Mesa Laboratories

MLAB • NASDAQ

Mesa Laboratories is a hardware, equipment & parts company in the technology sector on NASDAQ, led by Gary M. Owens, with a market cap of $429.5M. As of Q3 2025, 91% of shares are held by 140 institutional investors, with Conestoga Capital Advisors, LLC as the largest holder at 7.75%.

CEO and PresidentGary M. Owens

Market Cap$429.5M

Hardware, Equipment & Parts

Technology

Employees736.0

Websitemesalabs.com

Country

United States of America

Overview

Overview of institutional ownership in MLAB as of Q3 2025 with a market cap of $368.7M

All Institutions

Institutions: 140
Value Held: $334.1M
Shares Held: 5.0M
Avg Position: $2.4M
Median Position: $365.5K

Hedge Funds

Hedge Funds: 21
Value Held: $61.9M
Shares Held: 924.2K
Avg Position: $2.9M
Median Position: $730.4K

Ownership Breakdown

Institutional (non-HF)

73.83%

$272.2M

Hedge Funds

16.8%

$61.9M

Retail & Other

9.37%

$34.5M

Based on market cap of $368.7M as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.

Biggest Investors

Institutions with the largest positions in MLAB as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
Conestoga Capital Advisors, LLC Long Only Manager	Joseph Francis Monahan Partner	$28.6M 0.46% of portfolio	7.75% 426.5K shares	≤ Q2 2013 Held for 12y 5m+	$6.2B
B BlackRock, Inc. Institution	-	$26.1M 0.00% of portfolio	7.07% 388.8K shares	Q2 2015 Held for 10y 5m	$5.67T
VANGUARD GROUP INC Institution	Salim Ramji CEO	$21.6M 0.00% of portfolio	5.85% 321.7K shares	≤ Q2 2013 Held for 12y 5m+	$6.69T
MORGAN STANLEY RIA/Wealth	Jed Finn CEO	$17.1M 0.00% of portfolio	4.63% 255.0K shares	≤ Q2 2013 Held for 12y 5m+	$1.65T
Ranger Investment Management, L.P. Long Only Manager	Andrew Ferguson Hill President	$14.1M 0.98% of portfolio	3.81% 209.7K shares	Q3 2014 Held for 11y 2m	$1.4B
GENEVA CAPITAL MANAGEMENT LTD/WI Long Only Manager	Jose Manuel Munoz Quiroga Managing Partner	$12.8M 0.22% of portfolio	3.48% 191.4K shares	Q3 2022 Held for 3y 2m	$5.8B
Simcoe Capital Management, LLC Hedge Fund•Long/Short	Jeffrey Nmn Jacobowitz Managing Partner	$12.8M 1.85% of portfolio	3.47% 190.9K shares	Q3 2025 Held for 2 months	$689.9M
R ROYCE & ASSOCIATES LLC Institution	-	$10.0M 0.10% of portfolio	2.70% 148.6K shares	≤ Q2 2013 Held for 12y 5m+	$10.0B
HENDERSON GROUP PLC Institution	Ali Dibadj CEO	$9.8M 0.00% of portfolio	2.65% 145.7K shares	Q1 2023 Held for 2y 8m	$218.74B
K Kent Lake PR LLC Hedge Fund•Long/Short	Benjamin Natter Managing Partner	$9.0M 4.61% of portfolio	2.45% 134.5K shares	Q3 2025 Held for 2 months	$195.5M

Net Capital Flow

Institutional buying and selling activity for MLAB in Q3 2025

Traded: −$6.1M
Buyers: 73
Sellers: 87
Total Bought: +$89.3M
Total Sold: −$95.4M
Avg Position: $1.9M

Biggest Buyers

Institution	Net Bought	Current Position
Simcoe Capital Management, LLC Hedge Fund•Long/Short	+$12.8M +190.9K shares	$12.8M 190.9K shares
K Kent Lake PR LLC Hedge Fund•Long/Short	+$9.0M +134.5K shares	$9.0M 134.5K shares
Robeco Investment Management, Inc. Long Only Manager	+$7.3M +108.9K shares	$7.7M 114.4K shares
DIAMOND HILL CAPITAL MANAGEMENT INC Long Only Manager	+$5.7M +84.6K shares	$8.3M 123.4K shares
R Roubaix Capital, LLC Hedge Fund•Long/Short	+$5.1M +76.7K shares	$5.1M 76.7K shares
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	+$5.1M +76.1K shares	$9.0M 133.8K shares
MASON CAPITAL MANAGEMENT LLC Hedge Fund•Event Driven	+$4.7M +70.3K shares	$4.7M 70.3K shares
Meros Investment Management, LP Long Only Manager	+$2.7M +39.9K shares	$5.1M 76.5K shares
H Herald Investment Management Ltd Institution	+$2.5M +37.5K shares	$3.3M 50.0K shares
MORGAN STANLEY RIA/Wealth	+$2.4M +36.2K shares	$17.1M 255.0K shares

Biggest Sellers

Institution	Net Sold	Current Position
B BlackRock, Inc. Institution	−$27.0M −402.3K shares	$26.1M 388.8K shares
Conestoga Capital Advisors, LLC Long Only Manager	−$9.4M −139.7K shares	$28.6M 426.5K shares
RAYMOND JAMES FINANCIAL INC RIA/Wealth	−$9.3M −138.2K shares	$3.2M 47.4K shares
R ROYCE & ASSOCIATES LLC Institution	−$6.6M −99.0K shares	$10.0M 148.6K shares
STATE STREET CORP Institution	−$6.2M −92.9K shares	$8.0M 118.9K shares
VANGUARD GROUP INC Institution	−$4.5M −67.7K shares	$21.6M 321.7K shares
RENAISSANCE TECHNOLOGIES LLC Hedge Fund•Quant	−$3.8M −57.1K shares	$730.4K 10.9K shares
AMERIPRISE FINANCIAL INC Institution	−$2.3M −34.4K shares	$2.6M 39.1K shares
WELLINGTON MANAGEMENT CO LLP Long Only Manager	−$2.1M −22.5K shares	Sold Off 0 shares
P PUBLIC SECTOR PENSION INVESTMENT BOARD Institution	−$1.7M −18.5K shares	Sold Off 0 shares

Entry and Exit Activity

Institutions that initiated new positions or completely exited MLAB in Q3 2025

New Positions: 10
New Value: $34.4M
Exited Positions: 39
Exited Value: $13.2M

New Positions

Institution	Position Value
Simcoe Capital Management, LLC Hedge Fund•Long/Short	$12.8M 190.9K shares
K Kent Lake PR LLC Hedge Fund•Long/Short	$9.0M 134.5K shares
R Roubaix Capital, LLC Hedge Fund•Long/Short	$5.1M 76.7K shares
MASON CAPITAL MANAGEMENT LLC Hedge Fund•Event Driven	$4.7M 70.3K shares
M MONIMUS CAPITAL MANAGEMENT, LP Hedge Fund•Long/Short	$2.3M 33.7K shares
ACADIAN ASSET MANAGEMENT LLC Long Only Manager	$270.9K 4.0K shares
Numerai GP LLC Hedge Fund•Quant	$241.9K 3.6K shares
O Optiver Holding B.V. Institution	$2.5K 38.0 shares
C Cedar Mountain Advisors, LLC RIA/Wealth	$670.0 10.0 shares
S Salomon & Ludwin, LLC Institution	$293.0 4.0 shares

Exited Positions

Institution	Previous Position
WELLINGTON MANAGEMENT CO LLP Long Only Manager	$2.1M 22.5K shares
P PUBLIC SECTOR PENSION INVESTMENT BOARD Institution	$1.7M 18.5K shares
UBS GLOBAL ASSET MANAGEMENT AMERICAS INC Long Only Manager	$1.6M 17.4K shares
S Swiss National Bank Institution	$980.1K 10.4K shares
M Man Group plc Institution	$741.4K 7.9K shares
G GREAT WEST LIFE ASSURANCE CO /CAN/ Institution	$652.7K 6.9K shares
PRUDENTIAL FINANCIAL INC Institution	$533.1K 5.7K shares
R RSM US WEALTH MANAGEMENT LLC RIA/Wealth	$468.4K 5.0K shares
D Dynamic Technology Lab Private Ltd Institution	$452.4K 4.8K shares
THRIVENT FINANCIAL FOR LUTHERANS Insurance Manager	$376.5K 4.0K shares

Options Activity

Institutions with the largest Call and Put options positions in MLAB as of Q3 2025

Call Positions: 0
Call Value: -
Put Positions: 0
Put Value: -

Call Positions

Institution	Position Value
No call positions found

Put Positions

Institution	Position Value
No put positions found

Most Committed Institutions

Institutions with MLAB as the highest % of their portfolio as of Q3 2025

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
K Kent Lake PR LLC Hedge Fund•Long/Short	Benjamin Natter Managing Partner	4.61% $9.0M	2.45% 134.5K shares	Q3 2025 Held for 2 months	$195.5M
R Roubaix Capital, LLC Hedge Fund•Long/Short	Christopher Edmund Hillary CEO	2.33% $5.1M	1.39% 76.7K shares	Q3 2025 Held for 2 months	$220.3M
Meros Investment Management, LP Long Only Manager	Kenneth Scott Canon CEO	2.19% $5.1M	1.39% 76.5K shares	Q2 2024 Held for 1y 5m	$234.2M
Simcoe Capital Management, LLC Hedge Fund•Long/Short	Jeffrey Nmn Jacobowitz Managing Partner	1.85% $12.8M	3.47% 190.9K shares	Q3 2025 Held for 2 months	$689.9M
M MONIMUS CAPITAL MANAGEMENT, LP Hedge Fund•Long/Short	Brian Jeffrey Bellinger Managing Partner	1.73% $2.3M	0.61% 33.7K shares	Q3 2025 Held for 2 months	$130.6M
Ranger Investment Management, L.P. Long Only Manager	Andrew Ferguson Hill President	0.98% $14.1M	3.81% 209.7K shares	Q3 2014 Held for 11y 2m	$1.4B
MASON CAPITAL MANAGEMENT LLC Hedge Fund•Event Driven	Samuel Thornton Read Managing Partner	0.96% $4.7M	1.28% 70.3K shares	Q3 2025 Held for 2 months	$491.1M
Conestoga Capital Advisors, LLC Long Only Manager	Joseph Francis Monahan Partner	0.46% $28.6M	7.75% 426.5K shares	≤ Q2 2013 Held for 12y 5m+	$6.2B
H Herald Investment Management Ltd Institution	-	0.45% $3.3M	0.91% 50.0K shares	Q4 2024 Held for 11 months	$745.8M
GENEVA CAPITAL MANAGEMENT LTD/WI Long Only Manager	Jose Manuel Munoz Quiroga Managing Partner	0.22% $12.8M	3.48% 191.4K shares	Q3 2022 Held for 3y 2m	$5.8B

Hedge Fund Spotlight

Discover hedge funds investing in MLAB

Select Equity Group, L.P.

Hedge Fund • Multi-Strategy

Portfolio ManagerGeorge Stabler Loening

Portfolio Value: $24.4B
Positions: 153
Last Reported: Q3 2025

Sector Allocation

Position in Mesa Laboratories

Market Value: $8.5M
Shares Held: 126.7K
Portfolio Weight: 0.03%
Owned Since: 2023-Q1

Top Holding	Sector	Market Value	Weight
1 CRH CRH	Construction Materials Basic Materials	$1.0B	4.24%
2 SGI Tempur Sealy International SGI	Furnishings, Fixtures & Appliances Consumer Cyclical	$987.7M	4.05%
3 SGI Silicon Graphics International Corp SGI	Unknown Unknown	$987.7M	4.05%

View full profile

Mesa Laboratories

Overview

All Institutions

Hedge Funds

Ownership Breakdown

Biggest Investors

Net Capital Flow

Biggest Buyers

Biggest Sellers

Entry and Exit Activity

New Positions

Exited Positions

Options Activity

Call Positions

Put Positions

Most Committed Institutions

Hedge Fund Spotlight

Position in Mesa Laboratories

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