SIGNATURES CORE LABORATORIES N.V. By its sole managing director, Core  Laboratories International B.V. Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report  to be signed on its behalf by the undersigned, thereunto duly authorized. Date: February 13, 2014 By: /s/ JACOBUS SCHOUTEN Jacobus Schouten Managing Director of Core Laboratories  International B.V. Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on  behalf of the Registrant and in the capacities indicated, on the 13th day of February, 2014. Title /s/ DAVID M. DEMSHUR David M. Demshur /s/ RICHARD L. BERGMARK Richard L. Bergmark /s/ C. BRIG MILLER C. Brig Miller /s/ CHARLES L. DUNLAP Charles L. Dunlap /s/ MICHAEL C. KEARNEY Michael C. Kearney /s/ D. JOHN OGREN D. John Ogren /s/ JAN WILLEM SODDERLAND Jan Willem Sodderland /s/ LUCIA VAN GEUNS Lucia van Geuns /s/ MARGARET ANN VAN KEMPEN Margaret Ann van Kempen President, Chief Executive Officer, Chairman and Supervisory Director Executive Vice President, Chief Financial Officer and Supervisory Director Vice President Finance, Treasurer and Chief Accounting Officer Supervisory Director Supervisory Director Supervisory Director Supervisory Director Supervisory Director Supervisory Director 32 Signature