{"entity":{"type":"insider","cik":"0001250730","url":"/insider/0001250730","json_url":"/insider/0001250730.json","name":"SCHAFFER MICHAEL I","name_source":"as-filed","also_issuer":false,"cross_url":null},"coverage_statement":{"n_transactions":13,"n_filings":8,"first":"2015-06-17","last":"2022-12-20","span_basis":"filed_date"},"name_variants":[{"name":"SCHAFFER MICHAEL I","source":"filing","n_filings":8,"first_seen":"2015-06-17","last_seen":"2022-12-20"}],"transactions":[{"id":6512820,"accession":"0001062993-22-024226","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001062993-22-024226","line_url":"/filing/0001062993-22-024226#line-1","is_derivative":false,"issuer_cik":"0000806517","issuer_name":"PSYCHEMEDICS CORP","issuer_ticker":"PMD","issuer_name_source":null,"issuer_url":"/issuer/0000806517","owner_cik":"0001250730","owner_name":"SCHAFFER MICHAEL I","owner_display_name":"SCHAFFER MICHAEL I","owner_url":"/insider/0001250730","role":"Officer (VP of Laboratory Operations)","role_mark":"O","role_mark_label":"Officer (VP of Laboratory Operations)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"VP of Laboratory Operations","security_title":"Common Stock, $.005 Par Value","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":100.0,"shares_display":"100","price_per_share":4.95,"price_display":"4.95","price_state":"stated","total_value":495.0,"total_display":"495.00","total_whole":"495","shares_owned_after":37201.0,"shares_owned_after_display":"37,201","ownership_form":"D","is_10b5_1":null,"transaction_date":"2022-12-16","filed_date":"2022-12-20","scope":"insider"},{"id":3188865,"accession":"0001505148-20-000032","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001505148-20-000032","line_url":"/filing/0001505148-20-000032#line-1","is_derivative":false,"issuer_cik":"0000806517","issuer_name":"PSYCHEMEDICS CORP","issuer_ticker":"PMD","issuer_name_source":null,"issuer_url":"/issuer/0000806517","owner_cik":"0001250730","owner_name":"SCHAFFER MICHAEL I","owner_display_name":"SCHAFFER MICHAEL I","owner_url":"/insider/0001250730","role":"Officer (VP of Laboratory Operations)","role_mark":"O","role_mark_label":"Officer (VP of Laboratory Operations)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"VP of Laboratory Operations","security_title":"Common Stock, $.005 Par Value","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":500.0,"shares_display":"500","price_per_share":4.2,"price_display":"4.20","price_state":"stated","total_value":2100.0,"total_display":"2,100.00","total_whole":"2,100","shares_owned_after":26669.0,"shares_owned_after_display":"26,669","ownership_form":"D","is_10b5_1":null,"transaction_date":"2020-11-18","filed_date":"2020-11-20","scope":"insider"},{"id":8129759,"accession":"0001373894-19-000061","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001373894-19-000061","line_url":"/filing/0001373894-19-000061#line-3","is_derivative":false,"issuer_cik":"0000806517","issuer_name":"PSYCHEMEDICS CORP","issuer_ticker":"PMD","issuer_name_source":null,"issuer_url":"/issuer/0000806517","owner_cik":"0001250730","owner_name":"SCHAFFER MICHAEL I","owner_display_name":"SCHAFFER MICHAEL I","owner_url":"/insider/0001250730","role":"Officer (VP of Laboratory Operations)","role_mark":"O","role_mark_label":"Officer (VP of Laboratory Operations)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"VP of Laboratory Operations","security_title":"Common Stock, $.005 Par Value","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3900.0,"shares_display":"3,900","price_per_share":9.61,"price_display":"9.61","price_state":"stated","total_value":37479.0,"total_display":"37,479.00","total_whole":"37,479","shares_owned_after":19169.0,"shares_owned_after_display":"19,169","ownership_form":"D","is_10b5_1":null,"transaction_date":"2019-06-14","filed_date":"2019-06-14","scope":"insider"},{"id":8129754,"accession":"0001373894-19-000061","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001373894-19-000061","line_url":"/filing/0001373894-19-000061#line-2","is_derivative":false,"issuer_cik":"0000806517","issuer_name":"PSYCHEMEDICS CORP","issuer_ticker":"PMD","issuer_name_source":null,"issuer_url":"/issuer/0000806517","owner_cik":"0001250730","owner_name":"SCHAFFER MICHAEL I","owner_display_name":"SCHAFFER MICHAEL I","owner_url":"/insider/0001250730","role":"Officer (VP of Laboratory Operations)","role_mark":"O","role_mark_label":"Officer (VP of Laboratory Operations)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"VP of Laboratory Operations","security_title":"Common Stock, $.005 Par Value","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2631.0,"shares_display":"2,631","price_per_share":9.82,"price_display":"9.82","price_state":"stated","total_value":25836.42,"total_display":"25,836.42","total_whole":"25,836","shares_owned_after":23069.0,"shares_owned_after_display":"23,069","ownership_form":"D","is_10b5_1":null,"transaction_date":"2019-06-13","filed_date":"2019-06-14","scope":"insider"},{"id":8129748,"accession":"0001373894-19-000061","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001373894-19-000061","line_url":"/filing/0001373894-19-000061#line-1","is_derivative":false,"issuer_cik":"0000806517","issuer_name":"PSYCHEMEDICS CORP","issuer_ticker":"PMD","issuer_name_source":null,"issuer_url":"/issuer/0000806517","owner_cik":"0001250730","owner_name":"SCHAFFER MICHAEL I","owner_display_name":"SCHAFFER MICHAEL I","owner_url":"/insider/0001250730","role":"Officer (VP of Laboratory Operations)","role_mark":"O","role_mark_label":"Officer (VP of Laboratory Operations)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"VP of Laboratory Operations","security_title":"Common Stock, $.005 Par Value","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2800.0,"shares_display":"2,800","price_per_share":9.84,"price_display":"9.84","price_state":"stated","total_value":27552.0,"total_display":"27,552.00","total_whole":"27,552","shares_owned_after":25700.0,"shares_owned_after_display":"25,700","ownership_form":"D","is_10b5_1":null,"transaction_date":"2019-06-12","filed_date":"2019-06-14","scope":"insider"},{"id":6897732,"accession":"0001739481-18-000044","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001739481-18-000044","line_url":"/filing/0001739481-18-000044#line-1","is_derivative":false,"issuer_cik":"0000806517","issuer_name":"PSYCHEMEDICS CORP","issuer_ticker":"PMD","issuer_name_source":null,"issuer_url":"/issuer/0000806517","owner_cik":"0001250730","owner_name":"SCHAFFER MICHAEL I","owner_display_name":"SCHAFFER MICHAEL I","owner_url":"/insider/0001250730","role":"Officer (VP of Laboratory Operations)","role_mark":"O","role_mark_label":"Officer (VP of Laboratory Operations)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"VP of Laboratory Operations","security_title":"Common Stock, $.005 Par Value","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":6324.0,"shares_display":"6,324","price_per_share":19.23,"price_display":"19.23","price_state":"stated","total_value":121610.52,"total_display":"121,610.52","total_whole":"121,611","shares_owned_after":28624.0,"shares_owned_after_display":"28,624","ownership_form":"D","is_10b5_1":null,"transaction_date":"2018-09-06","filed_date":"2018-09-10","scope":"insider"},{"id":4876735,"accession":"0001240679-17-000035","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001240679-17-000035","line_url":"/filing/0001240679-17-000035#line-3","is_derivative":false,"issuer_cik":"0000806517","issuer_name":"PSYCHEMEDICS CORP","issuer_ticker":"PMD","issuer_name_source":null,"issuer_url":"/issuer/0000806517","owner_cik":"0001250730","owner_name":"SCHAFFER MICHAEL I","owner_display_name":"SCHAFFER MICHAEL I","owner_url":"/insider/0001250730","role":"Officer (VP of Laboratory Operations)","role_mark":"O","role_mark_label":"Officer (VP of Laboratory Operations)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"VP of Laboratory Operations","security_title":"Common Stock, $.005 Par Value","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2167.0,"shares_display":"2,167","price_per_share":20.14,"price_display":"20.14","price_state":"stated","total_value":43643.38,"total_display":"43,643.38","total_whole":"43,643","shares_owned_after":34706.0,"shares_owned_after_display":"34,706","ownership_form":"D","is_10b5_1":null,"transaction_date":"2017-09-06","filed_date":"2017-09-06","scope":"insider"},{"id":4876731,"accession":"0001240679-17-000035","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001240679-17-000035","line_url":"/filing/0001240679-17-000035#line-2","is_derivative":false,"issuer_cik":"0000806517","issuer_name":"PSYCHEMEDICS CORP","issuer_ticker":"PMD","issuer_name_source":null,"issuer_url":"/issuer/0000806517","owner_cik":"0001250730","owner_name":"SCHAFFER MICHAEL I","owner_display_name":"SCHAFFER MICHAEL I","owner_url":"/insider/0001250730","role":"Officer (VP of Laboratory Operations)","role_mark":"O","role_mark_label":"Officer (VP of Laboratory Operations)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"VP of Laboratory Operations","security_title":"Common Stock, $.005 Par Value","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":4400.0,"shares_display":"4,400","price_per_share":20.37,"price_display":"20.37","price_state":"stated","total_value":89628.0,"total_display":"89,628.00","total_whole":"89,628","shares_owned_after":36873.0,"shares_owned_after_display":"36,873","ownership_form":"D","is_10b5_1":null,"transaction_date":"2017-09-05","filed_date":"2017-09-06","scope":"insider"},{"id":4876727,"accession":"0001240679-17-000035","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001240679-17-000035","line_url":"/filing/0001240679-17-000035#line-1","is_derivative":false,"issuer_cik":"0000806517","issuer_name":"PSYCHEMEDICS CORP","issuer_ticker":"PMD","issuer_name_source":null,"issuer_url":"/issuer/0000806517","owner_cik":"0001250730","owner_name":"SCHAFFER MICHAEL I","owner_display_name":"SCHAFFER MICHAEL I","owner_url":"/insider/0001250730","role":"Officer (VP of Laboratory Operations)","role_mark":"O","role_mark_label":"Officer (VP of Laboratory Operations)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"VP of Laboratory Operations","security_title":"Common Stock, $.005 Par Value","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":981.0,"shares_display":"981","price_per_share":21.16,"price_display":"21.16","price_state":"stated","total_value":20757.96,"total_display":"20,757.96","total_whole":"20,758","shares_owned_after":41273.0,"shares_owned_after_display":"41,273","ownership_form":"D","is_10b5_1":null,"transaction_date":"2017-09-01","filed_date":"2017-09-06","scope":"insider"},{"id":5296031,"accession":"0001505148-17-000021","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001505148-17-000021","line_url":"/filing/0001505148-17-000021#line-1","is_derivative":false,"issuer_cik":"0000806517","issuer_name":"PSYCHEMEDICS CORP","issuer_ticker":"PMD","issuer_name_source":null,"issuer_url":"/issuer/0000806517","owner_cik":"0001250730","owner_name":"SCHAFFER MICHAEL I","owner_display_name":"SCHAFFER MICHAEL I","owner_url":"/insider/0001250730","role":"Officer (VP of Laboratory Operations)","role_mark":"O","role_mark_label":"Officer (VP of Laboratory Operations)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"VP of Laboratory Operations","security_title":"Common Stock, $.005 Par Value","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3000.0,"shares_display":"3,000","price_per_share":20.43,"price_display":"20.43","price_state":"stated","total_value":61290.0,"total_display":"61,290.00","total_whole":"61,290","shares_owned_after":42447.0,"shares_owned_after_display":"42,447","ownership_form":"D","is_10b5_1":null,"transaction_date":"2017-05-10","filed_date":"2017-05-15","scope":"insider"},{"id":2164134,"accession":"0001041889-16-000030","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001041889-16-000030","line_url":"/filing/0001041889-16-000030#line-1","is_derivative":false,"issuer_cik":"0000806517","issuer_name":"PSYCHEMEDICS CORP","issuer_ticker":"PMD","issuer_name_source":null,"issuer_url":"/issuer/0000806517","owner_cik":"0001250730","owner_name":"SCHAFFER MICHAEL I","owner_display_name":"SCHAFFER MICHAEL I","owner_url":"/insider/0001250730","role":"Officer (VP of Laboratory Operations)","role_mark":"O","role_mark_label":"Officer (VP of Laboratory Operations)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"VP of Laboratory Operations","security_title":"Common Stock, $.005 Par Value","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":4507.0,"shares_display":"4,507","price_per_share":11.09,"price_display":"11.09","price_state":"stated","total_value":49982.63,"total_display":"49,982.63","total_whole":"49,983","shares_owned_after":46472.0,"shares_owned_after_display":"46,472","ownership_form":"D","is_10b5_1":null,"transaction_date":"2016-02-16","filed_date":"2016-02-16","scope":"insider"},{"id":8198218,"accession":"0001041889-15-000020","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001041889-15-000020","line_url":"/filing/0001041889-15-000020#line-2","is_derivative":false,"issuer_cik":"0000806517","issuer_name":"PSYCHEMEDICS CORP","issuer_ticker":"PMD","issuer_name_source":null,"issuer_url":"/issuer/0000806517","owner_cik":"0001250730","owner_name":"SCHAFFER MICHAEL I","owner_display_name":"SCHAFFER MICHAEL I","owner_url":"/insider/0001250730","role":"Officer (VP of Laboratory Operations)","role_mark":"O","role_mark_label":"Officer (VP of Laboratory Operations)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"VP of Laboratory Operations","security_title":"Common Stock, $.005 Par Value","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1236.0,"shares_display":"1,236","price_per_share":14.65,"price_display":"14.65","price_state":"stated","total_value":18107.4,"total_display":"18,107.40","total_whole":"18,107","shares_owned_after":41965.0,"shares_owned_after_display":"41,965","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-06-16","filed_date":"2015-06-17","scope":"insider"},{"id":8198214,"accession":"0001041889-15-000020","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001041889-15-000020","line_url":"/filing/0001041889-15-000020#line-1","is_derivative":false,"issuer_cik":"0000806517","issuer_name":"PSYCHEMEDICS CORP","issuer_ticker":"PMD","issuer_name_source":null,"issuer_url":"/issuer/0000806517","owner_cik":"0001250730","owner_name":"SCHAFFER MICHAEL I","owner_display_name":"SCHAFFER MICHAEL I","owner_url":"/insider/0001250730","role":"Officer (VP of Laboratory Operations)","role_mark":"O","role_mark_label":"Officer (VP of Laboratory Operations)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"VP of Laboratory Operations","security_title":"Common Stock, $.005 Par Value","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1601.0,"shares_display":"1,601","price_per_share":14.605,"price_display":"14.60","price_state":"stated","total_value":23382.605,"total_display":"23,382.60","total_whole":"23,383","shares_owned_after":43201.0,"shares_owned_after_display":"43,201","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-06-15","filed_date":"2015-06-17","scope":"insider"}],"collapsed":true,"next_cursor":null,"ledger_fault":false,"count":{"value":13,"kind":"exact"},"open_market_only":false,"composition":{"kind":"exact","rows":[{"code":"P","label":"Open-market purchase","n":3,"open_market":true},{"code":"S","label":"Open-market sale","n":10,"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":13},"affiliations":[{"type":"issuer","type_label":"ISSUER","cik":"0000806517","name":"PSYCHEMEDICS CORP","url":"/issuer/0000806517","role":"Officer (VP of Laboratory Operations)","n_filings":8,"first_seen":"2015-06-17","last_seen":"2022-12-20"}],"order_statement":"Newest transaction date first, id breaking the tie.","canonical_url":"https://ebomi.com/insider/0001250730","retrieved_at":"2026-08-22T14:01:24+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"}}