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person · Reporting owner

Isaacs Michael John

Disclosed activity across 1 company

Tapewire entity
27701
SEC CIK
0002127815

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
PROTHENA CORP PUBLIC LTD COPRTA · Entity 2375General Counsel & Company Sec.July 28, 2026July 31, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

PROTHENA CORP PUBLIC LTD CO

Report date July 28, 2026 · Filed July 31, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Ordinary Shares, par value $0.01 per shareSEC Table I · non-derivativeDirect35,745 Ending reported balance After 2026-07-29 transaction · row 2
2 source rows · reconciled sequence

Row 1 · 2026-07-28 · Tax withholding · Disposed 4,694 · Balance 44,131

Row 2 · 2026-07-29 · Sale · Disposed 8,386 · Balance 35,745

F1: The transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on April 3, 2026.

F2: The 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.

Filing footnotes · ownership attribution and instrument terms

F1: The transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on April 3, 2026.

F2: The 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.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
July 29, 2026 Filed Jul 31, 2026 00:30 UTC PROTHENA CORP PUBLIC LTD CO PRTA · Entity 2375 SaleOrdinary Shares, par value $0.01 per share 8,386 $8.47 $71,055.42
Disclosure

SEC source: 0000905148-26-003409 · form4.xml · nonDerivative · entry 2

Isaacs Michael John · CIK 0002127815 · General Counsel & Company Sec.

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 35,745

F1 · kind: The transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on April 3, 2026.

F2 · price: The 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.

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July 28, 2026 Filed Jul 31, 2026 00:30 UTC PROTHENA CORP PUBLIC LTD CO PRTA · Entity 2375 Tax withholdingOrdinary Shares, par value $0.01 per share 4,694 $8.56 $40,180.64
Disclosure

SEC source: 0000905148-26-003409 · form4.xml · nonDerivative · entry 1

Isaacs Michael John · CIK 0002127815 · General Counsel & Company Sec.

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 44,131

Read SEC document

Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.