{"entity":{"type":"insider","cik":"0001379941","url":"/insider/0001379941","json_url":"/insider/0001379941.json","name":"Lee Howard","name_source":"as-filed","also_issuer":false,"cross_url":null},"coverage_statement":{"n_transactions":21,"n_filings":12,"first":"2014-08-27","last":"2023-06-05","span_basis":"filed_date"},"name_variants":[{"name":"Lee Howard","source":"filing","n_filings":12,"first_seen":"2014-08-27","last_seen":"2023-06-05"}],"transactions":[{"id":8014693,"accession":"0001104659-23-068054","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001104659-23-068054","line_url":"/filing/0001104659-23-068054#line-2","is_derivative":false,"issuer_cik":"0001297184","issuer_name":"Amphastar Pharmaceuticals, Inc.","issuer_ticker":"AMPH","issuer_name_source":null,"issuer_url":"/issuer/0001297184","owner_cik":"0001379941","owner_name":"Lee Howard","owner_display_name":"Lee Howard","owner_url":"/insider/0001379941","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":16679.0,"shares_display":"16,679","price_per_share":45.0243,"price_display":"45.02","price_state":"stated","total_value":750960.2997,"total_display":"750,960.30","total_whole":"750,960","shares_owned_after":142939.0,"shares_owned_after_display":"142,939","ownership_form":"D","is_10b5_1":null,"transaction_date":"2023-06-01","filed_date":"2023-06-05","scope":"insider"},{"id":6718328,"accession":"0001104659-22-069072","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001104659-22-069072","line_url":"/filing/0001104659-22-069072#line-2","is_derivative":false,"issuer_cik":"0001297184","issuer_name":"Amphastar Pharmaceuticals, Inc.","issuer_ticker":"AMPH","issuer_name_source":null,"issuer_url":"/issuer/0001297184","owner_cik":"0001379941","owner_name":"Lee Howard","owner_display_name":"Lee Howard","owner_url":"/insider/0001379941","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":10291.0,"shares_display":"10,291","price_per_share":37.7863,"price_display":"37.79","price_state":"stated","total_value":388858.8133,"total_display":"388,858.81","total_whole":"388,859","shares_owned_after":138776.0,"shares_owned_after_display":"138,776","ownership_form":"D","is_10b5_1":null,"transaction_date":"2022-06-06","filed_date":"2022-06-07","scope":"insider"},{"id":6718283,"accession":"0001104659-22-064834","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001104659-22-064834","line_url":"/filing/0001104659-22-064834#line-2","is_derivative":false,"issuer_cik":"0001297184","issuer_name":"Amphastar Pharmaceuticals, Inc.","issuer_ticker":"AMPH","issuer_name_source":null,"issuer_url":"/issuer/0001297184","owner_cik":"0001379941","owner_name":"Lee Howard","owner_display_name":"Lee Howard","owner_url":"/insider/0001379941","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":10000.0,"shares_display":"10,000","price_per_share":34.9323,"price_display":"34.93","price_state":"stated","total_value":349323.0,"total_display":"349,323.00","total_whole":"349,323","shares_owned_after":138776.0,"shares_owned_after_display":"138,776","ownership_form":"D","is_10b5_1":null,"transaction_date":"2022-05-23","filed_date":"2022-05-25","scope":"insider"},{"id":4616909,"accession":"0001104659-21-078411","txn_seq":5,"anchor":"line-5","filing_url":"/filing/0001104659-21-078411","line_url":"/filing/0001104659-21-078411#line-5","is_derivative":false,"issuer_cik":"0001297184","issuer_name":"Amphastar Pharmaceuticals, Inc.","issuer_ticker":"AMPH","issuer_name_source":null,"issuer_url":"/issuer/0001297184","owner_cik":"0001379941","owner_name":"Lee Howard","owner_display_name":"Lee Howard","owner_url":"/insider/0001379941","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":8000.0,"shares_display":"8,000","price_per_share":19.3135,"price_display":"19.31","price_state":"stated","total_value":154508.0,"total_display":"154,508.00","total_whole":"154,508","shares_owned_after":138933.0,"shares_owned_after_display":"138,933","ownership_form":"D","is_10b5_1":null,"transaction_date":"2021-06-08","filed_date":"2021-06-08","scope":"insider"},{"id":4616900,"accession":"0001104659-21-078411","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001104659-21-078411","line_url":"/filing/0001104659-21-078411#line-3","is_derivative":false,"issuer_cik":"0001297184","issuer_name":"Amphastar Pharmaceuticals, Inc.","issuer_ticker":"AMPH","issuer_name_source":null,"issuer_url":"/issuer/0001297184","owner_cik":"0001379941","owner_name":"Lee Howard","owner_display_name":"Lee Howard","owner_url":"/insider/0001379941","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":7827.0,"shares_display":"7,827","price_per_share":19.2847,"price_display":"19.28","price_state":"stated","total_value":150941.3469,"total_display":"150,941.35","total_whole":"150,941","shares_owned_after":132914.0,"shares_owned_after_display":"132,914","ownership_form":"D","is_10b5_1":null,"transaction_date":"2021-06-07","filed_date":"2021-06-08","scope":"insider"},{"id":4514436,"accession":"0001104659-21-071269","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001104659-21-071269","line_url":"/filing/0001104659-21-071269#line-2","is_derivative":false,"issuer_cik":"0001297184","issuer_name":"Amphastar Pharmaceuticals, Inc.","issuer_ticker":"AMPH","issuer_name_source":null,"issuer_url":"/issuer/0001297184","owner_cik":"0001379941","owner_name":"Lee Howard","owner_display_name":"Lee Howard","owner_url":"/insider/0001379941","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":10000.0,"shares_display":"10,000","price_per_share":19.7354,"price_display":"19.74","price_state":"stated","total_value":197354.0,"total_display":"197,354.00","total_whole":"197,354","shares_owned_after":132914.0,"shares_owned_after_display":"132,914","ownership_form":"D","is_10b5_1":null,"transaction_date":"2021-05-20","filed_date":"2021-05-24","scope":"insider"},{"id":3328522,"accession":"0001104659-20-066481","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001104659-20-066481","line_url":"/filing/0001104659-20-066481#line-4","is_derivative":false,"issuer_cik":"0001297184","issuer_name":"Amphastar Pharmaceuticals, Inc.","issuer_ticker":"AMPH","issuer_name_source":null,"issuer_url":"/issuer/0001297184","owner_cik":"0001379941","owner_name":"Lee Howard","owner_display_name":"Lee Howard","owner_url":"/insider/0001379941","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":10000.0,"shares_display":"10,000","price_per_share":18.5989,"price_display":"18.60","price_state":"stated","total_value":185989.0,"total_display":"185,989.00","total_whole":"185,989","shares_owned_after":128081.0,"shares_owned_after_display":"128,081","ownership_form":"D","is_10b5_1":null,"transaction_date":"2020-05-26","filed_date":"2020-05-27","scope":"insider"},{"id":3328518,"accession":"0001104659-20-066481","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001104659-20-066481","line_url":"/filing/0001104659-20-066481#line-2","is_derivative":false,"issuer_cik":"0001297184","issuer_name":"Amphastar Pharmaceuticals, Inc.","issuer_ticker":"AMPH","issuer_name_source":null,"issuer_url":"/issuer/0001297184","owner_cik":"0001379941","owner_name":"Lee Howard","owner_display_name":"Lee Howard","owner_url":"/insider/0001379941","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":10000.0,"shares_display":"10,000","price_per_share":18.3639,"price_display":"18.36","price_state":"stated","total_value":183639.0,"total_display":"183,639.00","total_whole":"183,639","shares_owned_after":128081.0,"shares_owned_after_display":"128,081","ownership_form":"D","is_10b5_1":null,"transaction_date":"2020-05-22","filed_date":"2020-05-27","scope":"insider"},{"id":3080276,"accession":"0001104659-20-065337","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001104659-20-065337","line_url":"/filing/0001104659-20-065337#line-4","is_derivative":false,"issuer_cik":"0001297184","issuer_name":"Amphastar Pharmaceuticals, Inc.","issuer_ticker":"AMPH","issuer_name_source":null,"issuer_url":"/issuer/0001297184","owner_cik":"0001379941","owner_name":"Lee Howard","owner_display_name":"Lee Howard","owner_url":"/insider/0001379941","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":10000.0,"shares_display":"10,000","price_per_share":18.4687,"price_display":"18.47","price_state":"stated","total_value":184687.0,"total_display":"184,687.00","total_whole":"184,687","shares_owned_after":128081.0,"shares_owned_after_display":"128,081","ownership_form":"D","is_10b5_1":null,"transaction_date":"2020-05-21","filed_date":"2020-05-22","scope":"insider"},{"id":3080266,"accession":"0001104659-20-065337","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001104659-20-065337","line_url":"/filing/0001104659-20-065337#line-2","is_derivative":false,"issuer_cik":"0001297184","issuer_name":"Amphastar Pharmaceuticals, Inc.","issuer_ticker":"AMPH","issuer_name_source":null,"issuer_url":"/issuer/0001297184","owner_cik":"0001379941","owner_name":"Lee Howard","owner_display_name":"Lee Howard","owner_url":"/insider/0001379941","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":17782.0,"shares_display":"17,782","price_per_share":18.4332,"price_display":"18.43","price_state":"stated","total_value":327779.1624,"total_display":"327,779.16","total_whole":"327,779","shares_owned_after":128081.0,"shares_owned_after_display":"128,081","ownership_form":"D","is_10b5_1":null,"transaction_date":"2020-05-20","filed_date":"2020-05-22","scope":"insider"},{"id":6778061,"accession":"0001104659-18-071885","txn_seq":8,"anchor":"line-8","filing_url":"/filing/0001104659-18-071885","line_url":"/filing/0001104659-18-071885#line-8","is_derivative":false,"issuer_cik":"0001297184","issuer_name":"Amphastar Pharmaceuticals, Inc.","issuer_ticker":"AMPH","issuer_name_source":null,"issuer_url":"/issuer/0001297184","owner_cik":"0001379941","owner_name":"Lee Howard","owner_display_name":"Lee Howard","owner_url":"/insider/0001379941","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":9278.0,"shares_display":"9,278","price_per_share":21.8866,"price_display":"21.89","price_state":"stated","total_value":203063.8748,"total_display":"203,063.87","total_whole":"203,064","shares_owned_after":123381.0,"shares_owned_after_display":"123,381","ownership_form":"D","is_10b5_1":null,"transaction_date":"2018-12-07","filed_date":"2018-12-07","scope":"insider"},{"id":6778054,"accession":"0001104659-18-071885","txn_seq":6,"anchor":"line-6","filing_url":"/filing/0001104659-18-071885","line_url":"/filing/0001104659-18-071885","is_derivative":false,"issuer_cik":"0001297184","issuer_name":"Amphastar Pharmaceuticals, Inc.","issuer_ticker":"AMPH","issuer_name_source":null,"issuer_url":"/issuer/0001297184","owner_cik":"0001379941","owner_name":"Lee Howard","owner_display_name":"Lee Howard","owner_url":"/insider/0001379941","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":10000.0,"shares_display":"10,000","price_per_share":21.22415068,"price_display":"21.22","price_state":"stated","total_value":212241.5068,"total_display":"212,241.51","total_whole":"212,242","shares_owned_after":123381.0,"shares_owned_after_display":"123,381","ownership_form":"D","is_10b5_1":null,"transaction_date":"2018-12-06","filed_date":"2018-12-07","scope":"insider","n_lines":2},{"id":6778044,"accession":"0001104659-18-071885","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001104659-18-071885","line_url":"/filing/0001104659-18-071885","is_derivative":false,"issuer_cik":"0001297184","issuer_name":"Amphastar Pharmaceuticals, Inc.","issuer_ticker":"AMPH","issuer_name_source":null,"issuer_url":"/issuer/0001297184","owner_cik":"0001379941","owner_name":"Lee Howard","owner_display_name":"Lee Howard","owner_url":"/insider/0001379941","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":10000.0,"shares_display":"10,000","price_per_share":21.91582055,"price_display":"21.92","price_state":"stated","total_value":219158.2055,"total_display":"219,158.21","total_whole":"219,158","shares_owned_after":124392.0,"shares_owned_after_display":"124,392","ownership_form":"D","is_10b5_1":null,"transaction_date":"2018-12-04","filed_date":"2018-12-07","scope":"insider","n_lines":2},{"id":2824243,"accession":"0001104659-16-157606","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001104659-16-157606","line_url":"/filing/0001104659-16-157606#line-4","is_derivative":false,"issuer_cik":"0001297184","issuer_name":"Amphastar Pharmaceuticals, Inc.","issuer_ticker":"AMPH","issuer_name_source":null,"issuer_url":"/issuer/0001297184","owner_cik":"0001379941","owner_name":"Lee Howard","owner_display_name":"Lee Howard","owner_url":"/insider/0001379941","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":17994.0,"shares_display":"17,994","price_per_share":20.7575,"price_display":"20.76","price_state":"stated","total_value":373510.455,"total_display":"373,510.46","total_whole":"373,510","shares_owned_after":114527.0,"shares_owned_after_display":"114,527","ownership_form":"D","is_10b5_1":null,"transaction_date":"2016-11-15","filed_date":"2016-11-16","scope":"insider"},{"id":2824235,"accession":"0001104659-16-157606","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001104659-16-157606","line_url":"/filing/0001104659-16-157606#line-2","is_derivative":false,"issuer_cik":"0001297184","issuer_name":"Amphastar Pharmaceuticals, Inc.","issuer_ticker":"AMPH","issuer_name_source":null,"issuer_url":"/issuer/0001297184","owner_cik":"0001379941","owner_name":"Lee Howard","owner_display_name":"Lee Howard","owner_url":"/insider/0001379941","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":20000.0,"shares_display":"20,000","price_per_share":20.5585,"price_display":"20.56","price_state":"stated","total_value":411170.0,"total_display":"411,170.00","total_whole":"411,170","shares_owned_after":114527.0,"shares_owned_after_display":"114,527","ownership_form":"D","is_10b5_1":null,"transaction_date":"2016-11-14","filed_date":"2016-11-16","scope":"insider"},{"id":2314912,"accession":"0001104659-16-143019","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001104659-16-143019","line_url":"/filing/0001104659-16-143019#line-2","is_derivative":false,"issuer_cik":"0001297184","issuer_name":"Amphastar Pharmaceuticals, Inc.","issuer_ticker":"AMPH","issuer_name_source":null,"issuer_url":"/issuer/0001297184","owner_cik":"0001379941","owner_name":"Lee Howard","owner_display_name":"Lee Howard","owner_url":"/insider/0001379941","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":10381.0,"shares_display":"10,381","price_per_share":18.7763,"price_display":"18.78","price_state":"stated","total_value":194916.7703,"total_display":"194,916.77","total_whole":"194,917","shares_owned_after":114527.0,"shares_owned_after_display":"114,527","ownership_form":"D","is_10b5_1":null,"transaction_date":"2016-09-01","filed_date":"2016-09-02","scope":"insider"},{"id":8837224,"accession":"0000899243-15-010074","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0000899243-15-010074","line_url":"/filing/0000899243-15-010074#line-4","is_derivative":false,"issuer_cik":"0001297184","issuer_name":"Amphastar Pharmaceuticals, Inc.","issuer_ticker":"AMPH","issuer_name_source":null,"issuer_url":"/issuer/0001297184","owner_cik":"0001379941","owner_name":"Lee Howard","owner_display_name":"Lee Howard","owner_url":"/insider/0001379941","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":1926.0,"shares_display":"1,926","price_per_share":14.33,"price_display":"14.33","price_state":"stated","total_value":27599.58,"total_display":"27,599.58","total_whole":"27,600","shares_owned_after":109901.0,"shares_owned_after_display":"109,901","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-12-16","filed_date":"2015-12-17","scope":"insider"},{"id":8837220,"accession":"0000899243-15-010074","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0000899243-15-010074","line_url":"/filing/0000899243-15-010074#line-2","is_derivative":false,"issuer_cik":"0001297184","issuer_name":"Amphastar Pharmaceuticals, Inc.","issuer_ticker":"AMPH","issuer_name_source":null,"issuer_url":"/issuer/0001297184","owner_cik":"0001379941","owner_name":"Lee Howard","owner_display_name":"Lee Howard","owner_url":"/insider/0001379941","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":36536.0,"shares_display":"36,536","price_per_share":14.342,"price_display":"14.34","price_state":"stated","total_value":523999.312,"total_display":"523,999.31","total_whole":"523,999","shares_owned_after":109901.0,"shares_owned_after_display":"109,901","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-12-15","filed_date":"2015-12-17","scope":"insider"},{"id":6571338,"accession":"0001104659-14-063354","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001104659-14-063354","line_url":"/filing/0001104659-14-063354#line-1","is_derivative":false,"issuer_cik":"0001297184","issuer_name":"Amphastar Pharmaceuticals, Inc.","issuer_ticker":"AMPH","issuer_name_source":null,"issuer_url":"/issuer/0001297184","owner_cik":"0001379941","owner_name":"Lee Howard","owner_display_name":"Lee Howard","owner_url":"/insider/0001379941","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":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":6000.0,"shares_display":"6,000","price_per_share":10.837,"price_display":"10.84","price_state":"stated","total_value":65022.0,"total_display":"65,022.00","total_whole":"65,022","shares_owned_after":101215.0,"shares_owned_after_display":"101,215","ownership_form":"D","is_10b5_1":null,"transaction_date":"2014-08-25","filed_date":"2014-08-27","scope":"insider"}],"collapsed":true,"next_cursor":null,"ledger_fault":false,"count":{"value":21,"kind":"exact"},"open_market_only":false,"composition":{"kind":"exact","rows":[{"code":"P","label":"Open-market purchase","n":1,"open_market":true},{"code":"S","label":"Open-market sale","n":20,"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":21},"affiliations":[{"type":"issuer","type_label":"ISSUER","cik":"0001297184","name":"Amphastar Pharmaceuticals, Inc.","url":"/issuer/0001297184","role":"Director","n_filings":12,"first_seen":"2014-08-27","last_seen":"2023-06-05"}],"order_statement":"Newest transaction date first, id breaking the tie.","canonical_url":"https://ebomi.com/insider/0001379941","retrieved_at":"2026-08-25T02:54:39+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"}}