CORE LABORATORIES INC (CLB) Institutional Buying Activity
Institutional investors tracked by InsiderSet increased exposure to CORE LABORATORIES INC (CLB) 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 CLB during the latest reporting period was Ariel Appreciation Fund, which increased its reported CLB position by approximately $223.94M based on quarter-end filing values. Several additional hedge funds and long-term asset managers also reported meaningful increases in CLB exposure during the quarter.
Institutional buying activity can provide insight into investor conviction, sector allocation trends, and smart money positioning toward CORE LABORATORIES INC (CLB). 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 $430.10M in reported CLB exposure during the latest filing period, reflecting continued institutional interest in CORE LABORATORIES INC's growth initiatives and strategic positioning.
| Portfolio quarter | Name | Type | Quantity | Remaining | Reported stock balance |
|---|---|---|---|---|---|
| Q4 2025 | Renaissance Technologies LLC | Buy | 149,219 | 183,400 | $2,939,902 |
| Q3 2025 | Ariel Appreciation Fund | Buy | 797,105 | 13,773,568 | $170,241,300 |
| Q3 2025 | Disciplined Growth Investors | Buy | 528,976 | 5,969,860 | $73,787,470 |
| Q3 2025 | Renaissance Technologies LLC | Buy | 6,581 | 34,181 | $422,477 |
| Q2 2025 | Ariel Appreciation Fund | Buy | 2,634,438 | 12,976,463 | $149,488,854 |
| Q1 2025 | Ariel Appreciation Fund | Buy | 709,455 | 10,342,025 | $155,026,955 |
| Q3 2024 | Disciplined Growth Investors | Buy | 1,192,871 | 5,653,591 | $104,761,041 |
| Q2 2024 | Disciplined Growth Investors | Buy | 3,644,963 | 4,460,720 | $90,508,009 |
| Q1 2024 | Ariel Appreciation Fund | Buy | 1,837,258 | 10,825,657 | $184,902,222 |
| Q1 2024 | Disciplined Growth Investors | Buy | 63,390 | 815,757 | $13,933,130 |
| Q1 2024 | Renaissance Technologies LLC | Buy | 46,300 | 46,300 | $791 |
| Q4 2023 | Disciplined Growth Investors | Buy | 13,983 | 752,367 | $13,286,801 |
| Q2 2023 | Ariel Appreciation Fund | Buy | 9,631,723 | 9,631,723 | $223,937,560 |
| Q1 2023 | Disciplined Growth Investors | Buy | 795,484 | 795,484 | $17,540,422 |
Frequently asked questions about CLB activity
Which institutional owners are buying CLB?
Institutional owners buying CLB 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 CLB activity?
"Buy" means an investor increased their reported position in CLB compared to the prior reporting period. This reflects growing exposure to CORE LABORATORIES INC (CLB) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in CLB increasing?
Institutional interest in CLB 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.