MESA LABORATORIES INC (MLAB) Top Institutional Shareholders
MESA LABORATORIES INC (MLAB) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $422.55M in MLAB holdings during the latest filing period.
Long Path Partners Lp is currently the largest disclosed institutional shareholder of MLAB tracked by InsiderSet, reporting ownership valued at approximately $35.86M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $38.51M, representing an estimated gain of +7.39% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 50% of the total disclosed MLAB value among the investors covered in this analysis. Major shareholders include Long Path Partners Lp, Blackrock, Inc., Boston Partners, and several other long-term asset managers with concentrated positions in MESA LABORATORIES INC (MLAB).
This page ranks the largest institutional MLAB shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
155
Total Reported Value
$422.55M
Largest Holder
Long Path Partners Lp
Largest Position
$35.86M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
176
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Long Path Partners Lp | 16.29% | 405,583 | $35,861,649 | $38,510,106 | +$2,648,457 | +7.39% | |
| Blackrock, Inc. | 0.00% | 393,851 | $34,824,305 | $37,396,152 | +$2,571,847 | +7.39% | |
| Boston Partners | 0.02% | 268,711 | $23,762,126 | $25,514,109 | +$1,751,983 | +7.37% | |
| Select Equity Group, L.P. | 0.11% | 235,885 | $20,856,952 | $22,397,281 | +$1,540,329 | +7.39% | |
| Vanguard Capital Management Llc | 0.00% | 232,643 | $20,570,294 | $22,089,453 | +$1,519,159 | +7.39% | |
| Ranger Investment Management, L.P. | 1.30% | 202,903 | $17,940,683 | $19,265,640 | +$1,324,957 | +7.39% | |
| Aqr Capital Management Llc | 0.01% | 170,562 | $15,081,098 | $16,194,862 | +$1,113,764 | +7.39% | |
| Morgan Stanley | 0.00% | 162,116 | $14,334,351 | $15,392,914 | +$1,058,563 | +7.38% | |
| Royce & Associates Lp | 0.14% | 161,229 | $14,255,868 | $15,308,694 | +$1,052,826 | +7.39% | |
| Diamond Hill Capital Management Inc | 0.09% | 155,302 | $13,731,803 | $14,745,925 | +$1,014,122 | +7.39% | |
| Kennedy Capital Management Llc | 0.27% | 142,343 | $12,585,968 | $13,515,468 | +$929,500 | +7.39% | |
| Russell Investments Group, Ltd. | 0.01% | 135,069 | $11,942,874 | $12,824,802 | +$881,928 | +7.38% | |
| Geode Capital Management, Llc | 0.00% | 128,002 | $11,321,083 | $12,153,790 | +$832,707 | +7.36% | |
| Dimensional Fund Advisors Lp | 0.00% | 124,630 | $11,017,953 | $11,833,619 | +$815,666 | +7.40% | |
| State Street Corp | 0.00% | 122,068 | $10,793,253 | $11,590,357 | +$797,104 | +7.39% | |
| Raymond James Financial Inc | 0.00% | 122,911 | $10,691,384 | $11,670,399 | +$979,015 | +9.16% | |
| Monimus Capital Management, Lp | 2.48% | 101,292 | $8,956,239 | $9,617,675 | +$661,436 | +7.39% | |
| Crawford Investment Counsel Inc | 0.14% | 95,535 | $8,447,205 | $9,071,048 | +$623,843 | +7.39% | |
| Roubaix Capital, Llc | 2.98% | 72,115 | $6,376,408 | $6,847,319 | +$470,911 | +7.39% | |
| Goldman Sachs Group Inc | 0.00% | 70,617 | $6,243,956 | $6,705,084 | +$461,128 | +7.39% | |
| Janus Henderson Group Plc | 0.00% | 69,401 | $6,136,436 | $6,589,625 | +$453,189 | +7.39% | |
| Northern Trust Corp | 0.00% | 69,264 | $6,124,324 | $6,576,617 | +$452,293 | +7.39% | |
| Meros Investment Management, Lp | 2.61% | 68,032 | $6,015,389 | $6,459,638 | +$444,249 | +7.39% | |
| Gabelli Funds Llc | 0.04% | 62,499 | $5,526,162 | $5,934,280 | +$408,118 | +7.39% | |
| Charles Schwab Investment Management Inc | 0.00% | 62,424 | $5,519,530 | $5,927,159 | +$407,629 | +7.39% | |
| Bank Of America Corp | 0.00% | 57,871 | $5,116,954 | $5,494,851 | +$377,897 | +7.39% | |
| D. E. Shaw & Co., Inc. | 0.00% | 54,558 | $4,824,018 | $5,180,282 | +$356,264 | +7.39% | |
| Vanguard Portfolio Management Llc | 0.00% | 52,586 | $4,649,654 | $4,993,041 | +$343,387 | +7.39% | |
| Wasatch Advisors Lp | 0.03% | 51,233 | $4,530,022 | $4,864,573 | +$334,551 | +7.39% | |
| Herald Investment Management Ltd | 0.61% | 50,000 | $4,395,000 | $4,747,500 | +$352,500 | +8.02% | |
| Jacobs Levy Equity Management, Inc | 0.02% | 44,417 | $3,927,351 | $4,217,394 | +$290,043 | +7.39% | |
| Bank Of New York Mellon Corp | 0.00% | 43,937 | $3,884,867 | $4,171,818 | +$286,951 | +7.39% | |
| Vanguard Fiduciary Trust Co | 0.00% | 38,337 | $3,389,758 | $3,640,098 | +$250,340 | +7.39% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 31,600 | $2,794,072 | $3,000,420 | +$206,348 | +7.39% |
| Franklin Resources Inc | 0.00% | 21,553 | $1,905,716 | $2,046,457 | +$140,741 | +7.39% | |
| Lazard Asset Management Llc | 0.00% | 20,328 | $1,797,402 | $1,930,144 | +$132,742 | +7.39% | |
| State Of Wisconsin Investment Board | 0.00% | 19,006 | $1,680,511 | $1,804,620 | +$124,109 | +7.39% | |
| Trexquant Investment Lp | 0.01% | 18,661 | $1,650,006 | $1,771,862 | +$121,856 | +7.39% | |
| King Luther Capital Management Corp | 0.01% | 17,411 | $1,539,481 | $1,653,174 | +$113,693 | +7.39% | |
| Segall Bryant & Hamill, Llc | 0.02% | 18,174 | $1,464,825 | $1,725,621 | +$260,796 | +17.80% | |
| Two Sigma Investments, Lp | 0.00% | 16,359 | $1,446,463 | $1,553,287 | +$106,824 | +7.39% | |
| Point72 Asset Management, L.P. | 0.00% | 16,309 | $1,442,042 | $1,548,540 | +$106,498 | +7.39% | |
| Creative Planning | 0.00% | 14,994 | $1,325,769 | $1,423,680 | +$97,911 | +7.39% | |
| Rice Hall James & Associates, Llc | 0.07% | 14,222 | $1,257,509 | $1,350,379 | +$92,870 | +7.39% | |
| Centerbook Partners Lp | 0.07% | 14,194 | $1,255,033 | $1,347,720 | +$92,687 | +7.39% | |
| Invesco Ltd. | 0.00% | 14,103 | $1,246,988 | $1,339,080 | +$92,092 | +7.39% | |
| Public Employees Retirement System Of Ohio | 0.00% | 13,722 | $1,213,299 | $1,302,904 | +$89,605 | +7.39% | |
| American Century Companies Inc | 0.00% | 13,373 | $1,182,441 | $1,269,766 | +$87,325 | +7.39% | |
| Royal Bank Of Canada | 0.00% | 13,275 | $1,173,000 | $1,260,461 | +$87,461 | +7.46% | |
| Ubs Group Ag | 0.00% | 12,046 | $1,065,107 | $1,143,768 | +$78,661 | +7.39% |
Frequently asked questions about MLAB
Who owns the most MLAB stock?
The largest holders of MLAB are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for MESA LABORATORIES INC (MLAB).
Is MLAB widely held by superinvestors?
Many widely followed stocks like MLAB appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly MLAB is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.