Constellation Expands Residential Electricity Choice and Savings to Nearly 600,000 Southwestern Ohio Homeowners

CINCINNATI (June 20, 2013) - Constellation NewEnergy, Inc. ("Constellation"), a business unit of Exelon (NYSE: EXC) and a longtime competitive energy supplier in Ohio, today announced the launch of residential electricity supply in southwestern Ohio with a 12-month fixed price offer to nearly 600,000 consumers that delivers an estimated 14 percent savings over Duke Energy's current price to compare*.

Constellation is offering residential customers a 12-month pricing plan at 5.59 cents/kilowatt-hour (kWh), representing savings of up to 14 percent on the electricity commodity over Duke Energy's current price to compare of 6.52/kWh.*

In addition, new customers will be eligible to receive a $25 gift card†.

"Constellation is thrilled to begin providing southwestern Ohio homeowners with a competitive electricity solution that will help them lower their electricity prices," said Bruce Stewart, senior vice president, Constellation. "By shopping with Constellation, homeowners in the Duke service territory can save now and lock in their rate for a year.

"Constellation is a national energy leader currently serving Ohio residential customers as well as a large base of commercial, industrial and governmental customers in the state," Stewart said. "Our goal is to provide Ohio residential electricity shoppers superior customer care and an easy, hassle-free shopping experience. To enhance the value to customers, later this summer we plan to introduce in the Duke Energy market a dual fuel option that will allow customers to shop with Constellation for electricity and natural gas supply."

Those who make the switch to Constellation can do so with confidence:

• Constellation does not charge a sign-up or enrollment fee;
• Constellation offers a 90-day customer satisfaction period with penalty-free termination
• And fast, easy online and telephone sign-up options

A mailed brochure detailing Constellation's limited time offer to Ohio residential customers will begin arriving in mailboxes in southwestern Ohio in the weeks ahead.

Independent sales representatives, working on behalf of Constellation, will be visiting southwestern Ohio communities to spread the word about the benefits of energy choice. Please watch an educational video with more information on how these independent sales representatives can help customers learn more about the benefits of customer choice and switching to Constellation.

Additional Background on Retail Electricity Choice

Retail electric choice provides customers the opportunity to shop for the best combination of electricity price and customer service to meet their needs. Under Ohio state law, customers are free to switch to a competitive electricity supplier with no impact on their utility service reliability. Consumers who choose to buy electricity through Constellation will experience exceptional customer service. They will see the new Constellation commodity price in the kilowatt-hour (kWh) rate for electric generation service listed on their monthly utility bill. Duke Energy will continue to handle all billing, and will continue to respond to all service inquiries, including queries about outages. Contracts with Duke Energy related to service and maintenance of appliances will not be impacted.

To learn more about retail choice in Ohio, visit the Public Utilities Commission of Ohio web site at www.puco.ohio.gov.

Ohio residential customers wishing to switch their electricity supplier to Constellation can sign up online at shop.constellation.com or call 1-866-938-2140.

^{*DUKE ENERGY OHIO'S RATES ARE SUBJECT TO CHANGE AND, THEREFORE, WE CANNOT GUARANTEE SAVINGS OVER THE FULL TERM OF OUR PRICE PLANS. Our price does not include any taxes, utility distribution charges or other utility fees, charges or credits. Savings are based on Duke Energy's current price of Standard Offer Supply (SOS) for rate class RS (Residential Service) of 6.521 cents per kWh assuming usage of 1500 kWh. Duke Energy's price of SOS for rate class RS from June 1, 2013 - Sept. 30, 2013 is 6.131 cents per kWh for the first 1,000 kWh of usage and 7.301 cents per kWh for usage above 1,000 kWh. Duke Energy's price for SOS includes charges for Generation, Capacity, Alternate Energy Recovery, Transmission, and Supplier Cost Reconciliation. Ohio Supplier License #00-003E6 † Only new customer contracts not terminated within 90 days are eligible for rewards cards. Cards are issued by Citibank, N.A. pursuant to a license from Visa U.S.A. Inc. and managed by Citi® Prepaid Services. Cards will not have cash access and can be used everywhere Visa® debit cards are accepted. Please allow 8-10 weeks after your first bill to receive your card. To check the status of your card or to report lost or stolen cards, please call 1-800-522-7458 or emailhelp@citiprepaid.com.}