The St. Regis Hotel sold for $47 million. The 193-room hotel at 16th and K streets NW was sold by Starwood Hotels and Resorts Worldwide to a joint venture of Brickman Associates and New Valley Corp. Starwood's St. Regis Hotel and Resorts will continue to manage the hotel.

XM Satellite Radio Holdings signed an agreement with Altec Lansing Technologies, which will make speakers to be used with the District company's satellite radio receivers outside subscribers' automobiles.

Marriott International of Bethesda said its 179-room Courtyard Silver Spring Downtown has opened at 8506 Fenton St., Silver Spring.

BioVeris of Gaithersburg reached a license agreement with Baxter Healthcare for exclusive patent rights to Baxter vaccine candidates for the organisms that cause diseases including strep throat, meningitis and anthrax.

General Dynamics Robotic Systems is building a manufacturing plant in Westminster that is to provide about 135 jobs over four years. The state and Carroll County are contributing financial incentives totaling about $700,000 to support the plant, which will play a role in building the ammunition system for the Stryker Mobile Gun System, the Army's new combat vehicle.

Proxicom of Reston, an affiliate of Gores Technology Group, bought Daou Systems for about $21.6 million before transaction expenses. Daou Systems, of Exton, Pa., designs information technology systems for health care organizations.

3001, a company that performs geospatial work for government agencies, moved its headquarters from Sulphur, La., to Fairfax.