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2021 CORPORATE RESPONSIBILITY REPORT I 57 As a leading provider of diagnostic information services, we are a crucial part of the healthcare ecosystem. With many, if not most, healthcare decisions informed by diagnostic testing, physicians and patients rely on our services in order to make better healthcare decisions. We continue to develop data-driven strategies and programs to increase quality, affordability, and access to our services while building long-term, sustainable value for all our stakeholders. We continue to increase our capacity, while reducing our environmental footprint, from our new, state-of-the-art laboratory in Clifton, NJ to our logistics and operations. In support of our employees and communities, we provide resources for nonprofit organizations through corporate giving, strategic collaborations, and sharing our expertise through volunteerism. We are committed to strong, ethical governance with oversight from a diverse Board of Directors. To learn more about our governance programs, please refer to our 2022 Proxy Statement in the Investor Relations section of our website at QuestDiagnostics.com. Building value Goal 3 • 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

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