CLB 2019 Proxy Statement

9 INFORMATION ABOUT OUR SUPERVISORY DIRECTORS AND DIRECTOR COMPENSATION Board of Supervisory Directors Set forth below as of March 15, 2019 is the biographical information for our Supervisory Directors who will serve following the annual meeting and their respective committee assignments following the meeting, including individuals who have been nominated for reelection or election as Class II Supervisory Directors. You may vote for each of the nominees, for one or more of the nominees or for none of the nominees. Nominees for Class II Supervisory Directors (Term To Expire 2022) Martha Z. Carnes Supervisory Director since 2016 Chairman of Audit Committee Age: 58 Ms. Carnes retired from PricewaterhouseCoopers LLP (“PwC”) in June 2016, where she had a thirty-four year career with the firm. She was an Assurance Partner serving large, publicly traded companies in the energy industry. Ms. Carnes held a number of leadership positions with PwC including the Houston office Managing Partner. She also served as PwC’s Energy and Mining leader for the United States where she led the firm’s energy and mining assurance, tax and advisory practices. In these roles, she was responsible for leading the design and execution of the market and sector strategies, business development, compensation, professional development, succession planning, and client satisfaction. As an Assurance Partner, Ms. Carnes had vast experience with capital markets activities and was the lead audit partner on some of the largest merger and acquisition transactions completed in the energy sector. Ms. Carnes also served as one of PwC’s Risk Management Partners and was PwC’s United States representative on the firm’s Global Communities Board. She is a member of the American Institute of Certified Public Accountants and the Texas Society of Certified Public Accountants. Since September 1, 2017, she has served as a director of SunCokeEnergyPartners GPLLC, the general partner of SunCoke Energy Partners LP. Since July 2017, Ms. Carnes has also served as a director of Matrix Service Company, a services company that provides engineering, fabrication, infrastructure, construction, and maintenance services primarily to the oil, gas, power, petrochemical, industrial, agricultural, mining and minerals markets, where she chairs the Audit Committee and is a member of the Compensation and Nominations and Governance Committees. Her financial expertise and experience in working with and auditing public companies in the energy industry, and her operational experience at PwC, a professional services firm, allow her to provide important insight to the Company. Michael Straughen Supervisory Director since 2016 Chairman of Compensation Committee and member of the Audit Committee Age: 69 Following an extensive career in oilfield services, Mr. Straughen retired from executive office at the end of 2014 and now has various non-executive positions. He currently serves on the boards of Glacier, an Aberdeen based offshore services company; the Glasgow based Denholm Oilfield Services Group; and ASCO, an Aberdeen based logistics