2021 CORPORATE RESPONSIBILITY REPORT I 5 Who is Quest Diagnostics? We are promoting a healthier world not only through our innovations in diagnostics, but also by breaking down barriers to equity in healthcare. We are creating an inspiring workplace by fostering engagement, inclusion, and diversity. We are building value for our customers not only but our creative solutions, but with sustainable operations that lessen our environmental impact. And we accomplish all of this by demonstrating the highest ethical standards in our practices and governance. These key environmental, social, and governance priorities are the foundation of our approach to corporate responsibility. 1 Vision Empowering better health with diagnostic insights 2-Point Strategy • Accelerating growth • Driving operational excellence 3 Goals • Promoting a healthier world • Creating an inspiring workplace • Building value TABLE OF CONTENTS 2021 OVERVIEW COVID-19 RESPONSE PROMOTING A HEALTHIER WORLD CREATING AN INSPIRING WORKPLACE BUILDING VALUE REFERENCES