Mark D. Tattoli - 01 Oct 2025 Form 4 Insider Report for Core Laboratories Inc. /DE/ (CLB)

Role: SVP, Gen Counsel & Secretary
Signature: /s/ Mark D. Tattoli
Issuer symbol: CLB
Transactions as of: 01 Oct 2025
Net transactions value: -$3,472
Form type: 4
Filing time: 02 Oct 2025, 17:16:40 UTC
Previous filing: 05 Aug 2025
Next filing: 05 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Tattoli Mark Damian	SVP, Gen Counsel & Secretary	6316 WINDFERN ROAD, HOUSTON	/s/ Mark D. Tattoli	02 Oct 2025	0001872069

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CLB	Common Stock	Tax liability	$3,472	-276	-1.6%	$12.58	16,719	01 Oct 2025	Direct
transaction	CLB	Common Stock	Options Exercise	$0	+700	+4.3%	$0.000000	16,995	01 Oct 2025	Direct
holding	CLB	Common Stock						20	01 Oct 2025	Custodial account
holding	CLB	Common Stock						1,695	01 Oct 2025	401 (k) Plan

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	CLB	Restricted Shares	Options Exercise	$0	-700	-33%	$0.000000	1,450	01 Oct 2025	Common Stock	700		Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The Restricted Shares vest annually over six years on the anniversary of the grant date in the amount specified in the award agreement, provided the reporting person remains in continuous service on each such vesting date.
F2	Multiple restricted share grants are included in this total.