MLAB Insider Trading

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Insider Trading History
Frequently Asked Questions
About

Insider Ownership Percentage: 4.90%

Insider Buying (Last 12 Months): $0.00

Insider Selling (Last 12 Months): $2,898,617.36

Mesa Laboratories Insider Trading History Chart

Mesa Laboratories Share Price & Price History

^$77.15

▲ +0.77 (1.01%)

As of 12/4/2025 05:00 PM ET

Days: 30 | 90 | 365

Mesa Laboratories Insider Trading History

Transaction Date	Insider Name	Title	Buy/Sell	Number of Shares	Average Share Price	Total Transaction	Shares Held After Transaction
6/16/2025	Brian David Archbold	SVP	Sell	472	$97.12	$45,840.64	558
6/16/2025	Gary M. Owens	CEO	Sell	1,939	$97.12	$188,315.68	45,824
6/16/2025	John Sakys	CFO	Sell	642	$97.12	$62,351.04	12,865
3/19/2025	Gary M. Owens	CEO	Sell	21,000	$123.91	$2,602,110.00	43,337
10/28/2024	Gary M. Owens	CEO	Sell	2,518	$113.62	$286,095.16	45,888
9/13/2024	Brian David Archbold	SVP	Sell	1,499	$125.00	$187,375.00
12/15/2023	Brian David Archbold	SVP	Sell	1,500	$112.36	$168,540.00	558
9/15/2023	John Bradley Schmieder	Director	Sell	1,000	$123.74	$123,740.00	62,760
9/13/2023	John Bradley Schmieder	Director	Sell	3,000	$123.32	$369,960.00	66,760
9/1/2023	Gary M. Owens	CEO	Sell	2,000	$142.82	$285,640.00	30,032
3/24/2023	John Sakys	CFO	Sell	2,128	$167.01	$355,397.28	9,696
3/22/2023	John Sakys	CFO	Sell	2,500	$171.62	$429,050.00	9,696
3/15/2023	John Sakys	CFO	Sell	1,000	$165.71	$165,710.00	9,696
3/9/2023	John Sakys	CFO	Sell	400	$169.97	$67,988.00	9,696
2/9/2023	John Sakys	CFO	Sell	1,000	$184.27	$184,270.00	9,696
1/23/2023	John Sakys	CFO	Sell	2,100	$210.19	$441,399.00	9,696
1/13/2023	John Bradley Schmieder	Director	Sell	1,571	$191.31	$300,548.01	68,976
12/8/2022	Shannon Hall	Director	Sell	230	$174.97	$40,243.10	957

SEC Filings (Institutional Ownership Changes) for Mesa Laboratories (NASDAQ:MLAB)

90.60% of Mesa Laboratories stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

Mesa Laboratories Institutional Trading History

Reporting Date	Hedge Fund	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
11/17/2025	Jacobs Levy Equity Management Inc.	3,857	$0.26M	0.0%	N/A	0.070%
11/17/2025	Susquehanna International Group LLP	4,193	$0.28M	0.0%	-61.7%	0.076%
11/17/2025	Qube Research & Technologies Ltd	30,725	$2.06M	0.0%	+54.4%	0.556%
11/17/2025	Numerai GP LLC	3,610	$0.24M	0.0%	N/A	0.065%
11/17/2025	Mason Capital Management LLC	70,300	$4.71M	1.0%	N/A	1.273%
11/17/2025	Millennium Management LLC	133,817	$8.97M	0.0%	+131.9%	2.423%
11/17/2025	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	2,476	$0.17M	0.0%	-12.8%	0.045%
11/17/2025	Citadel Advisors LLC	34,178	$2.29M	0.0%	+27.2%	0.619%
11/17/2025	Brevan Howard Capital Management LP	5,977	$0.40M	0.0%	+160.0%	0.108%
11/17/2025	Crawford Investment Counsel Inc.	82,467	$5.53M	0.1%	+59.4%	1.493%
11/17/2025	Bank of America Corp DE	47,099	$3.16M	0.0%	-27.5%	0.853%
11/17/2025	Aquatic Capital Management LLC	3,610	$0.24M	0.0%	+452.0%	0.065%
11/17/2025	Alliancebernstein L.P.	5,424	$0.36M	0.0%	-4.2%	0.098%
11/17/2025	Ameriprise Financial Inc.	39,095	$2.62M	0.0%	-46.8%	0.708%
11/14/2025	Creative Planning	8,732	$0.59M	0.0%	+37.4%	0.159%
11/14/2025	Raymond James Financial Inc.	47,402	$3.18M	0.0%	-74.5%	0.862%
11/14/2025	Brooklyn Investment Group	4,710	$0.32M	0.0%	+4,806.3%	0.086%
11/14/2025	Two Sigma Investments LP	9,623	$0.65M	0.0%	N/A	0.175%
11/14/2025	Comerica Bank	42,388	$2.84M	0.0%	-4.2%	0.770%
11/14/2025	Simcoe Capital Management LLC	190,929	$12.79M	1.9%	N/A	3.470%
11/14/2025	Glenmede Investment Management LP	3,010	$0.20M	0.0%	-97.9%	0.055%
11/13/2025	Boston Partners	114,357	$7.66M	0.0%	+2,009.5%	2.078%
11/13/2025	Kennedy Capital Management LLC	121,546	$8.15M	0.2%	+34.3%	2.209%
11/13/2025	Sei Investments Co.	5,525	$0.37M	0.0%	+26.7%	0.100%
11/13/2025	UBS Group AG	19,161	$1.28M	0.0%	-38.8%	0.348%
11/13/2025	Geneva Capital Management LLC	191,386	$12.83M	0.2%	-3.9%	3.478%
11/13/2025	BNP Paribas Financial Markets	1,029	$69K	0.0%	+30.9%	0.019%
11/13/2025	Legal & General Group Plc	574	$38K	0.0%	-96.1%	0.010%
11/13/2025	Russell Investments Group Ltd.	99,187	$6.65M	0.0%	-97.7%	1.803%
11/12/2025	Gabelli Funds LLC	53,974	$3.62M	0.0%	+114.6%	0.981%
11/12/2025	Gamco Investors INC. ET AL	8,212	$0.55M	0.0%	+109.0%	0.149%
11/12/2025	Dimensional Fund Advisors LP	116,772	$7.82M	0.0%	+1.3%	2.122%
11/12/2025	Victory Capital Management Inc.	10,455	$0.70M	0.0%	+448.0%	0.190%
11/12/2025	Roubaix Capital LLC	76,657	$5.14M	2.4%	N/A	1.393%
11/12/2025	Royce & Associates LP	148,558	$9.96M	0.1%	-40.0%	2.700%
11/12/2025	Quantbot Technologies LP	2,662	$0.18M	0.0%	N/A	0.048%
11/12/2025	US Bancorp DE	702	$47K	0.0%	-42.2%	0.013%
11/7/2025	GSA Capital Partners LLP	10,768	$0.72M	0.1%	+70.6%	0.196%
11/7/2025	Vanguard Group Inc.	321,717	$21.56M	0.0%	-17.4%	5.847%
11/7/2025	JPMorgan Chase & Co.	4,321	$0.29M	0.0%	-14.2%	0.079%
11/7/2025	Herald Investment Management Ltd	50,000	$3.34M	0.4%	+300.0%	0.909%
11/6/2025	Rhumbline Advisers	7,540	$0.51M	0.0%	-41.1%	0.137%
11/5/2025	Diamond Hill Capital Management Inc.	123,381	$8.27M	0.0%	+218.0%	2.242%
11/5/2025	Smartleaf Asset Management LLC	1,299	$83K	0.0%	-23.5%	0.024%
11/5/2025	Ranger Investment Management L.P.	209,700	$14.05M	1.0%	-2.1%	3.811%
11/5/2025	Envestnet Asset Management Inc.	16,682	$1.12M	0.0%	-18.6%	0.303%
11/4/2025	Principal Financial Group Inc.	10,065	$0.67M	0.0%	-66.2%	0.183%
10/24/2025	Conestoga Capital Advisors LLC	426,457	$28.58M	0.5%	-24.7%	7.754%
10/16/2025	Rice Hall James & Associates LLC	17,145	$1.15M	0.1%	-32.4%	0.312%
10/15/2025	CWM LLC	597	$40K	0.0%	+48.9%	0.011%
10/14/2025	Farther Finance Advisors LLC	535	$36K	0.0%	+17,733.3%	0.010%
9/24/2025	Texas Permanent School Fund Corp	3,301	$0.31M	0.0%	+37.6%	0.060%
8/19/2025	Ranger Investment Management L.P.	214,290	$20.19M	1.4%	-7.2%	3.895%
8/16/2025	Public Sector Pension Investment Board	18,528	$1.75M	0.0%	+7.4%	0.337%
8/15/2025	Tower Research Capital LLC TRC	842	$79K	0.0%	+432.9%	0.015%
8/15/2025	State of Tennessee Department of Treasury	3,221	$0.30M	0.0%	-8.1%	0.059%
8/15/2025	Select Equity Group L.P.	102,198	$9.63M	0.0%	+38.3%	1.858%
8/15/2025	Man Group plc	7,869	$0.74M	0.0%	+57.1%	0.143%
8/15/2025	BBR Partners LLC	25,195	$2.37M	0.1%	-8.7%	0.458%
8/15/2025	BNP Paribas Financial Markets	786	$74K	0.0%	+115.3%	0.014%
8/15/2025	Brevan Howard Capital Management LP	2,299	$0.22M	0.0%	N/A	0.042%
8/15/2025	Bank of America Corp DE	64,928	$6.12M	0.0%	-3.5%	1.181%
8/15/2025	Ameriprise Financial Inc.	73,513	$6.93M	0.0%	-55.9%	1.337%
8/14/2025	Jane Street Group LLC	13,785	$1.30M	0.0%	+96.4%	0.251%
8/14/2025	Raymond James Financial Inc.	185,555	$17.48M	0.0%	-29.7%	3.374%
8/14/2025	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	2,840	$0.27M	0.0%	-7.4%	0.052%
8/14/2025	Sei Investments Co.	4,362	$0.41M	0.0%	-19.5%	0.079%
8/14/2025	Qube Research & Technologies Ltd	19,898	$1.88M	0.0%	+436.6%	0.362%
8/13/2025	Gabelli Funds LLC	25,156	$2.37M	0.0%	N/A	0.457%
8/13/2025	Gamco Investors INC. ET AL	3,930	$0.37M	0.0%	N/A	0.071%
8/13/2025	Kennedy Capital Management LLC	90,479	$8.53M	0.2%	-20.1%	1.644%
8/13/2025	State Board of Administration of Florida Retirement System	2,564	$0.24M	0.0%	+17.1%	0.047%
8/12/2025	Boston Partners	5,421	$0.51M	0.0%	+16.3%	0.099%
8/12/2025	American Century Companies Inc.	13,431	$1.27M	0.0%	+1.5%	0.244%
8/12/2025	Segall Bryant & Hamill LLC	18,287	$1.72M	0.0%	-8.6%	0.332%
8/12/2025	Rhumbline Advisers	12,793	$1.21M	0.0%	-6.1%	0.233%
8/12/2025	Franklin Resources Inc.	3,476	$0.33M	0.0%	+5.5%	0.063%
8/12/2025	Legal & General Group Plc	14,657	$1.38M	0.0%	+5.4%	0.266%
8/12/2025	Swiss National Bank	10,402	$0.98M	0.0%	-1.9%	0.189%
8/12/2025	Dynamic Technology Lab Private Ltd	4,801	$0.45M	0.1%	N/A	0.087%
8/8/2025	Intech Investment Management LLC	2,593	$0.24M	0.0%	-10.4%	0.047%
8/8/2025	Creative Planning	6,353	$0.60M	0.0%	-18.4%	0.116%
8/8/2025	Geode Capital Management LLC	138,769	$13.08M	0.0%	+0.9%	2.523%
8/7/2025	Boston Partners	5,421	$0.51M	0.0%	+16.3%	0.099%
8/7/2025	Los Angeles Capital Management LLC	2,504	$0.24M	0.0%	-17.2%	0.046%
8/5/2025	Geneva Capital Management LLC	199,092	$18.76M	0.3%	+5.2%	3.620%
8/1/2025	Envestnet Asset Management Inc.	20,483	$1.93M	0.0%	+7.5%	0.372%
7/31/2025	MQS Management LLC	2,194	$0.21M	0.1%	N/A	0.040%
7/31/2025	AlphaQuest LLC	6,056	$0.57M	0.1%	+9,667.7%	0.110%
7/30/2025	Conestoga Capital Advisors LLC	566,150	$53.34M	0.8%	-0.9%	10.294%
7/16/2025	State of Alaska Department of Revenue	3,224	$0.30M	0.0%	+7.1%	0.059%
7/7/2025	Kings Path Partners LLC	3,405	$0.32M	0.1%	-18.2%	0.062%
5/29/2025	Rhumbline Advisers	13,628	$1.62M	0.0%	+4.4%	0.251%
5/19/2025	Jane Street Group LLC	7,019	$0.83M	0.0%	-79.6%	0.129%
5/19/2025	UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC	19,977	$2.37M	0.0%	+3.6%	0.368%
5/16/2025	Goldman Sachs Group Inc.	15,334	$1.82M	0.0%	-48.8%	0.281%
5/16/2025	Select Equity Group L.P.	73,897	$8.77M	0.0%	+439.0%	1.360%
5/16/2025	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	3,068	$0.36M	0.0%	+4.9%	0.056%
5/16/2025	Jacobs Levy Equity Management Inc.	2,820	$0.34M	0.0%	N/A	0.052%
5/16/2025	AQR Capital Management LLC	8,156	$0.97M	0.0%	-25.1%	0.150%

Data available starting January 2016

Mesa Laboratories, Inc. develops, designs, manufactures, sells, and services life sciences tools and quality control products and services in North America, Europe, the Asia Pacific, and internationally. The Sterilization and Disinfection Control segment offers biological, chemical, and cleaning indicators, used to assess the effectiveness of sterilization decontamination, disinfection, and cleaning processes in the pharmaceutical, medical device, and healthcare industries. This segment also provides testing and laboratory services to the dental and pharmaceutical industries. The Clinical Genomics segment offers MassARRAY, a genetic analysis tool system, and related consumables, including chips, panels, and chemical reagent solutions used by clinical labs to analyze DNA samples for inherited genetic disease testing, pharmacogenetics, oncology testing, infectious disease testing, doping and toxicology testing, and other differentiated applications for use in research. The Biopharmaceutical Development segment provides automated systems, such as Gyrolab xPand and Gyrolab xPlore hardware and software, Gyrolab Bioaffy consumable microfluidic disks, Gyrolab kits and Rexxip buffers for protein analysis; PurePep Chorus and Symphony instruments for peptide synthesis; and PurePep EasyClean products for purifying peptides. The Calibration Solutions segment offers quality control products to measure and calibrate critical parameters in applications, such as environmental and process monitoring, dialysis, gas flow, air quality, and torque testing in medical device and pharmaceutical manufacturing, laboratory, and hospital environments. This segment's products include continuous monitoring systems, dialysate meters and consumables, data loggers, gas flow calibration and air sampling equipment, and torque testing systems, offered under DialyGuard, ViewPoint, DataTrace, DryCal, and BGI brands. The company was incorporated in 1982 and is headquartered in Lakewood, Colorado.

Today's Range

Now: $77.15

$75.55

$80.31

50 Day Range

MA: $74.34

$64.07

$81.83

52 Week Range

Now: $77.15

$55.45

$155.12

Volume

128,663 shs

Average Volume

176,282 shs

Market Capitalization

$425.87 million

P/E Ratio

N/A

Dividend Yield

0.84%

Beta

0.9

Who are the company insiders with the largest holdings of Mesa Laboratories?: Mesa Laboratories' top insider shareholders include:
Gary M Owens (CEO)
John Sakys (CFO)
Brian David Archbold (SVP)
Learn More about top insider investors at Mesa Laboratories.
Who are the major institutional investors of Mesa Laboratories?: Mesa Laboratories' top institutional shareholders include:
Conestoga Capital Advisors LLC — 7.75%
Vanguard Group Inc. — 5.85%
Ranger Investment Management L.P. — 3.81%
Geneva Capital Management LLC — 3.48%
Simcoe Capital Management LLC — 3.47%
Royce & Associates LP — 2.70%
Learn More about top institutional investors of Mesa Laboratories stock.
Which major investors are selling Mesa Laboratories stock?: In the previous quarter, MLAB stock was sold by these institutional investors:
Russell Investments Group Ltd.
Conestoga Capital Advisors LLC
Glenmede Investment Management LP
Raymond James Financial Inc.
Royce & Associates LP
Vanguard Group Inc.
Ameriprise Financial Inc.
Principal Financial Group Inc.
In the previous year, company insiders that have sold Mesa Laboratories company stock include:
Gary M Owens (CEO)
John Sakys (CFO)
Brian David Archbold (SVP)
Learn More investors selling Mesa Laboratories stock.
Which major investors are buying Mesa Laboratories stock?: In the last quarter, MLAB stock was acquired by institutional investors including:
Simcoe Capital Management LLC
Boston Partners
Diamond Hill Capital Management Inc.
Roubaix Capital LLC
Millennium Management LLC
Mason Capital Management LLC
Herald Investment Management Ltd
Kennedy Capital Management LLC