PRTA
Prothena Corporation plcNASDAQ
Healthcare • Biotechnology
Updated 1 day ago
Coverage limited
Factor tilt: Anti-Growth Small Cap
$8.36-0.83%
Close Oct 13, 2026
- Market cap
- $437.67M
- 1 month
- -5.6%
- 3 months
- -0.8%
- 1 year
- -16.8%
- 52-week range
- $7.91$11.51
- Dividend
- No dividends on record
- Short interest
- 22.9% of float8M shares · settled Sep 30, 2026 · -6.2% since Sep 15, 2026 · FINRA
Fundamentals · trailing 12 months to Jun 30, 2026
- Revenue
- $54.53M
- Net income
- -$43.99M
- Free cash flow
- -$60.71M
- Book value
- $286.89M
- Total debt
- $6.99M
- P/E
- —
- Price / sales
- 8×
- Price / book
- 1.5×
- FCF yield
- -13.9%
- Net margin
- -80.7%
EODHD (TTM) · as of Oct 13, 2026
End-of-day close from stored market data, not a live quote.
Portfolio context
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Loading market dates
No upcoming ex-dividend date announced
No 8-K filings in the last 30 days.
Smart money context
Holder IQ: MEDIUM
26 top institutions tracked
as of 2026-Q2 (filed 2026-09-23)
Last 13F trend: unchanged (light)
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Sentiment: bullish
Last trade: buy 5 days ago
Red flags: 0
Largest 13-F holders · Q2 2026
188 filers reported a long position in PRTA for Q2 2026. 13-F holdings are filed up to 45 days after the quarter ends.
| Holder | Value | Shares | Shares vs Q1 2026 |
|---|---|---|---|
| FMR LLC | $70.5M | 7.2M | -4.7% |
| Rubric Capital Management LP | $49M | 5M | Unchanged |
| BlackRock, Inc. | $47.7M | 4.9M | +4.8% |
| STATE STREET CORP | $23.4M | 2.4M | +23.5% |
| ACADIAN ASSET MANAGEMENT LLC | $19.7M | 2M | +29.9% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $16.2M | 1.7M | +14.2% |
| D. E. Shaw & Co., Inc. | $15.8M | 1.6M | -8.6% |
| ADAR1 Capital Management, LLC | $15.2M | 1.6M | -1.7% |
| TWO SIGMA INVESTMENTS, LP | $12.4M | 1.3M | +4.9% |
| Palo Alto Investors LP | $11.2M | 1.1M | -5.4% |
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