MESA LABORATORIES INC /CO/ 10-Q

Item 5. Other Information During the three months ended December 31, 2025 , none of our directors or officers entered into new or amended written plans for the purchase or sale of our securities intended to satisfy the affirmative defense conditions of Exchange Act Rule 10b5 - 1 (c). Page 23 Table of Contents Item 6. Exhibits Exhibit No. Description of Exhibit 3.1 Amended and Restated Articles of Incorporation of Mesa Laboratories, Inc. (incorporated by reference from Exhibit 3.1 to the Company's Current Report on Form 8-K filed August 25, 2023). 3.2 Amended and Restated Bylaws of Mesa Laboratories, Inc. (incorporated by reference from Exhibit 3.1 to the Company's Current Report on Form 8-K filed May 10, 2019). 10.1 Amended and Restated Credit Agreement, dated as of April 5, 2024, by and among the Company, the guarantors and lenders party thereto, JPMorgan Chase Bank, N.A., as administrative agent, and the joint lead arrangers and joint bookrunners party thereto (incorporated by reference from Exhibit 10.1 to the Company's Quarterly Report on Form 10-Q filed November 6, 2025.) 10.2.3 Mesa Laboratories, Inc Amended and Restated 2021 Equity Incentive Plan (incorporated by reference from Exhibit 10.2.3 to the Company's Quarterly Report on Form 10-Q filed November 6, 2025). 31.1+ Certification of Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 31.2+ Certification of Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 32.1* Certification of Chief Executive Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 32.2* Certification of Chief Financial Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 101.INS+ XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document. 101.SCH+ Inline XBRL Taxonomy Extension Schema Document. 101.CAL+ Inline XBRL Taxonomy Extension Calculation Linkbase Document 101.DEF+ Inline XBRL Taxonomy Extension Definitions Linkbase Document 101.LAB+ Inline XBRL Taxonomy Extension Label Linkbase Document 101.PRE+ Inline XBRL Taxonomy Extension Presentation Linkbase Document 104+ Cover Page Interactive Data File (formatted as Inline XBRL with applicable taxonomy extension information contained in Exhibits 101.*). + Filed herewith * Furnished herewith Page 24 Table of Contents Signatures Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. MESA LABORATORIES, INC. (Registrant) DATED: February 3, 2026 BY: /s/ Gary M. Owens . Gary M. Owens Chief Executive Officer DATED: February 3, 2026 BY: /s/ John V. Sakys John V. Sakys Chief Financial Officer Page 25