Iomai of Gaithersberg, a biotech company that says it has a proprietary process for delivering vaccines through the skin, registered with the Securities and Exchange Commission for an initial public offering. The company said the number of shares and the price range have not been determined, although the SEC filing listed a maximum offering of $86.25 million.

Provident Bank of Baltimore formed a new Government Contractor Banking Division to expand its business in that sector. It hired Bill Nalls, who has a background in banking for contractors, to run the new unit out of Provident's regional offices at Tysons Corner.

TV One of Silver Spring, a cable network aimed at African American audiences, said it added 1 million households in September, bringing its subscriber total to 23 million.

Watson Wyatt Worldwide, a human-resources consulting firm, acquired Davis, Conder, Enderle & Sloan, a Chicago actuarial and retirement benefits consulting firm, on terms that were not disclosed.

Compliance, a legal project staffing, staging and management company that specializes in handling documents for complex cases, has sold an 80 percent interest in the company to Vedior North America, a personnel recruitment company. Terms were not disclosed.

McNeil Technologies, a Springfield government contractor, acquired ViStar Corp., an Alexandria consulting firm. Terms were not disclosed. ViStar provides management and consulting services to federal agencies including the Defense Department and the State Department.