PRTA · XBRL financial data
Prothena Corporation Public Limited Company financial statements, every quarter
The same tables from 12 filings, lined up. Matched by XBRL tag: renamed lines keep their history.
How these numbers work
- Every number comes from the company's XBRL financial data filed with the SEC, and each one links to its filing.
- Lines are matched by XBRL tag, so a line renamed between filings keeps its history.
- * marks a quarter worked out from the filing totals: the 10-K year minus the first three quarters, or a year-to-date total minus the earlier one. Fourth-quarter earnings per share is fourth-quarter net income over the fourth-quarter weighted shares.
- 0 means a filing states zero; a dash (—) means no filing states that number.
- “year only” means the 10-K gives the full year but not the quarters needed to work out the fourth. A worked-out quarter of revenue, cost of revenue or operating cash flow more than twice the company's largest quarter of the two years before is shown this way too.
- Gross profit is shown as the company reports it; a worked-out quarter must equal revenue less cost of revenue for that quarter, or it is a dash.
- Operating income can be above gross profit when the company books other operating income between the two, shown on its own line.
- Shares outstanding come from each filing's cover page, as of the date printed there.
- Quarters are fiscal: Q2 FY27 is the second quarter of the company's fiscal 2027.
Income statement
CSVFiscal quarters (PRTA's year ends in late December)
| In millions of dollars | Sep 30, 2023 | Dec 31, 2023 | Mar 31, 2024 | Jun 30, 2024 | Sep 30, 2024 | Dec 31, 2024 | Mar 31, 2025 | Jun 30, 2025 | Sep 30, 2025 | Dec 31, 2025 | Mar 31, 2026 | Jun 30, 2026 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Revenue from contracts with customers | 85 | 0* | 0 | 132 | 1 | 2* | 3 | 4 | 2 | 0* | 51 | 1 |
| Research and development | 58 | 62* | 64 | 58 | 51 | 50* | 51 | 41 | 29 | 15* | 13 | 9 |
| General and administrative | 17 | 17* | 17 | 16 | 17 | 17* | 18 | 16 | 13 | 13* | 13 | 11 |
| Total operating expenses | 75 | 79* | 82 | 74 | 67 | 67* | 68 | 89 | 43 | 24* | 21 | 22 |
| Operating income (loss) | 10 | (79)* | (82) | 58 | (67) | (65)* | (66) | (85) | (40) | (24)* | 30 | (21) |
| Other income (expense) | (0) | (0)* | (0) | (0) | (0) | 0* | (0) | (0) | (0) | (0)* | 0 | (0) |
| Income tax expense (benefit) | (3) | (3)* | (2) | (2) | (1) | (2)* | (1) | 45 | (0) | 0* | 0 | 0 |
| Net income (loss) | 22 | (67)* | (72) | 67 | (59) | (58)* | (60) | (126) | (37) | (22)* | 33 | (19) |
| Earnings per share, basic USD per share | 0.41 | (1.26)* | (1.34) | 1.24 | (1.10) | (1.08)* | (1.12) | (2.34) | (0.68) | (0.40)* | 0.61 | (0.36) |
| Earnings per share, diluted USD per share | 0.38 | — | (1.34) | 1.22 | (1.10) | (1.10)* | (1.12) | (2.34) | (0.68) | (0.40)* | 0.60 | (0.36) |
| Weighted average shares, basic millions of shares | 54 | 54* | 54 | 54 | 54 | 54* | 54 | 54 | 54 | 54* | 54 | 52 |
| Weighted average shares, diluted millions of shares | 58 | 49* | 54 | 55 | 54 | 53* | 54 | 54 | 54 | 54* | 54 | 52 |
Balance sheet
CSVFiscal quarters (PRTA's year ends in late December)
| In millions of dollars | Sep 30, 2023 | Dec 31, 2023 | Mar 31, 2024 | Jun 30, 2024 | Sep 30, 2024 | Dec 31, 2024 | Mar 31, 2025 | Jun 30, 2025 | Sep 30, 2025 | Dec 31, 2025 | Mar 31, 2026 | Jun 30, 2026 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cash and cash equivalents | 671 | 619 | 547 | 564 | 519 | 471 | 418 | 371 | 331 | 308 | 329 | 288 |
| Accounts receivable | 5 | 5 | 0 | 0 | 0 | 0 | — | — | — | — | — | — |
| Prepaid and other current assets | 13 | 14 | 18 | 22 | 16 | 14 | 18 | 14 | 9 | 8 | 10 | 4 |
| Total current assets | 691 | 639 | 566 | 586 | 535 | 485 | 436 | 385 | 340 | 315 | 339 | 292 |
| Property and equipment, net | 2 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 |
| Right-of-use asset | 13 | 12 | 13 | 12 | 11 | 11 | 10 | 10 | 9 | 8 | 7 | 7 |
| Total assets | 747 | 696 | 623 | 646 | 595 | 547 | 495 | 399 | 353 | 327 | 350 | 303 |
| Accounts payable | 19 | 25 | 14 | 9 | 10 | 8 | 16 | 12 | 11 | 6 | 4 | 2 |
| Total current liabilities | 53 | 57 | 43 | 47 | 46 | 49 | 48 | 68 | 51 | 41 | 33 | 12 |
| Lease liability, non-current | 9 | 11 | 10 | 10 | 9 | 8 | 8 | 7 | 6 | 5 | 5 | 4 |
| Total liabilities | 130 | 135 | 121 | 64 | 61 | 60 | 58 | 75 | 58 | 46 | 37 | 16 |
| Accumulated deficit | (913) | (980) | (1,052) | (985) | (1,044) | (1,102) | (1,163) | (1,288) | (1,325) | (1,346) | (1,314) | (1,332) |
| Total stockholders' equity | 617 | 561 | 502 | 582 | 534 | 487 | 438 | 324 | 295 | 280 | 313 | 287 |
| Total liabilities and equity | 747 | 696 | 623 | 646 | 595 | 547 | 495 | 399 | 353 | 327 | 350 | 303 |
| Common shares outstanding (cover page) millions of shares | 54 | 54 | 54 | 54 | 54 | 54 | 54 | 54 | 54 | 54 | 52 | 51 |
Cash flows
CSVFiscal quarters (PRTA's year ends in late December)
| In millions of dollars | Sep 30, 2023 | Dec 31, 2023 | Mar 31, 2024 | Jun 30, 2024 | Sep 30, 2024 | Dec 31, 2024 | Mar 31, 2025 | Jun 30, 2025 | Sep 30, 2025 | Dec 31, 2025 | Mar 31, 2026 | Jun 30, 2026 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Net income (loss) | 22 | (67)* | (72) | 67 | (59) | (58)* | (60) | (126) | (37) | (22)* | 33 | (19) |
| Stock-based compensation | 11 | 11* | 12 | 12 | 11 | 11* | 11 | 12 | 7 | 7* | 7 | 8 |
| Depreciation and amortization | 0* | 0* | 0 | 0* | 0* | 0* | 0 | 0* | 0* | 0* | 0 | 0* |
| Net cash from operating activities | 10* | (51)* | (73) | 16* | (45)* | (48)* | (53) | (46)* | (41)* | (23)* | 29 | (25)* |
| Net cash from investing activities | (0)* | (2)* | (0) | (0)* | (0)* | (0)* | (0) | (0)* | (0)* | 0* | 0 | (1)* |
| Net cash from financing activities | 3* | 0* | 1 | 0* | 0* | (0)* | (0) | (0)* | (0)* | 0* | (7) | (16)* |
Compare with peers
SIC 2834 and related industry codes, similar size. Each row is the latest quarter reported.
How peers are chosen
- SIC 2834 and related industry codes with public float (or, where float is missing, quarterly revenue) between 0.2x and 5x the company's.
- Each row is the latest quarter the company has reported, named in the Quarter column; when that filing is a 10-K, it is the fourth quarter, never the full year.
- Runway shows only for companies burning cash with under $10B of public float.
- * marks a quarter worked out from the filing totals: for a 10-Q, the year-to-date total less the earlier one.
- A cell reading “not reported” means the filings give no figure for that quarter alone.
| Company | Cash ($M) | Revenue, quarter ($M) | Operating cash flow, quarter ($M) | Shares outstanding | Runway | Quarter |
|---|---|---|---|---|---|---|
| Prothena Corp Public | 288 | 1 | (25)* | 51.3M | 11.5 quarters | 10-QJun 30, 2026 |
| Altimmune | 63 | not reported | (24)* | 194.5M | 13.5 quarters | 10-QJun 30, 2026 |
| Usana Health Sciences | 169 | 223 | 23* | 18.5M | — | 10-QJul 4, 2026 |
| Rigel Pharmaceuticals | 61 | 79 | 31* | 18.7M | — | 10-QJun 30, 2026 |
| Aura Biosciences | 68 | not reported | (33)* | 103.7M | 2.1 quarters | 10-QJun 30, 2026 |
| Amarin | 157 | 40 | 9.2* | not reported | — | 10-QSep 30, 2026 |
| Nektar Therapeutics | 39 | 10 | (76)* | 34.1M | 9.0 quarters | 10-QJun 30, 2026 |
| Northwest Biotherapeutics | 0.6 | 0.8 | (7.2)* | 1.7B | 0.1 quarters | 10-QJun 30, 2026 |
| Emergent BioSolutions | 176 | 110 | 100* | 51.4M | — | 10-QSep 30, 2026 |
Not investment advice. Not affiliated with the U.S. SEC.