CLB 2018 Annual Report

39 SIGNATURES 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. CORE LABORATORIES N.V. By its sole managing director, Core Laboratories International B.V. Date: February 11, 2019 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 11th day of February, 2019.