UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q/A

(AMENDMENT NO. 1)

(Mark one)

☒     QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2014

☐     TRANSITION REPORT PURSUANT TOSECTION 13 OR 15 (d) OF THE SECURITES EXCHANGE ACT OF 1934

For the transition period from ___ to ___

Commission File No: 0-11740

MESA LABORATORIES, INC.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (303) 987-8000

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934, during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days.

Yes ☒   No ☐

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (Section 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes ☒     No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes ☐     No ☒

Indicate the number of shares outstanding of each of the Issuer’s classes of common stock, as of the latest practicable date:

There were 3,530,938 shares of the Issuer’s common stock, no par value, outstanding as of October 28, 2014.

EXPLANATORY NOTE

Mesa Laboratories, Inc. is filing this Amendment No. 1 (the “Form 10-Q/A”) to our Quarterly Report on Form 10-Q for the quarter ended September 30, 2014 (the “Form 10-Q”), filed with the Securities and Exchange Commission (“SEC”) on November 6, 2014, for the sole purpose of correcting an error in the first paragraph of “Item 4. Controls and Procedures” of the Form 10-Q. Specifically, in the last two sentences of that paragraph, “June 30, 2014” should have been “September 30, 2014,” so that the sentences, as corrected, read: “Our management evaluated, with the participation of our Chief Executive Officer and Chief Financial Officer, the effectiveness of our disclosure controls and procedures as of September 30, 2014. Based on that evaluation, our management concluded that our disclosure controls and procedures were effective at September 30, 2014.”

No other changes have been made to the Form 10-Q. This Form 10-Q/A continues to speak as of the original filing date of the Form 10-Q, does not reflect events that may have occurred subsequent to the original filing date and does not modify or update any related disclosures made in the Form 10-Q.

Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

We maintain disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended) that are designed to reasonably ensure that information required to be disclosed by us in the reports we file or submit under the Securities Exchange Act of 1934, as amended, is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms and that such information is accumulated and communicated to our management, including our principal executive and principal financial officers, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure. Our management evaluated, with the participation of our Chief Executive Officer and Chief Financial Officer, the effectiveness of our disclosure controls and procedures as of September 30, 2014. Based on that evaluation, our management concluded that our disclosure controls and procedures were effective at September 30, 2014.

Our management, including our Chief Executive Officer and Chief Financial Officer, is responsible for establishing and maintaining adequate internal control over financial reporting. Our internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements in accordance with generally accepted accounting principles in the United States. Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Therefore, even those systems determined to be effective can provide only reasonable assurance of achieving their control objectives. Management evaluated the effectiveness of our internal control over financial reporting based on the framework in “Internal Control – Integrated Framework” issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in 1992.

Our management evaluated, with the participation of our Chief Executive Officer and Chief Financial Officer, the effectiveness of our internal control over financial reporting as of September 30, 2014. Based on that evaluation, our management concluded that our internal control over financial reporting was effective at September 30, 2014. As allowed, this evaluation excludes the operations of acquired entities during the six months ended September 30, 2014 due to the timing of the acquisitions. Revenues related to these acquisitions were 10% of total revenues for the six months ended September 30, 2014.

Changes in Internal Control Over Financial Reporting

There were no significant changes in our internal control over financial reporting that occurred during the six months ended September 30, 2014, that have materially affected, or are reasonably likely to materially affect our internal control over financial reporting.

Item 6. Exhibits

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.

Page 3