ABOUT US SUSTAINABILITY INVESTORS CAREERS CUSTOMERS PUBLIC AWARENESS Search Ethics and Compliance ONEOK's Whistleblower Hotline provides for the submission of complaints or concerns under the Whistleblower Policy regarding financial statement disclosures, accounting, internal accounting controls, or auditing matters and matters arising under the ONEOK Code of Business Conduct and Ethics. The Whistleblower process is intended for employees or others to report complaints or concerns regarding accounting and Code of Business Conduct and Ethics matters within the company. Whistleblower Policy Code of Business Conduct and Ethics ONEOK is committed to conducting its business in an ethical manner and in full compliance with applicable U.S. and foreign laws. This includes the U.S. Foreign Corrupt Practices Act, the U.K. Bribery Act, the Organization for Economic Cooperation and Development Convention on Combating Bribery of Foreign Public Officials in International Business Transactions and applicable laws enacted pursuant thereto, and similar laws of other countries. ONEOK has adopted an Anti-Corruption Policy to reinforce that commitment. Anti-corruption Policy Human Exploitation Policy Anti-harassment and Non-discrimination Policy Supplier Letter 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 Board Committees and Charters Audit Committee Chair: Randall J. Larson Vice Chair: Brian L. Derksen Members: Jim W. Mogg Gerald B. Smith Executive Compensation Committee Chair: Pattye L. Moore Vice Chair: Eduardo A. Rodriguez Members: Mark W. Helderman Steven J. Malcolm Corporate Governance Committee Chair: Julie H. Edwards Vice Chair: Eduardo A. Rodriguez Members: Brian L. Derksen Mark W. Helderman Steven J. Malcolm Jim W. Mogg Gerald B. Smith Committee Charters Audit Committee Executive Compensation Committee Corporate Governance Committee 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 History 100-Plus Years and Counting Originally founded in 1906 as an intrastate natural gas pipeline business in Oklahoma, today ONEOK is one of the nation's premier energy companies involved in the natural gas and natural gas liquids businesses. Our business segments provide safe, reliable energy and services to our diverse customers. ONEOK is a FORTUNE 500 company and is included in the S&P 500. View a timeline of accomplishments and milestones. EXECUTING ON OUR STRATEGY WHAT WE DO OUR COMPANY. OUR VALUES. 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.