Williams Insurance in Twentynine Palms will hold an open house to celebrate the expansion of its business. Andrea Williams, an 11-year employee, will be named senior agent at the company’s new Santa Clarita branch location, which is expected to open September 1. The open house will be held from 2 to 4 p.m. THIS Thursday, June 30, at the Twentynine Palms location of Williams Insurance, 6259 Adobe Road. Light refreshments will be served.