Quark Software Inc., the Denver-based maker of publishing software, has new private equity owners that are prepared to help it grow into a bigger company selling digital publishing automation technology. Los Angeles-based Parallax Capital Partners purchased Quark from its previous owner, Platinum Equity, in a deal that closed this week. Terms were not disclosed. Ray Schiavone, president and CEO of Quark, is staying with the company, as is the rest of the management team and the company's 300...