Roundy's, a Midwest supermarket chain with 158 stores in Wisconsin, Minnesota and Illinois, filed on Monday with the SEC to raise up to $230 million in an initial public offering. Roundy's operates under the Pick 'n Save, Rainbow, Copps, Metro Market and Mariano's Fresh Market banners. The Milwaukee, WI-based company, which was founded in 1872, booked $3.8 billion in sales for the 12 months ended October 1, 2011. Roundy's has not yet chosen an exchange or ticker. Credit Suisse and J.P. Morgan are the lead underwriters on the deal. No pricing terms were disclosed.