1976 by samuel zell 1 and headquartered in chicago illinois was the largest owner of office buildings in the united states until the blackstone group acquired them in february 2007 for 23 billion plus the assumption of 16 billion in debt . the acquisition was one of the largest leveraged buyouts . the company now a part of blackstone group operates as equity office management llc . notable properties at the time of acquisition edit chase tower indianapolis chicago civic opera house columbia center frost bank tower one worldwide plaza southeast financial center washington mutual tower san francisco ferry building external links edit official site v t e the blackstone group founders peter george peterson stephen a. schwarzman business services cms computers rgis sungard minority shareholder consumer retail michaels joint control performance food group pinnacle foods united biscuits financial services bankunited minority stake healthmarkets minority stake fgic minority stake healthcare biomet emcure pharmaceuticals investment vanguard health systems industrial freescale joint control kl ckner pentaplast trw automotive control media telecommunications eaccess investment nielsen holdings minority stake axtel minority stake deutsche telekom minority stake tdc minority stake the weather channel minority stake travel & leisure hilton worldwide center parcs europe freehold caesars entertainment corporation minority stake merlin entertainments minority stake seaworld entertainment tragus group travelport real estate extended stay america minority stake equity office luxury resorts lxr la quinta inns & suites retrieved from https en.wikipedia.org w index.php title equity office & oldid 743336498 categories companies based in chicagoprivately held companies based in illinoisblackstone group companiesreal estate companies of the united states navigation menu personal tools not logged intalkcontributionscreate accountlog in namespaces article talk variants views read edit view history more search navigation main pagecontentsfeatured contentcurrent eventsrandom articledonate to wikipediawikipedia store interaction helpabout wikipediacommunity portalrecent changescontact page tools what links hererelated changesupload filespecial pagespermanent linkpage informationwikidata itemcite this page print export create a bookdownload as pdfprintable version languages deutsch edit links this page was last modified on 9 october 2016 at 04 56 . text is available under the creative commons attribution sharealike license ; additional terms may apply . by using this site you agree to the terms of use and privacy policy . wikipedia is a registered trademark of the wikimedia foundation inc. a non profit organization . privacy policy about wikipedia disclaimers contact wikipedia developers cookie statement mobile view