Wedbush Morgan Securities said Thursday that it has agreed to acquire Peacock, Hislop, Staley & Given Inc., a Phoenix investment bank and securities brokerage firm, for an undisclosed amount.

The Los Angeles-based independent investment bank, which focuses on middle-market companies, said negotiations had been going on for several months and were completed last week.

“The excellent synergy between both firms will allow us to expand our services to our growing client base in the Southwest,” said President Edward Wedbush in a statement.