RMB Capital is keeping its deal making steak alive with its fourth transaction in 13 months.

The Chicago-based RIA is acquiring Jacobus Wealth Management in Milwaukee in a deal that will add approximately $860 million in assets to RMB's current $8.4 billion AUM. Terms of the deal, which is expected to close on November 30, were not disclosed.

In June, RMB lifted out the investment team from Oakbrook Terrace, Ill.-based IronBridge Capital Management. The RIA acquired VennWell, based in Lake Forest, Ill. in May and bought Colorado-based Greenwood Investment Management last September.

The Jacobus merger comes as RMB continues to expand its family office services practice. Founding partner, CEO and chief investment officer Richard M. Burridge, Jr. calls JWM’s expertise in this area “invaluable” to RMB's efforts.

“We are excited for the opportunity to tap into their investment, planning, and operations resources for the benefit of our clients,” Jacobus CEO Peter Bach said in a statement.

RMB intends to bring all 13 employees from Jacobus’ office over to the firm, including Bach and JWM president and CIO Dan Matola. JWM’s Milwaukee office will be rebranded as RMB Jacobus.

“JWM is well-known in Milwaukee, where the team has established a reputation for the quality of service they provide to their clients,” Burridge, Jr., said in a statement. “My longtime colleague and RMB partner Jeff Pearsall has known senior executives from JWM for more than a decade, and it’s a great fit from a philosophical and cultural perspective.