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Mr. Davis became Chairman of the Board on April 1, 2023 and Chief Executive Officer and President of the Company on November 1, 2022, having served as CEO-Elect since February 3, 2022. Mr. Davis joined Quest Diagnostics in April 2013 as Senior Vice President, Diagnostics Solutions. He initially managed a portfolio of businesses and was instrumental in refocusing the Company on diagnostic information services. Mr. Davis was given positions of increasing responsibility and was named Executive Vice President, General Diagnostics in January 2017. Prior to joining Quest Diagnostics, Mr. Davis served as Lead Director, and then as Chief Executive Officer, of InSightec, Inc., a medical device company that designs and develops ultrasound ablation devices that are guided by magnetic resonance imaging systems. Previously, he held a number of senior positions in General Electric's healthcare business, held leadership positions in General Electric's aviation business and led the development of strategic and operational improvement initiatives for clients of McKinsey & Company, Inc.

Mr. Samad joined the Company in his current role in July 2022. He is responsible for the Company's finance, accounting, investor relations, internal audit and treasury activities. In 2025, Mr. Samad assumed responsibility for LifeLabs. Prior to joining the Company, Mr. Samad served as Chief Financial Officer of Illumina, Inc., a global leader in DNA sequencing and array-based technologies, since 2017. Prior to joining Illumina, Mr. Samad held several senior leadership positions at Cardinal Health, including Senior Vice President and Treasurer, with operational and financial responsibility for Cardinal Health's China business, and before that in sales and finance roles at Eli Lilly and Company, both domestically and internationally. Mr. Samad is also a director at IDEXX Laboratories, Inc.

Since March 2022, Ms. Doherty has been responsible for the general management of the Company's regional Diagnostic Information Services business, the commercial organization and marketing. She also is responsible for driving operational excellence, including the Company's quality and efficiency initiatives. Ms. Doherty is the Executive Sponsor of the Company's Women in Leadership Employee Business Network. From January 2020 to January 2023, she was responsible for consumer-initiated testing, which was launched under her leadership. From January 2013 to March 2022, Ms. Doherty was Senior Vice President and Group Executive - Clinical Franchise Solutions and Marketing. In this role, she was responsible for overseeing the development of clinical franchise solutions in the areas of general health and wellness, cardiovascular, metabolic and endocrinology, infectious disease and immunology, and prescription drug monitoring and toxicology, as well as enterprise-wide marketing, the employer solutions and risk assessment businesses, and beginning in February 2020, our sports diagnostics franchise. She also was responsible for clinical franchise solutions in the areas of neurology and women's health from January 2013 to January 2017 and for the healthcare IT business from February 2014 to January 2017. Prior to January 2013, Ms. Doherty held a variety of positions of increasing responsibility since joining the Company in 1990, including Senior Vice President, Physician Services; Vice President, Hospital Services; Vice President, Office of the Chairman; Vice President, Finance and Administration for the Hospital business; Vice President, Communications and Investor Relations; and Chief Accounting Officer. During 2024 she assumed responsibility for the anatomic pathology business branded AmeriPath and retained all other responsibilities except marketing.

Mr. Kuppusamy assumed his current role in August 2022. He is responsible for the following clinical franchises: Cardiovascular, Metabolic, Endocrinology and Wellness, Drug Monitoring and Toxicology, Infectious Disease and Immunology, Neurology, and Women's and Reproductive Health. He is also responsible for the Company's genomic customer services, medical affairs, and regulatory. In 2025, Mr. Kuppusamy assumed responsibility for R&D, Oncology, including Haystack Oncology, and Genomics. Previously, Mr. Kuppusamy was Vice President and General Manager of the Company's Diagnostics Information Services business in its North Region since from 2018 and General Manager of the Neurology Franchise and Consumer Genetics from 2014 to 2017. He joined the Company in 2014 from General Electric's healthcare business where he held general manager roles in product development, research and development, sales and marketing in the Diagnostics Imaging Division.

Mr. Prevoznik joined the Company as Vice President and General Counsel in August 1999. In 2003, he assumed responsibility for governmental affairs. Mr. Prevoznik also is Vice Chair of the Quest Foundation, Executive Co-Sponsor of the Company's Quest for Health Initiative, and Executive Co-Sponsor of the QuestCAN Employee Business Network. From 1999 until April 2009, Mr. Prevoznik also had responsibility for the Company's Compliance Department. In addition, from April 2011 to January 2017, he had management responsibility for the Company's diagnostic information services activities outside the United States, and from April 2011 to January 2013, he had management responsibility for the Company's clinical trials business. Prior to joining the Company, Mr. Prevoznik served in positions of increasing responsibility within the compliance organization at SmithKline Beecham, most recently as Vice President, Compliance, with responsibility for coordinating all SmithKline Beecham compliance activities worldwide.

Mr. Ring is our Lead Independent Director. He retired in 2017 as Chairman and Chief Executive Officer of C. R. Bard, Inc., positions in which he had served since 2003. Mr. Ring is a director of Becton, Dickinson and Company, and was director of C. R. Bard, Inc. from 2003 to 2017 and of CIT Group Inc. from 2005 to 2009. He is a co-founder of TeamFund, Inc., an impact fund and non-profit focused on delivering medical technology to Sub-Saharan Africa and India.

Mr. Pfeiffer retired in 2006 as the Senior Vice President and Chief Financial Officer of E.I. du Pont de Nemours and Company. He joined DuPont in 1974, where he held positions of increasing responsibility in finance and international operations, as well as in various DuPont divisions. Mr. Pfeiffer served as Secretary of Finance for the state of Delaware from January through June 2009. Mr. Pfeiffer served as a director of Internap Corporation from 2007 to 2020, TerraVia Holdings, Inc. from 2014 to 2017 and Talbots, Inc. from 2005 to 2012. He served as the non-executive Chair of the Board of Directors of Christiana Care Health System, a regional hospital system located in Delaware, from 2012 to 2016.

Ms. Gregg is a cofounder/partner of Guidon Partners LLC. She retired as Chief Executive Officer of Blue Cross Blue Shield of Tennessee in 2012. Prior to becoming Chief Executive Officer in 2003, Ms. Gregg served in a number of other leadership roles, including President and Chief Operating Officer. Before that, she held a series of senior roles at Humana Health Plans. Ms. Gregg served as a member of the U.S. National Institutes of Health Commission on Systemic Interoperability. She currently serves on the boards of Acadia Healthcare Company, Inc., Erlanger Health System and the Electric Power Board of Chattanooga, as well as the boards of several private companies, including MyEyeDr. Previously, Ms. Gregg served on several boards, including TeamHealth Holdings, Inc., then a public company, from 2013 to 2017 and First Horizon Corporation from 2011 to 2015. She has also served as Chair of America's Health Insurance Plans, as a member of the BlueCross BlueShield Association, as Chair of the Board of the National Institute for Healthcare Management, and as a member of the Healthcare Leadership Council.

Ms. Morrison is the founder of Denise Morrison & Associates, LLC, a consulting firm. She retired in 2018 as the President and Chief Executive Officer of Campbell Soup Company. Ms. Morrison joined Campbell in 2003, where she held positions of increasing responsibility. Prior to joining Campbell, she held executive management positions at Kraft Foods, Inc. from 2001 to 2003. Ms. Morrison is a director of MetLife, Inc. and Visa, Inc. and served as a director of Campbell Soup Company from 2010 to 2018 and a director of The Goodyear Tire & Rubber Company from 2005 to 2010. She is a Trustee Associate for Boston College, Enterprise Executive Sponsorship Council for Bank of America and the Advisory Council for Just Capital. Ms. Morrison previously served on the Advisory Board for Tufts Friedman School of Nutrition Science and Policy; the New Jersey Restart and Recovery Commission; President Trump's Manufacturing Jobs Initiative; and President Obama's Export Council.

Mr. Main has been the Non-Executive Chairman of WNS (Holdings) Limited since September 2021. From 2000 until 2013 he was the Chief Executive Officer, and from 2013 until 2021 the non-executive Chairman of the Board, of Jabil, Inc., an electronic product solutions company providing comprehensive electronics design, manufacturing and management services to global electronics and technology companies. As Chief Executive Officer, Mr. Main led Jabil's growth strategy, increasing annual revenues nearly five-fold to reach $17 billion in 2012, and expanding in Asia and other emerging markets.

Ms. Doi retired as Chief Financial Officer and Group Vice President of Toyota Motor North America, Inc. in 2022, after serving nearly twenty years as Chief Financial Officer. Ms. Doi joined Toyota in 2000 as Vice President, Corporate Controller and her responsibilities continued to expand upon her elevation to Chief Financial Officer in 2003. She currently serves on the board of Pentair plc and as an independent trustee of SunAmerica Series Trust and Season Series Trust. Ms. Doi served on the board of City National Bank, a Royal Bank of Canada Company, from 2016 to 2021, and on the Federal Reserve Bank of San Francisco Economic Advisory Council from 2009 to 2016.

Mr. Carter retired as Executive Vice President and Chief Information Officer at FedEx Corporation in 2024, where he worked for over 30 years and was responsible for setting the technology direction of the FedEx applications, infrastructure and networks that provide support for FedEx product offerings. Mr. Carter serves on the board of directors of New York Life and previously served on the boards of First Horizon Corporation, Pilot Corporation and Saks, Inc. He also serves as the Chairman of the Board of Trustees for the University of Memphis. Mr. Carter earned a bachelor's degree in computer and information science from the University of Florida, and a master's degree from the University of South Florida.

Dr. Diaz has been the head of the division of solid tumor oncology at the Memorial Sloan Kettering Cancer Center since December 2016. Previously, he was a faculty member and physician at the Johns Hopkins University School of Medicine. He has founded several biotechnology companies, including Epitope, Inostics, PapGene (Thrive) and Personal Genome Diagnostics, Inc. Dr. Diaz's early work provided the first definitive evidence for using circulating tumor DNA as cancer biomarker for screening, monitoring, and detection of occult disease. He discovered the therapeutic link between immunotherapy and cancer genetics in patients with mismatch repair deficient tumors, which led to the first tumor agnostic FDA approval for tumors with this genetic lesion and the first cancer study, published in 2022, that resulted in a 100% complete remission rate. Dr. Diaz served on the board of Jounce Therapeutics, Inc. from 2017 until it was acquired in 2023. He is the recipient of numerous awards and honors. Dr. Diaz was elected to the National Academy of Medicine in 2023 and in 2021 he was appointed by President Biden to the National Cancer Advisory Board of the National Institutes of Health.

In August 2022, Mr. Lassiter became Chief Executive Officer of CommonSpirit Health, one of the country's largest and most diverse health care organizations, with more than 2,300 care sites across 24 states. Prior to joining CommonSpirit Health, he was President and Chief Executive Officer of Henry Ford Health System in Detroit, Michigan from December 2014 to 2022. Prior to that, he was Chief Executive Officer of Alameda Health System in Oakland, California from 2005 to 2014. Mr. Lassiter currently serves on the board of Fortive Corporation and is the Chair of the American Hospital Association. Previously he served on the boards of DT Midstream, Inc. from 2021 to 2023 and Henry Ford Health System and as Vice Chair for the Federal Reserve Bank of Chicago.

On March 9, 2026, the Board of Directors of Quest Diagnostics Incorporated, elected Timothy Wentworth, former chief executive officer of Walgreens Boots Alliance, as an Independent Director. Mr. Wentworth was most recently chief executive officer (CEO) of Walgreens Boots Alliance, where he helped restructure the company for its sale to Sycamore Partners in mid-2025. Prior to that, he was founding CEO of Evernorth Health Services, the health services organization of The Cigna Group that partners with health plans, employers and government organizations to deliver pharmacy, care, and benefit solutions. In addition, Mr. Wentworth was president and CEO of Express Scripts, one of the largest pharmacy benefit managers in the United States, following the company's 2012 acquisition of Medco Health Solutions, where he held roles as group president, employer accounts and president and CEO of Medco's Accredo Health specialty pharmacy business. With the Medco transaction, Express Scripts grew into a Fortune 25 company with more than $100 billion in revenues before its acquisition by Cigna in 2018. Mr. Wentworth's experience also includes senior leadership roles with top consumer brands, including chief operating officer at Mary Kay, Inc., and director roles in human resources at PepsiCo, Inc. Mr. Wentworth serves on the boards of directors of Walgreens Holding Company and dfinitiv, and previously served on the boards of Walgreens Boots Alliance, Accredo Health Group, Express Scripts, and Forge Health. He earned his bachelor's degree in industrial and labor relations from Cornell University and an associate in applied science degree in business administration from Monroe Community College.

Mr. Delaney joined the Company in March 2022 and is responsible for all sales operations. From 2017 until Hill-Rom Holdings Inc. was acquired by Baxter Healthcare in 2021, Mr. Delaney served as Vice President of Sales and Marketing at Hill-Rom, a manufacturer and provider of medical technologies and related services for the healthcare industry; after the acquisition by Baxter Mr. Delaney became Vice President and General Manager at Baxter until he joined Quest Diagnostics. Previously, Mr. Delaney served in a number of senior sales and marketing leadership roles at General Electric's healthcare business, most recently as Senior Vice President and Zone Manager, where he had regional responsibility for sales of imaging, patient monitoring, IT and services.

Mr. Plewman assumed his current role in April 2022. He is responsible for a portfolio of data driven analytics and services offerings, including Workforce Health Solutions, Healthcare Analytic Solutions, Risk Assessment (ExamOne), Consumer Initiated Testing and Pharma Services. In 2025, Mr. Plewman assumed responsibility for global markets. Since joining the Company in 2013, Mr. Plewman was Vice President and General Manager of the Company's Diagnostic Information Services Business in its West Region since 2018 and previously served as General Manager of the Company's Cardiovascular, Metabolic and Endocrinology Franchise, General Manager of the Company's Infectious Disease and Immunology Franchise and General Manager of the General Health and Wellness Franchise. Mr. Plewman serves as Executive Co-Sponsor of the HealthyQuest Employee Business Network. Prior to joining the Company, Mr. Plewman served as Co-Founder, President and Chief Executive Officer of diaDexus, Inc. Previously, Mr. Plewman held various positions of increasing responsibility at SmithKline Beecham.

On April 1, 2019, Michael J. Deppe was elected Vice President, Corporate Controller and Chief Accounting Officer. Mr. Deppe, age 53, has served in various account and finance leadership roles since joining the Company in 1998. He served as Vice President, Finance - Enterprise Operations and IT from August 2015 to March 2019, Executive Director, Finance - Financial Planning and Analysis & Management Reporting from January 2013 to August 2015, and as Assistant Corporate Controller from February 2006 to December 2012. Mr. Deppe joined the Company after starting his career at PricewaterhouseCoopers.