the ECB reference rate of Oct 23, 2026.

Prothena Corp Public Ltd Co

PRTA Nasdaq Pharmaceutical Preparations Financials FY2016โ€“FY2025

Last close ยท Oct 23, 2026

$8.20

0.6%
Compare
Revenue Total sales reported in the income statement.
$9.7M
92.8% vs prior year
Operating margin Operating income as a share of revenue.
โˆ’2,216.4%
2,102.1ย pts
Net income Profit after all expenses, interest and tax.
โˆ’$244M
Free cash flow Cash from operations minus capital spending.
โ€”
Return on capital After-tax operating income as a share of the money invested in the business: debt plus equity, minus cash.
โ€”
Market cap Last close times the latest diluted share count, so it is approximate.
$428M
Oct 23 close
P/E Last close divided by diluted earnings per share over the last four quarters.
โ€”
On โˆ’$0.83 EPS (TTM)

What Prothena Corp Public Ltd Co does

No business description yet.

Legal name
PROTHENA CORP PUBLIC LTD CO
Fiscal year ends
December 31, 2025
Latest annual report
10-K ยท Feb 27, 2026
Accession ยท CIK
0001559053-26-000008
0001559053

Revenue and margins

Prothena Corp Public Ltd Co had $9.7M of revenue in fiscal 2025, down 92.8% on the year before.

Revenue
Revenue
Margins, % of revenue
Gross Operating Net FCF
Margins, % of revenue
Gross Operating Net FCF

Net income and earnings per share

Loss periods are shown in red.

Net income
Net income
Diluted EPS
Diluted EPS

Returns on capital

After-tax operating income as a share of the money invested in the business: debt plus equity, minus cash.

Return on capital, equity and assets (annual)
Return on capital Return on equity Return on assets

Cash flow

Free cash flow was โ€” in fiscal 2025, โ€” of revenue. Cash from operations minus capital spending.

Free cash flow
Cash from operations vs capital spending
Cash from operations Capital spending
Cash from operations vs capital spending
Cash from operations Capital spending

Dividends, buybacks and share count

Prothena Corp Public Ltd Co returned โ€” to shareholders in fiscal 2025. The diluted share count rose 0.1%.

Dividends and buybacks
Dividends Buybacks
Diluted shares outstanding (annual)

Balance sheet

Cash, debt and the ratios that show how comfortably Prothena Corp Public Ltd Co can carry it.

Cash vs debt (incl. leases)
Cash Debt
Fiscal year endFY21FY22FY23FY24FY25
Cash and short-term investments $579M$710M$619M$471M$308M
Current ratio 17.5x14.3x11.2x10.0x7.7x
Quick ratio 17.5x14.3x11.2x10.0x7.7x
Total assets $609M$758M$696M$547M$327M
Total liabilities $143M$136M$135M$60.2M$46.3M
Shareholders' equity $466M$622M$561M$487M$280M
Net debt (โˆ’ = net cash) โ€”โ€”โ€”โ€”โ€”

Insider trades

Open-market purchases and sales by officers, directors and 10% owners, from Form 4 filings. โ€œPlanโ€ marks trades under a pre-arranged Rule 10b5-1 plan.

Bought, 12 months

$0.0M

0 insiders

Sold, 12 months

$0.0M

0 insiders

Of sales under plans

โ€”

$0.0M

No open-market insider trades in the last 12 months.

Piotroski F-score

Nine pass/fail tests of profitability, funding and efficiency. 8โ€“9 is strong, 0โ€“2 weak.

TestFY16FY17FY18FY19FY20FY21FY22FY23FY24FY25
Net income is positive โœ• โœ• โœ• โœ• โœ• โœ“ โœ• โœ• โœ• โœ•
Cash from operations is positive โœ• โœ• โœ• โœ• โœ• โœ“ โœ• โœ• โœ• โœ•
Return on assets rose โ€” โœ“ โœ• โœ“ โœ• โœ“ โœ• โœ• โœ• โœ•
Cash from operations exceeds net income โœ“ โœ“ โœ“ โœ“ โœ“ โœ“ โœ“ โœ“ โœ• โœ“
Debt fell relative to assets โ€” โ€” โ€” โ€” โ€” โ€” โ€” โ€” โ€” โ€”
Current ratio rose โ€” โœ“ โœ“ โœ• โœ• โœ“ โœ• โœ• โœ• โœ•
Share count didn't rise โ€” โœ• โœ• โœ• โœ• โœ• โœ“ โœ• โœ• โœ•
Gross margin rose โ€” โ€” โ€” โ€” โ€” โ€” โ€” โ€” โ€” โ€”
Revenue rose relative to assets โ€” โœ“ โœ• โœ“ โœ“ โœ“ โœ• โœ“ โœ“ โœ•
F-score โ€” / 34 / 72 / 73 / 72 / 76 / 72 / 72 / 71 / 71 / 7
Accruals ratio โˆ’9.5%โˆ’4.6%โˆ’25.6%โˆ’5.4%โˆ’8.2%โˆ’5.4%โˆ’1.2%โˆ’1.8%4.5%โˆ’18.4%
Altman Z'' 4.674.931.361.00โˆ’3.266.315.843.425.27โˆ’5.98

10 years of figures

Amounts in USD. Hover a ratioโ€™s name for its definition.

Download CSV
Fiscal yearFY16FY17FY18FY19FY20FY21FY22FY23FY24FY25
Income statement
Revenue $1.1M $27.5M $1.0M $0.8M $0.9M $201M $53.9M $91.4M $135M $9.7M
Net interest income $0.6M โˆ’$0.1M $2.7M $8.2M $1.4M $0.0M $6.3M $31.0M $25.8M $14.1M
Research and development $120M $135M $101M $50.8M $74.9M $82.3M $136M $221M $223M $135M
Operating income โˆ’$160M โˆ’$155M โˆ’$159M โˆ’$85.7M โˆ’$113M $72.0M โˆ’$132M โˆ’$191M โˆ’$155M โˆ’$215M
Pretax income โˆ’$159M โˆ’$158M โˆ’$156M โˆ’$77.3M โˆ’$111M $71.9M โˆ’$126M โˆ’$160M โˆ’$129M โˆ’$201M
Income tax $1.1M โˆ’$4.4M โˆ’$0.5M $0.4M โˆ’$0.3M $4.9M โˆ’$8.7M โˆ’$13.5M โˆ’$6.6M $43.3M
Net income โˆ’$160M โˆ’$153M โˆ’$156M โˆ’$77.7M โˆ’$111M $67.0M โˆ’$117M โˆ’$147M โˆ’$122M โˆ’$244M
Diluted EPS โˆ’$4.66 โˆ’$4.07 โˆ’$3.93 โˆ’$1.95 โˆ’$2.78 $1.38 โˆ’$2.47 โˆ’$2.76 โˆ’$2.27 โˆ’$4.53
Diluted shares 0.03B 0.04B 0.04B 0.04B 0.04B 0.05B 0.05B 0.05B 0.05B 0.05B
Cash flow
Cash from operations โˆ’$116M โˆ’$131M โˆ’$28.3M โˆ’$53.0M โˆ’$80.4M $92.6M โˆ’$109M โˆ’$134M โˆ’$150M โˆ’$164M
Depreciation and amortization $2.4M $3.1M $3.2M $1.6M $1.5M $1.1M $0.7M $0.9M $0.9M $0.9M
Stock-based compensation $24.9M $26.8M $27.0M $23.6M $22.0M $24.7M $31.3M $40.9M $46.0M $37.6M
Balance sheet
Cash and short-term investments $387M $418M $428M $376M $295M $579M $710M $619M $471M $308M
Current assets $391M $426M $431M $378M $299M $585M $719M $639M $485M $315M
Current liabilities $41.1M $37.4M $14.9M $17.7M $25.8M $33.5M $50.1M $56.9M $48.5M $40.8M
Property and equipment, net $56.5M $55.0M $52.8M $3.9M $2.6M $2.0M $1.7M $3.8M $3.1M $2.1M
Total assets $460M $496M $499M $419M $333M $609M $758M $696M $547M $327M
Total liabilities $94.6M $89.1M $176M $146M $149M $143M $136M $135M $60.2M $46.3M
Shareholders' equity $365M $407M $323M $273M $184M $466M $622M $561M $487M $280M
Margins
Operating margin โˆ’15,121.8% โˆ’564.2% โˆ’16,634.0% โˆ’10,527.9% โˆ’13,216.2% 35.9% โˆ’244.1% โˆ’209.1% โˆ’114.4% โˆ’2,216.4%
EBITDA margin โˆ’14,891.8% โˆ’553.0% โˆ’16,297.3% โˆ’10,335.7% โˆ’13,038.7% 36.4% โˆ’242.7% โˆ’208.1% โˆ’113.7% โˆ’2,207.2%
Net margin โˆ’15,176.1% โˆ’556.8% โˆ’16,297.9% โˆ’9,542.6% โˆ’13,029.8% 33.4% โˆ’217.0% โˆ’160.9% โˆ’90.5% โˆ’2,520.6%
Net interest share of revenue 52.7% โˆ’0.5% 281.9% 1,007.7% 160.5% 0.0% 11.8% 33.9% 19.1% 146.0%
Returns
Return on capital employed โˆ’38.1% โˆ’33.8% โˆ’32.8% โˆ’21.3% โˆ’36.7% 12.5% โˆ’18.6% โˆ’29.9% โˆ’31.0% โˆ’75.1%
Return on equity โˆ’43.8% โˆ’39.7% โˆ’42.6% โˆ’26.1% โˆ’48.6% 20.6% โˆ’21.5% โˆ’24.8% โˆ’23.3% โˆ’63.6%
Return on assets โˆ’34.8% โˆ’32.0% โˆ’31.3% โˆ’16.9% โˆ’29.6% 14.2% โˆ’17.1% โˆ’20.2% โˆ’19.7% โˆ’55.9%
Return on tangible equity โˆ’43.8% โˆ’37.6% โˆ’48.2% โˆ’28.5% โˆ’60.4% 14.4% โˆ’18.8% โˆ’26.2% โˆ’25.1% โˆ’87.0%
Growth
Revenue growth โ€” 2,508.4% โˆ’96.5% โˆ’14.8% 4.8% 23,414.3% โˆ’73.1% 69.5% 47.9% โˆ’92.8%
Net income growth โ€” โ€” โ€” โ€” โ€” โ€” โˆ’274.6% โ€” โ€” โ€”
EPS growth โ€” โ€” โ€” โ€” โ€” โ€” โˆ’279.0% โ€” โ€” โ€”
Share count change โ€” 9.6% 5.1% 0.8% 0.1% 21.4% โˆ’2.3% 12.3% 1.0% 0.1%
Financial health
Current ratio 9.5x 11.4x 28.9x 21.4x 11.6x 17.5x 14.3x 11.2x 10.0x 7.7x
Quick ratio 9.5x 11.4x 28.9x 21.4x 11.6x 17.5x 14.3x 11.2x 10.0x 7.7x
Capital allocation
Stock comp / revenue 2,362.9% 97.3% 2,828.3% 2,897.4% 2,580.8% 12.3% 58.1% 44.8% 34.0% 388.7%
Quality scores
Piotroski F-score โ€” 4.0 2.0 3.0 2.0 6.0 2.0 2.0 1.0 1.0
Altman Z'' 4.7 4.9 1.4 1.0 โˆ’3.3 6.3 5.8 3.4 5.3 โˆ’6.0
Accruals ratio โˆ’9.5% โˆ’4.6% โˆ’25.6% โˆ’5.4% โˆ’8.2% โˆ’5.4% โˆ’1.2% โˆ’1.8% 4.5% โˆ’18.4%

Source: SEC EDGAR XBRL filings (CIK 0001559053). Data updated October 24, 2026. Quarterly fourth quarters are the full year minus the first nine months. For information only โ€” not investment advice. Check the original filings before relying on any figure.

โ†‘ โ†“ to move ยท โ†ต to open