of the Board and majority shareholder of BOK Financial; President and principal owner of GBK Corporation, parent of Kaiser-Francis Oil Company (independent oil and gas exploration and production company); founder of Excelerate Energy and Argonaut Private Equity.

Alan S. Armstrong

Chief Executive Officer, President, and a Director of The Williams Companies, Inc. since January 2011. From 2002 until January 2011, Mr. Armstrong was Senior Vice President – Midstream and acted as President of Williams’ midstream business. Since January 2011, Mr. Armstrong has served as Chairman of the Board and Chief Executive Officer of Williams Partners GP LLC, the general partner of Williams Partners L.P. (subsidiaries of Willams), where has was Senior Vice President – Midstream from February 2010, and Chief Operating Officer and a director from 2005.

Charles Frederick Ball Jr.

SeniorChairman of Bank Of Texas (BOT) and formerly its Chairman, CEO & President. Before joining BOT in 1997, he was Executive Vice President of Comerica Bank-Texas and later President of Comerica Securities, Inc.

Peter C. Boylan III

CEO of Boylan Partners, LLC (investment management and advisory organization) since March 2002. From April 2002 through March 2004, Mr. Boylan served as Director, President and Chief Operating Officer of Liberty Broadband Interactive Television, Inc. (global technology provider), a company controlled by Liberty Media Corporation. Prior to April 2002, Mr. Boylan was Co-President, Co-Chief Operating Officer, Member of the Office of the Chief Executive Officer, and Director of Gemstar-TV Guide International, Inc. (media, entertainment, technology and communications company).

Steven Glen Bradshaw

President and Chief Executive Officer

Steve Bradshaw is president and CEO of BOK Financial Corporation,