CLB Institutional Ownership & Shareholders
CORE LABORATORIES INC (CLB) is currently held by 175 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $591.45M 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 $143.42M, representing an estimated loss of -12.53% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 72% of the total disclosed CLB value among the investors covered in this analysis. Major shareholders include Ariel Appreciation Fund, Blackrock, Inc., Disciplined Growth Investors, 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.
Institutional Holders
175
Total Reported Value
$591.45M
Largest Holder
Ariel Appreciation Fund
Largest Position
$163.97M
Insider Transactions (90d)
4
Latest Filing Quarter
Q2 2026
New Institutional Positions
52
Funds Exiting Positions
0
| 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 | $143,423,690 | -$20,549,419 | -12.53% |
| Blackrock, Inc. | 0.00% | 7,460,118 | $86,910,369 | $76,018,602 | -$10,891,767 | -12.53% | |
| Disciplined Growth Investors | Fred Martin | 0.60% | 3,042,177 | $35,441,362 | $30,999,784 | -$4,441,578 | -12.53% |
| Earnest Partners Llc | 0.12% | 2,941,004 | $34,262,697 | $29,968,831 | -$4,293,866 | -12.53% | |
| State Street Corp | 0.00% | 2,176,480 | $25,355,992 | $22,178,331 | -$3,177,661 | -12.53% | |
| Vanguard Capital Management Llc | 0.00% | 1,590,521 | $18,529,570 | $16,207,409 | -$2,322,161 | -12.53% | |
| Dimensional Fund Advisors Lp | 0.00% | 1,548,203 | $18,033,152 | $15,776,189 | -$2,256,963 | -12.52% | |
| Schroder Investment Management Group | 0.01% | 1,543,638 | $16,856,527 | $15,729,671 | -$1,126,856 | -6.68% | |
| Vanguard Portfolio Management Llc | 0.00% | 1,275,421 | $14,858,655 | $12,996,540 | -$1,862,115 | -12.53% | |
| Geode Capital Management, Llc | 0.00% | 1,193,824 | $13,911,319 | $12,165,067 | -$1,746,252 | -12.55% | |
| Gendell Jeffrey L | 0.11% | 1,090,973 | $12,709,835 | $11,117,015 | -$1,592,820 | -12.53% | |
| Heartland Advisors Inc | 0.55% | 1,058,311 | $12,329,323 | $10,784,189 | -$1,545,134 | -12.53% | |
| Goldman Sachs Group Inc | 0.00% | 751,643 | $8,756,641 | $7,659,242 | -$1,097,399 | -12.53% | |
| Morgan Stanley | 0.00% | 656,146 | $7,644,131 | $6,686,128 | -$958,003 | -12.53% | |
| Northern Trust Corp | 0.00% | 608,202 | $7,085,554 | $6,197,578 | -$887,976 | -12.53% | |
| Charles Schwab Investment Management Inc | 0.00% | 565,065 | $6,583,007 | $5,758,012 | -$824,995 | -12.53% | |
| Evergreen Capital Management Llc | 0.11% | 669,221 | $6,491,444 | $6,819,362 | +$327,918 | +5.05% | |
| T. Rowe Price Investment Management, Inc. | 0.00% | 485,032 | $5,651,000 | $4,942,476 | -$708,524 | -12.54% | |
| Ubs Group Ag | 0.00% | 461,777 | $5,379,702 | $4,705,508 | -$674,194 | -12.53% | |
| Fisher Asset Management, Llc | 0.00% | 447,949 | $5,218,605 | $4,564,600 | -$654,005 | -12.53% | |
| Bank Of New York Mellon Corp | 0.00% | 401,283 | $4,674,946 | $4,089,074 | -$585,872 | -12.53% | |
| Van Eck Associates Corp | 0.00% | 393,682 | $4,586,395 | $4,011,620 | -$574,775 | -12.53% | |
| Citadel Advisors Llc | 0.00% | 371,615 | $4,329,315 | $3,786,757 | -$542,558 | -12.53% | |
| Vanguard Fiduciary Trust Co | 0.00% | 296,584 | $3,455,204 | $3,022,191 | -$433,013 | -12.53% | |
| Mac Alpha Capital Management, Lp | 1.44% | 262,894 | $3,062,961 | $2,678,890 | -$384,071 | -12.54% | |
| D. E. Shaw & Co., Inc. | 0.00% | 248,070 | $2,890,016 | $2,527,833 | -$362,183 | -12.53% | |
| Advisors Capital Management, Llc | 0.03% | 237,398 | $2,765,687 | $2,419,086 | -$346,601 | -12.53% | |
| Hotchkis & Wiley Capital Management Llc | 0.01% | 235,015 | $2,737,925 | $2,394,803 | -$343,122 | -12.53% | |
| Creative Planning | 0.00% | 279,479 | $2,710,947 | $2,847,891 | +$136,944 | +5.05% | |
| Envestnet Asset Management Inc | 0.00% | 227,236 | $2,647,304 | $2,315,535 | -$331,769 | -12.53% | |
| Invesco Ltd. | 0.00% | 202,140 | $2,354,931 | $2,059,807 | -$295,124 | -12.53% | |
| Russell Investments Group, Ltd. | 0.00% | 193,517 | $2,254,481 | $1,971,938 | -$282,543 | -12.53% | |
| Nuveen, Llc | 0.00% | 181,278 | $2,111,889 | $1,847,223 | -$264,666 | -12.53% | |
| Archon Capital Management Llc | 0.85% | 178,700 | $2,081,855 | $1,820,953 | -$260,902 | -12.53% | |
| Public Sector Pension Investment Board | 0.00% | 158,395 | $1,845,302 | $1,614,045 | -$231,257 | -12.53% | |
| Wells Fargo & Company/Mn | 0.00% | 158,391 | $1,845,258 | $1,614,004 | -$231,254 | -12.53% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.00% | 96,902 | $1,626,983 | $987,431 | -$639,552 | -39.31% | |
| Cwa Asset Management Group, Llc | 0.05% | 166,449 | $1,614,551 | $1,696,115 | +$81,564 | +5.05% | |
| Legal & General Group Plc | 0.00% | 122,575 | $1,427,407 | $1,249,039 | -$178,368 | -12.50% | |
| Jump Financial, Llc | 0.01% | 120,051 | $1,398,594 | $1,223,320 | -$175,274 | -12.53% | |
| Rhumbline Advisers | 0.00% | 114,672 | $1,335,913 | $1,168,508 | -$167,405 | -12.53% | |
| Rice Hall James & Associates, Llc | 0.06% | 101,648 | $1,184,199 | $1,035,793 | -$148,406 | -12.53% | |
| Ameriprise Financial Inc | 0.00% | 98,959 | $1,152,872 | $1,008,392 | -$144,480 | -12.53% | |
| American Century Companies Inc | 0.00% | 94,701 | $1,103,267 | $965,003 | -$138,264 | -12.53% | |
| Swiss National Bank | 0.00% | 92,500 | $1,077,625 | $942,575 | -$135,050 | -12.53% | |
| Bank Of America Corp | 0.00% | 87,285 | $1,016,870 | $889,434 | -$127,436 | -12.53% | |
| Xtx Topco Ltd | 0.01% | 85,331 | $994,106 | $869,523 | -$124,583 | -12.53% | |
| Price T Rowe Associates Inc | 0.00% | 84,194 | $981,000 | $857,937 | -$123,063 | -12.54% | |
| Tidal Investments Llc | 0.00% | 80,853 | $941,937 | $823,892 | -$118,045 | -12.53% | |
| Citigroup Inc | 0.00% | 73,484 | $856,089 | $748,802 | -$107,287 | -12.53% |
Frequently asked questions about CLB
Who are the largest institutional holders of CLB?
The largest institutional holders of CLB reported in the latest SEC Form 13F filings include Ariel Appreciation Fund, Blackrock, Inc., Disciplined Growth Investors, Earnest Partners Llc, and State Street Corp. InsiderSet ranks institutional holders by their latest reported CLB position.
What is CLB institutional ownership?
This page tracks CLB positions reported by institutional investment managers through SEC Form 13F. CORE LABORATORIES INC (CLB) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own CLB?
InsiderSet currently tracks 175 institutional managers reporting CLB holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of CLB shareholders.
How much CLB stock do institutions own?
Institutional investment managers disclosed approximately $591.45M in CLB holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was CLB institutional ownership last updated?
The latest CLB institutional ownership data on InsiderSet is 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 institutional holdings.
Are institutional CLB holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its CLB position after the reporting date.
Are institutions buying or selling CLB?
Institutional 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 has CLB institutional ownership changed over time?
InsiderSet tracks CLB institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.