Mesa LaboratoriesMLAB
13F holders, Q2 2026 (June 30)159holders −2
18new positions
18sold out
6famous investors
$99.53avg. 13F price*
At the end of Q2 2026, 159 institutions reported holding Mesa Laboratories Inc. (MLAB) in their 13F filings, down 2 from Q1 2026. 18 opened new positions and 18 sold out. The largest holders were Long Path Partners LP ($47.5M), BlackRock, Inc. ($43.9M) and Boston Partners ($26.4M). 6 famous investors held it, including Mario Gabelli (0.0% of GAMCO Investors's portfolio), Cliff Asness (0.0% of AQR Capital Management's portfolio) and David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio).
- Company
- Mesa Laboratories Inc.
- CUSIP
- 59064R109
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 18 | $17.1M |
| Exits | 18 | $34.9M |
All 13F filers, Q1 2026 → Q2 2026: 848,197 shares bought and 597,760 shares sold, net +250,437 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 159 holders
| Long Path Partners LP | 20.24% | Add +17.6% | 477,126 | $47.5M |
| BlackRock, Inc. | 0.00% | Add +11.9% | 440,552 | $43.9M |
| Boston Partners | 0.02% | Reduce -1.3% | 265,149 | $26.4M |
| Vanguard Capital Management LLC | 0.00% | Add +2.1% | 237,457 | $23.6M |
| AQR Capital Management | 0.01% | Add +19.4% | 203,739 | $20.3M |
| Ranger Investment Management, L.P. | 1.10% | Reduce -14.3% | 173,988 | $17.3M |
| Morgan Stanley | 0.00% | Reduce -3.2% | 156,979 | $15.6M |
| Diamond Hill Capital Management, LLC (Investment Advisor) | 0.12% | Add +0.3% | 155,771 | $15.5M |
| Raymond James Financial Inc. | 0.00% | Add +22.0% | 149,937 | $14.9M |
| Dimensional Fund Advisors LP | 0.00% | Add +19.1% | 148,395 | $14.8M |
| Geode Capital Management, LLC | 0.00% | Add +9.1% | 139,682 | $13.9M |
| Kennedy Capital Management LLC | 0.24% | Reduce -2.8% | 138,301 | $13.8M |
| Jacobs Levy Equity Management, Inc. | 0.05% | Add +194.6% | 130,838 | $13.0M |
| State Street Corp. | 0.00% | Add +1.8% | 124,292 | $12.4M |
| Russell Investments Group, Ltd. | 0.01% | Reduce -9.8% | 121,845 | $12.1M |
| Wasatch Advisors LP | 0.08% | Add +125.8% | 115,668 | $11.5M |
| Royce & Associates LP | 0.09% | Reduce -29.7% | 113,395 | $11.3M |
| Crawford Investment Counsel Inc. | 0.16% | Add +3.4% | 98,805 | $9.8M |
| FMR LLC | 0.00% | Add +1273.4% | 88,857 | $8.8M |
| D. E. Shaw & Co. | 0.01% | Add +49.9% | 81,755 | $8.1M |
| Jane Street Group, LLC | 0.00% | New | 71,580 | $7.1M |
| Vanguard Portfolio Management LLC | 0.00% | Add +31.9% | 69,350 | $6.9M |
| Meros Investment Management, LP | 2.15% | Reduce -0.1% | 67,962 | $6.8M |
| Northern Trust Corp. | 0.00% | Reduce -5.1% | 65,745 | $6.5M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -8.9% | 64,322 | $6.4M |
| Gabelli Funds LLC | 0.04% | No change | 62,499 | $6.2M |
| Monimus Capital Management, LP | 1.40% | Reduce -45.4% | 55,344 | $5.5M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -12.8% | 54,463 | $5.4M |
| Bank of America Corp. | 0.00% | Reduce -13.7% | 49,952 | $5.0M |
| Bank of New York Mellon Corp | 0.00% | Add +3.8% | 45,602 | $4.5M |
| HERALD INVESTMENT MANAGEMENT Ltd | 0.57% | Reduce -15.0% | 42,500 | $4.2M |
| Vanguard Fiduciary Trust Co. | 0.00% | Add +3.1% | 39,536 | $3.9M |
| Qube Research & Technologies Ltd | 0.00% | New | 37,402 | $3.7M |
| Citadel Advisors | 0.00% | Add +326.1% | 35,890 | $3.6M |
| Jupiter Topco LLC | 0.00% | — | 30,996 | $3.1M |
| Two Sigma Investments, LP | 0.00% | Add +78.7% | 29,239 | $2.9M |
| Renaissance Technologies | 0.00% | Reduce -8.5% | 28,900 | $2.9M |
| BBR Partners, LLC | 0.12% | No change | 25,195 | $2.5M |
| Man Group plc | 0.00% | Add +871.7% | 24,070 | $2.4M |
| Point72 Asset Management | 0.00% | Add +38.0% | 22,514 | $2.2M |
| Franklin Resources Inc. | 0.00% | Add +1.6% | 21,905 | $2.2M |
| American Century Companies Inc. | 0.00% | Add +52.3% | 20,364 | $2.0M |
| Rice Hall James & Associates, LLC | 0.09% | Add +33.4% | 18,968 | $1.9M |
| State of Wisconsin Investment Board | 0.00% | Reduce -0.5% | 18,906 | $1.9M |
| Segall Bryant & Hamill, LLC | 0.02% | Reduce -0.4% | 18,108 | $1.8M |
| Numerai GP LLC | 0.14% | Add +62.2% | 17,769 | $1.8M |
| XTX Topco Ltd | 0.02% | Add +181.8% | 17,475 | $1.7M |
| King Luther Capital Management Corp. | 0.01% | No change | 17,411 | $1.7M |
| Creative Planning | 0.00% | Add +10.8% | 16,615 | $1.7M |
| Royal Bank of Canada | 0.00% | Add +11.5% | 14,803 | $1.5M |
| Engineers Gate Manager LP | 0.02% | Add +291.2% | 14,731 | $1.5M |
| Mariner, LLC | 0.00% | Add +60.7% | 14,407 | $1.4M |
| Wells Fargo & Company | 0.00% | Add +650.8% | 14,386 | $1.4M |
| NFJ Investment Group, LLC | 0.05% | New | 14,256 | $1.4M |
| Nuveen, LLC | 0.00% | Add +37.0% | 13,896 | $1.4M |
| Ieq Capital, LLC | 0.01% | Add +40.6% | 13,580 | $1.4M |
| Principal Financial Group Inc. | 0.00% | Add +8.8% | 12,069 | $1.2M |
| Invesco Ltd. | 0.00% | Reduce -15.9% | 11,862 | $1.2M |
| Globeflex Capital L P | 0.15% | Add +6.9% | 11,581 | $1.2M |
| Stifel Financial Corp. | 0.00% | Reduce -1.4% | 11,202 | $1.1M |
| Y-Intercept (Hong Kong) Ltd | 0.02% | Add +58.5% | 10,010 | $996K |
| Envestnet Asset Management Inc. | 0.00% | Add +2.2% | 8,816 | $878K |
| Marshall Wace, LLP | 0.00% | New | 8,740 | $870K |
| CM Wealth Advisors LLC | 0.15% | New | 8,341 | $830K |
| GAMCO Investors | 0.01% | Add +6.5% | 8,340 | $830K |
| UBS Group AG | 0.00% | Reduce -35.5% | 7,773 | $774K |
| CenterBook Partners LP | 0.04% | Reduce -45.5% | 7,739 | $770K |
| Quadrature Capital Ltd | 0.01% | Reduce -11.6% | 7,682 | $765K |
| Vident Advisory, LLC | 0.01% | No change | 7,608 | $757K |
| Cerity Partners LLC | 0.00% | Add +2.3% | 7,413 | $738K |
| Los Angeles Capital Management LLC | 0.00% | Add +21629.4% | 7,388 | $735K |
| Quantinno Capital Management LP | 0.00% | Add +63.7% | 7,067 | $704K |
| Sei Investments Co. | 0.00% | Reduce -8.7% | 6,759 | $673K |
| Mercer Global Advisors Inc. | 0.00% | Add +117.9% | 6,756 | $673K |
| Rhumbline Advisers | 0.00% | Add +0.2% | 6,560 | $653K |
| Canada Pension Plan Investment Board | 0.00% | Reduce -7.3% | 6,300 | $627K |
| LPL Financial LLC | 0.00% | Add +32.8% | 6,044 | $602K |
| Alliancebernstein L.P. | 0.00% | Add +22.6% | 6,500 | $575K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +5.5% | 5,607 | $558K |
| State Board of Administration of Florida Retirement System | 0.00% | Add +112.4% | 5,445 | $542K |
| Deutsche Bank AG | 0.00% | Add +6.7% | 5,380 | $536K |
| Brevan Howard Capital Management LP | 0.01% | New | 4,489 | $447K |
| T. Rowe Price Associates Inc. | 0.00% | Add +20.8% | 4,393 | $438K |
| Magnetar Financial LLC | 0.00% | New | 4,139 | $412K |
| Wealth Enhancement Advisory Services, LLC | 0.00% | Add +32.6% | 4,275 | $409K |
| JPMorgan Chase & Co. | 0.00% | Add +7.1% | 3,949 | $393K |
| STRS Ohio | 0.00% | New | 3,700 | $368K |
| Seizert Capital Partners, LLC | 0.01% | New | 3,446 | $343K |
| Captrust Financial Advisors | 0.00% | Add +38.6% | 3,273 | $326K |
| Prelude Capital Management, LLC | 0.02% | New | 3,141 | $313K |
| MetLife Investment Management, LLC | 0.00% | Add +7.1% | 3,094 | $308K |
| Dynamic Technology Lab Private Ltd | 0.07% | New | 2,921 | $291K |
| Graham Capital Management, L.P. | 0.01% | Reduce -14.1% | 2,859 | $285K |
| Integrated Quantitative Investments LLC | 0.04% | New | 2,590 | $258K |
| Citigroup Inc. | 0.00% | Add +574.7% | 2,510 | $250K |
| Kings Path Partners LLC | 0.06% | Reduce -28.6% | 2,433 | $242K |
| Corient Private Wealth LP | 0.00% | New | 2,423 | $241K |
| Topline Capital Management, LLC | 0.06% | New | 2,374 | $236K |
| Baird Financial Group, Inc. | 0.00% | New | 2,325 | $231K |
| New York State Common Retirement Fund | 0.00% | No change | 2,143 | $213K |
| Vanguard Global Advisers, LLC | 0.00% | No change | 1,992 | $198K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | Add +35.7% | 1,806 | $180K |
| Arax Advisory Partners | 0.00% | Add +99.3% | 1,455 | $145K |
| US Bancorp \de | 0.00% | Reduce -16.4% | 1,221 | $122K |
| Public Employees Retirement Association of Colorado | 0.00% | No change | 1,181 | $118K |
| Smartleaf Asset Management LLC | 0.00% | No change | 1,143 | $114K |
| BNP Paribas Financial Markets | 0.00% | Reduce -15.3% | 989 | $98K |
| Asset Dedication, LLC | 0.01% | No change | 830 | $83K |
| Barclays PLC | 0.00% | Reduce -17.3% | 829 | $83K |
| Geneos Wealth Management Inc. | 0.00% | No change | 728 | $72K |
| Huntington National Bank | 0.00% | Reduce -16.9% | 560 | $56K |
| Allworth Financial LP | 0.00% | Add +110.0% | 523 | $52K |
| Legal & General Group Plc | 0.00% | Add +10.9% | 520 | $52K |
| Ameritas Investment Partners, Inc. | 0.00% | No change | 509 | $51K |
| SRH Advisors, LLC | 0.01% | No change | 500 | $50K |
| Farther Finance Advisors, LLC | 0.00% | Reduce -12.2% | 412 | $41K |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -20.0% | 385 | $38K |
| PNC Financial Services Group, Inc. | 0.00% | Add +17.3% | 298 | $30K |
| State of Alaska, Department of Revenue | 0.00% | No change | 278 | $27K |
| Global Retirement Partners, LLC | 0.00% | — | 259 | $26K |
| Rockefeller Capital Management L.P. | 0.00% | Add +77.3% | 234 | $23K |
| Hilltop National Bank | 0.00% | No change | 200 | $20K |
| GAMMA Investing LLC | 0.00% | No change | 198 | $20K |
| EverSource Wealth Advisors, LLC | 0.00% | Add +46.1% | 171 | $17K |
| Versant Capital Management, Inc | 0.00% | Add +6.9% | 139 | $14K |
| Steward Partners Investment Advisory, LLC | 0.00% | Add +17.1% | 137 | $14K |
| Rothschild Investment LLC | 0.00% | Add +15.6% | 126 | $13K |
| Millstone Evans Group, LLC | 0.01% | No change | 120 | $12K |
| Nisa Investment Advisors, LLC | 0.00% | Reduce -20.1% | 119 | $12K |
| Bessemer Group Inc. | 0.00% | Add +150.0% | 105 | $10K |
| Covestor Ltd | 0.01% | Reduce -14.8% | 98 | $9K |
| Harbour Investments, Inc. | 0.00% | Add +1.2% | 83 | $8K |
| Essential Partners LLC | 0.00% | Reduce -40.3% | 74 | $7K |
| California State Teachers Retirement System | 0.00% | Reduce -73.9% | 74 | $7K |
| Quantbot Technologies LP | 0.00% | Reduce -84.3% | 64 | $6K |
| Hantz Financial Services, Inc. | 0.00% | No change | 49 | $5K |
| True Wealth Design, LLC | 0.00% | Add +66.7% | 40 | $4K |
| Osaic Holdings, Inc. | 0.00% | Add +178.6% | 39 | $4K |
| Fifth Third Bancorp | 0.00% | Add +650.0% | 30 | $3K |
| Optiver Holding B.V. | 0.00% | Reduce -9.4% | 29 | $3K |
| Parallel Advisors, LLC | 0.00% | No change | 27 | $3K |
| Basecamp Wealth Advisors LLC | 0.00% | Add +360.0% | 23 | $2K |
| SJS Investment Consulting Inc. | 0.00% | Add +15.0% | 23 | $2K |
| Wealth Enhancement Trust Services, Inc. | 0.00% | New | 20 | $2K |
| Quarry LP | 0.00% | New | 19 | $2K |
| Sterling Capital Management LLC | 0.00% | Reduce -44.1% | 19 | $2K |
| Larson Financial Group LLC | 0.00% | No change | 17 | $2K |
| IFP Advisors, Inc | 0.00% | Add +87.5% | 15 | $1K |
| Clearstead Advisors, LLC | 0.00% | New | 13 | $1K |
| Jones Financial Companies LLLP | 0.00% | No change | 11 | $1K |
| Cedar Mountain Advisors, LLC | 0.00% | No change | 10 | $996 |
| Parkside Financial Bank & Trust | 0.00% | No change | 10 | $996 |
| Cornerstone Financial Management LLC | 0.00% | No change | 7 | $697 |
| Signaturefd, LLC | 0.00% | No change | 6 | $597 |
| Salomon & Ludwin, LLC | 0.00% | No change | 4 | $418 |
| JPL Wealth Management, LLC | 0.00% | Add +100.0% | 4 | $399 |
| Gilpin Wealth Management, LLC | 0.00% | No change | 1 | $100 |
| Transamerica Financial Advisors, LLC | 0.00% | No change | 1 | $99 |
| Bruce G. Allen Investments, LLC | 0.00% | No change | 1 | $52 |
"% of holder's portfolio" is MLAB's weight in each manager's 13F, not the share of Mesa Laboratories Inc. the manager owns.