CORE LABORATORIES INC (CLB) Top Institutional Shareholders
CORE LABORATORIES INC (CLB) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $818.66M in CLB holdings during the latest filing period.
Ariel Appreciation Fund is currently the largest disclosed institutional shareholder of CLB tracked by InsiderSet, reporting ownership valued at approximately $221.13M in its March 31, 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 $150.54M, representing an estimated loss of -31.92% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 77% 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
186
Total Reported Value
$818.66M
Largest Holder
Ariel Appreciation Fund
Largest Position
$221.13M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
179
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. | 2.48% | 13,170,388 | $221,130,814 | $150,537,535 | -$70,593,279 | -31.92% |
| Blackrock, Inc. | 0.00% | 7,208,503 | $121,030,761 | $82,393,189 | -$38,637,572 | -31.92% | |
| Disciplined Growth Investors | Fred Martin | 1.70% | 4,937,115 | $82,894,161 | $56,431,224 | -$26,462,937 | -31.92% |
| Earnest Partners Llc | 0.21% | 3,055,996 | $51,310,173 | $34,930,034 | -$16,380,139 | -31.92% | |
| State Street Corp | 0.00% | 2,060,537 | $34,596,416 | $23,551,938 | -$11,044,478 | -31.92% | |
| Cwa Asset Management Group, Llc | 1.00% | 1,741,001 | $29,231,415 | $19,899,641 | -$9,331,774 | -31.92% | |
| Vanguard Capital Management Llc | 0.00% | 1,619,863 | $27,197,500 | $18,515,034 | -$8,682,466 | -31.92% | |
| Dimensional Fund Advisors Lp | 0.00% | 1,352,329 | $22,705,471 | $15,457,120 | -$7,248,351 | -31.92% | |
| Vanguard Portfolio Management Llc | 0.00% | 1,254,836 | $21,068,696 | $14,342,775 | -$6,725,921 | -31.92% | |
| Geode Capital Management, Llc | 0.00% | 1,137,958 | $19,110,685 | $13,006,860 | -$6,103,825 | -31.94% | |
| Goldman Sachs Group Inc | 0.00% | 848,901 | $14,253,047 | $9,702,938 | -$4,550,109 | -31.92% | |
| Fisher Asset Management, Llc | 0.00% | 736,747 | $12,369,981 | $8,421,018 | -$3,948,963 | -31.92% | |
| Charles Schwab Investment Management Inc | 0.00% | 686,950 | $11,533,891 | $7,851,839 | -$3,682,053 | -31.92% | |
| Gendell Jeffrey L | 0.15% | 648,460 | $10,887,644 | $7,411,898 | -$3,475,746 | -31.92% | |
| Northern Trust Corp | 0.00% | 565,286 | $9,491,151 | $6,461,219 | -$3,029,932 | -31.92% | |
| American Century Companies Inc | 0.00% | 447,097 | $7,506,759 | $5,110,319 | -$2,396,440 | -31.92% | |
| Morgan Stanley | 0.00% | 446,782 | $7,501,480 | $5,106,718 | -$2,394,762 | -31.92% | |
| Ubs Group Ag | 0.00% | 431,653 | $7,247,455 | $4,933,794 | -$2,313,661 | -31.92% | |
| Bank Of New York Mellon Corp | 0.00% | 403,084 | $6,767,776 | $4,607,250 | -$2,160,526 | -31.92% | |
| Vanguard Fiduciary Trust Co | 0.00% | 289,562 | $4,861,746 | $3,309,694 | -$1,552,052 | -31.92% | |
| Advisors Capital Management, Llc | 0.06% | 288,630 | $4,846,098 | $3,299,041 | -$1,547,057 | -31.92% | |
| Mac Alpha Capital Management, Lp | 2.77% | 283,196 | $4,754,692 | $3,236,930 | -$1,517,762 | -31.92% | |
| Principal Financial Group Inc | 0.00% | 271,821 | $4,563,874 | $3,106,914 | -$1,456,960 | -31.92% | |
| Invesco Ltd. | 0.00% | 232,001 | $3,895,297 | $2,651,771 | -$1,243,526 | -31.92% | |
| Bank Of America Corp | 0.00% | 224,618 | $3,771,336 | $2,567,384 | -$1,203,952 | -31.92% | |
| Envestnet Asset Management Inc | 0.00% | 223,876 | $3,758,885 | $2,558,903 | -$1,199,982 | -31.92% | |
| Wells Fargo & Company/Mn | 0.00% | 190,316 | $3,195,401 | $2,175,312 | -$1,020,089 | -31.92% | |
| Hotchkis & Wiley Capital Management Llc | 0.01% | 180,135 | $3,024,467 | $2,058,943 | -$965,524 | -31.92% | |
| Royce & Associates Lp | 0.03% | 179,251 | $3,009,624 | $2,048,839 | -$960,785 | -31.92% | |
| Public Sector Pension Investment Board | 0.01% | 166,588 | $2,797,013 | $1,904,101 | -$892,912 | -31.92% | |
| Citadel Advisors Llc | 0.00% | 154,800 | $2,599,092 | $1,769,364 | -$829,728 | -31.92% | |
| Nuveen, Llc | 0.00% | 150,123 | $2,520,566 | $1,715,906 | -$804,660 | -31.92% | |
| Heartland Advisors Inc | 0.13% | 150,000 | $2,518,500 | $1,714,500 | -$804,000 | -31.92% | |
| Russell Investments Group, Ltd. | 0.00% | 148,337 | $2,490,577 | $1,695,492 | -$795,085 | -31.92% | |
| Rhumbline Advisers | 0.00% | 139,134 | $2,336,042 | $1,590,302 | -$745,740 | -31.92% | |
| Legal & General Group Plc | 0.00% | 119,178 | $2,000,999 | $1,362,205 | -$638,794 | -31.92% | |
| D. E. Shaw & Co., Inc. | 0.00% | 118,426 | $1,988,373 | $1,353,609 | -$634,764 | -31.92% | |
| Marshall Wace, Llp | 0.00% | 117,744 | $1,976,922 | $1,345,814 | -$631,108 | -31.92% | |
| Ameriprise Financial Inc | 0.00% | 100,538 | $1,688,033 | $1,149,149 | -$538,884 | -31.92% | |
| Rice Hall James & Associates, Llc | 0.09% | 99,096 | $1,663,822 | $1,132,667 | -$531,155 | -31.92% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.00% | 96,902 | $1,626,983 | $1,107,590 | -$519,393 | -31.92% | |
| Jump Financial, Llc | 0.02% | 96,200 | $1,615,198 | $1,099,566 | -$515,632 | -31.92% | |
| Swiss National Bank | 0.00% | 92,500 | $1,553,075 | $1,057,275 | -$495,800 | -31.92% | |
| Tidal Investments Llc | 0.00% | 71,201 | $1,195,465 | $813,827 | -$381,638 | -31.92% | |
| Quantinno Capital Management Lp | 0.00% | 68,395 | $1,148,352 | $781,755 | -$366,597 | -31.92% | |
| Bwm Planning, Llc | 0.29% | 65,036 | $1,091,947 | $743,361 | -$348,586 | -31.92% | |
| Creative Planning | 0.00% | 62,471 | $1,048,888 | $714,044 | -$334,844 | -31.92% | |
| Moors & Cabot, Inc. | 0.04% | 60,802 | $1,020,863 | $694,967 | -$325,896 | -31.92% | |
| Raiffeisen Bank International Ag | 0.01% | 60,000 | $1,005,600 | $685,800 | -$319,800 | -31.80% | |
| Panagora Asset Management Inc | 0.00% | 54,962 | $922,812 | $628,216 | -$294,596 | -31.92% |
Frequently asked questions about CLB
Who owns the most CLB stock?
The largest holders of CLB are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for CORE LABORATORIES INC (CLB).
Is CLB widely held by superinvestors?
Many widely followed stocks like CLB appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly CLB is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.