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PROTHENA CORP PUBLIC LTD CO (PRTA) Annual Reports

PROTHENA CORP PUBLIC LTD CO is listed on Nasdaq, classified by the SEC under Pharmaceutical Preparations (SIC 2834). This page indexes 3 annual reports, each linking to the full text on the SEC's EDGAR system.

Company profile

  • Exchange: Nasdaq
  • Fiscal year end: 12/31
  • SEC CIK: 1559053 →

Website:Official site ↗

Financial Highlights

FY2026 Q2 (quarterly, ended 2026-06-30)
CurrentPrior yearYoY
Revenue $1.0M $4.4M -77.1%
Operating income $-21.1M $-84.6M +75.1%
Net income $-18.6M $-125.8M +85.2%
EPS (diluted) $-0.36 $-2.34 +84.6%

Source: SEC EDGAR (XBRL company facts)

Financial history

Revenue & profit
Quarterly · In mn (USD)
Revenue 1.01 mn Net income -18.6 mn
2011Q4 2012Q1 2012Q2 2012Q3 2012Q4 2013Q1 2013Q2 2013Q3 2013Q4 2014Q1 2014Q2 2014Q3 2014Q4 2015Q1 2015Q2 2015Q3 2015Q4 2016Q1 2016Q2 2016Q3 2016Q4 2017Q1 2017Q2 2017Q3 2017Q4 2018Q1 2018Q2 2018Q3 2018Q4 2019Q1 2019Q2 2019Q3 2019Q4 2020Q1 2020Q2 2020Q3 2020Q4 2021Q1 2021Q2 2021Q3 2021Q4 2022Q1 2022Q2 2022Q3 2022Q4 2023Q1 2023Q2 2023Q3 2023Q4 2024Q1 2024Q2 2024Q3 2024Q4 2025Q1 2025Q2 2025Q3 2025Q4 2026Q1 2026Q2
Show table:Income statement
Item2011Q42012Q12012Q22012Q32012Q42013Q12013Q22013Q32013Q42014Q12014Q22014Q32014Q42015Q12015Q22015Q32015Q42016Q12016Q22016Q32016Q42017Q12017Q22017Q32017Q42018Q12018Q22018Q32018Q42019Q12019Q22019Q32019Q42020Q12020Q22020Q32020Q42021Q12021Q22021Q32021Q42022Q12022Q22022Q32022Q42023Q12023Q22023Q32023Q42024Q12024Q22024Q32024Q42025Q12025Q22025Q32025Q42026Q12026Q2
Revenue2.66 0.17 0.17 0.17 0.17 32.2 15.1 1.49 2.01 0.59 0.28 0.43 0.31 0.27 0.33 0.29 0.17 0.26 26.8 0.22 0.23 0.23 0.28 0.26 0.19 0.19 0.17 0.21 0.26 0.14 0.2 0.16 0.36 0.16 60.1 139 1.17 1.15 1.31 1.52 49.9 2.17 4.02 84.9 0.32 0.05 132 0.97 2.12 2.83 4.42 2.42 0.02 51.1 1.01
Operating income-29.2 -10.8 -9.71 -8.67 -12.2 -8.97 -11.2 -9.57 -10.7 18.0 1.57 -13.1 -13.1 -15.0 -18.0 -22.7 -24.2 -27.4 -40.2 -42.7 -49.3 -36.3 -18.1 -53.5 -47.3 -48.7 -63.1 -24.3 -22.8 -22.9 -18.5 -21.0 -23.3 -24.9 -26.7 -30.9 -30.3 -32.1 27.9 109 -33.1 -37.9 -43.2 -50.3 -0.07 -56.3 -66.5 10.3 -78.5 -81.5 58.4 -66.5 -64.9 -65.6 -84.6 -40.2 -24.2 30.0 -21.1
Net income-29.7 -10.8 -9.71 -8.67 -12.2 -8.95 -11.3 -9.69 -11.1 17.9 1.29 -13.2 -13.1 -15.2 -18.3 -23.0 -24.2 -27.5 -40.4 -43.2 -48.9 -35.4 -17.7 -52.4 -47.8 -48.7 -59.9 -24.6 -22.5 -20.9 -15.8 -19.4 -21.6 -23.6 -26.3 -30.6 -30.7 -36.7 27.6 109 -33.2 -36.3 -41.2 -45.8 6.35 -46.9 -54.6 21.9 -67.5 -72.2 66.9 -59.0 -58.0 -60.2 -126 -36.5 -21.6 32.7 -18.6
Balance sheet
Quarterly · In mn (USD)
Total assets 303 mn Total liabilities 15.7 mn
2011Q4 2012Q1 2012Q2 2012Q3 2012Q4 2013Q1 2013Q2 2013Q3 2013Q4 2014Q1 2014Q2 2014Q3 2014Q4 2015Q1 2015Q2 2015Q3 2015Q4 2016Q1 2016Q2 2016Q3 2016Q4 2017Q1 2017Q2 2017Q3 2017Q4 2018Q1 2018Q2 2018Q3 2018Q4 2019Q1 2019Q2 2019Q3 2019Q4 2020Q1 2020Q2 2020Q3 2020Q4 2021Q1 2021Q2 2021Q3 2021Q4 2022Q1 2022Q2 2022Q3 2022Q4 2023Q1 2023Q2 2023Q3 2023Q4 2024Q1 2024Q2 2024Q3 2024Q4 2025Q1 2025Q2 2025Q3 2025Q4 2026Q1 2026Q2

Equity = assets − liabilities. Balance-sheet figures are period-end balances, not cumulative.

Show table:Balance sheet
Item2011Q42012Q12012Q22012Q32012Q42013Q12013Q22013Q32013Q42014Q12014Q22014Q32014Q42015Q12015Q22015Q32015Q42016Q12016Q22016Q32016Q42017Q12017Q22017Q32017Q42018Q12018Q22018Q32018Q42019Q12019Q22019Q32019Q42020Q12020Q22020Q32020Q42021Q12021Q22021Q32021Q42022Q12022Q22022Q32022Q42023Q12023Q22023Q32023Q42024Q12024Q22024Q32024Q42025Q12025Q22025Q32025Q42026Q12026Q2
Current assets126 121 114 103 178 200 307 309 299 284 406 394 377 482 451 416 391 514 512 469 426 537 494 457 431 415 419 409 378 360 341 320 299 352 409 608 585 556 521 525 719 700 677 691 639 566 586 535 485 436 385 340 315 339 292
Total assets129 124 118 108 182 204 312 314 304 290 411 399 385 491 503 480 460 582 579 538 496 607 563 525 499 460 462 451 419 399 379 356 333 380 436 633 609 581 550 554 758 742 721 747 696 623 646 595 547 495 399 353 327 350 303
Current liabilities1.74 5.09 9.08 7.72 7.41 8.96 11.3 9.97 12.0 9.54 13.5 18.6 22.2 23.2 33.5 36.9 41.1 33.7 39.6 39.3 37.4 35.6 46.1 23.6 14.9 14.9 28.0 31.8 17.7 17.1 18.5 21.7 25.9 23.5 52.9 29.2 33.5 36.5 40.1 50.6 50.1 48.9 71.6 53.4 56.9 43.3 46.7 46.4 48.5 48.5 67.8 51.4 40.8 32.5 11.7
Total liabilities2.80 6.48 10.7 9.15 9.14 10.8 13.3 12.0 14.2 12.2 15.9 21.0 24.6 25.5 71.7 78.5 94.6 85.7 92.0 91.4 89.1 197 207 185 176 147 159 162 146 144 144 146 149 145 148 142 143 143 142 150 136 134 139 130 135 121 63.6 60.9 60.2 57.7 74.7 57.6 46.3 37.3 15.7
Equity-6.44 126 118 107 98.8 173 193 298 302 290 277 395 378 361 466 431 401 365 496 487 446 407 410 356 340 323 312 303 289 273 255 234 210 184 235 288 490 466 439 407 405 622 607 582 617 561 502 582 534 487 438 324 295 280 313 287
Cash flow
Quarterly · In mn (USD)
Operating -25.1 mn Investing -0.65 mn Financing -15.6 mn
2011Q4 2012Q1 2012Q2 2012Q3 2012Q4 2013Q1 2013Q2 2013Q3 2013Q4 2014Q1 2014Q2 2014Q3 2014Q4 2015Q1 2015Q2 2015Q3 2015Q4 2016Q1 2016Q2 2016Q3 2016Q4 2017Q1 2017Q2 2017Q3 2017Q4 2018Q1 2018Q2 2018Q3 2018Q4 2019Q1 2019Q2 2019Q3 2019Q4 2020Q1 2020Q2 2020Q3 2020Q4 2021Q1 2021Q2 2021Q3 2021Q4 2022Q1 2022Q2 2022Q3 2022Q4 2023Q1 2023Q2 2023Q3 2023Q4 2024Q1 2024Q2 2024Q3 2024Q4 2025Q1 2025Q2 2025Q3 2025Q4 2026Q1 2026Q2

Positive = cash in, negative = cash out.

Show table:Cash flow statement
Item2011Q42012Q12012Q22012Q32012Q42013Q12013Q22013Q32013Q42014Q12014Q22014Q32014Q42015Q12015Q22015Q32015Q42016Q12016Q22016Q32016Q42017Q12017Q22017Q32017Q42018Q12018Q22018Q32018Q42019Q12019Q22019Q32019Q42020Q12020Q22020Q32020Q42021Q12021Q22021Q32021Q42022Q12022Q22022Q32022Q42023Q12023Q22023Q32023Q42024Q12024Q22024Q32024Q42025Q12025Q22025Q32025Q42026Q12026Q2
Operating-19.7 -8.62 -10.4 -7.45 -15.6 -5.10 -6.85 -10.3 -9.84 17.9 6.21 -12.3 -12.5 -14.7 -11.1 -16.9 -19.7 -25.1 -27.5 -30.6 -34.0 -37.8 -36.1 -17.7 -39.5 -31.6 58.1 -33.6 -21.3 -17.4 -12.1 -8.94 -14.5 -23.2 -18.7 -19.4 -19.1 -33.7 36.6 112 -22.5 -37.4 -35.3 -31.2 -4.98 -47.5 -44.9 9.52 -51.0 -73.0 16.0 -45.2 -47.8 -53.4 -46.3 -40.6 -23.3 28.9 -25.1
Investing-0.59 -0.14 -0.03 -0.1 -1.03 -0.11 -0.2 -0.23 0 -0.03 -0.33 -0.11 -0.04 -0.03 -0.04 -0.33 -0.98 -0.24 -4.76 -8.55 -3.09 -2.40 -0.21 -0.54 -0.38 -0.18 -0.1 -0.15 -1.30 -0.12 -0.07 -0.25 -0.11 -0.02 -0.05 -0.08 -0.05 -0.05 0 -0.21 -0.32 -0.02 -0.16 -0.13 -0.15 -0.05 -0.77 -0.44 -1.51 -0.1 -0.14 -0.01 -0.04 -0.04 -0.09 -0.01 0 0 -0.65
Financing20.3 8.76 10.4 7.55 142 -0.08 0 -0.12 84.7 0.51 103 14.7 -0.01 1.03 134 2.66 3.45 129 0.99 4.77 19.5 160 1.47 2.61 1.46 43.2 -0.86 -0.97 -1.30 0.01 0.21 0 0.01 0.15 0 0.06 0 81.3 20.2 87.0 1.77 1.34 1.23 18.1 221 23.3 18.6 2.71 0.48 0.84 0.44 0.33 -0.06 -0.05 -0.07 -0.02 0 -6.95 -15.6
Cash at period end0 0 125 120 113 102 177 195 304 306 294 280 402 388 371 474 443 409 387 507 472 456 418 429 486 452 428 410 398 390 376 353 334 315 295 343 400 600 579 543 509 496 710 686 659 671 619 547 564 519 471 418 371 331 308 329 288
Profitability
Quarterly · %
Operating margin -2089.2% Net margin -1839.9%
2011Q4 2012Q1 2012Q2 2012Q3 2012Q4 2013Q1 2013Q2 2013Q3 2013Q4 2014Q1 2014Q2 2014Q3 2014Q4 2015Q1 2015Q2 2015Q3 2015Q4 2016Q1 2016Q2 2016Q3 2016Q4 2017Q1 2017Q2 2017Q3 2017Q4 2018Q1 2018Q2 2018Q3 2018Q4 2019Q1 2019Q2 2019Q3 2019Q4 2020Q1 2020Q2 2020Q3 2020Q4 2021Q1 2021Q2 2021Q3 2021Q4 2022Q1 2022Q2 2022Q3 2022Q4 2023Q1 2023Q2 2023Q3 2023Q4 2024Q1 2024Q2 2024Q3 2024Q4 2025Q1 2025Q2 2025Q3 2025Q4 2026Q1 2026Q2

Gross, operating and net margin = the respective profit ÷ revenue.

Show table:Profitability
Item2011Q42012Q12012Q22012Q32012Q42013Q12013Q22013Q32013Q42014Q12014Q22014Q32014Q42015Q12015Q22015Q32015Q42016Q12016Q22016Q32016Q42017Q12017Q22017Q32017Q42018Q12018Q22018Q32018Q42019Q12019Q22019Q32019Q42020Q12020Q22020Q32020Q42021Q12021Q22021Q32021Q42022Q12022Q22022Q32022Q42023Q12023Q22023Q32023Q42024Q12024Q22024Q32024Q42025Q12025Q22025Q32025Q42026Q12026Q2
Operating margin-459.7%-5243.9%-6701.8%-5594.1%-6408.4%55.9%10.4%-883.7%-651.0%-2534.4%-6487.4%-5282.3%-7886.6%-10343.4%-12060.1%-14925.9%-28817.0%-14004.3%-67.6%-24444.8%-20662.5%-21457.3%-22605.4%-9538.4%-11729.4%-12340.9%-11076.0%-10230.2%-9091.4%-17622.7%-13708.7%-19647.1%-8418.9%-20068.1%46.5%78.5%-2823.6%-3290.9%-3293.4%-3317.9%-0.1%-2596.8%-1654.7%12.2%-24846.5%-163056.0%44.2%-6857.0%-3056.8%-2319.0%-1914.4%-1666.3%-115252.4%58.8%-2089.2%
Net margin-459.8%-5234.5%-6767.7%-5666.1%-6619.2%55.4%8.5%-887.1%-651.3%-2563.6%-6574.5%-5355.7%-7868.7%-10385.3%-12145.6%-15118.5%-28598.3%-13661.8%-66.0%-23924.2%-20855.0%-21472.7%-21463.1%-9631.0%-11577.8%-11217.7%-9467.1%-9486.8%-8419.5%-16715.6%-13478.0%-19475.8%-8532.2%-22959.4%46.0%78.5%-2831.0%-3147.4%-3143.6%-3016.7%12.7%-2160.6%-1358.4%25.8%-21353.2%-144478.0%50.7%-6082.6%-2729.9%-2128.5%-2845.4%-1513.1%-102804.8%64.0%-1839.9%
Returns & leverage
Quarterly · %
ROE -14.4% ROA -12.5% Debt ratio 5.2%
2011Q4 2012Q1 2012Q2 2012Q3 2012Q4 2013Q1 2013Q2 2013Q3 2013Q4 2014Q1 2014Q2 2014Q3 2014Q4 2015Q1 2015Q2 2015Q3 2015Q4 2016Q1 2016Q2 2016Q3 2016Q4 2017Q1 2017Q2 2017Q3 2017Q4 2018Q1 2018Q2 2018Q3 2018Q4 2019Q1 2019Q2 2019Q3 2019Q4 2020Q1 2020Q2 2020Q3 2020Q4 2021Q1 2021Q2 2021Q3 2021Q4 2022Q1 2022Q2 2022Q3 2022Q4 2023Q1 2023Q2 2023Q3 2023Q4 2024Q1 2024Q2 2024Q3 2024Q4 2025Q1 2025Q2 2025Q3 2025Q4 2026Q1 2026Q2

ROE / ROA = trailing four-quarter net income ÷ average equity / total assets (annual mode: the year’s net income ÷ average of opening and closing). Not computed when the denominator is zero or negative.

Show table:Returns & leverage
Item2011Q42012Q12012Q22012Q32012Q42013Q12013Q22013Q32013Q42014Q12014Q22014Q32014Q42015Q12015Q22015Q32015Q42016Q12016Q22016Q32016Q42017Q12017Q22017Q32017Q42018Q12018Q22018Q32018Q42019Q12019Q22019Q32019Q42020Q12020Q22020Q32020Q42021Q12021Q22021Q32021Q42022Q12022Q22022Q32022Q42023Q12023Q22023Q32023Q42024Q12024Q22024Q32024Q42025Q12025Q22025Q32025Q42026Q12026Q2
ROE-69.0%-33.6%-38.4%-42.7%-27.4%-9.1%-0.8%-2.5%-3.1%-17.1%-17.2%-20.5%-24.8%-25.0%-27.9%-34.8%-44.1%-34.9%-31.6%-36.4%-39.7%-36.8%-49.5%-46.0%-42.6%-35.4%-25.4%-25.0%-26.1%-28.3%-33.8%-40.9%-48.6%-50.8%-26.9%19.8%20.6%20.0%-0.4%-35.0%-21.5%-24.4%-28.5%-14.3%-24.9%-31.1%-8.8%-22.9%-23.3%-23.5%-66.8%-67.6%-63.6%-40.3%-14.4%
ROA-32.0%-31.8%-34.9%-39.1%-26.3%-8.7%-0.8%-2.4%-2.9%-16.3%-16.5%-19.5%-23.4%-23.8%-25.2%-30.8%-37.9%-31.3%-26.9%-30.4%-32.0%-28.0%-36.5%-34.1%-31.3%-24.0%-16.3%-16.1%-16.9%-18.7%-21.6%-25.3%-29.6%-31.9%-17.3%14.1%14.2%14.0%-0.3%-26.4%-17.1%-19.3%-22.2%-11.3%-20.2%-25.3%-7.5%-19.6%-19.7%-19.7%-58.0%-59.2%-55.9%-35.8%-12.5%
Debt ratio2.2%5.2%9.1%8.5%5.0%5.3%4.3%3.8%4.7%4.2%3.9%5.3%6.4%5.2%14.3%16.4%20.6%14.7%15.9%17.0%18.0%32.5%36.8%35.3%35.2%32.1%34.5%35.9%34.9%36.1%38.1%41.1%44.7%38.2%34.0%22.5%23.5%24.5%25.9%27.0%17.9%18.1%19.3%17.4%19.4%19.4%9.9%10.2%11.0%11.6%18.7%16.4%14.2%10.7%5.2%
EPS
Quarterly · US$
EPS US$-0.36
2011Q4 2012Q1 2012Q2 2012Q3 2012Q4 2013Q1 2013Q2 2013Q3 2013Q4 2014Q1 2014Q2 2014Q3 2014Q4 2015Q1 2015Q2 2015Q3 2015Q4 2016Q1 2016Q2 2016Q3 2016Q4 2017Q1 2017Q2 2017Q3 2017Q4 2018Q1 2018Q2 2018Q3 2018Q4 2019Q1 2019Q2 2019Q3 2019Q4 2020Q1 2020Q2 2020Q3 2020Q4 2021Q1 2021Q2 2021Q3 2021Q4 2022Q1 2022Q2 2022Q3 2022Q4 2023Q1 2023Q2 2023Q3 2023Q4 2024Q1 2024Q2 2024Q3 2024Q4 2025Q1 2025Q2 2025Q3 2025Q4 2026Q1 2026Q2
Show table:EPS
Item2011Q42012Q12012Q22012Q32012Q42013Q12013Q22013Q32013Q42014Q12014Q22014Q32014Q42015Q12015Q22015Q32015Q42016Q12016Q22016Q32016Q42017Q12017Q22017Q32017Q42018Q12018Q22018Q32018Q42019Q12019Q22019Q32019Q42020Q12020Q22020Q32020Q42021Q12021Q22021Q32021Q42022Q12022Q22022Q32022Q42023Q12023Q22023Q32023Q42024Q12024Q22024Q32024Q42025Q12025Q22025Q32025Q42026Q12026Q2
EPS(US$)-0.51-0.64-0.550.780.06-0.48-0.48-0.55-0.59-0.73-0.76-0.81-1.18-1.26-1.41-0.99-0.46-1.37-1.24-1.26-1.50-0.62-0.56-0.52-0.40-0.49-0.54-0.59-0.66-0.77-0.77-0.910.582.13-0.74-0.78-0.88-0.970.16-0.89-1.030.38-1.26-1.341.22-1.10-1.07-1.12-2.34-0.68-0.400.60-0.36

Source: SEC EDGAR (XBRL company facts)

Annual reports by year

10-K: annual report of a US domestic issuer. Filings are the original documents hosted on SEC EDGAR — this site neither mirrors nor edits them.

FAQ

Where can I read PROTHENA CORP PUBLIC LTD CO (PRTA) annual reports?

Every year in the table above links straight to the full text on SEC EDGAR. US annual reports are web pages (HTML) rather than PDFs, so you can read and search them in the browser without downloading anything. 3 filings are currently indexed.

What is the difference between a 10-K and a 20-F?

A 10-K is the annual report of a US domestic issuer, with sections fixed by law: Item 1 Business, Item 1A Risk Factors, Item 7 Management's Discussion and Analysis. A 20-F is filed by foreign private issuers — Taiwanese companies with US ADRs, such as TSMC, file 20-F rather than 10-K. A 40-F applies to Canadian issuers under the MJDS.

Are earnings call materials available here?

No. Earnings calls are not SEC filings, so US pages on this site cover annual reports only. Taiwan has a mandatory investor-conference disclosure regime, and those materials are indexed under Annual Reports.

Source: US Securities and Exchange Commission (SEC) EDGAR. This site indexes public filings and links to them; it hosts no copies, offers no investment advice, and makes no warranty as to timeliness or completeness.
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