Executive Team

Brent W. Clum has served as our Chief Financial Officer since the founding of MorningStar in June 2012, and will serve as Co-Chief Executive Officer, Chief Financial Officer, and as a Director. He has served as our President of Business Operations since January 2023 and Director of MorningStar since October 2012. Mr. Clum served as Chief Financial Officer and Director of Southland from February 2015 until January 2020. Since August 2010, he has served as Chairman of the Finance and Audit Committee of Rangers Baseball Express. He served as Senior Vice President and Treasurer of XTO until the Exxon acquisition. Prior to joining XTO, Mr. Clum worked as a portfolio manager at Luther King Capital Management, served as a Managing Director at Invesco and was an Analyst for T. Rowe Price and Associates. He graduated from Baylor University with a Bachelors in Business Administration in Finance, Accounting and Marketing and from the Harvard Graduate School of Business with a Master’s in Business Administration. He is a CPA and a chartered financial analyst (“CFA”).

Gary D. Simpson will serve as Co-Chief Executive Officer and as a Director. Mr. Simpson has also served as our President of Production and Development since November 2024, Senior Vice President of the General Partner since January 2023, and has been a consultant at the Partnership since its founding in 2012. Prior to joining the Partnership, Mr. Simpson served as Senior Vice President of Investor Relations & Finance and board member at XTO Energy Inc., prior to its acquisition by ExxonMobil Corporation in 2010. Mr. Simpson’s prior company affiliations include XTO Energy Inc., Simpson Oil & Land Company, Arco International Oil & Gas, Inc. and ExxonMobil Corporation. Mr. Simpson received a Bachelor of Science, magna cum laude, in Petroleum Engineering from Texas A&M University in 1985 and a Master of Fine Arts from the American Film Institute in 1996. Mr. Simpson is the nephew of Bob R. Simpson, Chief Executive Officer, Chairman and Director of the Partnership.

Keith A. Hutton will serve as our Executive Vice President and as a Director. He previously served as the Chief Executive Officer of MorningStar and has served as Director of MorningStar, in each case, since its founding in June 2012. Mr. Hutton served as Director of Southland from February 2015 until January 2020. Mr. Hutton also served as Chief Executive Officer and Director of XTO until the time of the Exxon acquisition. He remained a consultant with Exxon until January 2012. Mr. Hutton held various management positions for XTO over his 25 year career and was promoted to CEO in December 2008. Prior to joining XTO Energy in 1987, Mr. Hutton was employed with Sun Oil Company in both the international and domestic divisions for five years. He graduated from Texas A&M University with a B.S. in Petroleum Engineering and was named a Harold Vance Department of Petroleum Engineering Distinguished Graduate in 2009.

Scott T. Agosta will serve as our Chief Accounting Officer. He has served as Chief Accounting Officer and Controller of MorningStar since its founding in June 2012. He also served as Chief Accounting Officer and Controller of Southland from August 2017 until January 2020. He served as Vice President—Financial Reporting of XTO from February 2005 until the Exxon acquisition in March 2012. Additionally, Mr. Agosta has served as a Board Member of the Junior Achievement of the Chisholm Trail since August 2009. Prior to joining XTO, Mr. Agosta worked as the Manager—Financial Reporting and Analysis at Devon Energy Corporation, served as Manager—Financial Reporting at Albemarle Corporation and was an Audit Manager at KPMG. He graduated from Louisiana State University with a B.B.A in Accounting. He is a CPA.