Needham, Mass.—Fresh from completing a $40 million cash acquisition of Bitpipe earlier this month, information technology media company TechTarget announced Tuesday that it has secured $15 million in Series C funding. The company raised $70 million in venture capital funding earlier this year. Greg Strakosch, TechTarget CEO, said the company will use the money to fund organic growth, acquisitions and international expansion. Technology Crossover Ventures and Polaris Venture Partners, both of which were already investors in the company, provided the funding. Polaris led TechTarget’s $30 million Series A round and participated in the June 2004 funding round of $70 million, in which TCV was the lead investor.