{"transactions":[{"id":729828,"issuer":{"id":5221,"kind":"organization","name":"MESA LABORATORIES INC /CO/","symbol":"MLAB"},"owners":[{"id":36156,"kind":"person","name":"Crennen Lyndsey Elizabeth","position":1,"cik":"0002140665","reported_name":"Crennen Lyndsey Elizabeth","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CAO"}}],"security":"Restricted Stock Units - 3","published_at":"2026-06-23T17:34:00.000Z","date":"2026-06-18","kind":"exercise","planned":false,"acquired":false,"shares":368,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each RSU represents a contingent right to receive one share of the Issuer's common stock"},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"RSUs that vest 1/3 on June 19, 2025 and each of the next 2 anniversary dates"},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Not Applicable"}],"balance_after":367,"derivative":{"exercise_date":"2025-06-19","underlying":"Common Stock","underlying_shares":368},"source":{"system":"sec-edgar","filing":"0000724004-26-000065","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/724004/000072400426000065/primary_doc.xml","form_type":"4"}},{"id":729827,"issuer":{"id":5221,"kind":"organization","name":"MESA LABORATORIES INC /CO/","symbol":"MLAB"},"owners":[{"id":36156,"kind":"person","name":"Crennen Lyndsey Elizabeth","position":1,"cik":"0002140665","reported_name":"Crennen Lyndsey Elizabeth","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CAO"}}],"security":"Restricted Stock Units - 2","published_at":"2026-06-23T17:34:00.000Z","date":"2026-06-18","kind":"exercise","planned":false,"acquired":false,"shares":233,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each RSU represents a contingent right to receive one share of the Issuer's common stock"},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"RSUs that vest 1/3 on June 18, 2025 and each of the next two anniversary dates"},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Not Applicable"}],"balance_after":232,"derivative":{"exercise_date":"2025-06-18","underlying":"Common Stock","underlying_shares":233},"source":{"system":"sec-edgar","filing":"0000724004-26-000065","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/724004/000072400426000065/primary_doc.xml","form_type":"4"}},{"id":729826,"issuer":{"id":5221,"kind":"organization","name":"MESA LABORATORIES INC /CO/","symbol":"MLAB"},"owners":[{"id":36156,"kind":"person","name":"Crennen Lyndsey Elizabeth","position":1,"cik":"0002140665","reported_name":"Crennen Lyndsey Elizabeth","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CAO"}}],"security":"Restricted Stock Unit - 1","published_at":"2026-06-23T17:34:00.000Z","date":"2026-06-18","kind":"exercise","planned":false,"acquired":false,"shares":125,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each RSU represents a contingent right to receive one share of the Issuer's common stock"},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"RSUs that vested 1/3 on June 21, 2024 and each of the next two anniversary dates"},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Not Applicable"}],"balance_after":0,"derivative":{"exercise_date":"2024-06-21","underlying":"Common Stock","underlying_shares":125},"source":{"system":"sec-edgar","filing":"0000724004-26-000065","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/724004/000072400426000065/primary_doc.xml","form_type":"4"}},{"id":729825,"issuer":{"id":5221,"kind":"organization","name":"MESA LABORATORIES INC /CO/","symbol":"MLAB"},"owners":[{"id":36156,"kind":"person","name":"Crennen Lyndsey Elizabeth","position":1,"cik":"0002140665","reported_name":"Crennen Lyndsey Elizabeth","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CAO"}}],"security":"Common Stock","published_at":"2026-06-23T17:34:00.000Z","date":"2026-06-22","kind":"sale","planned":false,"acquired":false,"shares":442,"price":89.502,"value":39559.884,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F7","text":"Shares sold to cover taxes related to the vesting of RSUs and PSUs on June 18, 2026.  Transaction was executed under a 10b-1 plan."}],"balance_after":2020,"source":{"system":"sec-edgar","filing":"0000724004-26-000065","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/724004/000072400426000065/primary_doc.xml","form_type":"4"}},{"id":729824,"issuer":{"id":5221,"kind":"organization","name":"MESA LABORATORIES INC /CO/","symbol":"MLAB"},"owners":[{"id":36156,"kind":"person","name":"Crennen Lyndsey Elizabeth","position":1,"cik":"0002140665","reported_name":"Crennen Lyndsey Elizabeth","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CAO"}}],"security":"Common Stock","published_at":"2026-06-23T17:34:00.000Z","date":"2026-06-18","kind":"grant","planned":false,"acquired":true,"shares":263,"price":95.1,"value":25011.3,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F6","text":"Shares represent common stock of Mesa Labs issued upon release of performance share units issued under the FY24-FY26 performance share unit program"}],"balance_after":2462,"source":{"system":"sec-edgar","filing":"0000724004-26-000065","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/724004/000072400426000065/primary_doc.xml","form_type":"4"}},{"id":729823,"issuer":{"id":5221,"kind":"organization","name":"MESA LABORATORIES INC /CO/","symbol":"MLAB"},"owners":[{"id":36156,"kind":"person","name":"Crennen Lyndsey Elizabeth","position":1,"cik":"0002140665","reported_name":"Crennen Lyndsey Elizabeth","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CAO"}}],"security":"Common Stock","published_at":"2026-06-23T17:34:00.000Z","date":"2026-06-18","kind":"exercise","planned":false,"acquired":true,"shares":368,"price":95.1,"value":34996.8,"ownership":{"direct":true},"balance_after":2199,"source":{"system":"sec-edgar","filing":"0000724004-26-000065","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/724004/000072400426000065/primary_doc.xml","form_type":"4"}},{"id":729822,"issuer":{"id":5221,"kind":"organization","name":"MESA LABORATORIES INC /CO/","symbol":"MLAB"},"owners":[{"id":36156,"kind":"person","name":"Crennen Lyndsey Elizabeth","position":1,"cik":"0002140665","reported_name":"Crennen Lyndsey Elizabeth","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CAO"}}],"security":"Common Stock","published_at":"2026-06-23T17:34:00.000Z","date":"2026-06-18","kind":"exercise","planned":false,"acquired":true,"shares":233,"price":95.1,"value":22158.3,"ownership":{"direct":true},"balance_after":1831,"source":{"system":"sec-edgar","filing":"0000724004-26-000065","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/724004/000072400426000065/primary_doc.xml","form_type":"4"}},{"id":729821,"issuer":{"id":5221,"kind":"organization","name":"MESA LABORATORIES INC /CO/","symbol":"MLAB"},"owners":[{"id":36156,"kind":"person","name":"Crennen Lyndsey Elizabeth","position":1,"cik":"0002140665","reported_name":"Crennen Lyndsey Elizabeth","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CAO"}}],"security":"Common Stock","published_at":"2026-06-23T17:34:00.000Z","date":"2026-06-18","kind":"exercise","planned":false,"acquired":true,"shares":125,"price":95.1,"value":11887.5,"ownership":{"direct":true},"balance_after":1598,"source":{"system":"sec-edgar","filing":"0000724004-26-000065","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/724004/000072400426000065/primary_doc.xml","form_type":"4"}},{"id":735298,"issuer":{"id":5221,"kind":"organization","name":"MESA LABORATORIES INC /CO/","symbol":"MLAB"},"owners":[{"id":36156,"kind":"person","name":"Crennen Lyndsey Elizabeth","position":1,"cik":"0002140665","reported_name":"Crennen Lyndsey Elizabeth","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CAO"}}],"security":"Common Stock","published_at":"2026-06-17T16:19:18.000Z","date":"2026-06-16","kind":"sale","planned":true,"acquired":false,"shares":118,"price":101.267,"value":11949.506,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares sold to cover taxes due on RSU which vested on June 15, 2026"}],"balance_after":1473,"source":{"system":"sec-edgar","filing":"0000724004-26-000061","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/724004/000072400426000061/primary_doc.xml","form_type":"4"}}]}