Platinum-Backed McGraw Hill Files for IPO Showing Narrowing Loss Platinum Equity-backed McGraw Hill Inc. filed for an initial public offering, a sign that private equity firms are resurfacing to take more of their portfolio companies public. Related Posts:Ex-Nielsen Unit Files for US IPO That Could Target…Ryan Reynolds’ Ad Firm MNTN, Holders Raise $187…Philippine Fintech GCash to Split Stocks Ahead of…Chime, Backers Raise $864 Million in Above-Range IPOLG Electronics Is Said to Consider Resuming IPO of…Ryan Reynolds’ MNTN Weighs IPO Launch Soon as Next WeekSee also Ex-Nielsen Unit Files for US IPO That Could Target Up to $1.25 Billion