ABOUT US SUSTAINABILITY INVESTORS CAREERS CUSTOMERS PUBLIC AWARENESS Search Corporate Sustainability Report Archive 2019 - 2020 Report 2018 - 2019 Report 2017 - 2018 Report 2016 Report 2015 Report 2014 Report 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 Corporate Sustainability 2020-2021 Corporate Sustainability Report ONEOK releases an annual Corporate Sustainability Report to highlight our company's progress and commitment to environmental, social and governance (ESG) performance. Download the 2020-2021 report. Sustainability Standards and Frameworks To help guide ONEOK’s ESG performance disclosures, we reference several recognized reporting standards and frameworks, including the Sustainability Accounting Standards Board (SASB) and Global Reporting Initiative (GRI) standards for voluntary ESG reporting and Task Force on Climate-related Financial Disclosures (TCFD) recommendations for voluntary disclosure of climate risks and opportunities. ONEOK reports industry-specific ESG data aligned with the Midstream ESG Reporting Template, developed by the Energy Infrastructure Council (EIC) and GPA Midstream Association. Download our frameworks and standards reporting. SASB TCFD GRI EIC Midstream ESG Reporting Template ONEOK ESG Performance Our consolidated ESG performance table compiles company metrics in a concise manner to provide transparency to our stakeholders on ONEOK’s sustainability performance over time. Download the Performance Data Table. Limited Assurance from External Third Party ONEOK engages an independent accountant to perform attest procedures for certain environmental and safety metrics disclosed in ONEOK's Performance Data Table. Download the Report of Independent Accountants. 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.