Mesa Laboratories
MLAB
159 hedge funds and large institutions have $501M invested in Mesa Laboratories in 2026 Q2 according to their latest regulatory filings, with 21 funds opening new positions, 73 increasing their positions, 38 reducing their positions, and 18 closing their positions.
92% more repeat investments, than reductions
Existing positions increased: 73 | Existing positions reduced: 38
17% more capital invested
Capital invested by funds: $427M → $501M (+$74.3M)
17% more first-time investments, than exits
New positions opened: 21 | Existing positions closed: 18
3.7% more ownership
Funds ownership: 87.38% → 91.08% (+3.7%)
1% less funds holding
Funds holding: 161 → 159 (-2)
50% less funds holding in top 10
Funds holding in top 10: 2 → 1 (-1)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Jacobs Levy Equity Management
Florham Park,
New Jersey
|
+$8.7M |
| 2 |
Fidelity Investments
Boston,
Massachusetts
|
+$8.29M |
| 3 |
Jane Street
New York
|
+$7.21M |
| 4 |
LPP
Long Path Partners
Stamford,
Connecticut
|
+$7.2M |
| 5 |
WA
Wasatch Advisors
Salt Lake City,
Utah
|
+$6.49M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Select Equity Group
New York
|
-$20.9M |
| 2 |
RC
Roubaix Capital
Denver,
Colorado
|
-$6.38M |
| 3 |
RA
Royce & Associates
New York
|
-$4.81M |
| 4 |
MCM
Monimus Capital Management
Woodbridge,
New Jersey
|
-$4.63M |
| 5 |
RIM
Ranger Investment Management
Dallas,
Texas
|
-$2.91M |
MLAB Hedge Fund Activity: Q2 2026 in Review
159 of the 8,305 institutional investors tracked by Wall St. Rank reported a position in Mesa Laboratories (MLAB) for Q2 2026, worth a combined $501M — up 17% from $427M a quarter earlier.
Buyers outnumbered sellers: 21 funds opened new MLAB positions and 18 closed out — a net gain of 3 holders — while 73 added to existing stakes and 38 trimmed.
The largest buyer was Jacobs Levy Equity Management, adding an estimated $8.7M. The largest seller was Select Equity Group, exiting entirely with an estimated $20.9M sold.
- 159 institutional investors held Mesa Laboratories (MLAB) as of Q2 2026, down from 161 in Q1 2026.
- Funds reported $501M of Mesa Laboratories stock for Q2 2026, up 17% quarter-over-quarter.
- 21 funds opened new Mesa Laboratories positions in Q2 2026 and 18 closed out, a net change of +3 holders.
- The largest Mesa Laboratories buyer in Q2 2026 was Jacobs Levy Equity Management, an estimated $8.7M added.
- The largest Mesa Laboratories seller in Q2 2026 was Select Equity Group, an estimated $20.9M sold.
Based on aggregated 13F filings for Q2 2026.