The Texas Dow Employees Credit Union was founded by employees of Dow Chemical Company in December 1954, receiving its charter from the State Attorney General that month. Its first organizational meeting was held in the Freeport Junior High auditorium in Freeport, Texas, on January 3, 1955, with memberships available for deposits of up to five dollars. Membership was initially limited to Dow and Ethyl-Dow employees. In 1958, the credit union had 780 members and assets totaling $210,000; by 1971, it had a reported 8,500 members, with assets over $7.5 million. As of June 2017, it has over 263,000 members, with assets of $3.05 billion. In December 2011, the company created TDECU Holdings to manage its subsidiaries: TDECU Insurance, TDECU Wealth Advisors, TDECU Real Estate and Century Oaks Title. Timothy D. Belton was named president and CEO of TDECU Holdings. In October 2012, Stephanie Gale Sherrodd was appointed as TDECU's new president and CEO, replacing Edward Speed, who had served as CEO since 2003.
TDECU Stadium
In July 2014, the University of Houston and TDECU announced a naming rights partnership to rebrand the Houston Cougars' new 40,000-seat football stadium as TDECU Stadium, with TDECU paying $15 million over 10 years for the rights. The deal runs through June 16, 2024 and at the time was the third-most lucrative naming rights deal among NCAA facilities. There is also a mutual option to extend the deal for another five years at an additional $7.5 million after the original 10-year deal expires. It was the first major corporate sports venue sponsorship for TDECU, which previously had deals with the Texas Bowl game, Sugar Land Skeeters of the independent Atlantic League of Professional Baseball, and the Houston Livestock Show and Rodeo.
Some of TDECU's mergers and acquisitions include: a 2011 merger with Bluebonnet Credit Union of Houston; the 2012 acquisitions of Associated Insurance Agency in Houston, Assurance Insurance Agency of Bellville, Texas, and Burridge Insurance Agency of Angleton, Texas; the July 2013 acquisition of 7 branches from Hancock Bank; the 2014 acquisition of 1,200-member employee credit union of FMC Technologies; and a 2014 partnership with James E. Bashaw & Co. to help build TDECU's wealth management business.