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.

Explore more:

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q4 2025Renaissance Technologies LLCSell-7,4003,500$274,750
Q3 2025Renaissance Technologies LLCSell-57,12710,900$730,409
Q2 2025Renaissance Technologies LLCBuy59,82768,027$6,409,504
Q1 2025Renaissance Technologies LLCBuy7008,200$973,012
Q4 2024Renaissance Technologies LLCSell-5,9007,500$989,025
Q3 2024Renaissance Technologies LLCBuy11,00013,400$1,740,124
Q2 2024Renaissance Technologies LLCSell-13,7002,400$208,248
Q2 2024Sequoia Financial AdvisorsBuy3,6773,677$319,054
Q1 2024Renaissance Technologies LLCSell-14,30016,100$1,767
Q4 2023Renaissance Technologies LLCBuy21,60030,400$3,185
Q3 2023Renaissance Technologies LLCSell-14,2008,800$925
Q2 2023Renaissance Technologies LLCBuy13,30023,000$2,956
Q1 2023Renaissance Technologies LLCSell-8,2349,700$1,695
Q4 2022Renaissance Technologies LLCBuy9,73417,934$2,981
Q3 2022Renaissance Technologies LLCSell-4,9008,200$1,155
Q1 2022Renaissance Technologies LLCSell-2,78213,100$3,339
Q4 2021Renaissance Technologies LLCSell-11,21815,882$5,211
Q3 2021Renaissance Technologies LLCBuy3,40027,100$8,194
Q2 2021Renaissance Technologies LLCBuy11,80023,700$6,427
Q1 2021Renaissance Technologies LLCSell-2,20011,900$2,898
Q4 2020Renaissance Technologies LLCSell-28,00014,100$4,042
Q3 2020Renaissance Technologies LLCSell-7,00042,100$10,725
Q2 2020Renaissance Technologies LLCBuy15,20049,100$10,645
Q1 2020Renaissance Technologies LLCSell-32,00033,900$7,664
Q4 2019Renaissance Technologies LLCSell-14,60065,900$16,435
Q3 2019Renaissance Technologies LLCBuy33,70080,500$19,140
Q2 2019Renaissance Technologies LLCSell-7,10046,800$11,435
Q1 2019Renaissance Technologies LLCSell-8,40053,900$12,424
Q4 2018Renaissance Technologies LLCSell-40062,300$12,983
Q3 2018Renaissance Technologies LLCSell-11,30062,700$11,638

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.