Sec Form 4 Filing - Hill Christopher Scott @ Core Laboratories Inc. /DE/ - 2023-12-31

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Hill Christopher Scott 2. Issuer Name and Ticker or Trading Symbol Core Laboratories Inc. /DE/ [ CLB] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) SVP & CFO (Last) (First) (Middle) 6316 WINDFERN ROAD 3. Date of Earliest Transaction (MM/DD/YY) 12/31/2023 (Street) HOUSTON, TX77040 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 12/31/2023 F 13,870 D $ 17.66 72,374 D Common Stock 12/31/2023 M 36,072 A $ 0 86,244 D Common Stock 59 I 401(k) Plan

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Performance Shares $ 0 12/31/2023 M 36,072 ( 1 ) ( 1 ) Common Stock 36,072 $ 0 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Hill Christopher Scott 6316 WINDFERN ROAD HOUSTON, TX77040 SVP & CFO Signatures /s/ Mark Tattoli, Attorney-in-Fact 01/03/2024 Signature of Reporting Person Date

Explanation of Responses:

( 1 )These shares were awarded as restricted performance shares in February 2021, as disclosed in the Reporting Person's Form 4 filing on February 19, 2021. The Company finished in the 81st percentile of return on invested capital among the Bloomberg Peer Group at the conclusion of the performance period on December 31, 2023. Excess shares that could vest above the 75th percentile are subject to an absolute total shareholder return modifier, which was negative over the relevant performance period, thereby reducing the number of such shares eligible to vest by one-half. Therefore, the performance criteria and requirements for vesting have been satisfied at 106.25% of the target award level, and such number of shares vested on December 31, 2023.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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