코어 연구소 Inc.
US ˙ NYSE ˙ US21867A1051

SecurityCLB / Core Laboratories Inc.
InstitutionMoors & Cabot, Inc.
Latest Disclosed Ownership60,802 shares
Latest Disclosed Value $ 1,020,863
Moors & Cabot, Inc. reports 1.68% decrease in ownership of CLB / Core Laboratories Inc.

On May 8, 2026 - Moors & Cabot, Inc. filed a 13F-HR form disclosing ownership of 60,802 shares of Core Laboratories Inc. (US:CLB) valued at $1,020,866 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 61,842 shares of Core Laboratories Inc.. This represents a change in shares of -1.68% during the quarter. The current value of the position is $786,170 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)
2026-05-08 2026-03-31 13F CORE LABORATORIES COM 21867A105 60,802 -1,040 -1.68 1,021 2.93 0.0437
2026-02-10 2025-12-31 13F CORE LABORATORIES COM 21867A105 61,842 -11,645 -15.85 991 9.14 0.0424
2025-11-14 2025-09-30 13F CORE LABORATORIES COM 21867A105 73,487 -467 -0.63 908 6.70 0.0396
2025-08-06 2025-06-30 13F CORE LABORATORIES COM 21867A105 73,954 3,695 5.26 852 -19.18 0.0396
2025-05-08 2025-03-31 13F CORE LABORATORIES COM 21867A105 70,259 -1,559 -2.17 1,053 -15.29 0.0534
2025-02-07 2024-12-31 13F CORE LABORATORIES COM 21867A105 71,818 -2,583 -3.47 1,243 -9.80 0.0591
2024-11-08 2024-09-30 13F CORE LABORATORIES COM 21867A105 74,401 -1,130 -1.50 1,379 -10.05 0.0685
2024-08-09 2024-06-30 13F CORE LABORATORIES COM 21867A105 75,531 100 0.13 1,533 18.94 0.0816
2024-05-08 2024-03-31 13F CORE LABORATORIES COM 21867A105 75,431 100 0.13 1,288 -3.16 0.0698
2024-02-14 2023-12-31 13F CORE LABORATORIES COM 21867A105 75,331 1,170 1.58 1,330 -25.28 0.0829
2023-11-08 2023-09-30 13F CORE LABORATORIES COM 21867A105 74,161 -1,625 -2.14 1,781 1.02 0.1207
2023-08-10 2023-06-30 13F CORE LABORATORIES COM 21867A105 75,786 -132 -0.17 1,762 5.32 0.1170
2023-05-05 2023-03-31 13F CORE LABORATORIES N V COM N22717107 75,918 275 0.36 1,674 9.13 0.1151
2023-02-10 2022-12-31 13F/A-1 CORE LABORATORIES N V COM N22717107 75,643 1,210 1.63 1,533 52.84 0.1068
2023-02-07 2022-12-31 13F CORE LABORATORIES N V COM N22717107 15,061 -59,372 336 0.0224
2022-11-08 2022-09-30 13F CORE LABORATORIES N V COM N22717107 74,433 18,597 33.31 1,003 -9.31 0.0764
2022-08-08 2022-06-30 13F CORE LABORATORIES N V COM N22717107 55,836 4,140 8.01 1,106 -32.35 0.0796
2022-05-13 2022-03-31 13F CORE LABORATORIES N V COM N22717107 51,696 34,426 199.34 1,635 324.68 0.1006
2022-02-14 2021-12-31 13F CORE LABORATORIES N V COM N22717107 17,270 8,725 102.11 385 60.42 0.0237
2021-12-08 2021-09-30 13F/A-1 CORE LABORATORIES N V COM N22717107 8,545 -121 -1.40 240 -28.99 0.0151
2021-11-05 2021-09-30 13F CORE LABORATORIES N V COM N22717107 1,149 -7,517 337 0.0248
2021-08-10 2021-06-30 13F CORE LABORATORIES N V COM N22717107 8,666 311 3.72 338 42.02 0.0237
2021-05-12 2021-03-31 13F CORE LABORATORIES N V COM N22717107 8,355 35 0.42 238 8.18 0.0182
2021-02-11 2020-12-31 13F CORE LABORATORIES N V COM N22717107 8,320 8,320 220 0.0185
2020-05-12 2020-03-31 13F CORE LABORATORIES N V COM N22717107 0 -9,632 -100.00 0 -100.00
2020-01-28 2019-12-31 13F CORE LABORATORIES N V COM N22717107 9,632 -2,485 -20.51 368 -34.05 0.0369
2019-10-22 2019-09-30 13F CORE LABORATORIES N V COM N22717107 12,117 1,034 9.33 558 -4.29 0.0615
2019-07-18 2019-06-30 13F CORE LABORATORIES N V COM N22717107 11,083 -57 -0.51 583 -23.19 0.0739
2019-05-06 2019-03-31 13F/A-1 CORE LABORATORIES N V COM N22717107 11,140 111 1.01 759 15.70 0.1032
2019-05-01 2019-03-31 13F CORE LABORATORIES N V COM N22717107 22,280 11,251 1,518
2019-02-13 2018-12-31 13F CORE LABORATORIES N V COM N22717107 11,029 -9,094 -45.19 656 -71.86 0.1030
2018-11-14 2018-09-30 13F CORE LABORATORIES N V COM N22717107 20,123 1,138 5.99 2,331 -2.55 0.2847
2018-08-14 2018-06-30 13F CORE LABORATORIES N V COM N22717107 18,985 -129 -0.67 2,392 15.67 0.3223
2018-05-18 2018-03-31 13F CORE LABORATORIES N V COM N22717107 19,114 -202 -1.05 2,068 -1.71 0.2733
2018-02-13 2017-12-31 13F CORE LABORATORIES N V COM N22717107 19,316 -173 -0.89 2,104 9.81 0.2787
2017-11-16 2017-09-30 13F CORE LABORATORIES N V COM N22717107 19,489 3,587 22.56 1,916 18.71 0.2771
2017-08-15 2017-06-30 13F CORE LABORATORIES N V COM N22717107 15,902 168 1.07 1,614 -11.22 0.2682
2017-05-15 2017-03-31 13F CORE LABORATORIES N V COM N22717107 15,734 2,982 23.38 1,818 19.37 0.3067
2017-02-13 2016-12-31 13F CORE LABORATORIES N V COM N22717107 12,752 132 1.05 1,523 7.48 0.2507
2016-11-14 2016-09-30 13F CORE LABORATORIES N V COM N22717107 12,620 5,081 67.40 1,417 53.69 0.2369
2016-08-08 2016-06-30 13F CORE LABORATORIES N V COM N22717107 7,539 495 7.03 922 16.71 0.1620
2016-05-10 2016-03-31 13F CORE LABORATORIES N V COM N22717107 7,044 570 8.80 790 12.54 0.1426
2016-02-09 2015-12-31 13F CORE LABORATORIES N V COM N22717107 6,474 910 16.36 702 29.76 0.1285
2015-11-17 2015-09-30 13F CORE LABORATORIES N V COM N22717107 5,564 -310 -5.28 541 -19.01 0.0999
2015-08-17 2015-06-30 13F CORE LABORATORIES N V COM N22717107 5,874 13 0.22 668 8.79 0.1086
2015-05-14 2015-03-31 13F CORE LABORATORIES N V COM N22717107 5,861 -28 -0.48 614 -12.54 0.1024
2015-02-17 2014-12-31 13F CORE LABORATORIES N V COM N22717107 5,889 375 6.80 702 -13.55 0.1190
2014-11-12 2014-09-30 13F CORE LABORATORIES N V COM N22717107 5,514 5,514 812 0.1381
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.