SEC Form 4 · accession 0000905148-26-003413
PROTHENA CORP PUBLIC LTD CO · PRTA
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Tran Nguyen
Officer — Chief Strategy Officer and CFO
Period of report
Jul 28, 2026
Accepted (ET)
Jul 30, 2026 · 8:32 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001559053
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Ordinary Shares, par value $0.01 per shareF1 | Jul 28, 2026 | M | 57,000 | — | A | 97,205 | D | |
| Ordinary Shares, par value $0.01 per share | Jul 28, 2026 | D | 57,000 | $8.56 | D | 40,205 | D |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Restricted Stock UnitsF2,F1,F3 | — | Jul 28, 2026 | M | 57,000 | D | — | — | Ordinary Shares | 57,000 | 0 | D |
Explanation of responses
- F1Each restricted stock unit ("RSU") represents the contingent right to receive one share of the Issuer's Ordinary Shares upon vesting.
- F2These RSUs reported in Table II were granted to the Reporting Person on July 28, 2025 as part of an aggregate award of 95,000 RSUs and initially reported in Table I of the Form 4 filed on July 30, 2025, because they were solely settleable in shares at the time of grant. These RSUs are being moved to Table II as of this Form 4.
- F3These RSUs reported in Table II are fully vested as of July 28, 2026 (the one-year anniversary of the grant date). The remainder of the 95,000 RSUs reported in Table I (38,000 RSUs) are subject to vesting.