Integrys Energy Services, Inc. is now Constellation!

Effective April 1, 2015 Integrys Energy Services, Inc. has changed its name to Constellation Energy Services, Inc. No changes are being made to your contract term, price or terms and conditions of service as a result of this name change. Questions? Please continue to contact your current customer care.

Read the Nov. 1, 2014 press release

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, Illinois
Electric Aggregation Program from Constellation

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save on electricity with Constellation

Electric Aggregation Program

Thank you for participating in the Electric Aggregation Program!

After evaluating the qualifications, experience and price offerings from potential suppliers, the has selected Constellation as its aggregation electricity supplier.

Participation Is Automatic

As an eligible customer, you are automatically enrolled in the program unless you opt-out by . There are no enrollment or switching fees.


Constellation Price

If you want to be part of this program, you do not need to do anything.

If you do not want to participate in this program, you may opt-out online by . For additional questions please call .