Detroit-founded Clark Hill expanded to the East Coast through a merger in 2013. Now the firm is heading west in the same way, as it is poised to announce its acquisition of Morris Polich & Purdy, a nearly 100-lawyer firm with offices in Las Vegas, Los Angeles, San Diego and San Francisco.

The union will create a firm with nearly 450 lawyers in 16 offices stretching coast to coast. Clark Hill, which ranked No. 167 on The Am Law Second Hundred, brought in $150.5 million in gross revenue last year and had 348 lawyers before its most recent merger, according to ALM Intelligence.