SXT DEF 14A Report ended March 12, 2025

Paul J. Romanowski President and Chief Executive Officer Background and Experience Mr. Romanowski has significant leadership experience in the Company and has extensive knowledge of our business. • President and Chief Executive Officer, D.R. Horton, Inc. (October 2023 to present) • Executive Vice President and Co-Chief Operating Officer, D.R. Horton, Inc. (October 2021 to September 2023) • Region President, Florida and Gulf Coast, D.R. Horton, Inc. (2014 to 2021), and five Mid-Atlantic states (2019 to 2021) • Division President, South Florida, D.R. Horton, Inc. (1999 to 2014) • Land Acquisition Manager, M/I Homes (1997 to 1999) • South Florida Director, Metrostudy (1992 to 1997) Mr. Romanowski graduated from Butler University in 1992 with a bachelor of business administration degree in marketing.

Michael R. Buchanan Retired Sr. Advisor, Banc of America Securities Background and Experience Mr. Buchanan has significant commercial banking experience with several banking institutions serving the real estate and homebuilding sectors. • Senior Advisor, Banc of America Securities (2002 to 2003) • Managing Director, Head of National Real Estate Banking Group, Bank of America (1998 until his retirement in 2002) • Executive Vice President of NationsBank, which later merged with Bank of America (1990 to 1998) • Director, Piedmont Office Realty Trust (NYSE: PDM) (2015 to 2021)

Maribess L. Miller Retired Partner, PricewaterhouseCoopers Background and Experience Ms. Miller, a certified public accountant, has significant experience with both public and private companies gained from leading auditing and consulting engagements. • Practice Partner, PricewaterhouseCoopers (PwC) (1984 until retirement in 2009) • Managing Partner, North Texas Market (2002 to 2009) • Practice Leader, the Southwest Region Consumer, Industrial and Energy practice (1998 to 2002) • Managing Partner of PwC’s US Healthcare Audit Practice (1995 to 1998) • Director, Triumph Financial, Inc. (NASDAQ: TFIN) (2014 to present) • Director, Zix Corporation (2010 to 2021)

Elaine D. Crowley Retired CFO, Mattress Giant Corporation Background and Experience Ms. Crowley, a certified public accountant, is an accomplished financial executive with deep expertise in accounting, finance, operational efficiency and public company leadership. • Executive Vice President and CFO, Mattress Giant Corporation (2010 to 2012) • CFO, Michaels Stores, Inc. (2008 to 2010) • CFO, The Bombay Company, Inc. (2000 to 2008) • Various roles including Controller, The Bombay Company, Inc. (1990 to 2000) • Various roles including Senior Manager, Price Waterhouse (now PwC) (1981 to 1990) • Director, Tandy Leather Factory, Inc. (NASDAQ: TLF) (2021 to 2024) • Director, Stage Stores, Inc. (2014 to 2020)

David V. Auld Executive Chairman Background and Experience Mr. Auld has significant experience leading the Company and has unrivaled knowledge of all aspects of our business. • Executive Chairman, D.R. Horton, Inc. (May 2024 to present) • Executive Vice Chair, D.R. Horton, Inc. (October 2023 to May 2024) • President and Chief Executive Officer, D.R. Horton, Inc. (2014 to September 2023) • Executive Vice President and Chief Operating Officer, D.R. Horton, Inc. (2013 to 2014) • Region President, Florida, North and South Carolina, Georgia and Alabama, D.R. Horton, Inc. (2005 to 2013) • Division President, D.R. Horton, Inc. (1988 to 2005) • Texas American Bank (1982 to 1988) and General Dynamics (1979 to 1982) Mr. Auld graduated from Texas Tech University in 1978 with a bachelor of business administration degree in accounting.

M. Chad Crow Retired President & CEO, Builders FirstSource Background and Experience Mr. Crow has significant public company executive leadership experience in the building products industry. • President and CEO, Builders FirstSource (NYSE: BLDR) (2017 until retirement in 2021) • COO, Builders FirstSource (2014 to 2017) • CFO, Builders FirstSource (2009 to 2014) • Various positions including Controller, Builders FirstSource (1999 to 2009) • Various roles, Pier 1 Imports (1995 to 1999) • Various roles, Price Waterhouse LLP (now PwC) (1991 to 1995) • Director, LOAR Holdings Inc. (NYSE: LOAR) (April 2024 to present) • Director, Builders FirstSource (NYSE: BLDR) (1999 to 2021)

Brad S. Anderson Vice Chair of Cushman & Wakefield Background and Experience Mr. Anderson has significant experience in leadership roles in the homebuilding and real estate industries. • Vice Chair of Cushman & Wakefield, a global real estate services firm (2021 to present) • Executive Vice President of CBRE Group, Inc., an international real estate brokerage company (2009 to 2021) • Various leadership positions, CB Commercial Real Estate Group, Inc., (1987 to 2009) • Director, KS StateBank (2016 to present) • Interim Chair of the Board of Continental Homes Holding Corp. (1997 to 1998 when it merged with D.R. Horton)

Benjamin S. Carson, Sr. Former Secretary of U.S. HUD Background and Experience Dr. Carson has significant leadership experience in governmental, regulatory and medical roles. • 17 th Secretary of U.S. HUD (2017 to 2021) • Led programs focused on advancing economic opportunity; providing safe, fair and affordable housing; spurring reinvestment in communities; reducing homelessness; assisting self-sufficiency to underserved and vulnerable populations; and helping disaster victims • Led the collaboration of eight federal agencies to establish the White House Council on Eliminating Regulatory Barriers to Affordable Housing • Distinguished career in the field of medicine including: • Director of the Division of Pediatric Neurosurgery at the Johns Hopkins Medical Institutions (1984 to 2013) • Professor of Neurological Surgery, Oncology, Plastic Surgery and Pediatrics at the Johns Hopkins Medical Institutions (1999 to 2013) • Director Experience: • Galectin Therapeutics Inc. (NASDAQ: GALT) (2023 to present) • Sinclair Broadcast Group, Inc. (NYSE: SBGI) (2022 to present) • Covenant Logistics Group, Inc. (NASDAQ: CVLG) (2021 to present) • Costco Wholesale Corporation (NASDAQ: COST) (1999 to 2015) • Kellogg Company (NYSE: K) (1997 to 2015)

Barbara R. Smith Retired Chairman & CEO, Commercial Metals Company Background and Experience Ms. Smith has significant business leadership and management experience as a public company executive in the metals manufacturing industry. • Chairman of the Board, Commercial Metals Company (NYSE: CMC) (2018 until retirement in 2024) • CEO, Commercial Metals Company (2017 to 2023) • COO, Commercial Metals Company (2016 to 2017) • CFO, Commercial Metals Company (2011 to 2016) • CFO, Gerdau Ameristeel Corporation (2007 to 2011) • CFO, FARO Technologies, Inc. (2005 to 2006) • Various Roles, Alcoa Inc. (1981 to 2005) • Director, Comerica Incorporated (NYSE: CMA) (2017 to present) • Director, Minerals Technologies Inc. (NYSE: MTX) (2011 to 2017)