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Mesa Laboratories
MLAB

154 hedge funds and large institutions have $489M invested in Mesa Laboratories in 2025 Q2 according to their latest regulatory filings, with 24 funds opening new positions, 48 increasing their positions, 54 reducing their positions, and 19 closing their positions.

New
Increased
Maintained
Reduced
Closed

26% more first-time investments, than exits

New positions opened: 24 | Existing positions closed: 19

2% more funds holding

Funds holding: 151 → 154 (+3)

0.04% less ownership

Funds ownership: 95.19% → 95.15% (-0.04%)

11% less repeat investments, than reductions

Existing positions increased: 48 | Existing positions reduced: 54

20% less capital invested

Capital invested by funds: $613M → $489M (-$124M)

Holders
154
Holders Change
+3
Holders Change %
+1.99%
% of All Funds
2.03%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
24
Increased
48
Reduced
54
Closed
19
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
Renaissance Technologies
Renaissance Technologies
New York
+$6.57M
2
Millennium Management
Millennium Management
New York
+$6.33M
3
Janus Henderson Group
Janus Henderson Group
United Kingdom
+$3.57M
4
Select Equity Group
Select Equity Group
New York
+$3.11M
5
CIC
Crawford Investment Counsel
Georgia
+$2.8M

Top Sellers

Rank Fund Capital Flow
1
Ameriprise
Ameriprise
Minnesota
-$10.2M
2
Raymond James Financial
Raymond James Financial
Florida
-$8.61M
3
BlackRock
BlackRock
New York
-$4M
4
RA
Royce & Associates
New York
-$2.58M
5
KCM
Kennedy Capital Management
Missouri
-$2.5M
Name Holding Trade Value Shares
Change 		Change in
Stake
Thrivent Financial for Lutherans
76
Thrivent Financial for Lutherans
Minnesota
$377K +$549 +5 +0.1%
GI
77
GAMCO Investors
Connecticut
$370K +$431K +3,930 New
T. Rowe Price Associates
78
T. Rowe Price Associates
Maryland
$361K +$26.4K +241 +7%
Franklin Resources
79
Franklin Resources
California
$328K +$20K +182 +6%
KPP
80
Kings Path Partners
Texas
$321K -$83K -756 -18%
State of Tennessee, Department of Treasury
81
State of Tennessee, Department of Treasury
Tennessee
$303K -$31.3K -285 -8%
SOADOR
82
State of Alaska Department of Revenue
Alaska
$303K +$23.4K +213 +7%
Fidelity Investments
83
Fidelity Investments
Massachusetts
$275K +$2.85K +26 +0.9%
MIM
84
MetLife Investment Management
New Jersey
$272K – – –
IMRF
85
Illinois Municipal Retirement Fund
Illinois
$272K -$19.3K -176 -6%
Mirae Asset Global ETFs Holdings
86
Mirae Asset Global ETFs Holdings
Hong Kong
$268K -$25K -228 -7%
P
87
&Partners
Tennessee
$251K -$5.49K -50 -2%
IIM
88
INTECH Investment Management
Florida
$244K -$33K -301 -10%
State Board of Administration of Florida Retirement System
89
State Board of Administration of Florida Retirement System
Florida
$242K +$41K +374 +17%
Los Angeles Capital Management
90
Los Angeles Capital Management
California
$236K -$57.1K -520 -17%
LSERS
91
Louisiana State Employees Retirement System
Louisiana
$236K -$11K -100 -4%
BHCM
92
Brevan Howard Capital Management
Jersey
$217K +$252K +2,299 New
Cambridge Investment Research Advisors
93
Cambridge Investment Research Advisors
Iowa
$212K -$4.83K -44 -2%
VF
94
Virtu Financial
New York
$210K +$244K +2,226 New
MM
95
MQS Management
New York
$207K +$241K +2,194 New
New York State Common Retirement Fund
96
New York State Common Retirement Fund
New York
$202K – – –
Victory Capital Management
97
Victory Capital Management
Texas
$180K -$746K -6,798 -78%
SAM
98
Smartleaf Asset Management
Massachusetts
$168K -$10.2K -93 -5%
TRSOTSOK
99
Teachers Retirement System of the State of Kentucky
Kentucky
$152K – – –
AB
100
Amalgamated Bank
New York
$146K – – –
2 3
4
5 6

MLAB Hedge Fund Activity: Q2 2025 in Review

154 of the 7,596 institutional investors tracked by Wall St. Rank reported a position in Mesa Laboratories (MLAB) for Q2 2025, worth a combined $489M — down 20% from $613M a quarter earlier.

Buyers outnumbered sellers: 24 funds opened new MLAB positions and 19 closed out — a net gain of 5 holders — while 48 added to existing stakes and 54 trimmed.

The largest buyer was Renaissance Technologies, adding an estimated $6.57M. The largest seller was Ameriprise, cutting an estimated $10.2M.

  • 154 institutional investors held Mesa Laboratories (MLAB) as of Q2 2025, up from 151 in Q1 2025.
  • Funds reported $489M of Mesa Laboratories stock for Q2 2025, down 20% quarter-over-quarter.
  • 24 funds opened new Mesa Laboratories positions in Q2 2025 and 19 closed out, a net change of +5 holders.
  • The largest Mesa Laboratories buyer in Q2 2025 was Renaissance Technologies, an estimated $6.57M added.
  • The largest Mesa Laboratories seller in Q2 2025 was Ameriprise, an estimated $10.2M sold.

Based on aggregated 13F filings for Q2 2025.