Dunn William H. Jr. 4
4 · PROTHENA CORP PUBLIC LTD CO · Filed May 15, 2026
Research Summary
AI-generated summary of this filing
Prothena (PRTA) Director William H. Dunn Jr. Receives 27,000-Share Award
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.
Insider Transaction Report
Form 4
Dunn William H. Jr.
Director
Transactions
- Award
Stock Option (Right to Buy)
[F1]2026-05-15+27,000→ 27,000 totalExercise: $9.76Exp: 2036-05-15→ Ordinary Shares (27,000 underlying)
Footnotes (1)
- [F1]The shares subject to the option will vest and become exercisable as to 100% of the total number of shares subject to the option on the earlier of the first anniversary of the grant date or the day of the annual general meeting in 2027 of the Issuer's shareholders, assuming continuous service as a director until such vesting date.
Signature
/s/ Michael J. Malecek, as Attorney-in-Fact for William H. Dunn Jr.|2026-05-15