Latest filing published 30 Jul 2025 for Prothena CORP Public Ltd Co.
Insider track record
Not enough buy signals with a settled T+90 horizon to measure a track record yet.
Michael J. Malecek: trading record in brief
Michael J. Malecek is a declared insider of Prothena CORP Public Ltd Co (chief executive), with filings sourced from SEC (Form 4). We count 50 filings; the first trade dates from 27 October 2021 and the latest from 28 July 2025.
Every open-market trade on record is a sale: 36 sales worth €8.9M. The rest of the record consists of 1 share grant and 13 option exercises.
Most recently, on 30 July 2025, the filings show a share grant in Prothena CORP Public Ltd Co. Typically, a trade is published a median of 2 days after it takes place. For comparison, the SEC allows two business days to file a Form 4. Keep in mind that insiders sell for many reasons unrelated to the outlook, from tax bills to estate planning. Source: insider filings from SEC (Form 4). Past trades are no guide to future returns.
Companies and markets linked to Michael J. Malecek
Open company profiles for insider transactions, fundamentals and analyst consensus when available.
- 80,000 shares0Ordinary Shares, par value $0.01 per shareSEC:0000905148-25-002657:0
- 5,000 shares@ US$10.273.2% of flowOrdinary Shares, par value $0.01 per shareSEC:0000905148-23-001024:0
- 5,000 shares@ US$10.273.0% of flowOrdinary Shares, par value $0.01 per shareSEC:0000905148-23-000803:0
- 5,000 shares@ US$10.273.0% of flowOrdinary Shares, par value $0.01 per shareSEC:0001140361-23-036291:0
- 5,000 shares@ US$10.273.0% of flowOrdinary Shares, par value $0.01 per shareSEC:0001140361-23-032003:0
- 5,000 shares@ US$10.273.1% of flowOrdinary Shares, par value $0.01 per shareSEC:0001140361-23-027617:0
- 5,000 shares@ US$10.273.0% of flowOrdinary Shares, par value $0.01 per shareSEC:0001140361-23-021747:0
- 5,000 shares@ US$10.273.1% of flowOrdinary Shares, par value $0.01 per shareSEC:0001140361-23-015527:0
- 15,000 shares@ US$10.279.3% of flowOrdinary Shares, par value $0.01 per shareSEC:0001567619-23-005290:0
- 5,000 shares@ US$10.273.2% of flowOrdinary Shares, par value $0.01 per shareSEC:0001140361-22-044321:0
- 65,000 shares@ US$10.2742.9% of flowOrdinary Shares, par value $0.01 per shareSEC:0001567619-22-018925:0
- 10,000 shares@ US$10.276.6% of flowOrdinary Shares, par value $0.01 per shareSEC:0001567619-21-020909:0
- 10,000 shares@ US$10.276.5% of flowOrdinary Shares, par value $0.01 per shareSEC:0001567619-21-019011:0
13 of 13 declarations
