MESA LABORATORIES INC (MLAB) Institutional Buying Activity
Institutional investors tracked by InsiderSet increased exposure to MESA LABORATORIES INC (MLAB) during the quarter ended March 31, 2026 through a combination of new purchases and expanded existing positions disclosed in SEC Form 13F filings.
The largest institutional buyer of MLAB during the latest reporting period was Renaissance Technologies LLC, which increased its reported MLAB position by approximately $5.64M based on quarter-end filing values. Several additional hedge funds and long-term asset managers also reported meaningful increases in MLAB exposure during the quarter.
Institutional buying activity can provide insight into investor conviction, sector allocation trends, and smart money positioning toward MESA LABORATORIES INC (MLAB). InsiderSet tracks quarterly accumulation trends, new institutional positions, ownership increases, and estimated performance of newly disclosed holdings using SEC filing data and recent market prices.
The investors highlighted on this page collectively added approximately $10.00M in reported MLAB exposure during the latest filing period, reflecting continued institutional interest in MESA LABORATORIES INC's growth initiatives and strategic positioning.
| Portfolio quarter | Name | Type | Quantity | Remaining | Reported stock balance |
|---|---|---|---|---|---|
| Q1 2026 | Renaissance Technologies LLC | Buy | 28,100 | 31,600 | $2,794,072 |
| Q2 2025 | Renaissance Technologies LLC | Buy | 59,827 | 68,027 | $6,409,504 |
| Q1 2025 | Renaissance Technologies LLC | Buy | 700 | 8,200 | $973,012 |
| Q3 2024 | Renaissance Technologies LLC | Buy | 11,000 | 13,400 | $1,740,124 |
| Q2 2024 | Sequoia Financial Advisors | Buy | 3,677 | 3,677 | $319,054 |
| Q4 2023 | Renaissance Technologies LLC | Buy | 21,600 | 30,400 | $3,185 |
| Q2 2023 | Renaissance Technologies LLC | Buy | 13,300 | 23,000 | $2,956 |
| Q4 2022 | Renaissance Technologies LLC | Buy | 9,734 | 17,934 | $2,981 |
| Q3 2021 | Renaissance Technologies LLC | Buy | 3,400 | 27,100 | $8,194 |
| Q2 2021 | Renaissance Technologies LLC | Buy | 11,800 | 23,700 | $6,427 |
| Q2 2020 | Renaissance Technologies LLC | Buy | 15,200 | 49,100 | $10,645 |
| Q3 2019 | Renaissance Technologies LLC | Buy | 33,700 | 80,500 | $19,140 |
| Q2 2017 | Renaissance Technologies LLC | Buy | 7,771 | 87,271 | $12,507 |
| Q4 2015 | Renaissance Technologies LLC | Buy | 4,199 | 138,599 | $13,791 |
| Q3 2015 | Renaissance Technologies LLC | Buy | 207 | 134,400 | $14,972 |
| Q3 2014 | Renaissance Technologies LLC | Buy | 7,200 | 167,800 | $9,695 |
| Q2 2014 | Bares Capital Management | Buy | 41,436 | 161,758 | $13,581 |
| Q2 2014 | Renaissance Technologies LLC | Buy | 26,457 | 160,600 | $13,484 |
| Q1 2014 | Bares Capital Management | Buy | 120,322 | 120,322 | $10,859 |
| Q1 2014 | Renaissance Technologies LLC | Buy | 7,955 | 134,143 | $12,106 |
| Q4 2013 | Renaissance Technologies LLC | Buy | 14,988 | 126,188 | $9,916 |
| Q3 2013 | Renaissance Technologies LLC | Buy | 22,000 | 111,200 | $7,518 |
| Q2 2013 | Renaissance Technologies LLC | Buy | 89,200 | 89,200 | $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.