MLAB Mesa Laboratories, Inc.
Mesa Laboratories, Inc. (MLAB) Institutional Ownership
What the institutions did with MLAB last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeLargest holders
| Manager | Shares | % of reported |
|---|---|---|
| Long Path Partners LP | 477.1K | 9.5% |
| BlackRock, Inc. | 440.6K | 8.8% |
| Boston Partners | 265.1K | 5.3% |
| VANGUARD CAPITAL MANAGEMENT LLC | 237.5K | 4.7% |
| AQR CAPITAL MANAGEMENT LLC | 203.7K | 4.1% |
| Ranger Investment Management, L.P. | 174.0K | 3.5% |
| MORGAN STANLEY | 157.0K | 3.1% |
| Diamond Hill Capital Management, LLC (Investment Advisor) | 155.8K | 3.1% |
| RAYMOND JAMES FINANCIAL INC | 149.9K | 3.0% |
| DIMENSIONAL FUND ADVISORS LP | 148.4K | 3.0% |
| GEODE CAPITAL MANAGEMENT, LLC | 139.7K | 2.8% |
| KENNEDY CAPITAL MANAGEMENT LLC | 138.3K | 2.7% |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 130.8K | 2.6% |
| STATE STREET CORP | 124.3K | 2.5% |
| Russell Investments Group, Ltd. | 121.8K | 2.4% |
| WASATCH ADVISORS LP | 115.7K | 2.3% |
| ROYCE & ASSOCIATES LP | 113.4K | 2.3% |
| CRAWFORD INVESTMENT COUNSEL INC | 98.8K | 2.0% |
| FMR LLC | 88.9K | 1.8% |
| D. E. Shaw & Co., Inc. | 81.8K | 1.6% |
| JANE STREET GROUP, LLC | 71.6K | 1.4% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 69.4K | 1.4% |
| Meros Investment Management, LP | 68.0K | 1.4% |
| NORTHERN TRUST CORP | 65.7K | 1.3% |
| GOLDMAN SACHS GROUP INC | 64.3K | 1.3% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Select Equity Group, L.P. | Sold Out | 235.9K | 0 | -235.9K |
| JACOBS LEVY EQUITY MANAGEMENT, INC | Increased | 44.4K | 130.8K | +86.4K |
| FMR LLC | Increased | 6.5K | 88.9K | +82.4K |
| Roubaix Capital, LLC | Sold Out | 72.1K | 0 | -72.1K |
| JANE STREET GROUP, LLC | New | 0 | 71.6K | +71.6K |
| Long Path Partners LP | Increased | 405.6K | 477.1K | +71.5K |
| WASATCH ADVISORS LP | Increased | 51.2K | 115.7K | +64.4K |
| ROYCE & ASSOCIATES LP | Reduced | 161.2K | 113.4K | -47.8K |
| BlackRock, Inc. | Increased | 393.9K | 440.6K | +46.7K |
| MONIMUS CAPITAL MANAGEMENT, LP | Reduced | 101.3K | 55.3K | -45.9K |
| Qube Research & Technologies Ltd | New | 0 | 37.4K | +37.4K |
| AQR CAPITAL MANAGEMENT LLC | Increased | 170.6K | 203.7K | +33.2K |
| Ranger Investment Management, L.P. | Reduced | 202.9K | 174.0K | -28.9K |
| CITADEL ADVISORS LLC | Increased | 8.4K | 35.9K | +27.5K |
| D. E. Shaw & Co., Inc. | Increased | 54.6K | 81.8K | +27.2K |
| RAYMOND JAMES FINANCIAL INC | Increased | 122.9K | 149.9K | +27.0K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 124.6K | 148.4K | +23.8K |
| Man Group plc | Increased | 2.5K | 24.1K | +21.6K |
| LAZARD ASSET MANAGEMENT LLC | Sold Out | 20.3K | 0 | -20.3K |
| Trexquant Investment LP | Sold Out | 18.7K | 0 | -18.7K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 52.6K | 69.4K | +16.8K |
| NFJ INVESTMENT GROUP, LLC | New | 0 | 14.3K | +14.3K |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO | Sold Out | 13.7K | 0 | -13.7K |
| Russell Investments Group, Ltd. | Reduced | 135.1K | 121.8K | -13.2K |
| TWO SIGMA INVESTMENTS, LP | Increased | 16.4K | 29.2K | +12.9K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.