Cortina Business Management to Join Focus Partner Firm Gelfand, Rennert & Feldman

Focus Financial Partners  announced  that it has entered into a definitive agreement under which Cortina Business Management, Inc. ("Cortina Business Management"), a boutique multifamily office and business manager located in Needham, MA, will join Focus partner firm Gelfand, Rennert & Feldman, LLC, a leading multifamily office and full-service business management…