After building more than a dozen Mariano’s Fresh Markets in the Chicago area since 2010 and then converting 11 former Dominick’s locations, Bob Mariano now boasts 30 wildly popular stores here—and has his eye on other states. The rub? The Milwaukee-based parent company, Roundy’s, is struggling—losing stock value and racking up debt to pay for the expansion. That has led analysts to speculate whether Mariano is preparing to spin off his namesake supermarkets.