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Home › Insider trades › Prothena Corp Public Ltd › 10% owner reported a gift or transfer of 566K PRTA shares
Why it stands out Gift or transfer — classified separately from trades.
Written from the filing's own figures. OQRO describes what was reported and never tells you what to buy or sell.
All the details
Dates, kept separate
Transaction date Oct 27, 2026
Reporting period Not applicable
Filed with the SEC Oct 29, 2026 10% owner Gift / transfer
Context Classification gift transfer
Code G — gift, bequest or transfer
Planned / mechanical clue None found in footnotes
Only flagged when a footnote says so; never inferred
Source receipt
Record ID 0001045463-26-000023
Filed / recorded
Oct 29, 2026, 6:03 PM UTC
Added to OQRO Oct 29, 2026, 6:04 PM UTC
Data quality Verified: identifiers matched exactly
Issuer PROTHENA CORP PUBLIC LTD CO
Reporting person SCULLY WILLIAM P
Security Ordinary Shares, par value $0.01 per share
Table Non-derivative (Table I)
Transaction date Oct 27, 2026
Acquired / disposed Acquired (A)
Shares owned after 1,753,444
Around the same time Insider filing
Traded Nov 6 · filed 4 days later
Gift or transfer — classified separately from trades.
Insider buying
Traded Nov 9 · filed 1 day later
A major shareholder of Prothena Corp Public paid $1.19M out of pocket for Prothena Corp Public shares. Shares held went up 17% with this purchase.
Insider buying
13 days before results Traded Oct 23 · filed 3 days later
A major shareholder of Prothena Corp Public paid $404K out of pocket for Prothena Corp Public shares.
The story around this disclosure Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.
Sep 28, 2026 Insider · 4 days before an 8-K 10% owner purchased ~$890K of PRTA shares in the open market Sep 29, 2026 Insider · 3 days before an 8-K 10% owner purchased ~$1.41M of PRTA shares in the open market Oct 2, 2026 Company filing · Form 8-K · Executive change Changed a top executive or board member “On October 2, 2026, Chad J. Swanson, Ph.D., Chief Development Officer of Prothena Corporation plc (the “Company”) notified the Company that he is resigning from the Company effective October 9, 2026.” Oct 2, 2026 Insider 10% owner purchased ~$857K of PRTA shares in the open market Oct 7, 2026 Insider 10% owner purchased ~$1.05M of PRTA shares in the open market Oct 8, 2026 Insider 10% owner purchased ~$771K of PRTA shares in the open market Oct 13, 2026 Insider 10% owner purchased ~$835K of PRTA shares in the open market Oct 14, 2026 Insider 10% owner purchased ~$85K of PRTA shares in the open market Oct 22, 2026 Insider · 14 days before results 10% owner purchased ~$819K of PRTA shares in the open market Oct 23, 2026 Insider · 13 days before results 10% owner purchased ~$404K of PRTA shares in the open market What came next Oct 28, 2026 Company filing · Form 8-K · Agreement ended Ended an important agreement Nov 5, 2026 Company filing · Form 8-K · Results Reported its results Nov 9, 2026 Insider 10% owner purchased ~$1.19M of PRTA shares in the open market Nov 13, 2026 5% stake SCULLY WILLIAM P reported a passive stake (13G) of 12.5%
