Mesa Laboratories
MLAB
161 hedge funds and large institutions have $427M invested in Mesa Laboratories in 2026 Q1 according to their latest regulatory filings, with 26 funds opening new positions, 61 increasing their positions, 42 reducing their positions, and 20 closing their positions.
45% more repeat investments, than reductions
Existing positions increased: 61 | Existing positions reduced: 42
30% more first-time investments, than exits
New positions opened: 26 | Existing positions closed: 20
15% more capital invested
Capital invested by funds: $372M → $427M (+$54.1M)
1.46% more ownership
Funds ownership: 85.92% → 87.38% (+1.5%)
1% more funds holding
Funds holding: 159 → 161 (+2)
0% more funds holding in top 10
Funds holding in top 10: 2 → 2 (0)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
LPP
Long Path Partners
Stamford,
Connecticut
|
+$15.4M |
| 2 |
AQR Capital Management
Greenwich,
Connecticut
|
+$8.65M |
| 3 |
MCM
Monimus Capital Management
Woodbridge,
New Jersey
|
+$5.21M |
| 4 |
Boston Partners
Boston,
Massachusetts
|
+$4.77M |
| 5 |
WA
Wasatch Advisors
Salt Lake City,
Utah
|
+$4.41M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
GCM
Geneva Capital Management
Milwaukee,
Wisconsin
|
-$14M |
| 2 |
MCM
Mason Capital Management
New York
|
-$5.52M |
| 3 |
Jane Street
New York
|
-$4.43M |
| 4 |
Citadel Advisors
Miami,
Florida
|
-$4.32M |
| 5 |
Janus Henderson Group
London,
|
-$4.07M |
MLAB Hedge Fund Activity: Q1 2026 in Review
161 of the 8,187 institutional investors tracked by Wall St. Rank reported a position in Mesa Laboratories (MLAB) for Q1 2026, worth a combined $427M — up 15% from $372M a quarter earlier.
Buyers outnumbered sellers: 26 funds opened new MLAB positions and 20 closed out — a net gain of 6 holders — while 61 added to existing stakes and 42 trimmed.
The largest buyer was Long Path Partners, adding an estimated $15.4M. The largest seller was Geneva Capital Management, exiting entirely with an estimated $14M sold.
- 161 institutional investors held Mesa Laboratories (MLAB) as of Q1 2026, up from 159 in Q4 2025.
- Funds reported $427M of Mesa Laboratories stock for Q1 2026, up 15% quarter-over-quarter.
- 26 funds opened new Mesa Laboratories positions in Q1 2026 and 20 closed out, a net change of +6 holders.
- The largest Mesa Laboratories buyer in Q1 2026 was Long Path Partners, an estimated $15.4M added.
- The largest Mesa Laboratories seller in Q1 2026 was Geneva Capital Management, an estimated $14M sold.
Based on aggregated 13F filings for Q1 2026.