Event-Driven Stocks

PROTHENA CORP PUBLIC LTD CO

PRTANasdaq

Healthcare · Pharmaceutical Preparations · L2 · SEC filings ↗ · Compare ⊕

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Signs● 2 good● 4 warning● 1 severedetails ↓

Financials

SEC XBRL · annual
 FY25FY24FY23FY22FY21FY20
Revenue$9.7M$135.2M$91.4M$53.9M$200.6M$853,000
Operating income−$214.6M−$154.6M−$191.0M−$131.6M$72.0M−$112.7M
Net income−$244.1M−$122.3M−$147.0M−$116.9M$67.0M−$111.1M
Total assets$326.8M$547.1M$696.4M$758.0M$609.4M$333.0M
Total liabilities$46.3M$60.2M$135.0M$136.0M$143.3M$149.0M
Equity$280.5M$486.9M$561.4M$622.0M$466.0M$184.0M
EPS (diluted)$-4.53$-2.27$-2.76$-2.47$1.38$-2.78
Shares out.53.8M53.7M52.6M46.7M40.0M39.9M

Reported figures from the company's SEC filings (XBRL). Blank where a line item isn't cleanly tagged — never estimated.

Key ratios

from filings · FY2025
Operating margin
−2216.4%
Net margin
−2520.6%
Return on equity
−87.0%
Return on assets
−74.7%
Return on capital (ROCE)
−75.1%
Liabilities / assets
14.2%
Debt / equity
0.17×
Book value / share
$5.21
Revenue growth (YoY)
−92.8%
Net income growth (YoY)
—

Computed from the company's own SEC figures — no market price, so these are facts, not a valuation. Book value per share is reported equity ÷ shares; it is not the stock price.

Financial health

forensic scores · FY2025
Altman Z″ (distress)
-5.98distress
Accruals / assets
−24.6%clean
Piotroski F-Score
1/9weak

Altman Z″is a textbook bankruptcy-distress score from book values only (>2.6 safe · 1.1–2.6 grey · <1.1 distress). Accruals = (net income − operating cash flow) ÷ assets; persistently high accruals are an earnings-quality red flag. Beneish M-Scoreis an eight-ratio screen comparing this year with last (M > −1.78 = elevated manipulation-risk screen, not proof). Piotroski F-Scorecounts how many of nine fundamental-health checks pass (shown as passed / applicable; we use operating margin and total liabilities as documented proxies where the exact input isn't XBRL-tagged). Computed from SEC filings — descriptive factors, not advice or a forecast.

Quality score

EDS Score
42
/ 100
Profitability 0Growth 0Catalyst 67Earnings quality 67Financial strength 75

Our own multi-factor score from free SEC data — profitability, growth, financial strength, earnings quality, and event/ownership catalysts. No market price and no licensed model: each axis is the share of source-backed checks it passes. Descriptive factors, not advice or a forecast.

Signs

● 1 severe● 4 warning● 2 good
  • Altman Z″ in the distress zone
  • Operating losses (negative operating margin)
  • Reported a net loss
  • Revenue declined year-over-year
  • Negative operating cash flow
  • Conservative leverage (liabilities < 50% of assets)
  • Clean earnings (low accruals)

Derived from the company's own SEC figures (fundamentals, forensic scores, filing discipline) — descriptive factors, not advice or a forecast.

5%+ owners

SEC Schedule 13D / 13G · last 3 yrs

Holders who disclosed a 5%+ stake. 13D signals intent to influence or control; 13G is a passive holding. Latest filing per holder — open it for the exact stake.

Short interest

FINRA · bi-monthly
SettlementShares shortDays to coverΔ vs prior
May 15, 20267.1M13.0+3.3%
Apr 30, 20266.9M18.3-2.9%
Apr 15, 20267.1M15.3+0.9%
Mar 31, 20267.0M12.3-0.4%
Mar 13, 20267.0M11.2+2.8%

Shares sold short as reported to FINRA. Days-to-cover = short shares ÷ average daily volume — higher means more potential squeeze pressure.

Material events

SEC Form 8-K · most recent

Events the company reported on Form 8-K, labelled by the SEC item code it filed under — its own classification, not our interpretation.

Recent SEC filings

All filings ↗

Event-driven situations (2)