Core Laboratories (CLB) Held by Superinvestors
CORE LABORATORIES INC (CLB) is currently held by 3 superinvestors tracked by InsiderSet, with a combined reported market value of approximately $199.58M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Ariel Appreciation Fund is currently the largest disclosed institutional shareholder of CLB tracked by InsiderSet, reporting ownership valued at approximately $163.97M in its June 30, 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 $139.48M, representing an estimated loss of -14.94% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 100% of the total disclosed CLB value among the investors covered in this analysis. Major shareholders include Ariel Appreciation Fund, Disciplined Growth Investors, Renaissance Technologies LLC, and several other long-term asset managers with concentrated positions in CORE LABORATORIES INC (CLB).
This page ranks the largest institutional CLB 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.
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Ariel Appreciation Fund | John W. Rogers Jr. | 1.63% | 14,074,945 | $163,973,109 | $139,482,705 | -$24,490,404 | -14.94% |
| Disciplined Growth Investors | Fred Martin | 0.60% | 3,042,177 | $35,441,362 | $30,147,974 | -$5,293,388 | -14.94% |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 14,500 | $168,925 | $143,695 | -$25,230 | -14.94% |
Frequently asked questions about CLB
Who are the largest superinvestors holding CLB?
The largest superinvestors holding CLB in the latest SEC Form 13F filings include Ariel Appreciation Fund, Disciplined Growth Investors, and Renaissance Technologies LLC. InsiderSet ranks these superinvestors by their latest reported CLB position.
What does the CLB superinvestors page include?
This page tracks CLB positions reported by a curated group of notable institutional investors and fund managers through SEC Form 13F. CORE LABORATORIES INC (CLB) on this page reflects disclosed 13F holdings among those superinvestors, not every institutional shareholder of the stock.
How many superinvestors hold CLB?
InsiderSet currently tracks 3 superinvestors reporting CLB holdings in the latest available 13F data. This is the curated set on this page, not the total number of institutions that own CLB.
How much CLB stock do superinvestors hold?
Superinvestors tracked by InsiderSet disclosed approximately $199.58M in CLB holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value, and it covers the curated superinvestors on this page rather than every institutional filer.
When were CLB superinvestor holdings last updated?
The latest CLB superinvestor holdings on InsiderSet are based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time holdings.
Are superinvestor CLB holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by these superinvestors as of the end of the reporting quarter. A superinvestor may have changed its CLB position after the reporting date.
Are superinvestors buying or selling CLB?
Buying and selling can be analyzed by comparing CLB positions across consecutive 13F reporting periods. InsiderSet's CLB Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View CLB ownership changes.
How have superinvestor CLB holdings changed over time?
InsiderSet tracks CLB holdings among these superinvestors across multiple 13F reporting periods, so holder counts, reported value, and reported shares can be compared over time.