Richrelevance, a site that recommends products to online shoppers, has raised $12.5 million, according to an SEC filing. A rep for the San Francisco company declined to comment on the filing.

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The Richrelevance rep also wouldn’t say whether this filing represented a completely new round of funding, or if it was an add-on to last August’s third round (PDF). By that point, Richrelevance had raised $9 million in total funding since opening its doors in 2005, with backing from by Draper Fisher Jurvetson, Greylock Partners, Tugboat Ventures. Late last month, the company opened a new office in Seattle and brought on one of Amazon’s top engineers, Darren Vengroff, to run it. In the past year, Richrelevance says it has tripled its staff, and has plans for further expansion.