Firstmark Credit Union (formerly San Antonio Teachers Credit Union) is a federally insured, state-chartered, member-owned, not-for-profit financial cooperative. The credit union was founded by educators in 1932, and changed its name to Firstmark Credit Union in October 2002. Serving over 100,000 members and managing assets of more than US$1 billion, the Credit Union is the fourth largest in San Antonio, Texas’. With sixteen financial centers(including the acquisition of Southside Credit Union and St. Josephs Credit Union), the Credit Union offers a full range of financial products and services, both personal and commercial. Firstmark Credit Union is community-chartered. Membership is open to anyone who lives, works, worships, attends school in Bexar County. Educators, students and their families, in the following 12 surrounding counties are also eligible: Atascosa, Bandera, Comal, Dimmit, Frio, Guadalupe, Kendall, La Salle, McMullen, Medina, Wilson, and Zavala. Firstmark Credit Union is insured by the National Credit Union Administration (NCUA), is an Equal Housing Lender and a member of the Better Business Bureau. Southside Credit Union(2013). Southside Credit Union was chartered in 1996 and largely focused on servicing members in the southern communities of San Antonio. Firstmark Credit Union acquired Southside in November 2013 to develop and strengthen their relationships with members throughout south San Antonio. With the merger, members of these communities were able to take advantage of the expanded products and services available, technology, and larger ATM network. Firstmark also gained 3 additional financial centers branches through the expansion.