Monitor for a subsequent pricing or prospectus supplement filing that would disclose offering size, price, and timing. The effectiveness creates potential for near-term share issuance, which could lead to dilution if equity is sold.
Price Chart
Executive Summary
Analysis based on filing metadata only — document content was unavailable. This is an EFFECT filing, indicating that a previously filed registration statement (likely a shelf registration) has become effective, allowing Prothena to issue securities immediately. No financial details or offering terms are available in the provided documents.
Key Facts
- EFFECT filing indicates a registration statement has become effective as of March 2, 2026
- SEC File Number: 333-277290, suggesting this relates to a prior Form S-3 or F-3 registration
- Company is based in Dublin, Ireland and operates in the life sciences sector
- No offering size, pricing, or use of proceeds disclosed in available documents
- Filing does not indicate whether this is an IPO, follow-on, or shelf takedown
Financial Impact
Not specified
Risk Factors
- Potential for unexpected equity issuance under the shelf registration, leading to dilution
- Lack of transparency on offering terms increases uncertainty for shareholders
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 3 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| EFFECT Filing (Primary) | 9999999995-26-000697 |
| Document: 9999999995-26-000697-index.html | 9999999995-26-000697 |
| Document: 9999999995-26-000697.txt | 9999999995-26-000697 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 3, 2026 28d ago | Insider Buy | $9.82 $8.86 | ▼ −9.78% | ▼ −8.57% | $8.44 (−14.05%) |
Aug 21, 2026 6w ago | Insider Buy | $9.45 $9.33 | ▼ −1.27% | ▼ −1.74% | $8.44 (−10.69%) |
Aug 10, 2026 7w ago | Insider Buy | $9.12 $8.88 | ▼ −2.63% | ▼ −2.58% | $8.44 (−7.46%) |
Jul 31, 2026 9w ago | Insider Cluster | $8.12 $8.76 | ▲ +7.88% | ▲ +4.37% | $8.44 (+3.94%) |
Jun 18, 2026 15w ago | Insider Buy | $8.93 $9.27 | ▲ +3.81% | ▲ +5.47% | $8.44 (−5.49%) |
Jun 12, 2026 15w ago | Insider Buy | $8.15 $9.15 | ▲ +12.27% | ▲ +13.65% | $8.44 (+3.56%) |
May 14, 2026 20w ago | 3 | $9.76 $9.83 | ▲ +0.72% | ▼ −0.25% | $8.44 (−13.52%) |
May 7, 2026 21w ago | 8-K | $10.73 $9.86 | ▼ −8.11% | ▼ −9.57% | $8.44 (−21.34%) |
Mar 27, 2026 26w ago | DEFA14A | $9.25 $10.36 | ▲ +12.00% | ▲ +7.70% | $8.44 (−8.76%) |
Mar 3, 2026 30w ago | EFFECT | $9.36 $9.77 | ▲ +4.38% | ▲ +4.86% | $8.44 (−9.83%) |
US Market Status
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