BOARD OF DIRECTORS

Kenneth C. Frazier

Kenneth C. Frazier

Chairman of the board and chief executive officer, Merck & Co., Inc. Director, Exxon Mobil and PhRMA. Member, Board of Overseers, Weill Cornell Medicine. Trustee, Cornerstone Christian Academy. Our director since Jan. 1, 2011.

Leslie A. Brun

Leslie A. Brun

Chairman and chief executive officer, Sarr Group, LLC (investment holding company). Non-executive chairman, Broadridge Financial Solutions, Inc. and CDK Global, Inc. Director, Hewlett Packard Enterprise Company and NXT Capital, Inc. Our director since July 22, 2008.

Thomas R. Cech, Ph.D.

Thomas R. Cech, Ph.D.

Investigator, Howard Hughes Medical Institute. Distinguished Professor, University of Colorado. Director, BioFrontiers Institute, University of Colorado. Our director since May 27, 2009.

Pamela J. Craig

Pamela J. Craig

Former chief financial officer, Accenture (global management consulting, technology services and outsourcing company). Director, Akamai Technologies and The Progressive Corporation. Our director since Sept. 1, 2015.

Thomas H. Glocer

Thomas H. Glocer

Retired chief executive officer, Thomson Reuters Corporation (information and services company for businesses and professionals). Founder and managing partner, Angelic Ventures, L.P. Director, Morgan Stanley. Member, Supervisory Board, Publicis Groupe. Our director since Nov. 27, 2007.

Rochelle B. Lazarus

Rochelle B. Lazarus

Chairman emeritus and former chief executive officer, Ogilvy & Mather (advertising and marketing communication company). Director, The Blackstone Group L.P. Our director since Oct. 26, 2004.

John H. Noseworthy

John H. Noseworthy, M.D.

President and chief executive officer, Mayo Clinic, and Professor of Neurology, Mayo Clinic College of Medicine & Science (non-profit organization committed to clinical practice, education and research). Our director since May 23, 2017.

Paul B. Rothman, M.D.

Paul B. Rothman, M.D.

Dean of medical faculty and vice president for medicine, The Johns Hopkins University, and CEO, Johns Hopkins Medicine. Our director since Sept. 1, 2015.

Patricia F. Russo

Patricia F. Russo

Chairman, Hewlett Packard Enterprise Company. Former chief executive officer and director, Alcatel-Lucent. Director, General Motors Company and KKR Management LLC (managing partner KKR & Co., L.P.). Our director since Sept. 1, 1995.

Craig B. Thompson, M.D.

Craig B. Thompson, M.D.

President and chief executive officer, Memorial Sloan-Kettering Cancer Center. Director, Charles River Laboratories. Our director since Jan. 2, 2008.

Inge G. Thulin

Inge G. Thulin

Executive chairman of the board, 3M Company. Director, 3M Company and Chevron Corporation. Our director since March 1, 2018.

Wendell P. Weeks

Wendell P. Weeks

Chairman, chief executive officer and president, Corning Incorporated (glass and materials science innovator for the optical communications, mobile consumer electronics, display, automotive, and life sciences industries). Director, Corning Incorporated and Amazon.com, Inc. Our director since Feb. 24, 2004.

Peter C. Wendell

Peter C. Wendell

Managing director, Sierra Ventures (technology-oriented venture capital firm). Faculty, Stanford University Graduate School of Business. Senior advisor and director, WestBridge Crossover Fund, LLC. Our director since Sept. 23, 2003.

Dates prior to the merger of Merck & Co., Inc. ("Merck") and Schering-Plough Corporation ("Schering-Plough") on November 3, 2009, reflect membership on the board of legacy Merck (Brun, Cech, Glocer, Lazarus, Weeks and Wendell) or legacy Schering-Plough (Russo and Thompson), as the case may be.

Committee Assignments

Shareholder Communications with the Board

Code of Conduct: Our Values and Standards

Our code of conduct reflects our corporate values and guides our day-to-day decision making.