subsidiary of exelon industry energy founded 1816 as the gas light company of baltimore later the consolidated gas light electric power company of baltimore city headquarters baltimore maryland u.s. key people mayo a. shattuck iii former president and ceo products electricity natural gas revenue 13.76 billion 2011 1 website www.constellation.com bg & e constellation energy s regulated utility calvert cliffs nuclear power plant in calvert county s lusby maryland constellation energy group former nyse ticker symbol ceg headquartered in baltimore maryland was an energy producer trader and distributor . the company operated over 35 power plants in 11 states mainly maryland pennsylvania new york west virginia and california under its operating and holding company constellation energy group . constellation energy s regulated utility baltimore gas and electric company operated in central maryland . constellation energy was a fortune 500 company and was one of the top electricity producers in the united states . in april 2011 exelon of chicago announced its intention to purchase constellation energy . the acquisition was approved by ferc and the companies officially combined on march 12 2012 with constellation energy taking the exelon name and the corporate headquarters moving to exelon in chicago illinois . before its departure constellation energy was the only remaining fortune 500 company headquartered in baltimore . the competitive and wholesale energy supply business of constellation energy would become a subsidiary of exelon re branded as constellation an exelon company . baltimore gas and electric formerly the regulated utility of constellation energy would become a regulated utility operating under exelon utilities . 2 contents 1 services 2 awards 3 joint ventures and acquisitions 4 environmental record 5 archives 6 see also 7 references 8 external links services edit constellation energy with 2007 revenues of 21 billion was the nation s largest competitive supplier of electricity to large commercial and industrial customers and the nation s largest wholesale power seller . constellation newenergy a wholly owned subsidiary of constellation energy was a leading competitive supplier of electricity natural gas and energy related services to commercial industrial and institutional customers throughout north america . constellation newenergy served more than 19 000 customers throughout 31 states and three canadian provinces representing nearly 8 000 megawatts of peak load and more than 354 billion cubic feet 1.00 1010 m3 of annual natural gas consumption . constellation generation group owned approximately 9 000 mw of generating capacity from power and fuel processing facilities in seven states and generated more than 52 million mw hours per year . its generation portfolio included plants powered by nuclear coal natural gas oil and renewable fuels . 3 constellation commodities group conducted energy trading operations by trading a diverse portfolio of electricity natural gas and other energy products under both short and long term contracts to energy users including utilities and other energy marketers . 4 constellation energy s regulated utility baltimore gas & electric company or bg & e later shortened further to bge delivered electricity and natural gas to approximately 1.2 million customers in the central maryland region . awards edit constellation energy employed almost 10 000 people . it was named 2004 energy company of the year in the platts global energy awards and was chosen by its peers as the best in the energy industry when it was awarded most admired energy company of 2004 . joint ventures and acquisitions edit on september 15 2005 constellation energy announced a new joint venture unistar nuclear with areva to market the european pressurized reactor epr in the usa . constellation energy had withdrawn its lusby maryland and oswego new york sites from the nustart consortium finalist list . however both sites desire new nuclear units see nuclear power 2010 program . on december 19 2005 fpl group inc. owner of florida power and light company in jacksonville announced the acquisition of constellation energy in a merger transaction valued at more than us 11 billion as well as the fact that it would adopt constellation energy as its name for the post merger entity . the merger was canceled on 25 october 2006 . 5 on july 1 2008 constellation energy bought uranium trading firm nufcor international from anglogold ashanti and firstrand international . 6 pursuant to a 2007 agreement the french power company edf is permitted to purchase up to 9.9 % of constellation energy s stock . 7 as of 2008 edf owned 9.5 % of the stock . 7 after constellation energy was reported to have had exposure to lehman brothers following that investment banking firm s bankruptcy filing following the great recession of late 2008 constellation s stock went down 56 % in the first day of trading having started at 67.87 . the massive drop in stocks led to the new york stock exchange halting trade of constellation . the next day as the stock plummeted as low as 13 a share the company announced it was hiring morgan stanley and ubs to advise it on strategic alternatives suggesting a buyout . while french power company electricite de france who already owned 9.5 % of constellation s shares bid for the company 8 constellation ultimately agreed to a buyout by midamerican energy part of billionaire warren buffett s berkshire hathaway company . 9 10 11 on december 17 2008 constellation energy has canceled its merger with berkshire hathaway instead opting to sell its nuclear energy assets to edf . 12 in april 2010 constellation energy has closed its agreement with clipper windpower to acquire the criterion wind project in garrett county maryland and to purchase 28 clipper liberty 2.5 mw wind turbines for the project . construction of the project was completed in december 2010 . on april 28 2011 exelon corporation which was a merger of unicom the former commonwealth edison electric utility in chicago illinois founded 1907 ; and peco the former philadelphia electric company in pennsylvania founded 1881 announced its intention to purchase constellation energy which was completed on march 12 2012 . as a result of the acquisition exelon would take ownership of constellation s assets and business units . 13 on may 27 2011 constellation energy announced its intention to purchase startex power which was completed on june 1 2011 . 14 environmental record edit the political economy research institute ranks constellation energy s parent company exelon corp 75th among corporations emitting airborne pollutants in the united states . 15 archives edit part of the archives of the baltimore gas & electric company and the former consolidated gas light electric power company of baltimore city and its ancient predecessor the gas light company of baltimore are held by the baltimore museum of industry on key highway on the southeastern end of the inner harbor . the baltimore gas & electric company s photographic collection consists of approximately 250 000 photographic prints and negatives in more than 50 000 series . http www.thebmi.org page image database see also edit calvert cliffs nuclear generating station on the chesapeake bay calvert county ; lusby maryland conemaugh generating station ginna nuclear generating station keystone generating station nine mile point nuclear generating station safe harbor dam on the susquehanna river pennsylvania references edit securities and exchange commission . sec . http www.constellation.com about constellation pages exelon constellation merger.aspx constellation generation group . hoovers . constellation commodities group . hoovers . fpl constellation cancel planned merger . reuters . retrieved 2006 10 25 . us power company buys up uranium trader . world nuclear news . 2008 07 01 . retrieved 2008 07 08 . a b sec sc 13d filing general statement of beneficial ownership . 2008 09 08 . retrieved 2008 09 10 . france s edf pulls drops bid for us constellation . ap . international herald tribune . 2008 10 15 . retrieved 2008 10 17 . desmond maurna 2008 09 17 . lehman ties dim constellation . forbes . retrieved 2008 09 19 . thomson victoria 2008 09 19 . power deal delivers new star to buffett s energy constellation . the scotsman . retrieved 2008 09 19 . gaffen david 2008 09 18 . buffett shoots for falling constellation . the wall street journal . retrieved 2008 09 19 . constellation calls off buffett deal agreement on edf s nuclear bid scuttles 4.7 billion midamerican offer . the baltimore sun . 2008 12 17 . retrieved 2008 12 17 . exelon constellation energy to merge . hydroworld . pennwell corporation . 2011 04 28 . retrieved 2011 04 28 . constellation energy acquires startex power pdf . startex power . 2011 05 27 . peri toxic 100 air polluters 2013 . political economy research institute . retrieved 20 november 2015 . external links edit constellation energy retrieved from https en.wikipedia.org w index.php title constellation energy group & oldid 743279714 categories companies listed on the new york stock exchangepower companies of the united statescompanies based in baltimorenuclear power companies of the united statesexelonhidden categories pages using infobox company with unsupported parameters 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 deutschfran ais edit links this page was last modified on 8 october 2016 at 23 20 . text is available under 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