{"entity":{"type":"insider","cik":"0001260288","url":"/insider/0001260288","json_url":"/insider/0001260288.json","name":"BROOKS MICHAEL T","name_source":"as-filed","also_issuer":false,"cross_url":null},"coverage_statement":{"n_transactions":4,"n_filings":4,"first":"2009-12-31","last":"2018-09-10","span_basis":"filed_date"},"name_variants":[{"name":"BROOKS MICHAEL T","source":"filing","n_filings":4,"first_seen":"2009-12-31","last_seen":"2018-09-10"}],"transactions":[{"id":6375400,"accession":"0001228924-18-000027","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001228924-18-000027","line_url":"/filing/0001228924-18-000027#line-1","is_derivative":false,"issuer_cik":"0000724004","issuer_name":"MESA LABORATORIES INC /CO","issuer_ticker":"MLAB","issuer_name_source":null,"issuer_url":"/issuer/0000724004","owner_cik":"0001260288","owner_name":"BROOKS MICHAEL T","owner_display_name":"BROOKS MICHAEL T","owner_url":"/insider/0001260288","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":2700.0,"shares_display":"2,700","price_per_share":195.39,"price_display":"195.39","price_state":"stated","total_value":527553.0,"total_display":"527,553.00","total_whole":"527,553","shares_owned_after":27750.0,"shares_owned_after_display":"27,750","ownership_form":"D","is_10b5_1":null,"transaction_date":"2018-09-10","filed_date":"2018-09-10","scope":"insider"},{"id":5138749,"accession":"0001228924-17-000008","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001228924-17-000008","line_url":"/filing/0001228924-17-000008#line-1","is_derivative":false,"issuer_cik":"0000724004","issuer_name":"MESA LABORATORIES INC /CO","issuer_ticker":"MLAB","issuer_name_source":null,"issuer_url":"/issuer/0000724004","owner_cik":"0001260288","owner_name":"BROOKS MICHAEL T","owner_display_name":"BROOKS MICHAEL T","owner_url":"/insider/0001260288","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":2000.0,"shares_display":"2,000","price_per_share":122.94,"price_display":"122.94","price_state":"stated","total_value":245880.0,"total_display":"245,880.00","total_whole":"245,880","shares_owned_after":28900.0,"shares_owned_after_display":"28,900","ownership_form":"D","is_10b5_1":null,"transaction_date":"2017-03-20","filed_date":"2017-03-21","scope":"insider"},{"id":2427440,"accession":"0001228924-12-000025","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001228924-12-000025","line_url":"/filing/0001228924-12-000025#line-1","is_derivative":false,"issuer_cik":"0000724004","issuer_name":"MESA LABORATORIES INC /CO","issuer_ticker":"MLAB","issuer_name_source":null,"issuer_url":"/issuer/0000724004","owner_cik":"0001260288","owner_name":"BROOKS MICHAEL T","owner_display_name":"BROOKS MICHAEL T","owner_url":"/insider/0001260288","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":4000.0,"shares_display":"4,000","price_per_share":47.1931,"price_display":"47.19","price_state":"stated","total_value":188772.4,"total_display":"188,772.40","total_whole":"188,772","shares_owned_after":19200.0,"shares_owned_after_display":"19,200","ownership_form":"D","is_10b5_1":null,"transaction_date":"2012-12-06","filed_date":"2012-12-10","scope":"insider"},{"id":5614781,"accession":"0001228924-09-000019","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001228924-09-000019","line_url":"/filing/0001228924-09-000019#line-1","is_derivative":false,"issuer_cik":"0000724004","issuer_name":"MESA LABORATORIES INC /CO","issuer_ticker":"MLAB","issuer_name_source":null,"issuer_url":"/issuer/0000724004","owner_cik":"0001260288","owner_name":"BROOKS MICHAEL T","owner_display_name":"BROOKS MICHAEL T","owner_url":"/insider/0001260288","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":"Mesa Laboratories, Inc. 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":23.1,"price_display":"23.10","price_state":"stated","total_value":231000.0,"total_display":"231,000.00","total_whole":"231,000","shares_owned_after":19200.0,"shares_owned_after_display":"19,200","ownership_form":"D","is_10b5_1":null,"transaction_date":"2009-12-30","filed_date":"2009-12-31","scope":"insider"}],"collapsed":true,"next_cursor":null,"ledger_fault":false,"count":{"value":4,"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":4,"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":4},"affiliations":[{"type":"issuer","type_label":"ISSUER","cik":"0000724004","name":"MESA LABORATORIES INC /CO","url":"/issuer/0000724004","role":"Director","n_filings":4,"first_seen":"2009-12-31","last_seen":"2018-09-10"}],"order_statement":"Newest transaction date first, id breaking the tie.","canonical_url":"https://ebomi.com/insider/0001260288","retrieved_at":"2026-08-26T16:40:26+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"}}