Columbia Capital, an early investor in XM Radio, closes its sixth fund

Columbia Capital has raised $437 million for its sixth fund, according to a pair of SEC filings (found here and here).

The Alexandria firm, founded by U.S. Sen. Mark Warner, D-Va., more than 25 years ago, is best known for its early investment in XM Satellite Radio, joining in a $250 million round in 1999 alongside General Motors and Clear Channel Communications.

The firm makes investments primarily in enterprise IT, infrastructure and wireless technology space. It has invested heavily in the D.C. area, including its early funding for Nextel Communications Inc., Broadsoft (IPO’d in 2010), Digital Signal Corp., (acquired by Vistaprint), Millennial Media (IPO’d in 2012), Virtustream, NextNav and Summit IG.

The firm did not return a request for comment, and has only rarely given press interviews. Aside from its founding by a senator, Columbia is also known for actually building its own companies, and in a very literal sense.