Mesa Laboratories Inc

MLAB

Exchange: Nasdaq
Industry: Industrial Instruments For Measurement, Display, and Control
SEC CIK: 0000724004

SEC filings (opens in a new tab)

In the last 90 days, Mesa Laboratories Inc insiders filed 2 open-market purchases and 1 sale; 159 institutions reported holding it in 13F filings for Q2 2026, worth $500.8M in total; no superinvestor holds it.

Q1 2026 vs. Q4 2025

How the institutions holding Mesa Laboratories Inc changed between Q4 2025 and Q1 2026.

All holders in Q1 2026 All holders in Q4 2025

13F holders of MLAB: Q4 2025 compared with Q1 2026
Measure	Q4 2025	Of which not filed for Q1 2026	Q1 2026	Change
Holders	159	4	161	+6
Shares	4.74M	322.3K	4.83M	+405.3K (+9.2%)
Value	$372.5M	$25.3M	$426.6M	+$79.4M (+22.9%)

4 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so the changes leave them out.

New holders (26)

Institutions that held Mesa Laboratories Inc at the end of Q1 2026 but not at the end of Q4 2025.

Institutions new to MLAB in Q1 2026
Institution	Shares	Value	% of portfolio
Vanguard Capital Management LLC	232,643	$20.6M	0.00%
Vanguard Portfolio Management LLC	52,586	$4.65M	0.00%
Wasatch Advisors Inc	51,233	$4.53M	0.03%
Vanguard Fiduciary Trust Co	38,337	$3.39M	0.00%
Lazard Asset Management LLC	20,328	$1.80M	0.00%
CenterBook Partners LP	14,194	$1.26M	0.07%
Globeflex Capital L P	10,838	$958.3K	0.15%
Ieq Capital, LLC	9,658	$854.0K	0.00%
Vident Advisory, LLC	7,608	$672.7K	0.01%
Y-Intercept (Hong Kong) Ltd	6,315	$558.4K	0.01%
Inceptionr LLC	4,078	$360.6K	0.09%
Wealth Enhancement Advisory Services, LLC	3,224	$293.6K	0.00%
Mercer Global Advisors Inc	3,100	$274.1K	0.00%
Captrust Financial Advisors	2,361	$208.7K	0.00%
Vanguard Global Advisers, LLC	1,992	$176.1K	0.00%
Millstone Evans Group, LLC	120	$10.6K	0.01%
Steward Partners Investment Advisory, LLC	117	$10.3K	0.00%
Root Financial Partners, LLC	74	$6.54K	0.00%
Optiver Holding B.V.	32	$2.83K	0.00%
Parallel Advisors, LLC	27	$2.39K	0.00%
Wealth Preservation Advisors, LLC	25	$2.21K	0.00%
Basecamp Wealth Advisors LLC	5	$442	0.00%
Caitong International Asset Management Co., Ltd	4	$354	0.00%
Fifth Third Bancorp	4	$336	0.00%
JPL Wealth Management, LLC	2	$177	0.00%
Transamerica Financial Advisors, Inc.	1	$88	0.00%

Sold out (20)

Institutions that held Mesa Laboratories Inc at the end of Q4 2025 and filed for Q1 2026 without it.

Institutions that sold out of MLAB in Q1 2026
Institution	Shares, Q4 2025	Value, Q4 2025
Geneva Capital Management LLC	178,713	$14.0M
Mason Capital Management LLC	70,300	$5.52M
Jane Street Group, LLC	56,371	$4.43M
Qube Research & Technologies Ltd	28,130	$2.21M
Irenic Capital Management LP	25,000	$1.96M
Gsa Capital Partners LLP	11,614	$912.0K
Marshall Wace, LLP	7,137	$560.3K
ExodusPoint Capital Management, LP	6,937	$544.6K
Arrowstreet Capital, Limited Partnership	6,228	$488.9K
Dynamic Technology Lab Private Ltd	6,190	$486.0K
Millennium Management LLC	4,465	$350.5K
Aquatic Capital Management LLC	4,446	$349.0K
Balyasny Asset Management LLC	3,792	$297.7K
Quest Partners LLC	2,116	$166.1K
Kestra Advisory Services, LLC	700	$55.0K
Amalgamated Bank	165	$13.0K
SageView Advisory Group, LLC	30	$2.35K
Tucker Asset Management LLC	3	$236
Clearstead Advisors, LLC	1	$79
Hughes Financial Services, LLC	1	$79

Not filed for Q1 2026 yet (4)

Institutions that held Mesa Laboratories Inc at the end of Q4 2025 and haven't filed a 13F for Q1 2026. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding MLAB in Q4 2025 that haven't filed for Q1 2026
Institution	Shares, Q4 2025	Value, Q4 2025
Vanguard Group Inc	321,899	$25.3M
Global Retirement Partners, LLC	359	$28.2K
Comerica Bank	81	$6.41K
CIBC Private Wealth Group, LLC	1	$79