in part by Blackstone Group, became a public company via an initial public offering on the London Stock Exchange. In August 2010, Blackstone announced it would buy Dynegy, an energy firm, for nearly $5 billion; however, the acquisition was terminated in November 2010. Investments 2011 to 2015 In February 2011, the company acquired Centro Properties Group US from Centro Retail Trust (now Vicinity Centres) for $9.4 billion. The company became Brixmor Property Group and Blackstone sold its remaining interest in the company in August 2016. In November 2011, a fund managed by the company acquired medical biller Emdeon for $3 billion. In late 2011, Blackstone Group LP acquired Jack Wolfskin, a German camping equipment company. In 2017, the company was handed over to its lenders. In August 2012, Blackstone was part of a consortium that financed Knight Capital after a software glitch threatened Knight's ability to continue operations. In October 2012, the company acquired G6 Hospitality, operator of Motel 6 & Studio 6 motels from AccorHotels, for $1.9 billion. In November 2012, the company acquired a controlling interest in Vivint, Vivint Solar, and 2GIG Technologies. In February 2013, 2GIG was flipped to Nortek Security & Control, LLC for $135M. In April 2013, the company discussed buying Dell, but it did not pursue the acquisition. In June 2013, Blackstone Real Estate Partners VII acquired an industrial portfolio from First Potomac Realty Trust for $241.5 million. Part of this portfolio was developed by StonebridgeCarras as Oakville Triangle (Now "National Landing") In September 2013, Blackstone announced a strategic investment in ThoughtFocus Technologies LLC, an information technology service provider. In August 2013, Blackstone acquired Strategic Partners, manager of secondaryfunds, from Credit Suisse. In February 2014, Blackstone purchased a 20% stake in the Italian luxury brand Versace for €150 million. In April 2014, Blackstone's charitable arm, the Blackstone Charitable Foundation, donated $4 million to create the Blackstone Entrepreneurs Network in Colorado. The program encourages increased collaboration among local business leaders with the goal of retaining high-growth companies in the state. In May 2014, Blackstone Group acquired the Cosmopolitan of Las Vegas resort from Deutsche Bank for $1.73 billion. In August 2014, Blackstone Energy Partners acquired Shell Oil's 50% stake in a shale-gas field in the Haynesville Shale for $1.2 billion. In January 2015, Blackstone Real Estate Partners VI announced it would sell a Gold Fields House in Sydney to Dalian Wanda Group for A$415 million.