MIAMI, NEW YORK and WASHINGTON, Oct. 29, 2025 (GLOBE NEWSWIRE) -- Siebert Financial Corp. (NASDAQ: SIEB) today announced the opening of a Washington, D.C. office to support its expanding Capital Markets and Investment Banking team. Located at 3000 K Street, N.W., Suite 245, Washington, D.C., the new office will be led by Daniel M. Ondeck, Head of Institutional Sales, who works closely with Siebert’s investment bankers on origination and execution across public and private markets, as well as by newly appoin ...