MESA LABORATORIES INC (MLAB) Stock Institutional Trading Activity


MESA LABORATORIES INC (MLAB) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Renaissance Technologies LLC, Sequoia Financial Advisors, and Bares Capital Management. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2018Renaissance Technologies LLCSell-4,60074,000$10,985
Q4 2017Renaissance Technologies LLCSell-5,60078,600$9,770
Q3 2017Renaissance Technologies LLCSell-3,07184,200$12,573
Q2 2017Renaissance Technologies LLCBuy7,77187,271$12,507
Q1 2017Renaissance Technologies LLCSell-3,80079,500$9,755
Q4 2016Renaissance Technologies LLCSell-10,85983,300$10,225
Q3 2016Renaissance Technologies LLCSell-7,44194,159$10,768
Q2 2016Renaissance Technologies LLCSell-34,800101,600$12,497
Q1 2016Renaissance Technologies LLCSell-2,199136,400$13,142
Q4 2015Renaissance Technologies LLCBuy4,199138,599$13,791
Q3 2015Renaissance Technologies LLCBuy207134,400$14,972
Q2 2015Renaissance Technologies LLCSell-5,907134,193$11,930
Q1 2015Renaissance Technologies LLCSell-7,124140,100$10,115
Q4 2014Renaissance Technologies LLCSell-20,576147,224$11,382
Q3 2014Renaissance Technologies LLCBuy7,200167,800$9,695
Q2 2014Bares Capital ManagementBuy41,436161,758$13,581
Q2 2014Renaissance Technologies LLCBuy26,457160,600$13,484
Q1 2014Bares Capital ManagementBuy120,322120,322$10,859
Q1 2014Renaissance Technologies LLCBuy7,955134,143$12,106
Q4 2013Renaissance Technologies LLCBuy14,988126,188$9,916
Q3 2013Renaissance Technologies LLCBuy22,000111,200$7,518
Q2 2013Renaissance Technologies LLCBuy89,20089,200$4,828

Frequently asked questions about MLAB activity

  • Which institutional owners are buying MLAB?

    Institutional owners buying MLAB include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in MLAB activity?

    "Buy" means an investor increased their reported position in MLAB compared to the prior reporting period. This reflects growing exposure to MESA LABORATORIES INC (MLAB) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in MLAB increasing?

    Institutional interest in MLAB can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.