Dunn William H. Jr. 4

What Happened

• William H. Dunn Jr., a director of Prothena Corp. Public Ltd Co (PRTA), received a grant classified as an award/acquisition (code A) of 27,000 derivative shares on 2026-05-15. The reported acquisition price is $0.00, indicating an equity award (derivative) rather than a cash purchase. No immediate cash changed hands.

Key Details

• Transaction date: 2026-05-15; transaction type: Grant/Award (derivative), 27,000 shares at $0.00.
• Filing date / period of report: 2026-05-15 (filed timely; no late filing indicated).
• Shares owned after transaction: not reported in the provided filing excerpt.
• Footnote: The award vests 100% on the earlier of (a) the first anniversary of the grant date or (b) the issuer’s 2027 annual general meeting, provided Mr. Dunn remains a director through the vesting date.
• No indication of tax withholding, 10b5-1 plan, or immediate exercise/sale in the filing.

Context

• This is a typical director compensation equity grant (a derivative award) — it does not create immediately transferable shares until vesting/exercise conditions are met. Such grants are routine for board compensation and are not direct market purchases or sales.