Director William P. Scully filed a Form 4 with the SEC on August 18, 2026, reporting two gift transactions involving ordinary shares of Prothena Corp Public Ltd Co, traded on NASDAQ:PRTA.

Key Highlights

  • First transaction: On August 17, 2026, Scully acquired 336,000 ordinary shares via a gift (transaction code G) at a price of $0, bringing his direct holdings to 1,377,553 shares.
  • Second transaction: On August 18, 2026, Scully disposed of 627,553 ordinary shares via a gift (transaction code G) at a price of $0, reducing his direct holdings to 750,000 shares.
  • Indirect holdings: Scully also holds 83,500 ordinary shares indirectly through Manatee Equity Fund LLC and 52,000 ordinary shares indirectly through his spouse.
  • Disclaimer: Scully disclaims beneficial ownership of the shares held by Manatee Equity Fund LLC except to the extent of his pecuniary interest therein.
  • Security: All shares are ordinary shares with a par value of $0.01 per share.

Scully Gift Transactions Alter Direct Ownership in Prothena

According to the filing, William P. Scully, a director of Prothena Corp Public Ltd Co (NASDAQ:PRTA), reported two gift transactions in the company's ordinary shares over consecutive days. On August 17, 2026, Scully acquired 336,000 ordinary shares by gift at $0, which the filing shows increased his directly held position to 1,377,553 shares. The following day, August 18, 2026, he disposed of 627,553 ordinary shares, also by gift and at $0, reducing his direct beneficial ownership to 750,000 shares.

Both transactions carry transaction code G, indicating gifts rather than open-market purchases or sales, according to the filing. No derivative securities were reported in Table II. The form was signed on August 18, 2026, by Reid E. Buchanan by power of attorney on behalf of Scully.

In addition to his direct holdings of 750,000 shares following the reported transactions, the filing indicates Scully indirectly holds 83,500 shares through Manatee Equity Fund LLC and 52,000 shares through his spouse. Regarding the shares held by Manatee Equity Fund LLC, the filing states that Scully "disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein."

What Was Disclosed

Scully's Form 4 discloses two gift transactions in Prothena ordinary shares dated August 17 and August 18, 2026, resulting in a direct holding of 750,000 shares, plus indirect holdings of 83,500 shares via Manatee Equity Fund LLC and 52,000 shares via his spouse.