Samuel A. Di Piazza, Jr. is the current chairman of Warner Bros. Discovery (WBD) and is the former Global Chief Executive Office of PricewaterhouseCoopers International Ltd of PricewaterhouseCoopers. He assumed the Chairmanship of WBD upon the merger of Discovery, Inc and the Warner Media division of AT&T. Prior to assuming this role he served on the Board of AT&T as the Chairman of the Audit Committee. Mr. Di Piazza retired as CEO of PwC Global in September 2009 after eight years of leading the largest professional services firm in the world. Over his thirty-six year career at PwC, he led the US Firm as Chairman and Senior Partner, the Americas Tax Practice, and both the Midwest and New York Metro Practices. After retiring from PwC, Mr. Di Piazza joined Citigroup where he served as Vice Chairman of the Global Corporate and Investment Bank from 2011 until February 2014. In this capacity, he served as the Senior Banker on many of the largest global clients of Citigroup across multiple industry sectors and geographies. He also served in various leadership development roles while at Citi. Mr. Di Piazza has served as the Chairman of the Board of Trustees of The Mayo Clinic from 2014 until early 2021. He currently serves on the Board of Directors of Warner Bros. Discovery, Inc. and ProAssurance, Inc. both NYSE listed companies. He is a member of the Executive Committee of the Board of Trustees of St. Patrick’s Cathedral in New York City, the The Inner City Scholarship Fund of New York City and Seton Education Partners, Inc. He is a Trustee and Executive Committee Member of the Mother Cabrini Health Foundation in New York. He is a past Trustee of the USA Foundation Board of the World Economic Forum, the International Financial Reporting Standards Foundation and the Financial Accounting Foundation, the UN Global Compact and the Partnership for Inner City Education. He served as Chairman of each of the following: Geneva-based World Business Council on Sustainable Development, The Conference Board, Inc. and Junior Achievement Worldwide. Mr. Di Piazza is one of the most highly quoted members of his profession, having presented at the Munich Economic Summit, the World Economic Forum, The National Summit in Detroit, the National Press Club, the St. Gallen Symposium, and numerous academic institutions. He has been widely interviewed in print and broadcast media, including the China Daily, the Financial Times, the Wall Street Journal, CNBC, the New York Times, and is a frequent commentator on issues of corporate reporting, transparency and the many facets of sustainable development. Mr. Di Piazza received a B.S. in accounting from the University of Alabama and an M.S. from the University of Houston. Mr. Di Piazza is the co-author of Building Public Trust: The Future of Corporate Reporting.