Talk America Holdings Inc. of Reston agreed to buy LDMI Telecommunications, a communications provider serving business and residential customers primarily in Michigan and Ohio. Talk America will pay $24 million in cash and issue 1.8 million shares of its common stock for a total purchase price of $47.17 million.

SafeNet Inc., a Belcamp, Md., information security company, agreed to buy MediaSentry Inc., a New York provider of anti-piracy and business management services for the recording and motion picture industries. SafeNet paid $20 million in cash and stock.

LanpherWilson Corp., a Reston consulting firm, bought Computer Forensic Group Inc. of Germantown to form a new company called Turiss, an information security firm. Terms were not disclosed.

Institutional Shareholder Services, a Rockville provider of proxy voting and corporate governance advice, acquired the corporate governance unit of Deminor International in Belgium for an undisclosed sum.


TX-11 Acquisition LLC, a wireless company set up by Alexandria venture firm Columbia Capital, sold $5.5 million of LLC ownership units to eight investors, according to a Securities and Exchange Commission filing. Columbia and M/C Venture Partners of Boston were listed as beneficial owners. According to the filing, $5 million of the proceeds were used in an acquisition. The filing indicated TX-11 intended to raise up to $10.5 million.

Telarix Inc., a Vienna business software company, sold $6.5 million in Series B convertible preferred stock to four investors, according to an SEC filing. Venture firms Edison Venture Fund of McLean and SpaceVest of Reston were listed as beneficial owners.

Arlington Capital Partners, a Washington-based, $450 million buyout fund, bought Thermal Solutions Inc., a privately held seller of thermal management and electronics equipment to defense and aerospace companies. Terms were not disclosed. New Hampshire-based Thermal Solutions was Arlington's seventh acquisition over the past 12 months.

Carlyle Group, a Washington buyout and venture capital firm, hired Sandra J. Horbach as a managing director and head of its consumer/retail sector group. Horbach worked for 14 years at buyout firm Forstmann Little & Co.

I2S Inc., a Columbia information technology company, sold $500,000 of Series B convertible preferred stock to five investors, according to an SEC filing. Washington venture firm Grosvenor Funds is listed as a beneficial owner.

Eka Systems Inc., a Germantown wireless communications company, sold $3.6 million of Series B convertible preferred stock to five investors, according to an SEC filing.

JMI Management Inc., a Baltimore venture firm, sold to 31 investors $130 million in partnership interest in its JMI Equity Fund IV LP, a fund to make investments in the software and business services industry, according to an SEC filing. The filing indicated JMI Equity planned to raise up to $300 million.


Comstock Homebuilding Cos. of Reston registered to sell 2.9 million shares of common stock in a secondary public offering. Of the shares being offered, 650,000 are being sold by three existing investors: company president Gregory V. Benson and investors Lawrence Golub and James Keena.

Compiled by Terence O'Hara and Bloomberg News.