EEDGAR/calls
The BriefMarketsAll StocksNewsScreenerCommunity

Get the Brief in your inbox

A daily, SEC-grounded read on the market — movers, earnings, and our boldest calls. Free.

EEDGAR/calls

SEC-grounded equity research — opinionated calls reasoned over real filings.

Research

  • The Brief
  • Markets
  • All Stocks
  • Screener
  • Discover
  • Research
  • The Flip Side
  • Track record

Tools

  • Compare
  • Congress trades
  • Events
  • Filing search
  • Groups
  • Trending
  • News

More

  • Pricing
  • Community
  • Newsletter
  • Developers / API
  • Account
DisclosuresTermsPrivacy

Research & education only — not financial advice. EDGAR is not a registered investment adviser; calls are impersonal, generated from SEC filings and a delayed/third-party price feed, and may be wrong or out of date. The operator and an affiliated trading operation may hold or trade the securities EDGAR rates — see Disclosures. Do your own research.

EDGAR® is a registered trademark of the U.S. Securities and Exchange Commission. EDGAR/calls is not affiliated with, endorsed by, or approved by the U.S. Securities and Exchange Commission.

EEDGAR/calls
The BriefMarketsAll StocksNewsScreenerCommunity

Pulling SEC filings + quote and writing the call…

EEDGAR/calls
The BriefMarketsAll StocksNewsScreenerCommunity
← New search
Home›Stocks›PRTA

PRTA

PROTHENA CORP PUBLIC LTD CO

Next earnings Aug 3, 2026 · consensus $-0.14 EPS, $44.0M rev

Last earnings -5.9% on 2026-05-07

Avoid
$10.02
▲ +8.09%
$10.02▲ +65.35%
over 1Y
L $5.99EODHDH $11.51
Earnings Dividend Split Congress buy Congress sellGrouped by date · hover a pin to expand
Today+8.1%
1W+9.5%
1M-0.1%
3M+8.2%
YTD+8.9%
1Y+65.3%
OverviewFinancialsValuationQualityTimelineFilings
Rating
Avoid
Quality
F
Valuation
Fair value
Filings
Watch
Avoid
Conviction
Horizon
Medium (3–12mo)
Street · 12 analysts
Buy

Conservative balance sheet (liabilities/equity 0.17x); but revenue fell -92.8% YoY.

Revenue (FY2025) $9.68M · FY2025

PROTHENA CORP PUBLIC LTD CO shows $9.68M in FY2025 revenue (-92.8% YoY), a -2520.6% net margin, and -87.0% ROE.

Financials · annual, by fiscal year

Line itemFY21FY22FY23FY24FY25
Revenue$201M$53.9M$91.4M$135M$9.68M
Gross profit—————
Operating income$72.0M-$132M-$191M-$155M-$215M
Net income$67.0M-$117M-$147M-$122M-$244M
Diluted EPS$1.38-$2.47-$2.76-$2.27-$4.53
Net margin33.4%-217.0%-160.9%-90.5%-2520.6%

Annual figures from SEC 10-K XBRL filings. Open the filing links below for full statement detail.

Key statistics

Valuation

Enterprise value$232M
EV / EBITDA—
EV / Sales23.9
EV / FCF—
P / FCF—
PEG (trailing)—
Earnings yield-45.3%
FCF yield—

Quality & risk

ROIC (est.)-60.5%
Free cash flow—
Total debt—
Net cash$308M
Altman Z-Score0.09 distress
Piotroski F-Score1/7

Capital returns

Buyback yield—
Dividend yield (est.)—
Shareholder yield—
Shares Δ YoY+0.0%

Computed from SEC XBRL annual figures + the current quote. EV and ROIC use long-term + current debt where filed; estimates, not investment advice.

Disclosure timeline

SEC · 8-Ks + reports
Some governance/structural items recently, but no outright red flags.
  1. 8-K Shareholder vote2026-05-15
  2. 8-K Earnings results2026-05-07
  3. 10-Q Quarterly report2026-05-07
  4. DEF 14A Proxy statement2026-03-27
  5. 8-K Reg FD disclosure2026-02-27
  6. 10-K Annual report2026-02-27
  7. 8-K Earnings results2026-02-19
  8. 8-K Officer / director change2025-12-12
  9. 8-K Shareholder vote2025-11-19

Recent filings

all on EDGAR ↗
4Period ending 2026-06-162026-06-18open ↗4Period ending 2026-06-152026-06-16open ↗4Period ending 2026-06-112026-06-12open ↗3Period ending 2026-06-082026-06-12open ↗144Filing2026-06-09open ↗4Period ending 2026-06-042026-06-05open ↗4Period ending 2026-06-022026-06-03open ↗4Period ending 2026-05-222026-05-26open ↗4Period ending 2026-05-152026-05-15open ↗4Period ending 2026-05-152026-05-15open ↗4Period ending 2026-05-152026-05-15open ↗4Period ending 2026-05-152026-05-15open ↗

Quality score

F
ValueGrowthProfitHealthMom.
ValueF
GrowthF
ProfitabilityF
Financial healthB-
Momentum—
  • ✗Revenue growing year-over-year
  • ✗Profitable (positive net income)
  • ✗Net margin above 10%
  • ✗Return on equity above 15%
  • ✓Liabilities below 2× equity
Revenue
$9.68M
-92.8% YoY
Net margin
-2520.6%
ROE
-87.0%
P/E
—

SEC fundamentals · FY 2025

'21'22'23'24'25

■ revenue · ■ net income, by fiscal year

Revenue$9.68M-92.8%
Net income-$244M-99.6%
Operating income-$215M-38.9%
Diluted EPS-$4.53-99.6%
Cash & equivalents$308M-34.8%
Total assets$327M-40.3%
Total liabilities$46.3M-23.0%
Stockholders' equity$280M-42.4%
Op.: -2216.4%L/E: 0.17x

Frequently asked

Is PROTHENA CORP PUBLIC LTD CO (PRTA) a buy?
PRTA currently carries a Avoid rating with 4/5 conviction, derived from its latest SEC filings. Conservative balance sheet (liabilities/equity 0.17x); but revenue fell -92.8% YoY.
What is PROTHENA CORP PUBLIC LTD CO's quality score?
PRTA scores 31/100 (grade F) on a SEC-grounded quality model spanning value, growth, profitability, financial health and momentum.

Sources: SEC EDGAR (CIK 0001559053, latest 10-Q filed 2026-05-07) · EODHD · as of 6/26/2026, 6:18:46 PM.

Research and education only — not financial advice. EDGAR is not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities EDGAR rates; see Disclosures. Past performance does not guarantee future results. Do your own research.

Insider activity

Form 4 · SEC

Last 90 days: 5 open-market buys · 0 sales

2026-06-16
SCULLY WILLIAM P
10% owner
Buy20.0K @ $7.90$158K
2026-06-15
SCULLY WILLIAM P
10% owner
Gift325K
2026-06-11
SCULLY WILLIAM P
10% owner
Buy125K @ $8.17$1.02M
2026-06-04
SCULLY WILLIAM P
10% owner
Buy50.0K @ $9.31$465K
2026-06-02
SCULLY WILLIAM P
10% owner
Buy50.0K @ $9.43$471K
2026-05-22
SCULLY WILLIAM P
10% owner
Buy100K @ $9.81$981K

Earnings history

beat/miss · move
2026-05-07Beat +271.7% est▼ -5.90%8-K ↗
2026-02-19Beat +29.8% est▼ -0.66%8-K ↗
2025-11-06Beat +3.0% est▼ -1.85%8-K ↗
2025-08-04Miss -28.9% est▲ +1.91%8-K ↗
2025-05-08—▼ -2.61%8-K ↗
2025-02-20—▲ +1.80%8-K ↗

Dates from 8-K (Item 2.02); beat/miss = reported EPS vs consensus (Finnhub, recent quarters); move = prior close → close on/after.

Recent news

market news →
Adaptive Biotechnologies (ADPT) Moves 9.7% Higher: Will This Strength Last?Bullish
finance.yahoo.com· 2026-06-12
High Insider Ownership Growth Stocks To Watch In May 2026Bullish
finance.yahoo.com· 2026-05-28
Prothena Posts Q1 Earnings as Revenues Surge on Milestone PaymentBullish
finance.yahoo.com· 2026-05-08
Prothena Reports First Quarter 2026 Financial Results and Business HighlightsBullish
finance.yahoo.com· 2026-05-07
Stock Market Today, April 29: KalVista Pharmaceuticals Surges on Chiesi Group Acquisition AnnouncementBullish
finance.yahoo.com· 2026-04-29
3 Growth Companies Insiders Are Eager To HoldBullish
finance.yahoo.com· 2026-04-29

Vs tracked universe

compare →

1044 tracked peers · median

EDGAR Score31 vs 67
Revenue growth-92.8% vs 7.1%
Net margin-2520.6% vs 10.5%
Return on equity-87.0% vs 12.3%
P/E— vs 25.5

News sentiment

EODHD · 5d
Bullish
+0.15
vs typical · 6 articles
↑ improving

Recent news tone vs the market's typical (which skews positive). A soft signal, not a recommendation.