SEC FORM 4

SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

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

1. Name and Address of Reporting Person^*

DAVIS MONTY L

(Last)

(First)

(Middle)

6316 WINDFERN

(Street)

HOUSTON

77040

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
CORE LABORATORIES N V [ CLB ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	COO

3. Date of Earliest Transaction (Month/Day/Year)
02/28/2005

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Shares	02/28/2005		M		20,000	A	$0	46,242	D
Common Shares	02/28/2005		F		8,000	D	$28.69	38,242⁽¹⁾	D
Common Shares								10,651	I⁽²⁾	Deferred Comp / 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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Performance Shares⁽³⁾	$0⁽⁴⁾	02/28/2005		M			20,000	12/31/2004	12/31/2004	Common Shares	20,000	$0	0	D

Explanation of Responses:

1. Includes 16,492 restricted shares granted pursuant to an Executive Matching Agreement. The restricted shares will generally vest three years from the date of grant assuming continued employment, continued ownership of the underlying common shares upon which the grant was based and certain other conditions.

2. These Common Shares were acquired pursuant to the Core Laboratories, Inc. Profit Sharing and Retirement Plan (the "401(k) Plan") or pursuant to the Core Laboratories, Inc. Deferred Compensation Plan (the "Deferred Comp Plan"), as the case may be, on various dates at various prices per share. The number of Common Shares shown in column 5 of Table 1 is based on an allocation of the aggregate number of Common Shares acquired by the trustee under the 401(k) Plan or the Deferred Comp Plan, as the case may be, for the benefit of the plan participants who elected to make intra-plan transfers into the Common Share fund under the 401(k) Plan or the Deferred Comp Plan, as the case may be, at approximately the same time (pro rata, based on the dollar amount of each such participant's intra-plan transfer into the Common Share fund, rounding up or down to the nearest whole share).

3. Includes tax withholding right.

4. 1-for-1

	/s/ John D. Denson, Attorney-in-fact	03/01/2005
	** Signature of Reporting Person	Date
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).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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