MLAB Institutional Ownership
Who owns Mesa Laboratories Inc and what the big funds did with it last quarter, from every SEC 13F filing. 159 funds reported holding MLAB at Jun 30, 2026, together owning 89.9% of the company.
- ▲92 buying vs 56 selling
- ▲Held by funds +3.7 pts
- ▼Funds holding -2
- ▲Superinvestors: 2 added, 1 cut
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 159 | 161 | −1.2% |
| In funds' top 10 | 1 | 2 | −50.0% |
| 13F shares | 5M | 4.8M | +4.2% |
| Held by funds | 89.9% | 86.3% | +3.7 pts |
| New positions | 19 | 22 | −13.6% |
| Increased | 73 | 59 | +23.7% |
| Reduced | 38 | 42 | −9.5% |
| Sold out | 18 | 20 | −10.0% |
| Calls (shares) | 0 | 0 | – |
| Puts (shares) | 0 | 0 | – |
| Put/call ratio | – | – | – |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in MLAB
All superinvestors →
Who owns MLAB
share of fund held shares- Index and passive funds26.5%
- Active managers and hedge funds60.7%
- Banks and brokers12.1%
- Pensions, insurers and other0.7%
The top 10 holders own 47.9% of all MLAB shares that funds reported. Groups are our own grouping of filers by name.
Filed so far for Q3 2026
26 funds changed their position- Wasatch Advisors LPAdded+271K sh
- HERALD INVESTMENT MANAGEMENT LtdSold out−43K sh
- Principal Financial Group IncAdded+18K sh
- B. Metzler seel. Sohn & Co. AGNew+7,820 sh
- Y-Intercept (Hong Kong) LtdSold out−10K sh
🔒 Free account: see all 20.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | Long Path Partners LP | 8.53% | 477K | $47.5M | +72K |
| 2 | BlackRock, Inc. | 7.87% | 441K | $43.9M | +47K |
| 3 | Boston Partners | 4.74% | 265K | $26.4M | −3,562 |
| 4 | Vanguard Capital Management LLC | 4.24% | 237K | $23.6M | +4,814 |
| 5 | AQR Capital Management LLC | 3.64% | 204K | $20.3M | +33K |
| 6 | Ranger Investment Management, L.P. | 3.11% | 174K | $17.3M | −29K |
| 7 | Morgan Stanley | 2.81% | 157K | $15.6M | −5,137 |
| 8 | Diamond Hill Capital Management, LLC (Investment Advisor) | 2.78% | 156K | $15.5M | +469 |
| 9 | Raymond James Financial Inc | 2.68% | 150K | $14.9M | +27K |
| 10 | Dimensional Fund Advisors LP | 2.65% | 148K | $14.8M | +24K |
- Jacobs Levy Equity Management, Inc+86K sh+$8.6M
- Fmr LLC+82K sh+$8.2M
- Jane Street Group, LLC+72K sh+$7.1M
- Long Path Partners LP+72K sh+$7.1M
- Wasatch Advisors LP+64K sh+$6.4M
- BlackRock, Inc.+47K sh+$4.6M
- Qube Research & Technologies Ltd+37K sh+$3.7M
- AQR Capital Management LLC+33K sh+$3.3M
- Select Equity Group, L.P.−236K sh−$20.9M
- Roubaix Capital, LLC−72K sh−$6.4M
- Royce & Associates LP−48K sh−$4.8M
- Monimus Capital Management, LP−46K sh−$4.6M
- Ranger Investment Management, L.P.−29K sh−$2.9M
- Lazard Asset Management LLC−20K sh−$1.8M
- Trexquant Investment LP−19K sh−$1.7M
- Russell Investments Group, Ltd.−13K sh−$1.3M
MLAB institutional ownership FAQ
Who owns the most MLAB stock?
In Q2 2026 13F filings the largest holder of MLAB was Long Path Partners LP, followed by BlackRock, Inc. and Boston Partners. Index fund managers are usually the biggest holders of large companies.
What percentage of MLAB is owned by institutions?
Funds that file 13F reports held 89.9% of MLAB's shares at Jun 30, 2026, compared with 86.3% a quarter earlier. That counts every manager with more than $100 million in US stocks.
Are hedge funds buying MLAB?
In Q2 2026, 92 funds bought MLAB (19 of them new positions) and 56 sold (18 sold out completely). Among well known investors, 2 added and 1 cut. Our fund sentiment for MLAB is bullish.
What is MLAB's institutional put/call ratio?
Too few option positions were reported for a meaningful ratio.
How current is this MLAB ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.