CAMBRIDGE, According to SEC filings, stealth-mode startup Gridco has raised $12.5 million from VCs General Catalyst and North Bridge Venture Partners. The firm is headed by Naimish Patel, a former Sycamore Networks executive.

According to tech columnist Scott Kirsner, Gridco is a new start-up that aims to deliver smarter power management technology to utilities and major industrial power consumers. Gridco Systems, doesn't yet have a Web site, and has been operating out of the offices of its investors, General Catalyst in Cambridge and North Bridge Venture Partners in Waltham.