X0508 4 2025-10-27 0 0000724004 MESA LABORATORIES INC /CO/ MLAB 0001700671 Owens Gary M 12100 W. 6TH AVENUE LAKEWOOD CO 80228 0 1 0 0 President and CEO 0 Common Stock 2025-10-27 4 M 0 11558 0 A 64135 D Shares represent common stock of Mesa Labs release of performance share units that were issued on October 28,2021 as a special grant to encourage continued performance and long-term retention. The PSUs vest 1/3 on October 27, 2024 and each of the next two anniversary dates. John Sakys under Power of Attorney by Gary Owens 2025-10-28