In 2013, Firstmark Credit Union acquired Southside Credit Union to develop and strengthen their relationships with members throughout south San Antonio. Firstmark gained 3 additional financial centers branches through the expansion. Additionally, Firstmark acquired St. Joseph’s Credit Union in 2015, expanding Firstmark’s member base and helping the credit union achieve over $1 billion in assets. St. Joseph’s Credit Union was originally chartered in 1933 to support the catholic communities in San Antonio, Del Rio, and Fredericksburg. With both mergers, members of these communities were able to take advantage of the expanded products and services available, technology, and larger ATM network that Firstmark provides.