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Buy Day today: Poor (52) Mixed market breadth · today: Core PCE (August) ≈
PRTA

Prothena Corporation plc

Healthcare · Biotechnology

8.30$ -4.1% vs. previous close Closing price · As of: Sep 24, 2026

Statements

Balance Sheet

Prothena Corporation plc (PRTA) by the numbers: income statement, balance sheet and cash flow, by year or by quarter. In the most recent period (Q2 26), "Total Assets" came in at 303 million USD. Tick rows to compare them in a chart.

Income Statement Balance Sheet Cash Flow Ratios
Annual Quarterly
Amounts Change % Common size %
Last 12 Full history
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All figures in millions of USD.

Tick rows to compare them in a chart (up to 4)

Balance Sheet PRTA
Line item Q3 16 Q4 16 Q1 17 Q2 17 Q3 17 Q4 17 Q1 18 Q2 18 Q3 18 Q4 18 Q1 19 Q2 19 Q3 19 Q4 19 Q1 20 Q2 20 Q3 20 Q4 20 Q1 21 Q2 21 Q3 21 Q4 21 Q1 22 Q2 22 Q3 22 Q4 22 Q1 23 Q2 23 Q3 23 Q4 23 Q1 24 Q2 24 Q3 24 Q4 24 Q1 25 Q2 25 Q3 25 Q4 25 Q1 26 Q2 26
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
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
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
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
0.4 0.2 0.3 30 0.2 0.2 100 0.0 – 0.0 0.0 – 0.0 0.1 0.2 0.1 0.0 0.0 0.0 0.0 0.1 0.0 – – 3.3 0.1 – 0.6 5.2 5.2 0.0 0.0 0.0 0.0 – – – – – –
0.0 -0.2 0.0 -30 0.0 -0.2 0.0 0.0 0.0 0.0 0.0 – 0.0 -0.1 0.0 0.0 1.4 1.4 1.4 1.4 – 0.0 – – – -0.1 – 11 11 -5.2 – – – – – – – – – –
52 56 56 56 55 55 54 53 53 53 4.6 4.3 4.2 3.9 3.5 3.2 2.9 2.6 2.3 17 1.9 2.0 1.9 1.9 2.0 8.0 1.9 2.2 15 – – – – – – – – – – –
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
78 95 86 92 91 89 197 207 185 176 147 159 162 146 144 144 146 149 145 148 142 143 143 142 150 136 134 139 130 135 121 64 61 60 58 75 58 46 37 16
37 41 34 40 39 37 36 46 24 15 15 28 32 18 17 19 22 26 23 53 29 33 36 40 51 50 49 72 53 57 43 47 46 49 48 68 51 41 33 12
39 51 52 52 0.4 0.7 1.1 1.5 1.6 1.6 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 6.1 6.3 6.4 6.5 4.9 3.4 1.8 1.1 2.4 2.6 2.6 2.6 2.6 2.9 2.9 2.9 2.9 3.0
11 13 6.3 13 11 14 12 10 4.5 1.5 2.1 1.5 2.4 1.2 3.3 2.1 2.8 4.1 4.2 5.9 3.5 3.7 9.3 7.6 9.8 9.3 13 14 19 25 14 9.3 10 7.8 16 12 11 5.9 4.3 1.9
39 39 38 38 37 36 35 34 32 – 22 – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
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
-240 -289 -324 -342 -395 -442 -491 -551 -576 -598 -615 -631 -650 -672 -695 -722 -752 -783 -820 -792 -683 -716 -752 -794 -839 -833 -880 -934 -913 -980 -1,052 -985 -1,044 -1,102 -1,163 -1,288 -1,325 -1,346 -1,314 -1,332
34 35 36 38 38 38 39 40 40 40 40 40 40 40 40 40 40 40 40 47 51 47 47 47 47 54 53 53 58 54 54 55 54 54 54 54 54 54 54 52

Showing the most recent 40 periods — older statements are on file for this stock.

Data as of: September 24, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)

Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.

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