Knowledge Networks banks $15.5 million

Market research firm Knowledge Networks has raised $15.5 million in a fourth round of funding, the company announced Thursday. The investors were Oak Investment Partners, Alloy Ventures, Maveron, Meritech Capital Partners and Oak Hill Venture Partners, the company announced Thursday. Menlo Park, Calif.-based Knowledge Networks has raised a total of $99.25 million. The company plans to use the money for operating expenses.