Prothena Corporation plc
PRTA Healthcare Biotechnology
Prothena Corporation plc’s revenue for fiscal 2025 (year ended December 2025) was $9.7 million, down 92.8% from fiscal 2024. In the quarter to June 2026, revenue fell 77.2%, EPS grew 84.6% and free cash flow grew 44.6%, each against the same quarter a year earlier. Insiders bought in the last twelve months.
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A Balance Sheet is a financial statement that provides a snapshot of a company's assets, liabilities, and shareholders' equity at a specific point in time. It follows the formula: Assets = Liabilities + Shareholders' Equity. Key components include current and non-current assets, current and long-term liabilities, and equity. The Balance Sheet helps businesses and investors evaluate financial stability, liquidity, and capital structure. It's essential for assessing the company's ability to meet its obligations and fund future operations.
| Dec '16 | Dec '17 | Dec '18 | Dec '19 | Dec '20 | Dec '21 | Dec '22 | Dec '23 | Dec '24 | Dec '25 | |
|---|---|---|---|---|---|---|---|---|---|---|
Cash and Short Term Investments |
386.92 | 417.62 | 427.66 | 375.72 | 296.73 | 579.09 | 710.41 | 620.18 | 471.39 | 307.53 |
Receivables |
0.18 | 0.24 | 0.00 | 0.07 | 0.02 | — | — | 5.16 | — | — |
Total current assets |
391.36 | 426.33 | 431.39 | 378.38 | 299.28 | 584.81 | 719.10 | 639.28 | 485.41 | 315.19 |
Property, Plant, Equpment (Net) |
56.45 | 54.99 | 52.84 | 3.87 | 2.55 | 2.01 | 1.73 | 3.84 | 3.08 | 2.14 |
Long Term Assets (Tax, Deferred) |
5.91 | 8.11 | 9.70 | 9.96 | 11.64 | 7.07 | 18.20 | 33.89 | 43.24 | — |
Long-term assets (Other) |
6.25 | 6.90 | 4.87 | 3.79 | 1.69 | 3.35 | 12.73 | 7.21 | 4.67 | 1.34 |
Total non-current assets |
68.61 | 70.00 | 67.41 | 40.89 | 33.69 | 24.56 | 38.94 | 57.10 | 61.70 | 11.61 |
Total Assets |
459.98 | 496.33 | 498.80 | 419.27 | 332.98 | 609.37 | 758.04 | 696.38 | 547.11 | 326.80 |
Accounts Payable |
13.07 | 13.63 | 1.47 | 1.24 | 4.12 | 3.69 | 9.27 | 25.39 | 7.77 | 5.88 |
Accrued Expenses |
19.07 | 13.51 | 5.37 | 5.83 | 9.04 | 6.35 | 10.79 | 14.72 | 13.43 | 4.33 |
Current Part of Taxes to Pay |
0.38 | 0.31 | 0.05 | 0.01 | 0.04 | — | — | — | — | — |
Current Revenue (Deferred) |
— | — | — | — | — | 7.66 | 11.44 | 0.00 | 8.85 | 2.66 |
Other current liabilities |
8.56 | 9.92 | 8.03 | 5.54 | 7.14 | 9.81 | 12.17 | 15.66 | 15.84 | 25.09 |
Total current liabilities |
41.08 | 37.37 | 14.93 | 17.71 | 25.85 | 33.45 | 50.15 | 56.89 | 48.50 | 40.84 |
Non-current Revenue (Deferred) |
2.08 | 0.25 | 110.24 | 110.24 | 110.24 | 102.93 | 85.29 | 67.41 | 3.45 | 0.00 |
Non-current Liabilities (Other) |
53.50 | 51.77 | 50.63 | 0.55 | 0.55 | 0.55 | 0.55 | — | — | — |
Total non-current liabilities |
53.50 | 51.77 | 160.87 | 128.63 | 123.12 | 109.87 | 85.85 | 78.13 | 11.68 | 5.49 |
Total liabilities |
94.57 | 89.14 | 175.80 | 146.35 | 148.97 | 143.32 | 135.99 | 135.02 | 60.18 | 46.33 |
Additional Paid In Capital |
654.27 | 849.15 | 920.59 | 944.41 | 966.64 | 1,181.63 | 1,454.52 | 1,540.86 | 1,588.73 | 1,626.37 |
Common Stock (Net) |
0.35 | 0.39 | 0.40 | 0.40 | 0.40 | 0.47 | 0.52 | 0.54 | 0.54 | 0.54 |
Retained Earnings |
(289.21) | (442.35) | (597.99) | (671.88) | (783.03) | (716.05) | (833.00) | (980.03) | (1,102.34) | (1,346.43) |
Common Equity (Total) |
365.40 | 407.19 | 323.00 | 272.92 | 184.01 | 466.04 | 622.04 | 561.37 | 486.93 | 280.47 |
Shareholders Equity (Total) |
365.40 | 407.19 | 323.00 | 272.92 | 184.01 | 466.04 | 622.04 | 561.37 | 486.93 | 280.47 |
Shareholders Equity and Liabilities (Total) |
459.98 | 496.33 | 498.80 | 419.27 | 332.98 | 609.37 | 758.04 | 696.38 | 547.11 | 326.80 |
Shares (Common) |
34.75 | 38.48 | 39.86 | 39.90 | 39.92 | 46.66 | 52.10 | 53.68 | 53.83 | 53.83 |
Shareholders Equity (Tangible) |
365.40 | 407.19 | 323.00 | 272.92 | 184.01 | 466.04 | 622.04 | 561.37 | 486.93 | 280.47 |
Net Debt |
(386.92) | (417.62) | (427.66) | (375.72) | (296.73) | (579.09) | (710.41) | (620.18) | (471.39) | (307.53) |
Total Debt |
— | — | — | 22.94 | 17.84 | 12.33 | 6.47 | — | — | — |