Citizens Security Bank (CSB) was founded in 1990 by a group of local business leaders who had identified the need for a second locally charted and community focused bank in Guam. CSB opened its doors in January 1991 with one branch and six employees. Today CSB has 4 branches and nearly 70 staff.

In February 2007 CSB announced an agreement with ANZ where ANZ would acquire all the shares in CSB. Approval was given for the acquisition to go ahead and on 2 July 2007 Citizens Security Bank formally became a member of ANZ Group.

For more information on Citizens Security Bank, visit their website at csb.com.gu.