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, 53 reducing their positions, and 19 closing their positions.
26% more first-time investments, than exits
New positions opened: 24 | Existing positions closed: 19
2% more funds holding
Funds holding: 151 → 154 (+3)
0.03% less ownership
Funds ownership: 95.18% → 95.15% (-0.03%)
9% less repeat investments, than reductions
Existing positions increased: 48 | Existing positions reduced: 53
20% less capital invested
Capital invested by funds: $613M → $489M (-$124M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Renaissance Technologies
New York
|
+$6.57M |
| 2 |
Millennium Management
New York
|
+$6.33M |
| 3 |
Janus Henderson Group
London,
|
+$3.57M |
| 4 |
Select Equity Group
New York
|
+$3.11M |
| 5 |
CIC
Crawford Investment Counsel
Atlanta,
Georgia
|
+$2.8M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Ameriprise
Minneapolis,
Minnesota
|
-$10.2M |
| 2 |
Raymond James Financial
St Petersburg,
Florida
|
-$8.61M |
| 3 |
BlackRock
New York
|
-$4M |
| 4 |
RA
Royce & Associates
New York
|
-$2.58M |
| 5 |
KCM
Kennedy Capital Management
St Louis,
Missouri
|
-$2.5M |
MLAB Hedge Fund Activity: Q2 2025 in Review
154 of the 7,613 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 53 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.