PRTA — PROTHENA CORP PUBLIC LTD CO
—
Nasdaq ·
Health Care ·
Pharmaceuticals ·
CIK 1559053 ·
Last close
$8.61
Market Cap
$442.01M
52W High
$11.80
52W Low
$7.73
ADV30
484,873
Next earnings
2026-11-05
Quarterly Fundamentals
Revenues vs Net Income (last 4 Q)
Assets vs Liabilities (last 4 Q)
| Period | Revenues | Gross profit | Op income | Net income | Assets | Cash | Liabilities |
|---|---|---|---|---|---|---|---|
| Jun 2026 | 1,010,000 | — | -18,687,000 | -18,583,000 | 302,579,000 | 288,193,000 | 15,688,000 |
| Mar 2026 | 51,084,000 | — | 25,791,000 | 32,721,000 | 349,894,000 | 329,462,000 | 37,278,000 |
| Dec 2025 | 21,000 | — | -27,211,000 | -21,589,000 | 326,804,000 | 307,531,000 | 46,330,000 |
| Sep 2025 | 2,415,000 | — | -39,761,000 | -36,541,000 | 352,628,000 | 330,843,000 | 57,639,000 |
Cashflow TTM (yfinance, fills SEC gap)
Operating CF
$-60,049,000
Investing CF
$-662,000
Financing CF
$-22,531,000
CapEx
$-181,000
Dividends Paid
—
Buybacks
$-22,531,000
EPS Diluted TTM
$-0.84
As of
2026-08-09
Balance + Analyst (yfinance extras)
Retained Earnings
$-1,332,295,000
Inventory
—
Receivables
$0
ST Investments
—
EBIT TTM
$-59,868,000
Pretax Income TTM
$-44,350,000
Interest Exp TTM
—
Analysts
5
Yahoo Snapshot (yfinance, live)
Total Revenue
$54,530,000
EBITDA
$-59,040,000
Free Cash Flow
$-54,222,500
Enterprise Value
$177,237,184
Total Cash
$288,192,992
Total Debt
$6,991,000
Shares Out
51,336,974
Trailing EPS
$-0.82
Book Value
$5.54
ROE
-14.4%
ROA
-10.7%
Div Yield
—
Annual Trend (SEC EDGAR, last 4y)
Revenues vs Net Income (last 4y)
| FY end | Revenues | Op income | Net income | Assets | Liabilities | Equity | Op cash flow |
|---|---|---|---|---|---|---|---|
| Dec 2025 | 9,684,000 | -184,560,000 | -244,092,000 | 326,804,000 | 46,330,000 | 280,474,000 | -163,580,000 |
| Dec 2024 | 135,157,000 | -154,561,000 | -122,310,000 | 547,108,000 | 60,182,000 | 486,926,000 | -150,050,000 |
| Dec 2023 | 91,370,000 | -191,036,000 | -147,028,000 | 696,382,000 | 135,017,000 | 561,365,000 | -133,906,000 |
| Dec 2022 | 53,905,000 | -131,557,000 | -116,949,000 | 758,035,000 | 135,993,000 | 622,042,000 | -108,821,000 |
TTM Snapshot
Revenues TTM
$57,940,000
NetIncome TTM
$-151,176,000
OpCashFlow TTM
—
Assets (Latest)
$349,894,000
Forward EPS
$-1.52
Max Pain — expiry 2026-12-18
max pain strike: $9.00 · spot: $8.80 · call oi: 2,456 · put oi: 2,455
Expected Move to 2026-12-18:
±$1.55
(17.61%) —
implied range
$7.25 –
$10.35
· ATM straddle on $9.00 strike
Peers — same industry
| Ticker | Name | Market Cap | Last | Daily % |
|---|---|---|---|---|
| IBO | IMPACT BIOMEDICAL INC. | $443.15M | $4.11 | — |
| KMDA | KAMADA LTD | $448.70M | $7.78 | — |
| RZLT | Rezolute, Inc. | $448.79M | $4.64 | — |
| CTNM | Contineum Therapeutics, Inc. | $434.39M | $13.18 | — |
| DMAC | DiaMedica Therapeutics Inc. | $431.94M | $8.01 | — |
News headlines (Yahoo Finance, 1h cache)
CRMD vs. PRTA: Which Stock Should Value Investors Buy Now?
2026-10-08 14:40 · Yahoo
Prothena to Participate in the H.C. Wainwright 28th Annual Global Investment Conference
2026-09-09 20:05 · Yahoo
Prothena (PRTA) Reports Q2 Loss, Misses Revenue Estimates
2026-08-06 23:10 · Yahoo
Prothena to Report Second Quarter 2026 Financial Results on August 6
2026-07-30 20:05 · Yahoo
Earnings Beat: Prothena Corporation plc Just Beat Analyst Forecasts, And Analysts Have Been Updating Their Models
2026-05-11 13:17 · Yahoo
KMDA or PRTA: Which Is the Better Value Stock Right Now?
2026-08-14 15:40 · Yahoo
PRTA's Q2 Loss Narrower Than Expected, Pipeline Progress in Focus
2026-08-07 17:41 · Yahoo
4 Alzheimer's Drug Stocks to Watch on World Alzheimer's Day
2026-09-21 16:40 · Yahoo
Real Parkinson’s Disease Hope from Jupiter Neurosciences
2026-08-19 16:32 · Yahoo
Prothena Reports Second Quarter 2026 Financial Results and Business Highlights
2026-08-06 20:05 · Yahoo
Recent Insider Activity
| Filed | Trade | Insider | Title | Type | Price | Qty | Value |
|---|---|---|---|---|---|---|---|
| 2026-10-06 13:53:53 | 2026-10-02 | Scully William P | 10% | P - Purchase | 8.57 | 100000 | 857240 |
| 2026-09-30 17:10:27 | 2026-09-29 | Scully William P | 10% | P - Purchase | 8.68 | 162000 | 1405674 |