Mesa LaboratoriesMLAB
13F holders, Q4 2025 (December 31)159holders +18
33new positions
12sold out
8famous investors
$78.50avg. 13F price*
At the end of Q4 2025, 159 institutions reported holding Mesa Laboratories Inc. (MLAB) in their 13F filings, up 18 from Q3 2025. 33 opened new positions and 12 sold out. The largest holders were BlackRock, Inc. ($31.3M), Vanguard Group Inc. ($25.3M) and Long Path Partners LP ($17.8M). 8 famous investors held it, including Paul Tudor Jones (0.0% of Tudor Investment Corporation's portfolio), Mario Gabelli (0.0% of GAMCO Investors'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 Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 33 | $31.0M |
| Exits | 12 | $45.5M |
All 13F filers, Q3 2025 → Q4 2025: 1,019,594 shares bought and 1,079,848 shares sold, net −60,254 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 159 holders
| BlackRock, Inc. | 0.00% | Add +2.5% | 398,666 | $31.3M |
| Vanguard Group Inc. | 0.00% | Add +0.1% | 321,899 | $25.3M |
| Long Path Partners LP | 6.10% | New | 227,223 | $17.8M |
| Boston Partners | 0.02% | Add +86.6% | 213,376 | $16.8M |
| Select Equity Group, L.P. | 0.08% | Add +62.9% | 206,435 | $16.2M |
| Ranger Investment Management, L.P. | 1.11% | Reduce -2.1% | 205,263 | $16.1M |
| Geneva Capital Management LLC | 0.26% | Reduce -6.6% | 178,713 | $14.0M |
| Morgan Stanley | 0.00% | Reduce -31.1% | 175,589 | $13.8M |
| Royce & Associates LP | 0.12% | Add +3.2% | 153,352 | $12.0M |
| Kennedy Capital Management LLC | 0.24% | Add +19.0% | 144,606 | $11.4M |
| Diamond Hill Capital Management, LLC (Investment Advisor) | 0.06% | Add +15.1% | 141,973 | $11.1M |
| Geode Capital Management, LLC | 0.00% | Add +0.1% | 127,950 | $10.0M |
| State Street Corp. | 0.00% | Add +1.4% | 120,641 | $9.5M |
| Janus Henderson Group PLC | 0.00% | Reduce -19.9% | 116,642 | $9.2M |
| Dimensional Fund Advisors LP | 0.00% | Reduce -0.3% | 116,363 | $9.1M |
| Russell Investments Group, Ltd. | 0.01% | Add +17.3% | 116,337 | $9.1M |
| Raymond James Financial Inc. | 0.00% | Add +111.8% | 100,397 | $7.9M |
| Meros Investment Management, LP | 2.65% | Add +11.2% | 85,017 | $6.7M |
| Crawford Investment Counsel Inc. | 0.11% | Reduce -1.5% | 81,220 | $6.4M |
| D. E. Shaw & Co. | 0.00% | Add +133.3% | 76,565 | $6.0M |
| Mason Capital Management LLC | 0.98% | No change | 70,300 | $5.5M |
| AQR Capital Management | 0.00% | Add +114.9% | 70,138 | $5.5M |
| Northern Trust Corp. | 0.00% | Reduce -8.8% | 65,651 | $5.2M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +13.4% | 61,913 | $4.9M |
| Gabelli Funds LLC | 0.03% | Add +12.5% | 60,724 | $4.8M |
| Citadel Advisors | 0.00% | Add +71.2% | 58,521 | $4.6M |
| Jane Street Group, LLC | 0.01% | Add +47.5% | 56,371 | $4.4M |
| Goldman Sachs Group Inc. | 0.00% | Add +32.3% | 55,268 | $4.3M |
| Roubaix Capital, LLC | 1.85% | Reduce -28.0% | 55,189 | $4.3M |
| Bank of America Corp. | 0.00% | Add +16.1% | 54,664 | $4.3M |
| HERALD INVESTMENT MANAGEMENT Ltd | 0.51% | No change | 50,000 | $3.9M |
| Trexquant Investment LP | 0.03% | Add +83.8% | 46,121 | $3.6M |
| Bank of New York Mellon Corp | 0.00% | Add +32.9% | 44,774 | $3.5M |
| Monimus Capital Management, LP | 2.12% | Add +21.0% | 40,842 | $3.2M |
| Jacobs Levy Equity Management, Inc. | 0.01% | Add +907.0% | 38,842 | $3.0M |
| Qube Research & Technologies Ltd | 0.00% | Reduce -8.4% | 28,130 | $2.2M |
| Tudor Investment Corporation | 0.01% | Add +332.5% | 27,426 | $2.2M |
| BBR Partners, LLC | 0.11% | No change | 25,195 | $2.0M |
| Irenic Capital Management LP | 0.27% | New | 25,000 | $2.0M |
| State of Wisconsin Investment Board | 0.00% | Add +22.8% | 22,606 | $1.8M |
| Franklin Resources Inc. | 0.00% | New | 22,074 | $1.7M |
| Segall Bryant & Hamill, LLC | 0.02% | Reduce -0.5% | 18,203 | $1.4M |
| King Luther Capital Management Corp. | 0.01% | Reduce -12.6% | 17,411 | $1.4M |
| Numerai GP LLC | 0.14% | Add +313.0% | 14,909 | $1.2M |
| Principal Financial Group Inc. | 0.00% | Add +48.0% | 14,892 | $1.2M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | New | 14,369 | $1.1M |
| Rice Hall James & Associates, LLC | 0.06% | Reduce -17.1% | 14,217 | $1.1M |
| Public Employees Retirement System of Ohio | 0.00% | No change | 13,722 | $1.1M |
| Quadrature Capital Ltd | 0.01% | New | 13,528 | $1.1M |
| American Century Companies Inc. | 0.00% | Add +5.8% | 13,470 | $1.1M |
| Point72 Asset Management | 0.00% | New | 13,458 | $1.1M |
| Man Group plc | 0.00% | New | 13,387 | $1.1M |
| Invesco Ltd. | 0.00% | Add +11.7% | 12,845 | $1.0M |
| XTX Topco Ltd | 0.03% | New | 12,601 | $989K |
| Creative Planning | 0.00% | Add +42.4% | 12,437 | $976K |
| Two Sigma Investments, LP | 0.00% | Add +27.1% | 12,235 | $960K |
| Gsa Capital Partners LLP | 0.08% | Add +7.9% | 11,614 | $912K |
| Stifel Financial Corp. | 0.00% | Add +11.6% | 11,275 | $885K |
| Nuveen, LLC | 0.00% | No change | 10,078 | $791K |
| Acadian Asset Management LLC | 0.00% | Add +139.1% | 9,665 | $757K |
| BNP Paribas Financial Markets | 0.00% | Add +814.1% | 9,406 | $738K |
| UBS Group AG | 0.00% | Reduce -53.9% | 8,825 | $693K |
| Sei Investments Co. | 0.00% | Add +51.5% | 8,371 | $657K |
| Barclays PLC | 0.00% | Add +6.8% | 8,186 | $643K |
| GAMCO Investors | 0.01% | Reduce -5.6% | 7,754 | $609K |
| Marshall Wace, LLP | 0.00% | Reduce -51.1% | 7,137 | $560K |
| ExodusPoint Capital Management, LP | 0.01% | New | 6,937 | $545K |
| Envestnet Asset Management Inc. | 0.00% | Reduce -58.5% | 6,932 | $544K |
| Rhumbline Advisers | 0.00% | Reduce -12.2% | 6,617 | $519K |
| Arrowstreet Capital, Limited Partnership | 0.00% | New | 6,228 | $489K |
| Dynamic Technology Lab Private Ltd | 0.11% | New | 6,190 | $486K |
| Wells Fargo & Company | 0.00% | Add +11.1% | 5,752 | $452K |
| Royal Bank of Canada | 0.00% | Reduce -79.7% | 5,457 | $429K |
| Alliancebernstein L.P. | 0.00% | No change | 5,424 | $426K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +104.2% | 5,055 | $397K |
| LPL Financial LLC | 0.00% | Reduce -14.3% | 4,984 | $391K |
| Millennium Management | 0.00% | Reduce -96.7% | 4,465 | $351K |
| Aquatic Capital Management LLC | 0.01% | Add +23.2% | 4,446 | $349K |
| Deutsche Bank AG | 0.00% | Add +5.9% | 4,440 | $349K |
| JPMorgan Chase & Co. | 0.00% | Reduce -5.1% | 4,100 | $322K |
| Balyasny Asset Management L.P. | 0.00% | Reduce -4.5% | 3,792 | $298K |
| Graham Capital Management, L.P. | 0.01% | New | 3,723 | $292K |
| Canada Pension Plan Investment Board | 0.00% | New | 3,700 | $290K |
| Quantinno Capital Management LP | 0.00% | New | 3,661 | $287K |
| Brooklyn Investment Group | 0.01% | New | 3,576 | $286K |
| SG Americas Securities, LLC | 0.00% | New | 3,609 | $283K |
| Renaissance Technologies | 0.00% | Reduce -67.9% | 3,500 | $275K |
| EntryPoint Capital, LLC | 0.11% | Reduce -18.3% | 3,469 | $272K |
| Kings Path Partners LLC | 0.09% | No change | 3,405 | $267K |
| Cerity Partners LLC | 0.00% | New | 3,361 | $264K |
| Mariner, LLC | 0.00% | New | 3,313 | $260K |
| T. Rowe Price Associates Inc. | 0.00% | Reduce -23.6% | 3,141 | $247K |
| Engineers Gate Manager LP | 0.00% | New | 3,031 | $238K |
| MetLife Investment Management, LLC | 0.00% | No change | 2,888 | $227K |
| Squarepoint Ops LLC | 0.00% | New | 2,747 | $216K |
| State Board of Administration of Florida Retirement System | 0.00% | New | 2,564 | $201K |
| New York State Common Retirement Fund | 0.00% | No change | 2,143 | $168K |
| AlphaQuest LLC | 0.01% | Reduce -65.2% | 2,116 | $166K |
| Quantbot Technologies LP | 0.01% | Reduce -21.3% | 2,095 | $164K |
| Cwm, LLC | 0.00% | Add +148.7% | 1,485 | $117K |
"% of holder's portfolio" is MLAB's weight in each manager's 13F, not the share of Mesa Laboratories Inc. the manager owns.