| FORM 3 | UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940 |
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1. Name and Address of Reporting Person*
(Street)
(Country) | 2. Date of Event Requiring Statement
(Month/Day/Year) 06/15/2026 | 3. Issuer Name and Ticker or Trading Symbol
MESA LABORATORIES INC /CO/ [ MLAB ] | |||||||||||||||
| 3a. Foreign Trading Symbol
| 5. If Amendment, Date of Original Filed
(Month/Day/Year) | ||||||||||||||||
| 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
| 6. Individual or Joint/Group Filing (Check Applicable Line)
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| Table I - Non-Derivative Securities Beneficially Owned | |||
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| 1. Title of Security (Instr. 4) | 2. Amount of Securities Beneficially Owned (Instr. 4) | 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) | 4. Nature of Indirect Beneficial Ownership (Instr. 5) |
| Common Stock | 1,863 | D | |
| Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities) | |||||||
|---|---|---|---|---|---|---|---|
| 1. Title of Derivative Security (Instr. 4) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) | 4. Conversion or Exercise Price of Derivative Security | 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) | 6. Nature of Indirect Beneficial Ownership (Instr. 5) | ||
| Date Exercisable | Expiration Date | Title | Amount or Number of Shares | ||||
| Restricted Stock Unit - 1(3) | 06/21/2026(1) | (2) | Common Stock | 125 | $0 | D | |
| Restricted Stock Unit - 2(3) | 06/18/2026(4) | (2) | Common Stock | 465 | $0 | D | |
| Restricted Stock Units - 3(3) | 06/19/2026(5) | (2) | Common Stock | 735 | $0 | D | |
| Restricted Stock Units(3) | 06/13/2027(6) | (2) | Common Stock | 542 | $0 | D | |
| Restricted Stock Units - 5 | 03/02/2027(7) | (2) | Common Stock | 1,800 | $0 | D | |
| Restricted Stock Units 6(3) | 06/15/2027(8) | (2) | Common Stock | 1,443 | $0 | D | |
| NSO -1 | 09/01/2022(9) | 09/01/2027 | Common Stock | 369 | $268.85 | D | |
| NSO - 2 | 06/15/2025(10) | 06/15/2028 | Common Stock | 488 | $185.57 | D | |
| NSO - 3 | 06/21/2024(11) | 06/21/2029 | Common Stock | 646 | $131.67 | D | |
| Explanation of Responses: |
| 1. Last tranche of the grant vests on June 21, 2026 |
| 2. Not Applicable |
| 3. Each RSU represents a contingent right to receive one share of the Issuer's common stock |
| 4. RSUs that vest 233 shares on June 18, 2026 and 232 shares that vest on June 18, 2027 |
| 5. RSUs that vest 368 shares on June 19, 2026 and 367 shares that vest on June 19, 2027 |
| 6. RSUs that vest 271 shares on June 13, 2027 and 271 shares on June 13, 2028 |
| 7. RSUs that vest 612 shares on March 2, 2027 and 594 shares that vest on each of March 2, 2028 and March 2, 2029 |
| 8. RSUs that vest 34% on June 15, 2027, 33% on June 8, 2028 and 33% on June 8, 2029 |
| 9. Non qualified stock options that were fully vested as of June 15, 2024 |
| 10. Non qualified stock options that were fully vested as of June 15, 2025 |
| 11. NSO's that will fully vest on June 21, 2026 |
| John Sakys under Power of Attorney by Lyndsey Crennen | 06/16/2026 | |
| ** Signature of Reporting Person | Date | |
| Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. | ||
| * If the form is filed by more than one reporting person, see Instruction 5 (b)(v). | ||
| ** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a). | ||
| Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure. | ||
| Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number. | ||
| * Form 3: SEC 1473 (03-26) | ||