LaSalle St., a family of wealth management firms encompassing an independent broker-dealer and two registered investment advisor platforms based in Chicago, has acquired Horwitz & Associates, a Deerfield, Ill., financial firm with $550 million in client assets.

Horwitz & Associates was previously an OSJ under Western International. It will continue to operate its RIA, EA Horwitz & Associates.

Founded in 1970 by Gerald Horwitz, Horwitz & Associates provides financial, retirement planning and asset and wealth management services to its pre-retiree, retiree and business owner clients with a 13-member multi-generational team. In addition to Illinois, the firm has offices in Arizona, Florida, Louisiana and Ohio.

“Our firm has evolved significantly over the years, and we are thrilled to start this next chapter of our growth with LaSalle St.,” Horwitz said in a statement. “We needed a partner who understood and respected our culture, approach and dedication to our history that simultaneously positioned us for the future.”