Core Laboratories Inc.
US ˙ NYSE ˙ US21867A1051

SecurityCLB / Core Laboratories Inc.
InstitutionOppenheimer & Co Inc
Latest Disclosed Ownership10,087 shares
Latest Disclosed Value $ 169,361
Oppenheimer & Co Inc ownership in CLB / Core Laboratories Inc.

On April 23, 2026 - Oppenheimer & Co Inc filed a 13F-HR form disclosing ownership of 10,087 shares of Core Laboratories Inc. (US:CLB) valued at $169,361 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 10,087 shares of Core Laboratories Inc.. This represents a change in shares of 0.00% during the quarter. The current value of the position is $134,762 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)
2026-04-23 2026-03-31 13F CORE LABORATORIES COM 21867A105 10,087 0 0.00 169 4.97 0.0021
2026-02-02 2025-12-31 13F CORE LABORATORIES COM 21867A105 10,087 0 0.00 162 29.84 0.0023
2025-11-06 2025-09-30 13F CORE LABORATORIES COM 21867A105 10,087 0 0.00 125 6.90 0.0015
2025-07-31 2025-06-30 13F CORE LABORATORIES COM 21867A105 10,087 0 0.00 116 -23.18 0.0015
2025-04-23 2025-03-31 13F CORE LABORATORIES COM 21867A105 10,087 0 0.00 151 -13.22 0.0023
2025-02-05 2024-12-31 13F CORE LABORATORIES COM 21867A105 10,087 0 0.00 175 -6.45 0.0026
2024-11-05 2024-09-30 13F CORE LABORATORIES COM 21867A105 10,087 -4,050 -28.65 187 -34.97 0.0029
2024-08-08 2024-06-30 13F CORE LABORATORIES COM 21867A105 14,137 0 0.00 287 18.67 0.0046
2024-05-07 2024-03-31 13F CORE LABORATORIES COM 21867A105 14,137 4,000 39.46 241 34.64 0.0040
2024-02-13 2023-12-31 13F CORE LABORATORIES COM 21867A105 10,137 0 0.00 179 -26.34 0.0033
2023-11-08 2023-09-30 13F CORE LABORATORIES COM 21867A105 10,137 -19 -0.19 243 2.97 0.0050
2023-08-03 2023-06-30 13F CORE LABORATORIES COM 21867A105 10,156 -25 -0.25 236 5.36 0.0047
2023-05-10 2023-03-31 13F CORE LABORATORIES N V COM N22717107 10,181 50 0.49 224 9.27 0.0048
2023-02-08 2022-12-31 13F CORE LABORATORIES N V COM N22717107 10,131 0 0.00 205 49.64 0.0047
2022-11-14 2022-09-30 13F CORE LABORATORIES N V COM N22717107 10,131 19 0.19 137 -31.50 0.0032
2022-08-08 2022-06-30 13F CORE LABORATORIES N V COM N22717107 10,112 -25 -0.25 200 -37.89 0.0043
2022-05-12 2022-03-31 13F CORE LABORATORIES N V COM N22717107 10,137 0 0.00 322 42.48 0.0058
2022-02-02 2021-12-31 13F CORE LABORATORIES N V COM N22717107 10,137 -40 -0.39 226 -19.86 0.0040
2021-11-12 2021-09-30 13F CORE LABORATORIES N V COM N22717107 10,177 -20 -0.20 282 -28.97 0.0053
2021-08-03 2021-06-30 13F CORE LABORATORIES N V COM N22717107 10,197 -20 -0.20 397 35.03 0.0071
2021-05-10 2021-03-31 13F CORE LABORATORIES N V COM N22717107 10,217 -3,915 -27.70 294 -21.60 0.0059
2021-02-11 2020-12-31 13F CORE LABORATORIES N V COM N22717107 14,132 0 0.00 375 74.42 0.0079
2020-11-13 2020-09-30 13F CORE LABORATORIES N V COM N22717107 14,132 0 0.00 215 -25.09 0.0054
2020-08-11 2020-06-30 13F CORE LABORATORIES N V COM N22717107 14,132 -4,000 -22.06 287 52.66 0.0074
2020-05-08 2020-03-31 13F CORE LABORATORIES N V COM N22717107 18,132 -1,000 -5.23 188 -73.93 0.0057
2020-02-07 2019-12-31 13F CORE LABORATORIES N V COM N22717107 19,132 -9,135 -32.32 721 -45.30 0.0179
2019-10-31 2019-09-30 13F CORE LABORATORIES N V COM N22717107 28,267 0 0.00 1,318 -10.83 0.0359
2019-08-09 2019-06-30 13F CORE LABORATORIES N V COM N22717107 28,267 0 0.00 1,478 -24.13 0.0402
2019-04-24 2019-03-31 13F CORE LABORATORIES N V COM N22717107 28,267 -30 -0.11 1,948 15.40 0.0520
2019-01-29 2018-12-31 13F CORE LABORATORIES N V COM N22717107 28,297 -430 -1.50 1,688 -49.26 0.0528
2018-10-26 2018-09-30 13F CORE LABORATORIES N V COM N22717107 28,727 0 0.00 3,327 -8.25 0.0847
2018-08-10 2018-06-30 13F CORE LABORATORIES N V COM N22717107 28,727 0 0.00 3,626 16.63 0.0984
2018-05-01 2018-03-31 13F CORE LABORATORIES N V COM N22717107 28,727 -19,970 -41.01 3,109 -41.71 0.0799
2018-02-07 2017-12-31 13F CORE LABORATORIES N V COM N22717107 48,697 -1,700 -3.37 5,334 7.22 0.1373
2017-11-09 2017-09-30 13F CORE LABORATORIES N V COM N22717107 50,397 0 0.00 4,975 -2.51 0.1332
2017-08-09 2017-06-30 13F CORE LABORATORIES N V COM N22717107 50,397 0 0.00 5,103 -12.33 0.1407
2017-05-15 2017-03-31 13F CORE LABORATORIES N V COM N22717107 50,397 0 0.00 5,821 -3.79 0.1648
2017-02-01 2016-12-31 13F CORE LABORATORIES N V COM N22717107 50,397 -1,971 -3.76 6,050 2.84 0.1761
2016-11-07 2016-09-30 13F CORE LABORATORIES N V COM N22717107 52,368 -1,559 -2.89 5,883 -11.94 0.1715
2016-08-08 2016-06-30 13F CORE LABORATORIES N V COM N22717107 53,927 2,174 4.20 6,681 14.83 0.1992
2016-04-26 2016-03-31 13F CORE LABORATORIES N V COM N22717107 51,753 -183 -0.35 5,818 3.03 0.1767
2016-02-03 2015-12-31 13F CORE LABORATORIES N V COM N22717107 51,936 -3,475 -6.27 5,647 2.12 0.1680
2015-11-13 2015-09-30 13F CORE LABORATORIES N V COM N22717107 55,411 13,974 33.72 5,530 17.01 0.1680
2015-08-12 2015-06-30 13F CORE LABORATORIES N V COM N22717107 41,437 6,065 17.15 4,726 27.83 0.1315
2015-05-08 2015-03-31 13F CORE LABORATORIES N V COM N22717107 35,372 6,054 20.65 3,697 4.76 0.1006
2015-02-10 2014-12-31 13F CORE LABORATORIES N V COM N22717107 29,318 -2,434 -7.67 3,529 -24.06 0.1013
2014-11-12 2014-09-30 13F CORE LABORATORIES N V COM N22717107 31,752 -4 -0.01 4,647 -12.40 0.1382
2014-08-14 2014-06-30 13F CORE LABORATORIES N V COM N22717107 31,756 -786 -2.42 5,305 -17.85 0.1596
2014-05-09 2014-03-31 13F CORE LABORATORIES N V COM N22717107 32,542 1,297 4.15 6,458 8.25 0.1936
2014-02-12 2013-12-31 13F CORE LABORATORIES N V COM N22717107 31,245 0 0.00 5,966 12.84 0.1908
2013-11-01 2013-09-30 13F CORE LABORATORIES N V COM N22717107 31,245 600 1.96 5,287 13.75 0.1858
2013-08-14 2013-06-30 13F CORE LABORATORIES N V COM N22717107 30,645 30,645 4,648 0.1797
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.