{"entity":{"type":"insider","cik":"0001779336","url":"/insider/0001779336","json_url":"/insider/0001779336.json","name":"Malecek Michael J","name_source":"as-filed","also_issuer":false,"cross_url":null},"coverage_statement":{"n_transactions":36,"n_filings":12,"first":"2021-10-29","last":"2023-09-27","span_basis":"filed_date"},"name_variants":[{"name":"Malecek Michael J","source":"filing","n_filings":12,"first_seen":"2021-10-29","last_seen":"2023-09-27"}],"transactions":[{"id":8280677,"accession":"0000905148-23-001024","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0000905148-23-001024","line_url":"/filing/0000905148-23-001024","is_derivative":false,"issuer_cik":"0001559053","issuer_name":"PROTHENA CORP PUBLIC LTD CO","issuer_ticker":"PRTA","issuer_name_source":null,"issuer_url":"/issuer/0001559053","owner_cik":"0001779336","owner_name":"Malecek Michael J","owner_display_name":"Malecek Michael J","owner_url":"/insider/0001779336","role":"Officer (Chief Legal Officer)","role_mark":"O","role_mark_label":"Officer (Chief Legal Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Legal Officer","security_title":"Ordinary Shares, par value $0.01 per share","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5000.0,"shares_display":"5,000","price_per_share":47.37694024,"price_display":"47.38","price_state":"stated","total_value":236884.7012,"total_display":"236,884.70","total_whole":"236,885","shares_owned_after":404.0,"shares_owned_after_display":"404","ownership_form":"D","is_10b5_1":null,"transaction_date":"2023-09-27","filed_date":"2023-09-27","scope":"insider","n_lines":2},{"id":8424543,"accession":"0000905148-23-000803","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0000905148-23-000803","line_url":"/filing/0000905148-23-000803","is_derivative":false,"issuer_cik":"0001559053","issuer_name":"PROTHENA CORP PUBLIC LTD CO","issuer_ticker":"PRTA","issuer_name_source":null,"issuer_url":"/issuer/0001559053","owner_cik":"0001779336","owner_name":"Malecek Michael J","owner_display_name":"Malecek Michael J","owner_url":"/insider/0001779336","role":"Officer (Chief Legal Officer)","role_mark":"O","role_mark_label":"Officer (Chief Legal Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Legal Officer","security_title":"Ordinary Shares, par value $0.01 per share","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5000.0,"shares_display":"5,000","price_per_share":55.01319368,"price_display":"55.01","price_state":"stated","total_value":275065.9684,"total_display":"275,065.97","total_whole":"275,066","shares_owned_after":14.0,"shares_owned_after_display":"14","ownership_form":"D","is_10b5_1":null,"transaction_date":"2023-08-30","filed_date":"2023-08-30","scope":"insider","n_lines":3},{"id":8103429,"accession":"0001140361-23-036291","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001140361-23-036291","line_url":"/filing/0001140361-23-036291","is_derivative":false,"issuer_cik":"0001559053","issuer_name":"PROTHENA CORP PUBLIC LTD CO","issuer_ticker":"PRTA","issuer_name_source":null,"issuer_url":"/issuer/0001559053","owner_cik":"0001779336","owner_name":"Malecek Michael J","owner_display_name":"Malecek Michael J","owner_url":"/insider/0001779336","role":"Officer (Chief Legal Officer)","role_mark":"O","role_mark_label":"Officer (Chief Legal Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Legal Officer","security_title":"Ordinary Shares, par value $0.01 per share","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5000.0,"shares_display":"5,000","price_per_share":62.3276392,"price_display":"62.33","price_state":"stated","total_value":311638.196,"total_display":"311,638.20","total_whole":"311,638","shares_owned_after":2523.0,"shares_owned_after_display":"2,523","ownership_form":"D","is_10b5_1":null,"transaction_date":"2023-07-26","filed_date":"2023-07-26","scope":"insider","n_lines":3},{"id":8068456,"accession":"0001140361-23-032003","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001140361-23-032003","line_url":"/filing/0001140361-23-032003","is_derivative":false,"issuer_cik":"0001559053","issuer_name":"PROTHENA CORP PUBLIC LTD CO","issuer_ticker":"PRTA","issuer_name_source":null,"issuer_url":"/issuer/0001559053","owner_cik":"0001779336","owner_name":"Malecek Michael J","owner_display_name":"Malecek Michael J","owner_url":"/insider/0001779336","role":"Officer (Chief Legal Officer)","role_mark":"O","role_mark_label":"Officer (Chief Legal Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Legal Officer","security_title":"Ordinary Shares, par value $0.01 per share","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5000.0,"shares_display":"5,000","price_per_share":69.8235292,"price_display":"69.82","price_state":"stated","total_value":349117.646,"total_display":"349,117.65","total_whole":"349,118","shares_owned_after":710.0,"shares_owned_after_display":"710","ownership_form":"D","is_10b5_1":null,"transaction_date":"2023-06-28","filed_date":"2023-06-28","scope":"insider","n_lines":3},{"id":8103355,"accession":"0001140361-23-027617","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001140361-23-027617","line_url":"/filing/0001140361-23-027617","is_derivative":false,"issuer_cik":"0001559053","issuer_name":"PROTHENA CORP PUBLIC LTD CO","issuer_ticker":"PRTA","issuer_name_source":null,"issuer_url":"/issuer/0001559053","owner_cik":"0001779336","owner_name":"Malecek Michael J","owner_display_name":"Malecek Michael J","owner_url":"/insider/0001779336","role":"Officer (Chief Legal Officer)","role_mark":"O","role_mark_label":"Officer (Chief Legal Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Legal Officer","security_title":"Ordinary Shares, par value $0.01 per share","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5000.0,"shares_display":"5,000","price_per_share":64.64458304,"price_display":"64.64","price_state":"stated","total_value":323222.9152,"total_display":"323,222.92","total_whole":"323,223","shares_owned_after":1789.0,"shares_owned_after_display":"1,789","ownership_form":"D","is_10b5_1":null,"transaction_date":"2023-05-31","filed_date":"2023-05-31","scope":"insider","n_lines":3},{"id":7993948,"accession":"0001140361-23-021747","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001140361-23-021747","line_url":"/filing/0001140361-23-021747","is_derivative":false,"issuer_cik":"0001559053","issuer_name":"PROTHENA CORP PUBLIC LTD CO","issuer_ticker":"PRTA","issuer_name_source":null,"issuer_url":"/issuer/0001559053","owner_cik":"0001779336","owner_name":"Malecek Michael J","owner_display_name":"Malecek Michael J","owner_url":"/insider/0001779336","role":"Officer (Chief Legal Officer)","role_mark":"O","role_mark_label":"Officer (Chief Legal Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Legal Officer","security_title":"Ordinary Shares, par value $0.01 per share","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5000.0,"shares_display":"5,000","price_per_share":53.4584848,"price_display":"53.46","price_state":"stated","total_value":267292.424,"total_display":"267,292.42","total_whole":"267,292","shares_owned_after":320.0,"shares_owned_after_display":"320","ownership_form":"D","is_10b5_1":null,"transaction_date":"2023-04-26","filed_date":"2023-04-28","scope":"insider","n_lines":2},{"id":8604487,"accession":"0001140361-23-015527","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001140361-23-015527","line_url":"/filing/0001140361-23-015527","is_derivative":false,"issuer_cik":"0001559053","issuer_name":"PROTHENA CORP PUBLIC LTD CO","issuer_ticker":"PRTA","issuer_name_source":null,"issuer_url":"/issuer/0001559053","owner_cik":"0001779336","owner_name":"Malecek Michael J","owner_display_name":"Malecek Michael J","owner_url":"/insider/0001779336","role":"Officer (Chief Legal Officer)","role_mark":"O","role_mark_label":"Officer (Chief Legal Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Legal Officer","security_title":"Ordinary Shares, par value $0.01 per share","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5000.0,"shares_display":"5,000","price_per_share":49.02464588,"price_display":"49.02","price_state":"stated","total_value":245123.2294,"total_display":"245,123.23","total_whole":"245,123","shares_owned_after":2266.0,"shares_owned_after_display":"2,266","ownership_form":"D","is_10b5_1":null,"transaction_date":"2023-03-29","filed_date":"2023-03-31","scope":"insider","n_lines":2},{"id":8267324,"accession":"0001567619-23-005290","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001567619-23-005290","line_url":"/filing/0001567619-23-005290","is_derivative":false,"issuer_cik":"0001559053","issuer_name":"PROTHENA CORP PUBLIC LTD CO","issuer_ticker":"PRTA","issuer_name_source":null,"issuer_url":"/issuer/0001559053","owner_cik":"0001779336","owner_name":"Malecek Michael J","owner_display_name":"Malecek Michael J","owner_url":"/insider/0001779336","role":"Officer (Chief Legal Officer)","role_mark":"O","role_mark_label":"Officer (Chief Legal Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Legal Officer","security_title":"Ordinary Shares, par value $0.01 per share","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":15000.0,"shares_display":"15,000","price_per_share":48.439463866666664,"price_display":"48.44","price_state":"stated","total_value":726591.958,"total_display":"726,591.96","total_whole":"726,592","shares_owned_after":0.0,"shares_owned_after_display":"0","ownership_form":"D","is_10b5_1":null,"transaction_date":"2023-03-15","filed_date":"2023-03-17","scope":"insider","n_lines":2},{"id":6964423,"accession":"0001140361-22-044321","txn_seq":8,"anchor":"line-8","filing_url":"/filing/0001140361-22-044321","line_url":"/filing/0001140361-22-044321","is_derivative":false,"issuer_cik":"0001559053","issuer_name":"PROTHENA CORP PUBLIC LTD CO","issuer_ticker":"PRTA","issuer_name_source":null,"issuer_url":"/issuer/0001559053","owner_cik":"0001779336","owner_name":"Malecek Michael J","owner_display_name":"Malecek Michael J","owner_url":"/insider/0001779336","role":"Officer (Chief Legal Officer)","role_mark":"O","role_mark_label":"Officer (Chief Legal Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Legal Officer","security_title":"Ordinary Shares, par value $0.01 per share","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5000.0,"shares_display":"5,000","price_per_share":62.27517504,"price_display":"62.28","price_state":"stated","total_value":311375.8752,"total_display":"311,375.88","total_whole":"311,376","shares_owned_after":3162.0,"shares_owned_after_display":"3,162","ownership_form":"D","is_10b5_1":null,"transaction_date":"2022-11-30","filed_date":"2022-12-02","scope":"insider","n_lines":7},{"id":6865160,"accession":"0001567619-22-018925","txn_seq":6,"anchor":"line-6","filing_url":"/filing/0001567619-22-018925","line_url":"/filing/0001567619-22-018925#line-6","is_derivative":false,"issuer_cik":"0001559053","issuer_name":"PROTHENA CORP PUBLIC LTD CO","issuer_ticker":"PRTA","issuer_name_source":null,"issuer_url":"/issuer/0001559053","owner_cik":"0001779336","owner_name":"Malecek Michael J","owner_display_name":"Malecek Michael J","owner_url":"/insider/0001779336","role":"Officer (Chief Legal Officer)","role_mark":"O","role_mark_label":"Officer (Chief Legal Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Legal Officer","security_title":"Ordinary Shares, par value $0.01 per share","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":20000.0,"shares_display":"20,000","price_per_share":62.0002,"price_display":"62.00","price_state":"stated","total_value":1240004.0,"total_display":"1,240,004.00","total_whole":"1,240,004","shares_owned_after":0.0,"shares_owned_after_display":"0","ownership_form":"D","is_10b5_1":null,"transaction_date":"2022-10-27","filed_date":"2022-10-28","scope":"insider"},{"id":6865152,"accession":"0001567619-22-018925","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001567619-22-018925","line_url":"/filing/0001567619-22-018925","is_derivative":false,"issuer_cik":"0001559053","issuer_name":"PROTHENA CORP PUBLIC LTD CO","issuer_ticker":"PRTA","issuer_name_source":null,"issuer_url":"/issuer/0001559053","owner_cik":"0001779336","owner_name":"Malecek Michael J","owner_display_name":"Malecek Michael J","owner_url":"/insider/0001779336","role":"Officer (Chief Legal Officer)","role_mark":"O","role_mark_label":"Officer (Chief Legal Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Legal Officer","security_title":"Ordinary Shares, par value $0.01 per share","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":65000.0,"shares_display":"65,000","price_per_share":60.30995050461539,"price_display":"60.31","price_state":"stated","total_value":3920146.7828,"total_display":"3,920,146.78","total_whole":"3,920,147","shares_owned_after":19720.0,"shares_owned_after_display":"19,720","ownership_form":"D","is_10b5_1":null,"transaction_date":"2022-10-26","filed_date":"2022-10-28","scope":"insider","n_lines":3},{"id":4108826,"accession":"0001567619-21-020909","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001567619-21-020909","line_url":"/filing/0001567619-21-020909#line-2","is_derivative":false,"issuer_cik":"0001559053","issuer_name":"PROTHENA CORP PUBLIC LTD CO","issuer_ticker":"PRTA","issuer_name_source":null,"issuer_url":"/issuer/0001559053","owner_cik":"0001779336","owner_name":"Malecek Michael J","owner_display_name":"Malecek Michael J","owner_url":"/insider/0001779336","role":"Officer","role_mark":"O","role_mark_label":"Officer","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"See Remarks","security_title":"Ordinary Shares, par value $0.01 per share","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":10000.0,"shares_display":"10,000","price_per_share":55.0,"price_display":"55.00","price_state":"stated","total_value":550000.0,"total_display":"550,000.00","total_whole":"550,000","shares_owned_after":0.0,"shares_owned_after_display":"0","ownership_form":"D","is_10b5_1":null,"transaction_date":"2021-11-19","filed_date":"2021-11-19","scope":"insider"},{"id":5157094,"accession":"0001567619-21-019011","txn_seq":5,"anchor":"line-5","filing_url":"/filing/0001567619-21-019011","line_url":"/filing/0001567619-21-019011","is_derivative":false,"issuer_cik":"0001559053","issuer_name":"PROTHENA CORP PUBLIC LTD CO","issuer_ticker":"PRTA","issuer_name_source":null,"issuer_url":"/issuer/0001559053","owner_cik":"0001779336","owner_name":"Malecek Michael J","owner_display_name":"Malecek Michael J","owner_url":"/insider/0001779336","role":"Officer","role_mark":"O","role_mark_label":"Officer","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"See Remarks","security_title":"Ordinary Shares, par value $0.01 per share","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":10000.0,"shares_display":"10,000","price_per_share":58.52497968,"price_display":"58.52","price_state":"stated","total_value":585249.7968,"total_display":"585,249.80","total_whole":"585,250","shares_owned_after":4036.0,"shares_owned_after_display":"4,036","ownership_form":"D","is_10b5_1":null,"transaction_date":"2021-10-27","filed_date":"2021-10-29","scope":"insider","n_lines":4}],"collapsed":true,"next_cursor":null,"ledger_fault":false,"count":{"value":36,"kind":"exact"},"open_market_only":false,"composition":{"kind":"exact","rows":[{"code":"P","label":"Open-market purchase","n":0,"open_market":true},{"code":"S","label":"Open-market sale","n":36,"open_market":true},{"code":"M","label":"Option exercise","n":0,"open_market":false},{"code":"A","label":"Grant or award","n":0,"open_market":false},{"code":"F","label":"Tax withholding","n":0,"open_market":false},{"code":"D","label":"Disposition to the issuer","n":0,"open_market":false},{"code":"X","label":"In-the-money option exercise","n":0,"open_market":false}],"total":36},"affiliations":[{"type":"issuer","type_label":"ISSUER","cik":"0001559053","name":"PROTHENA CORP PUBLIC LTD CO","url":"/issuer/0001559053","role":"Officer (Chief Legal Officer)","n_filings":12,"first_seen":"2021-10-29","last_seen":"2023-09-27"}],"order_statement":"Newest transaction date first, id breaking the tie.","canonical_url":"https://ebomi.com/insider/0001779336","retrieved_at":"2026-08-23T11:10:05+00:00","coverage":{"filings":1506293,"transactions":4290787,"issuers":28597,"insiders":152303,"first_filed_date":"2003-06-30","last_filed_date":"2026-08-21","last_ingest":"2026-08-22T05:23:40.159918+00:00","counts_are":{"filings":"estimate","transactions":"estimate","issuers":"estimate","insiders":"estimate"},"source":"SEC EDGAR Form 4 filings, parsed by ebomi","fault":false},"license":{"underlying_records":"US SEC filings are public records of the United States government and are not subject to copyright. The transactional facts in them are not ours to license.","this_presentation":"The parsing, normalisation, curation, and presentation are ebomi's own work.","grant":"undecided","grant_note":"The open licence for ebomi's own layer is an open owner decision (SPEC-20260731T1159Z open question 3: CC BY 4.0 or CC0 with a citation request). Until it is taken, no grant is asserted here.","citation_request":"Balogh, A. Insider trading. Scientific Data 10, 237 (2023)","url":"https://ebomi.com/license"},"fair_use":{"policy":"These JSON endpoints are open and unauthenticated. Please read them at a human pace, identify your client in the User-Agent header, and use the published dataset for bulk work rather than crawling page by page.","bulk_alternative":"doi:10.1038/s41597-023-02147-6"}}