Mesa LaboratoriesMLAB
13F holders, Q1 2026 (March 31)161holders +2
22new positions
19sold out
7famous investors
$88.37avg. 13F price*
At the end of Q1 2026, 161 institutions reported holding Mesa Laboratories Inc. (MLAB) in their 13F filings, up 2 from Q4 2025. 22 opened new positions and 19 sold out. The largest holders were Long Path Partners LP ($35.9M), BlackRock, Inc. ($34.8M) and Boston Partners ($23.8M). 7 famous investors held it, including Cliff Asness (0.0% of AQR Capital Management's portfolio), Mario Gabelli (0.0% of GAMCO Investors's portfolio) and Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio).
- Company
- Mesa Laboratories Inc.
- CUSIP
- 59064R109
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 22 | $11.8M |
| Exits | 19 | $32.2M |
All 13F filers, Q4 2025 → Q1 2026: 770,294 shares bought and 688,430 shares sold, net +81,864 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 161 holders
| Long Path Partners LP | 16.29% | Add +78.5% | 405,583 | $35.9M |
| BlackRock, Inc. | 0.00% | Reduce -1.2% | 393,851 | $34.8M |
| Boston Partners | 0.02% | Add +25.9% | 268,711 | $23.8M |
| Select Equity Group, L.P. | 0.11% | Add +14.3% | 235,885 | $20.9M |
| Vanguard Capital Management LLC | 0.00% | — | 232,643 | $20.6M |
| Ranger Investment Management, L.P. | 1.30% | Reduce -1.1% | 202,903 | $17.9M |
| AQR Capital Management | 0.01% | Add +143.2% | 170,562 | $15.1M |
| Morgan Stanley | 0.00% | Reduce -7.7% | 162,116 | $14.3M |
| Royce & Associates LP | 0.14% | Add +5.1% | 161,229 | $14.3M |
| Diamond Hill Capital Management, LLC (Investment Advisor) | 0.09% | Add +9.4% | 155,302 | $13.7M |
| Kennedy Capital Management LLC | 0.27% | Reduce -1.6% | 142,343 | $12.6M |
| Russell Investments Group, Ltd. | 0.01% | Add +16.1% | 135,069 | $11.9M |
| Geode Capital Management, LLC | 0.00% | Add +0.0% | 128,002 | $11.3M |
| Dimensional Fund Advisors LP | 0.00% | Add +7.1% | 124,630 | $11.0M |
| State Street Corp. | 0.00% | Add +1.2% | 122,068 | $10.8M |
| Raymond James Financial Inc. | 0.00% | Add +22.4% | 122,911 | $10.7M |
| Monimus Capital Management, LP | 2.48% | Add +148.0% | 101,292 | $9.0M |
| Crawford Investment Counsel Inc. | 0.14% | Add +17.6% | 95,535 | $8.4M |
| Roubaix Capital, LLC | 2.98% | Add +30.7% | 72,115 | $6.4M |
| Goldman Sachs Group Inc. | 0.00% | Add +27.8% | 70,617 | $6.2M |
| Janus Henderson Group PLC | 0.00% | Reduce -40.5% | 69,401 | $6.1M |
| Northern Trust Corp. | 0.00% | Add +5.5% | 69,264 | $6.1M |
| Meros Investment Management, LP | 2.61% | Reduce -20.0% | 68,032 | $6.0M |
| Gabelli Funds LLC | 0.04% | Add +2.9% | 62,499 | $5.5M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +0.8% | 62,424 | $5.5M |
| Bank of America Corp. | 0.00% | Add +5.9% | 57,871 | $5.1M |
| D. E. Shaw & Co. | 0.00% | Reduce -28.7% | 54,558 | $4.8M |
| Vanguard Portfolio Management LLC | 0.00% | — | 52,586 | $4.6M |
| Wasatch Advisors LP | 0.03% | New | 51,233 | $4.5M |
| HERALD INVESTMENT MANAGEMENT Ltd | 0.61% | No change | 50,000 | $4.4M |
| Jacobs Levy Equity Management, Inc. | 0.02% | Add +14.3% | 44,417 | $3.9M |
| Bank of New York Mellon Corp | 0.00% | Reduce -1.9% | 43,937 | $3.9M |
| Vanguard Fiduciary Trust Co. | 0.00% | — | 38,337 | $3.4M |
| Renaissance Technologies | 0.00% | Add +802.9% | 31,600 | $2.8M |
| BBR Partners, LLC | 0.12% | No change | 25,195 | $2.2M |
| Franklin Resources Inc. | 0.00% | Reduce -2.4% | 21,553 | $1.9M |
| Lazard Asset Management LLC | 0.00% | New | 20,328 | $1.8M |
| State of Wisconsin Investment Board | 0.00% | Reduce -15.9% | 19,006 | $1.7M |
| Trexquant Investment LP | 0.01% | Reduce -59.5% | 18,661 | $1.7M |
| Segall Bryant & Hamill, LLC | 0.02% | Reduce -0.2% | 18,174 | $1.6M |
| King Luther Capital Management Corp. | 0.01% | No change | 17,411 | $1.5M |
| Two Sigma Investments, LP | 0.00% | Add +33.7% | 16,359 | $1.4M |
| Point72 Asset Management | 0.00% | Add +21.2% | 16,309 | $1.4M |
| Creative Planning | 0.00% | Add +20.6% | 14,994 | $1.3M |
| Rice Hall James & Associates, LLC | 0.07% | Add +0.0% | 14,222 | $1.3M |
| CenterBook Partners LP | 0.07% | New | 14,194 | $1.3M |
| Invesco Ltd. | 0.00% | Add +9.8% | 14,103 | $1.2M |
| Public Employees Retirement System of Ohio | 0.00% | No change | 13,722 | $1.2M |
| American Century Companies Inc. | 0.00% | Reduce -0.7% | 13,373 | $1.2M |
| Royal Bank of Canada | 0.00% | Add +143.3% | 13,275 | $1.2M |
| UBS Group AG | 0.00% | Add +36.5% | 12,046 | $1.1M |
| Stifel Financial Corp. | 0.00% | Add +0.8% | 11,363 | $1.0M |
| Principal Financial Group Inc. | 0.00% | Reduce -25.5% | 11,088 | $980K |
| Numerai GP LLC | 0.10% | Reduce -26.5% | 10,952 | $968K |
| Globeflex Capital L P | 0.14% | New | 10,838 | $958K |
| Nuveen, LLC | 0.00% | Add +0.6% | 10,139 | $896K |
| Ieq Capital, LLC | 0.00% | New | 9,658 | $854K |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | Reduce -33.8% | 9,517 | $841K |
| Mariner, LLC | 0.00% | Add +170.6% | 8,966 | $793K |
| Quadrature Capital Ltd | 0.01% | Reduce -35.7% | 8,693 | $769K |
| Envestnet Asset Management Inc. | 0.00% | Add +24.4% | 8,624 | $763K |
| Citadel Advisors | 0.00% | Reduce -85.6% | 8,423 | $745K |
| GAMCO Investors | 0.01% | Add +1.0% | 7,834 | $693K |
| Vident Advisory, LLC | 0.01% | New | 7,608 | $673K |
| Sei Investments Co. | 0.00% | Reduce -11.6% | 7,403 | $655K |
| Cerity Partners LLC | 0.00% | Add +115.6% | 7,245 | $641K |
| Tudor Investment Corporation | 0.00% | Reduce -74.9% | 6,874 | $608K |
| Canada Pension Plan Investment Board | 0.00% | Add +83.8% | 6,800 | $601K |
| Rhumbline Advisers | 0.00% | Reduce -1.1% | 6,547 | $579K |
| FMR LLC | 0.00% | Add +664.8% | 6,470 | $572K |
| Y-Intercept (Hong Kong) Ltd | 0.01% | New | 6,315 | $558K |
| XTX Topco Ltd | 0.01% | Reduce -50.8% | 6,201 | $548K |
| Cwm, LLC | 0.00% | Add +291.2% | 5,809 | $514K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +5.2% | 5,316 | $470K |
| Deutsche Bank AG | 0.00% | Add +13.6% | 5,043 | $446K |
| Alliancebernstein L.P. | 0.00% | Reduce -2.3% | 5,302 | $416K |
| LPL Financial LLC | 0.00% | Reduce -8.7% | 4,553 | $403K |
| Quantinno Capital Management LP | 0.00% | Add +17.9% | 4,318 | $382K |
| Inceptionr LLC | 0.09% | New | 4,078 | $361K |
| Acadian Asset Management LLC | 0.00% | Reduce -60.0% | 3,863 | $341K |
| Engineers Gate Manager LP | 0.00% | Add +24.3% | 3,766 | $333K |
| T. Rowe Price Associates Inc. | 0.00% | Add +15.8% | 3,637 | $322K |
| JPMorgan Chase & Co. | 0.00% | Reduce -10.1% | 3,687 | $314K |
| EntryPoint Capital, LLC | 0.09% | No change | 3,469 | $307K |
| Kings Path Partners LLC | 0.10% | No change | 3,405 | $301K |
| Graham Capital Management, L.P. | 0.01% | Reduce -10.6% | 3,329 | $294K |
| Wealth Enhancement Advisory Services, LLC | 0.00% | New | 3,224 | $294K |
| Squarepoint Ops LLC | 0.00% | Add +16.0% | 3,187 | $282K |
| Mercer Global Advisors Inc. | 0.00% | New | 3,100 | $274K |
| Brooklyn Investment Group | 0.01% | Reduce -18.5% | 2,913 | $257K |
| MetLife Investment Management, LLC | 0.00% | No change | 2,888 | $255K |
| SG Americas Securities, LLC | 0.00% | Reduce -26.1% | 2,667 | $236K |
| State Board of Administration of Florida Retirement System | 0.00% | No change | 2,564 | $227K |
| Man Group plc | 0.00% | Reduce -81.5% | 2,477 | $219K |
| Captrust Financial Advisors | 0.00% | New | 2,361 | $209K |
| New York State Common Retirement Fund | 0.00% | No change | 2,143 | $189K |
| Vanguard Global Advisers, LLC | 0.00% | — | 1,992 | $176K |
| Wells Fargo & Company | 0.00% | Reduce -66.7% | 1,916 | $169K |
| US Bancorp \de | 0.00% | Add +9.3% | 1,461 | $129K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | No change | 1,331 | $118K |
"% of holder's portfolio" is MLAB's weight in each manager's 13F, not the share of Mesa Laboratories Inc. the manager owns.