Initial Statement of Beneficial Ownership (Form 3)

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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(Print or Type Responses)

1. Name and Address of Reporting Person * Crennen Lyndsey Elizabeth 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] (Last) (First) (Middle) 2850 S CLARKSON CIRCLE 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chief Accounting Officer 5. If Amendment, Date Original Filed (Month/Day/Year) (Street) ENGLEWOOD, CO 80113 6. Individual or Joint/Group Filing (Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned

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

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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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 of Derivative Security: 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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Crennen Lyndsey Elizabeth 2850 S CLARKSON CIRCLE ENGLEWOOD, CO 80113			Chief Accounting Officer

Signatures

John Sakys under Power of Attorney by Lyndsey Crennen		06/16/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(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

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