SAN DIEGO, CA--(Marketwire - Aug 10, 2011) - Sovereign Capital Management Group, a San Diego-based real estate investment company, today announced the purchase of Daymark Realty Advisors Inc., a wholly owned subsidiary of Grubb & Ellis Co. Sovereign partnered with Infinity Urban Century, a New York City-based investment affiliate of Infinity Real Estate. The deal closed on August 10, 2011.