Ownership & Insider Lab
PROTHENA CORP PUBLIC LTD CO (PRTA)
Nasdaq · SEC CIK 0001559053
This is the supported SEC-traceable subset, not total insider ownership or personal wealth. Values reflect the current disclosed positions Grizzly Bulls can resolve and value. Latest source filing: Sep 3, 2026 · values through Sep 25, 2026.
Covered reporting owners
Filter the reporting-owner snapshot by holder, role, or security. Position values are shown only where the current reviewed data supports them.
| Holder | Role | Position | Current value | Latest filing |
|---|---|---|---|---|
| William P. Scully | 10% owner | 827,000 sharesOrdinary Shares, par value $0.01 per share | $6.86M | Sep 3, 2026 |
Recent supported insider transactions
These are supported direct, non-derivative historical transactions from companies where recent transaction history has passed separate review. Reported price is shown when present. The lab does not calculate gross proceeds and does not treat historical transactions as current wealth.
| Date | Holder | Action | Security | Units | Reported price | Filing |
|---|---|---|---|---|---|---|
| Sep 18, 2026 | William P. Scully | PurchaseSEC code P | Ordinary Shares, par value $0.01 per share | 100,000 shares | $8.4346 | 4 |
| Sep 2, 2026 | William P. Scully | PurchaseSEC code P | Ordinary Shares, par value $0.01 per share | 27,000 shares | $9.4718 | 4 |
| Aug 20, 2026 | William P. Scully | PurchaseSEC code P | Ordinary Shares, par value $0.01 per share | 50,000 shares | $8.7886 | 4 |
| Aug 18, 2026 | William P. Scully | DispositionSEC code G | Ordinary Shares, par value $0.01 per share | 627,553 shares | $0 | 4 |
| Aug 17, 2026 | William P. Scully | AcquisitionSEC code G | Ordinary Shares, par value $0.01 per share | 336,000 shares | $0 | 4 |
| Aug 10, 2026 | William P. Scully | AcquisitionSEC code G | Ordinary Shares, par value $0.01 per share | 251,553 shares | $0 | 4 |
| Aug 7, 2026 | William P. Scully | PurchaseSEC code P | Ordinary Shares, par value $0.01 per share | 34,000 shares | $8.6192 | 4 |
Published 7 of 7 source candidates under the current reviewed security-resolution rules.
Covered securities
| Security | Instrument family | Covered positions | Covered value |
|---|---|---|---|
| Ordinary Shares, par value $0.01 per share | ordinary-share | 1 | $6.86M |
Coverage and interpretation
Current holdings: direct positions that the reviewed ownership data can trace to an exact reporting owner, legal security, and current-basis quantity.
Current value: the existing published company-position valuation. This lab does not recalculate security values or infer missing positions.
Transactions: historical flow observations only. They are not used to reconstruct current ownership and are shown only for companies where recent transaction history is currently published.
Not included here: a claim of total insider ownership, total personal wealth, institutional 13F ownership, or an investment recommendation.