ABOUT US SUSTAINABILITY INVESTORS CAREERS CUSTOMERS PUBLIC AWARENESS Search Board of Directors BRIAN L. DERKSEN Retired Global Deputy Chief Executive Officer Deloitte Touche Tohmatsu Limited JULIE H. EDWARDS Former Chief Financial Officer Frontier Oil Corporation and Southern Union Company JOHN W. GIBSON Chairman of the Board and Retired Chief Executive Officer ONEOK, Inc. MARK W. HELDERMAN Retired Managing Director and Co-Portfolio Manager Sasco Capital Inc. RANDALL J. LARSON Retired Chief Executive Officer TransMontaigne Partners L.P. STEVEN J. MALCOLM Retired Chairman, President and Chief Executive Officer The Williams Companies, Inc. JIM W. MOGG Retired Chairman DCP Midstream GP, L.L.C. PATTYE L. MOORE Former Chairman, Red Robin Gourmet Burgers Former President, Sonic Corp. PIERCE H. NORTON II President and Chief Executive Officer ONEOK, Inc. EDUARDO A. RODRIGUEZ President Strategic Communications Consulting Group GERALD B. SMITH Founder, Chairman and Chief Executive Officer Smith, Graham & Company Investment Advisors GOVERNANCE BOARD COMMITTEES AND CHARTERS LEARN MORE GOVERNANCE MANAGEMENT TEAM LEARN MORE CONNECT Our Company Our Community Media Inquiries RESOURCES Careers Investors Legal and Privacy Policy Safety Data Sheets ONEOK Plaza 100 West Fifth Street Tulsa, OK 74103 918-588-7000 ©ONEOK, Inc. All rights reserved.

ABOUT US SUSTAINABILITY INVESTORS CAREERS CUSTOMERS PUBLIC AWARENESS Search Our Values Ethics Our actions are founded on trust, honesty, integrity and respect through open communications and adherence to the highest standards of personal, professional and business ethics. Quality Our commitment to quality drives us to continuously improve in our quest for excellence. Diversity We value diversity, the dignity and worth of each employee, and believe that a diverse and inclusive workforce is critical to our continued success. Value We are committed to creating value for all stakeholders – employees, customers, investors and our communities – through the optimum development and utilization of our resources. Service We provide responsive, flexible service to customers, and commit to preserving the environment, providing a safe workplace and improving the quality of life for employees where they live and work. EMPLOYEES EMPLOYEE BENEFITS LEARN MORE CONNECT Our Company Our Community Media Inquiries RESOURCES Careers Investors Legal and Privacy Policy Safety Data Sheets ONEOK Plaza 100 West Fifth Street Tulsa, OK 74103 918-588-7000 ©ONEOK, Inc. All rights reserved.