{"entity":{"type":"insider","cik":"0001263964","url":"/insider/0001263964","json_url":"/insider/0001263964.json","name":"SMART WILLIAM D","name_source":"as-filed","also_issuer":false,"cross_url":null},"coverage_statement":{"n_transactions":15,"n_filings":14,"first":"2003-09-17","last":"2003-12-23","span_basis":"filed_date"},"name_variants":[{"name":"SMART WILLIAM D","source":"filing","n_filings":14,"first_seen":"2003-09-17","last_seen":"2003-12-23"}],"transactions":[{"id":107045,"accession":"0001209191-03-036364","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001209191-03-036364","line_url":"/filing/0001209191-03-036364#line-2","is_derivative":false,"issuer_cik":"0000892025","issuer_name":"MARTEK BIOSCIENCES CORP","issuer_ticker":"MATK","issuer_name_source":null,"issuer_url":"/issuer/0000892025","owner_cik":"0001263964","owner_name":"SMART WILLIAM D","owner_display_name":"SMART WILLIAM D","owner_url":"/insider/0001263964","role":"Director","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":7500.0,"shares_display":"7,500","price_per_share":61.2999,"price_display":"61.30","price_state":"stated","total_value":459749.25,"total_display":"459,749.25","total_whole":"459,749","shares_owned_after":0.0,"shares_owned_after_display":"0","ownership_form":"D","is_10b5_1":null,"transaction_date":"2003-12-19","filed_date":"2003-12-23","scope":"insider"},{"id":50758,"accession":"0001209191-03-035702","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001209191-03-035702","line_url":"/filing/0001209191-03-035702#line-2","is_derivative":false,"issuer_cik":"0000892025","issuer_name":"MARTEK BIOSCIENCES CORP","issuer_ticker":"MATK","issuer_name_source":null,"issuer_url":"/issuer/0000892025","owner_cik":"0001263964","owner_name":"SMART WILLIAM D","owner_display_name":"SMART WILLIAM D","owner_url":"/insider/0001263964","role":"Director","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":7500.0,"shares_display":"7,500","price_per_share":58.7561,"price_display":"58.76","price_state":"stated","total_value":440670.75,"total_display":"440,670.75","total_whole":"440,671","shares_owned_after":0.0,"shares_owned_after_display":"0","ownership_form":"D","is_10b5_1":null,"transaction_date":"2003-12-12","filed_date":"2003-12-18","scope":"insider"},{"id":200782,"accession":"0001209191-03-034098","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001209191-03-034098","line_url":"/filing/0001209191-03-034098#line-2","is_derivative":false,"issuer_cik":"0000892025","issuer_name":"MARTEK BIOSCIENCES CORP","issuer_ticker":"MATK","issuer_name_source":null,"issuer_url":"/issuer/0000892025","owner_cik":"0001263964","owner_name":"SMART WILLIAM D","owner_display_name":"SMART WILLIAM D","owner_url":"/insider/0001263964","role":"Director","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":7500.0,"shares_display":"7,500","price_per_share":58.8762,"price_display":"58.88","price_state":"stated","total_value":441571.5,"total_display":"441,571.50","total_whole":"441,572","shares_owned_after":0.0,"shares_owned_after_display":"0","ownership_form":"D","is_10b5_1":null,"transaction_date":"2003-12-05","filed_date":"2003-12-09","scope":"insider"},{"id":118197,"accession":"0001209191-03-032288","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001209191-03-032288","line_url":"/filing/0001209191-03-032288#line-4","is_derivative":false,"issuer_cik":"0000892025","issuer_name":"MARTEK BIOSCIENCES CORP","issuer_ticker":"MATK","issuer_name_source":null,"issuer_url":"/issuer/0000892025","owner_cik":"0001263964","owner_name":"SMART WILLIAM D","owner_display_name":"SMART WILLIAM D","owner_url":"/insider/0001263964","role":"Director","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":7500.0,"shares_display":"7,500","price_per_share":56.2222,"price_display":"56.22","price_state":"stated","total_value":421666.5,"total_display":"421,666.50","total_whole":"421,667","shares_owned_after":0.0,"shares_owned_after_display":"0","ownership_form":"D","is_10b5_1":null,"transaction_date":"2003-11-21","filed_date":"2003-11-25","scope":"insider"},{"id":118195,"accession":"0001209191-03-032288","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001209191-03-032288","line_url":"/filing/0001209191-03-032288#line-2","is_derivative":false,"issuer_cik":"0000892025","issuer_name":"MARTEK BIOSCIENCES CORP","issuer_ticker":"MATK","issuer_name_source":null,"issuer_url":"/issuer/0000892025","owner_cik":"0001263964","owner_name":"SMART WILLIAM D","owner_display_name":"SMART WILLIAM D","owner_url":"/insider/0001263964","role":"Director","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":7500.0,"shares_display":"7,500","price_per_share":54.5983,"price_display":"54.60","price_state":"stated","total_value":409487.25,"total_display":"409,487.25","total_whole":"409,487","shares_owned_after":0.0,"shares_owned_after_display":"0","ownership_form":"D","is_10b5_1":null,"transaction_date":"2003-11-14","filed_date":"2003-11-25","scope":"insider"},{"id":21790,"accession":"0001209191-03-029752","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001209191-03-029752","line_url":"/filing/0001209191-03-029752#line-2","is_derivative":false,"issuer_cik":"0000892025","issuer_name":"MARTEK BIOSCIENCES CORP","issuer_ticker":"MATK","issuer_name_source":null,"issuer_url":"/issuer/0000892025","owner_cik":"0001263964","owner_name":"SMART WILLIAM D","owner_display_name":"SMART WILLIAM D","owner_url":"/insider/0001263964","role":"Director","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":7500.0,"shares_display":"7,500","price_per_share":49.159,"price_display":"49.16","price_state":"stated","total_value":368692.5,"total_display":"368,692.50","total_whole":"368,693","shares_owned_after":7500.0,"shares_owned_after_display":"7,500","ownership_form":"D","is_10b5_1":null,"transaction_date":"2003-11-07","filed_date":"2003-11-12","scope":"insider"},{"id":9257831,"accession":"0001209191-03-032440","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001209191-03-032440","line_url":"/filing/0001209191-03-032440#line-1","is_derivative":false,"issuer_cik":"0001263964","issuer_name":"MARTEK BIOSCIENCES CORP","issuer_ticker":"MATK","issuer_name_source":null,"issuer_url":"/issuer/0001263964","owner_cik":"0001263964","owner_name":"SMART WILLIAM D","owner_display_name":"SMART WILLIAM D","owner_url":"/insider/0001263964","role":"Director","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":7500.0,"shares_display":"7,500","price_per_share":48.4834,"price_display":"48.48","price_state":"stated","total_value":363625.5,"total_display":"363,625.50","total_whole":"363,626","shares_owned_after":0.0,"shares_owned_after_display":"0","ownership_form":"D","is_10b5_1":null,"transaction_date":"2003-10-31","filed_date":"2003-11-26","scope":"insider"},{"id":15319,"accession":"0001209191-03-028325","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001209191-03-028325","line_url":"/filing/0001209191-03-028325#line-2","is_derivative":false,"issuer_cik":"0000892025","issuer_name":"MARTEK BIOSCIENCES CORP","issuer_ticker":"MATK","issuer_name_source":null,"issuer_url":"/issuer/0000892025","owner_cik":"0001263964","owner_name":"SMART WILLIAM D","owner_display_name":"SMART WILLIAM D","owner_url":"/insider/0001263964","role":"Director","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":7500.0,"shares_display":"7,500","price_per_share":48.4834,"price_display":"48.48","price_state":"stated","total_value":363625.5,"total_display":"363,625.50","total_whole":"363,626","shares_owned_after":0.0,"shares_owned_after_display":"0","ownership_form":"D","is_10b5_1":null,"transaction_date":"2003-10-31","filed_date":"2003-11-04","scope":"insider"},{"id":64153,"accession":"0001209191-03-026876","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001209191-03-026876","line_url":"/filing/0001209191-03-026876#line-2","is_derivative":false,"issuer_cik":"0000892025","issuer_name":"MARTEK BIOSCIENCES CORP","issuer_ticker":"MATK","issuer_name_source":null,"issuer_url":"/issuer/0000892025","owner_cik":"0001263964","owner_name":"SMART WILLIAM D","owner_display_name":"SMART WILLIAM D","owner_url":"/insider/0001263964","role":"Director","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":7500.0,"shares_display":"7,500","price_per_share":45.7969,"price_display":"45.80","price_state":"stated","total_value":343476.75,"total_display":"343,476.75","total_whole":"343,477","shares_owned_after":7500.0,"shares_owned_after_display":"7,500","ownership_form":"D","is_10b5_1":null,"transaction_date":"2003-10-24","filed_date":"2003-10-27","scope":"insider"},{"id":19258,"accession":"0001209191-03-026059","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001209191-03-026059","line_url":"/filing/0001209191-03-026059#line-2","is_derivative":false,"issuer_cik":"0000892025","issuer_name":"MARTEK BIOSCIENCES CORP","issuer_ticker":"MATK","issuer_name_source":null,"issuer_url":"/issuer/0000892025","owner_cik":"0001263964","owner_name":"SMART WILLIAM D","owner_display_name":"SMART WILLIAM D","owner_url":"/insider/0001263964","role":"Director","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"common stock","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":47.4434,"price_display":"47.44","price_state":"stated","total_value":237217.0,"total_display":"237,217.00","total_whole":"237,217","shares_owned_after":0.0,"shares_owned_after_display":"0","ownership_form":"D","is_10b5_1":null,"transaction_date":"2003-10-17","filed_date":"2003-10-20","scope":"insider"},{"id":132546,"accession":"0001209191-03-025425","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001209191-03-025425","line_url":"/filing/0001209191-03-025425#line-2","is_derivative":false,"issuer_cik":"0000892025","issuer_name":"MARTEK BIOSCIENCES CORP","issuer_ticker":"MATK","issuer_name_source":null,"issuer_url":"/issuer/0000892025","owner_cik":"0001263964","owner_name":"SMART WILLIAM D","owner_display_name":"SMART WILLIAM D","owner_url":"/insider/0001263964","role":"Director","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"common stock","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":51.5364,"price_display":"51.54","price_state":"stated","total_value":257682.0,"total_display":"257,682.00","total_whole":"257,682","shares_owned_after":0.0,"shares_owned_after_display":"0","ownership_form":"D","is_10b5_1":null,"transaction_date":"2003-10-10","filed_date":"2003-10-14","scope":"insider"},{"id":6962,"accession":"0001209191-03-024778","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001209191-03-024778","line_url":"/filing/0001209191-03-024778#line-2","is_derivative":false,"issuer_cik":"0000892025","issuer_name":"MARTEK BIOSCIENCES CORP","issuer_ticker":"MATK","issuer_name_source":null,"issuer_url":"/issuer/0000892025","owner_cik":"0001263964","owner_name":"SMART WILLIAM D","owner_display_name":"SMART WILLIAM D","owner_url":"/insider/0001263964","role":"Director","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"common stock","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":55.1152,"price_display":"55.12","price_state":"stated","total_value":275576.0,"total_display":"275,576.00","total_whole":"275,576","shares_owned_after":0.0,"shares_owned_after_display":"0","ownership_form":"D","is_10b5_1":null,"transaction_date":"2003-10-03","filed_date":"2003-10-06","scope":"insider"},{"id":15286,"accession":"0001209191-03-023282","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001209191-03-023282","line_url":"/filing/0001209191-03-023282#line-2","is_derivative":false,"issuer_cik":"0000892025","issuer_name":"MARTEK BIOSCIENCES CORP","issuer_ticker":"MATK","issuer_name_source":null,"issuer_url":"/issuer/0000892025","owner_cik":"0001263964","owner_name":"SMART WILLIAM D","owner_display_name":"SMART WILLIAM D","owner_url":"/insider/0001263964","role":"Director","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"common stock","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":52.46,"price_display":"52.46","price_state":"stated","total_value":262300.0,"total_display":"262,300.00","total_whole":"262,300","shares_owned_after":0.0,"shares_owned_after_display":"0","ownership_form":"D","is_10b5_1":null,"transaction_date":"2003-09-26","filed_date":"2003-09-29","scope":"insider"},{"id":56927,"accession":"0001209191-03-022393","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001209191-03-022393","line_url":"/filing/0001209191-03-022393#line-2","is_derivative":false,"issuer_cik":"0000892025","issuer_name":"MARTEK BIOSCIENCES CORP","issuer_ticker":"MATK","issuer_name_source":null,"issuer_url":"/issuer/0000892025","owner_cik":"0001263964","owner_name":"SMART WILLIAM D","owner_display_name":"SMART WILLIAM D","owner_url":"/insider/0001263964","role":"Director","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3500.0,"shares_display":"3,500","price_per_share":54.2458,"price_display":"54.25","price_state":"stated","total_value":189860.3,"total_display":"189,860.30","total_whole":"189,860","shares_owned_after":0.0,"shares_owned_after_display":"0","ownership_form":"D","is_10b5_1":null,"transaction_date":"2003-09-19","filed_date":"2003-09-22","scope":"insider"},{"id":197166,"accession":"0001209191-03-021947","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001209191-03-021947","line_url":"/filing/0001209191-03-021947#line-3","is_derivative":false,"issuer_cik":"0000892025","issuer_name":"MARTEK BIOSCIENCES CORP","issuer_ticker":"MATK","issuer_name_source":null,"issuer_url":"/issuer/0000892025","owner_cik":"0001263964","owner_name":"SMART WILLIAM D","owner_display_name":"SMART WILLIAM D","owner_url":"/insider/0001263964","role":"Director","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"Common Stock","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":51.27,"price_display":"51.27","price_state":"stated","total_value":256350.0,"total_display":"256,350.00","total_whole":"256,350","shares_owned_after":30150.0,"shares_owned_after_display":"30,150","ownership_form":"D","is_10b5_1":null,"transaction_date":"2003-09-12","filed_date":"2003-09-17","scope":"insider"}],"collapsed":true,"next_cursor":null,"ledger_fault":false,"count":{"value":15,"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":15,"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":15},"affiliations":[{"type":"issuer","type_label":"ISSUER","cik":"0000892025","name":"MARTEK BIOSCIENCES CORP","url":"/issuer/0000892025","role":"Director","n_filings":14,"first_seen":"2003-09-17","last_seen":"2003-12-23"}],"order_statement":"Newest transaction date first, id breaking the tie.","canonical_url":"https://ebomi.com/insider/0001263964","retrieved_at":"2026-08-27T04:10:42+00:00","coverage":{"filings":1506293,"transactions":4290787,"issuers":28597,"insiders":152303,"first_filed_date":"2003-06-30","last_filed_date":"2026-08-25","last_ingest":"2026-08-26T05:24:25.741053+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"}}