Mark B. Sachs

R.J. O'Brien & Associates LLC provides brokerage and clearing services. It offers a range of services to a global network of introducing brokers, as well as to commercial, institutional, international, and individual investors; and agriculture, energy, equity indices, fixed income, foreign exchange, metals, soft commodities, and structured products markets. The company was founded by John V. McCarthy on October 17, 1914 and is headquartered in Chicago, IL.