Hammerhead Raising $18 Million

Hammerhead Systems Inc., a Mountain View, Calif.-based data communications equipment vendor, has secured $10 million of an $18 million Series D round, according to a regulatory filing. Return backers include Enterprise Partners Venture Capital, Foundation Capital, Mayfield Fund, Pequot Capital Management. It previously raised around $83 million in total VC funding since its 2002 inception. www.hammerheadsystems.com