Overseas Union Bank (OUB) was a prominent financial institution in Singapore, established in 1951. It offered a wide range of banking services, including personal banking, corporate banking, and investment services. OUB played a significant role in the development of the banking sector in Singapore and was known for its customer-centric approach. In 2001, OUB merged with United Overseas Bank (UOB), one of the largest banks in Singapore. This merger aimed to enhance the competitive position of both banks and expand their service offerings. Following the merger, the OUB brand was gradually phased out, and UOB continued to operate as a leading financial institution in the region.