Core Laboratories Inc.
US ˙ NYSE ˙ US21867A1051

SecurityCLB / Core Laboratories Inc.
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership1,352,329 shares
Latest Disclosed Value $ 22,705,471
Dimensional Fund Advisors Lp reports 9.98% increase in ownership of CLB / Core Laboratories Inc.

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 1,352,329 shares of Core Laboratories Inc. (US:CLB) valued at $22,705,604 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 1,229,611 shares of Core Laboratories Inc.. This represents a change in shares of 9.98% during the quarter. The current value of the position is $17,485,614 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-07 2026-03-31 13F CORE LABORATORIES COM 21867A105 1,352,329 122,718 9.98 22,705 15.20 0.0047
2026-02-12 2025-12-31 13F CORE LABORATORIES COM 21867A105 1,229,611 118,535 10.67 19,711 43.52 0.0041
2025-11-12 2025-09-30 13F CORE LABORATORIES COM 21867A105 1,111,076 -58,392 -4.99 13,734 1.93 0.0029
2025-08-12 2025-06-30 13F CORE LABORATORIES COM 21867A105 1,169,468 196,907 20.25 13,473 -7.59 0.0031
2025-05-13 2025-03-31 13F CORE LABORATORIES COM 21867A105 972,561 124,578 14.69 14,580 -0.67 0.0036
2025-02-13 2024-12-31 13F CORE LABORATORIES COM 21867A105 847,983 28,393 3.46 14,678 -3.35 0.0035
2024-11-07 2024-09-30 13F CORE LABORATORIES COM 21867A105 819,590 67,436 8.97 15,187 -0.48 0.0037
2024-08-09 2024-06-30 13F CORE LABORATORIES COM 21867A105 752,154 -56,361 -6.97 15,261 10.51 0.0040
2024-05-10 2024-03-31 13F CORE LABORATORIES COM 21867A105 808,515 -139,292 -14.70 13,809 -17.50 0.0037
2024-02-07 2023-12-31 13F CORE LABORATORIES COM 21867A105 947,807 75,684 8.68 16,739 -20.07 0.0049
2023-11-09 2023-09-30 13F CORE LABORATORIES COM 21867A105 872,123 58,408 7.18 20,940 10.68 0.0069
2023-08-09 2023-06-30 13F CORE LABORATORIES COM 21867A105 813,715 20,689 2.61 18,920 8.20 0.0060
2023-05-12 2023-03-31 13F CORE LABORATORIES N V COM N22717107 793,026 240,452 43.51 17,486 158,863.64 0.0059
2023-02-09 2022-12-31 13F CORE LABORATORIES N V COM N22717107 552,574 42,949 8.43 11 -99.84 0.0033
2022-11-10 2022-09-30 13F CORE LABORATORIES N V COM N22717107 509,625 -100,400 -16.46 6,871 -43.14 0.0026
2022-08-12 2022-06-30 13F CORE LABORATORIES N V COM N22717107 610,025 99,748 19.55 12,085 -25.13 0.0043
2022-05-13 2022-03-31 13F CORE LABORATORIES N V COM N22717107 510,277 66,137 14.89 16,141 62.89 0.0050
2022-02-09 2021-12-31 13F CORE LABORATORIES N V COM N22717107 444,140 1,019 0.23 9,909 -19.41 0.0030
2021-11-12 2021-09-30 13F CORE LABORATORIES N V COM N22717107 443,121 -306,977 -40.92 12,296 -57.91 0.0040
2021-08-12 2021-06-30 13F CORE LABORATORIES N V COM N22717107 750,098 23,005 3.16 29,216 39.58 0.0093
2021-05-14 2021-03-31 13F CORE LABORATORIES N V COM N22717107 727,093 92,651 14.60 20,932 24.45 0.0069
2021-03-08 2020-12-31 13F/A-2 CORE LABORATORIES N V COM N22717107 634,442 29,875 4.94 16,820 82.29 0.0061
2021-02-11 2020-12-31 13F CORE LABORATORIES N V COM N22717107 634,442 29,875 16,820 6,074.4900
2020-11-12 2020-09-30 13F CORE LABORATORIES N V COM N22717107 604,567 -3,729 -0.61 9,227 -25.34 0.0039
2020-08-13 2020-06-30 13F CORE LABORATORIES N V COM N22717107 608,296 -80,467 -11.68 12,358 73.57 0.0054
2020-05-14 2020-03-31 13F CORE LABORATORIES N V COM N22717107 688,763 38,503 5.92 7,120 -70.96 0.0037
2020-02-14 2019-12-31 13F CORE LABORATORIES N V COM N22717107 650,260 119,016 22.40 24,516 -1.01 0.0089
2019-11-12 2019-09-30 13F CORE LABORATORIES N V COM N22717107 531,244 90,316 20.48 24,766 7.44 0.0096
2019-08-13 2019-06-30 13F CORE LABORATORIES N V COM N22717107 440,928 13,909 3.26 23,050 -21.69 0.0089
2019-08-12 2019-03-31 13F/A-2 CORE LABORATORIES N V COM N22717107 427,019 29,169 7.33 29,435 24.01 0.0117
2019-05-10 2019-03-31 13F CORE LABORATORIES N V COM N22717107 427,019 29,169 29,435
2019-02-26 2018-12-31 13F/A-1 CORE LABORATORIES N V COM N22717107 397,850 98,124 32.74 23,736 -31.63 0.0108
2019-02-13 2018-12-31 13F CORE LABORATORIES N V COM N22717107 397,850 98,124 23,736
2018-11-13 2018-09-30 13F CORE LABORATORIES N V COM N22717107 299,726 4,620 1.57 34,716 -6.79 0.0132
2018-08-10 2018-06-30 13F CORE LABORATORIES N V COM N22717107 295,106 17,914 6.46 37,244 24.15 0.0148
2018-05-11 2018-03-31 13F CORE LABORATORIES N V COM N22717107 277,192 8,287 3.08 29,998 1.83 0.0125
2018-02-12 2017-12-31 13F CORE LABORATORIES N V COM N22717107 268,905 10,117 3.91 29,458 15.33 0.0122
2017-11-13 2017-09-30 13F CORE LABORATORIES N V COM N22717107 258,788 -1,704 -0.65 25,542 -3.17 0.0112
2017-08-11 2017-06-30 13F CORE LABORATORIES N V COM N22717107 260,492 7,077 2.79 26,379 -9.88 0.0122
2017-05-12 2017-03-31 13F CORE LABORATORIES N V COM N22717107 253,415 35,745 16.42 29,272 12.03 0.0140
2017-02-09 2016-12-31 13F CORE LABORATORIES N V COM N22717107 217,670 6,962 3.30 26,128 10.40 0.0131
2016-11-10 2016-09-30 13F CORE LABORATORIES N V COM N22717107 210,708 16,797 8.66 23,667 -1.47 0.0128
2016-08-09 2016-06-30 13F CORE LABORATORIES N V COM N22717107 193,911 2,500 1.31 24,021 11.63 0.0138
2016-05-13 2016-03-31 13F CORE LABORATORIES N V COM N22717107 191,411 -3,560 -1.83 21,519 1.51 0.0129
2016-02-10 2015-12-31 13F CORE LABORATORIES N V COM N22717107 194,971 -5,193 -2.59 21,199 6.13 0.0132
2015-11-13 2015-09-30 13F CORE LABORATORIES N V COM N22717107 200,164 46,019 29.85 19,975 13.62 0.0131
2015-08-14 2015-06-30 13F CORE LABORATORIES N V COM N22717107 154,145 86,622 128.29 17,580 149.18 0.0108
2015-05-14 2015-03-31 13F CORE LABORATORIES N V COM N22717107 67,523 -229 -0.34 7,055 -13.47 0.0045
2015-02-06 2014-12-31 13F CORE LABORATORIES N V COM N22717107 67,752 3,464 5.39 8,153 -13.36 0.0054
2014-11-13 2014-09-30 13F CORE LABORATORIES N V COM N22717107 64,288 100 0.16 9,410 -12.24 0.0067
2014-08-08 2014-06-30 13F CORE LABORATORIES N V COM N22717107 64,188 23,695 58.52 10,723 33.45 0.0075
2014-05-14 2014-03-31 13F CORE LABORATORIES N V COM N22717107 40,493 5,985 17.34 8,035 21.95 0.0060
2014-02-12 2013-12-31 13F CORE LABORATORIES N V COM N22717107 34,508 1,496 4.53 6,589 17.98 0.0051
2013-11-13 2013-09-30 13F CORE LABORATORIES N V COM N22717107 33,012 9,731 41.80 5,585 58.13 0.0048
2013-08-15 2013-06-30 13F CORE LABORATORIES N V COM N22717107 23,281 23,281 3,532 0.0033
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.