6 institutions reported holding $1.5M of PROTHENA CORP PLC (PRTA) in SEC 13F filings for 2026-06-30. Largest institutional holders: Hennion & Walsh Asset Management, Inc. ($888,883), Assenagon Asset Management S.A. ($614,665), GAMMA Investing LLC ($25,337), Versant Capital Management, Inc ($20,011), HARBOR INVESTMENT ADVISORY, LLC ($979). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Hennion & Walsh Asset Management, Inc. | $888,883 | 90,795 | Added |
| 2 | Assenagon Asset Management S.A. | $614,665 | 62,785 | Trimmed |
| 3 | GAMMA Investing LLC | $25,337 | 2,588 | Added |
| 4 | Versant Capital Management, Inc | $20,011 | 2,044 | Trimmed |
| 5 | HARBOR INVESTMENT ADVISORY, LLC | $979 | 100 | Hold |
| 6 | CoreCap Advisors, LLC | $108 | 11 | Trimmed |
Source: SEC Form 13F filings · as of 2026-06-30