Midwest Regional Leader Anders Minkler & Diehl LLP announced plans to add Huber, Ring, Helm & Co., to its practice.

AMD’s partners and HRH’s principals have already agreed to the combination but they are now awaiting final approval. The deal is expected to close by Jan. 1, 2013.

“This merger will bring together two firms of significant scope to offer an unprecedented local emphasis on serving privately-held businesses and individual clients,” AMD’s managing partner Robert Minkler said in a statement. “The combination of these two great organizations provides us with the opportunity to continue to deliver the exemplary service and personal attention we are known for individually, but from a position of greater size and strength collectively.  This merger allows us to retain our commitment to remain a local firm, while being one of the largest firms not only in the St. Louis marketplace, but throughout the Midwest.”

The firms, which were both established in 1965, have agreed to take on the new name Anders Minkler Huber & Helm LLP and will be marketed as Anders under a new brand platform.

The new firm will have more than 160 partners and staff members, with roughly $26 million in revenue.

HRH makes the first large merger for AMD since its inception. In August, AMD added Barnes Sports Group to its Sports, Arts & Entertainment Group (see: Practice Profile: Making the Connection). HRH had the opportunity to merge several smaller firms into their practice in the late 1980s and 1990s.