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.
Q4 2021 vs. Q3 2021
How the institutions holding Prothena Corp Public Ltd Co changed between Q3 2021 and Q4 2021.
All holders in Q4 2021All holders in Q3 2021
| Measure | Q3 2021 | Of which not filed for Q4 2021 | Q4 2021 | Change |
|---|---|---|---|---|
| Holders | 192 | 1 | 196 | +5 |
| Shares | 40.9M | 34.8K | 42.8M | +1.95M (+4.8%) |
| Value | $2.92B | $2.47M | $2.12B | −$796.5M (−27.3%) |
1 institution that held it in Q3 2021 haven't filed for Q4 2021 yet. Not filing isn't selling, so the changes leave them out.
New holders (41)
Institutions that held Prothena Corp Public Ltd Co at the end of Q4 2021 but not at the end of Q3 2021.
Sold out (36)
Institutions that held Prothena Corp Public Ltd Co at the end of Q3 2021 and filed for Q4 2021 without it.
Not filed for Q4 2021 yet (1)
Institutions that held Prothena Corp Public Ltd Co at the end of Q3 2021 and haven't filed a 13F for Q4 2021. Not filing isn't selling, so they aren't counted as sold out.
| Institution | Shares, Q3 2021 | Value, Q3 2021 |
|---|---|---|
| Marshall Wace North America L.P. | 34,755 | $2.47M |