SEC Form 4 · accession 0000905148-26-003409
PROTHENA CORP PUBLIC LTD CO · PRTA
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Michael John Isaacs
Officer — General Counsel & Company Sec.
Period of report
Jul 28, 2026
Accepted (ET)
Jul 30, 2026 · 8:30 pm EDT
Rule 10b5-1 plan
yes — trade under a plan
Issuer CIK
0001559053
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Ordinary Shares, par value $0.01 per share | Jul 28, 2026 | F | 4,694 | $8.56 | D | 44,131 | D | |
| Ordinary Shares, par value $0.01 per shareF2 | Jul 29, 2026 | S | 8,386 | $8.4731 | D | 35,745 | D |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1The transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on April 3, 2026.
- F2The transaction was executed in multiple trades in prices ranging from $8.40 to $8.65, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.