Follow-The-Filings

Security · featured owners

PRTA Prothena Corp. PLC

Health Care SHS Equity as of 2026 Q2 among managers we track

  • 1 Owner
  • Max 1.6%
  • $11M
  • 1 reduce

Who owns this now

Largest portfolio weights among featured holders · max 1.6% (Palo Alto Investors) · not free-float ownership

  1. Palo Alto Investors reduce 1.6%

holders

sorted by value · long equity only · current book 2026 Q2 · open a manager for their book

history
Palo Alto Investors 2026 Q2 1.6% Reduce −5.4% 1,143,155 $11M history

1 current · options excluded

SEC filings

Recent issuer filings from EDGAR · 7 shown · open Filing / Doc on SEC.gov

Filed Form Detail Links
8-K 2.02,9.01 Filing Doc
10-Q Filing Doc
8-K 5.07 Filing Doc
8-K 2.02,9.01 Filing Doc
10-Q Filing Doc
DEFA14A Filing Doc
8-K 7.01,8.01,9.01 Filing Doc

Insider forms

Form 3 / 4 / 5 from EDGAR · 13 rows shown

Filed Form Detail Links
4 Period Sep 2, 2026 Filing Doc
4 Period Aug 20, 2026 Filing Doc
4 Period Aug 18, 2026 Filing Doc
4 Period Aug 10, 2026 Filing Doc
4 Period Aug 7, 2026 Filing Doc
4 Period Jul 28, 2026 · 8 forms Filing Doc
4 Period Jun 16, 2026 Filing Doc
4 Period Jun 15, 2026 Filing Doc
4 Period Jun 11, 2026 Filing Doc
4 Period Jun 4, 2026 Filing Doc
4 Period Jun 2, 2026 Filing Doc
4 Period May 22, 2026 Filing Doc
4 Period May 15, 2026 · 6 forms Filing Doc

Updated about 20 hours ago Source: SEC EDGAR submissions All on EDGAR

financials

US-GAAP annual · as tagged in Form 10-K · fiscal years · values link to the SEC filing

Income statement

Metric FY2023 FY2024 FY2025
Revenue $91.37M $135.16M $9.68M
Net income -$147.03M -$122.31M -$244.09M
Net margin * -160.9% -90.5% -2520.6%

Balance sheet

Metric FY2023 FY2024 FY2025
Total current assets $639.28M $485.41M $315.19M
Total non-current assets $57.1M $61.7M $11.61M
Total assets $696.38M $547.11M $326.8M
Total current liabilities $56.89M $48.5M $40.84M
Total non-current liabilities $78.13M $11.68M $5.49M
Total equity $561.36M $486.93M $280.47M

Cash flow

Metric FY2023 FY2024 FY2025
Cash from operations -$133.91M -$150.05M -$163.58M
Cash from investing -$2.77M -$0.298M -$0.138M
Cash from financing $45.1M $1.55M -$0.139M
Net change in cash * -$91.58M -$148.79M -$163.86M

Source: SEC companyfacts (US-GAAP 10-K) · * = computed (not a single XBRL tag) · fiscal year as labeled by the issuer · not adjusted or audited by Follow-The-Filings

ownership over time

filing count by report period · click a bar for that quarter’s holders