CI Capital-backed Ply Gem Holdings, which manufactures residential exterior building products for new construction and home repair, filed on Friday with the SEC to raise up to $300 million in an initial public offering. The Cary, NC-based company, which was founded in 2004 and booked $973 million in sales for the 12 months ended April 3rd, 2010, plans to list on the NYSE under the symbol PGEM. J.P. Morgan, Goldman, Sachs & Co., Credit Suisse and UBS Investment Bank are the lead underwriters on the deal. Pricing terms and timing were not disclosed.