Prothena Corp Public Ltd Co
PRTA- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001559053
In the last 90 days, Prothena Corp Public Ltd Co insiders filed 6 open-market purchases and 2 sales; 187 institutions reported holding it in 13F filings for Q2 2026, worth $462.7M in total; no superinvestor holds it.
Q3 2025 vs. Q2 2025
How the institutions holding Prothena Corp Public Ltd Co changed between Q2 2025 and Q3 2025.
All holders in Q3 2025All holders in Q2 2025
| Measure | Q2 2025 | Of which not filed for Q3 2025 | Q3 2025 | Change |
|---|---|---|---|---|
| Holders | 189 | 1 | 187 | −1 |
| Shares | 41.8M | 57.5K | 42.6M | +896.5K (+2.1%) |
| Value | $253.6M | $348.7K | $415.8M | +$162.6M (+64.2%) |
1 institution that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so the changes leave them out.
New holders (31)
Institutions that held Prothena Corp Public Ltd Co at the end of Q3 2025 but not at the end of Q2 2025.
Sold out (32)
Institutions that held Prothena Corp Public Ltd Co at the end of Q2 2025 and filed for Q3 2025 without it.
Not filed for Q3 2025 yet (1)
Institutions that held Prothena Corp Public Ltd Co at the end of Q2 2025 and haven't filed a 13F for Q3 2025. Not filing isn't selling, so they aren't counted as sold out.
| Institution | Shares, Q2 2025 | Value, Q2 2025 |
|---|---|---|
| Norges Bank | 57,454 | $348.7K |