El Segundo-based Internet Brands has filed for an IPO, saying in a filing with the SEC late Friday that it is looking to raise up to $100M in an IPO on either the NASDAQ Global Market or New York Stock Exchange. The IPO is being underwritten by Credit Suisse and Thomas Weisel Partners. InternetBrands operates a network of vertically focused web sits, including CarsDirect.com, Wikitravel, and ApartmentRatings.com. The firm said in its filing that it generated revenues of $84.8M in 2006. Internet Brands has received funding from Idealab, Foundation Capital, and Clearstone Ventures; Idealab owns about 32% of the company.