COLLIER RICHARD T 4

What Happened Richard T. Collier, a director of Prothena Corp. Public Ltd Co (PRTA), received a grant/award of a derivative interest covering 27,000 shares on 2026-05-15. The filing reports an acquisition price of $0.00 (derivative). According to the filing footnote, the shares subject to the option will vest and become exercisable 100% on the earlier of the first anniversary of the grant or the Issuer’s 2027 annual general meeting, subject to continued service.

Key Details

• Transaction date: 2026-05-15; filing date: 2026-05-15 (filed same day).
• Transaction type: Grant / award of a derivative (option) covering 27,000 shares; reported price $0.00.
• Vesting: 100% vest on earlier of one-year anniversary or 2027 AGM, contingent on continuous service (see footnote).
• Shares owned after transaction: Not specified in the provided filing summary.
• No indication this was a sale or exercise; this is a compensation award rather than an open-market purchase or sale.
• No 10b5-1 plan, tax-withholding, or late-filing flag disclosed in the provided data.

Context This is a typical director compensation award (a derivative/option grant) and not an open-market purchase or sale. Because the option vests in the future and is exercisable only after vesting, there was no immediate cash transaction or sale of shares reported. Such grants are common as part of director compensation and should be viewed as routine compensation disclosure rather than a direct buy or sell signal.