Constellation Constellation is a leading competitive retail supplier of power, natural gas and energy products and services for homes and businesses across the continental United States.

Constellation’s serves more than 100,000 business and public sector customers, including more than two-thirds of the Fortune 100, and nearly one million residential customers.

Constellation, Exelon Companies Debut New Brand

Constellation, Exelon Companies Debut New Brand

Kenneth W. Cornew, EVP & Chief Commercial Officer of Exelon and President & Chief Executive Officer of Constellation discusses the launch of our latest miles...


10 S Dearborn St
Chicago, IL

Opening Hours

Monday 08:00 - 21:00
Tuesday 08:00 - 21:00
Wednesday 08:00 - 21:00
Thursday 08:00 - 21:00
Friday 08:00 - 21:00
Saturday 09:00 - 18:00


(312) 566-7927


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avoid constellation at all costs... never tells the truth... will cost you much much more plus fees and charges... customer service is the lowest of any esco company me anytime for proof...
Wow! These people can't read. You have the proper sign up telling them not to bother you. They still knock and ring the bell! Call their customer service people and the agent will continue the harrassment. I will NEVER consult you for my energy needs!!