Sec Form 4 Filing - Tattoli Mark Damian @ Core Laboratories Inc. /DE/ - 2024-02-15

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 Tattoli Mark Damian 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, Gen Counsel & Secretary (Last) (First) (Middle) 6316 WINDFERN ROAD 3. Date of Earliest Transaction (MM/DD/YY) 02/15/2024 (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

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 02/15/2024 A 38,002 ( 1 )( 2 ) ( 1 )( 2 ) Common Stock 38,002 $ 0 38,002 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Tattoli Mark Damian 6316 WINDFERN ROAD HOUSTON, TX77040 SVP, Gen Counsel & Secretary Signatures /s/ Mark D. Tattoli 02/15/2024 Signature of Reporting Person Date

Explanation of Responses:

( 1 )This award vests at the end of a three-year performance period that began on January 1, 2024 and ends on December 31, 2026 (the "Performance Period"). This award survives termination of employment due to death, disability, termination by the Company without cause or retirement by the employee upon having reached 62 years of age. In all cases, the shares will vest, if at all, at the end of the Performance Periodas follows: 50% of the award will vest if the Company is in the top 35th percentile of Return on Invested Capital (ROIC) among the Bloomberg Peer Group (BPG), 100% of the award will vest if the Company is in the top 55th percentile of ROIC of the BPG, and 175% of the award will vest if the Company is in the top 85th percentile of ROIC of the BPG, as measured and determined by the Compensation Committee at the end of the Performance Period. ( 2 )The number of common shares vesting pursuant to the award will be interpolated on a straight-line basis between the 35th and 55th percentile (equivalent to 50% up to 100% of the award) and again between the 55th and 85th percentile (equivalent to 100% up to 175% of the award).The number of common shares that could vest over 100% of the award up to the maximum of 175% of the award, if any, will be reduced by one-half if absolute total shareholder return for the Performance Period is negative, as measured and determined by the Compensation Committee at the end of the Performance Period.

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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