Platinum Equity-backed Ryerson Holding, which processes and distributes steel, aluminum and other metals in the U.S., Canada and China, filed on Friday with the SEC to raise up to $350 million in an initial public offering. The Chicago, IL-based company, which was founded in 2007 and booked $3.4 billion in sales over the last 12 months, plans to list on the NYSE under the symbol RYI. Pricing terms and timing were not disclosed.
