Ambit Energy Now Provides Energy to Illinois

Company to provide electricity service to 3.8 million ComEd customers

DALLAS – June 13, 2011 – Ambit Energy, a national retail energy provider, announced today it
will launch electricity service in the Commonwealth Edison (ComEd) service territory in mid-
June. The company’s offering provides a new electricity choice with affordable rates to
electricity customers in the greater Chicago, Rockford and Joliet areas, servicing more than 3.8
million customers.

“We first entered the Illinois market in 2008 providing alternative gas service to customers in the
NICOR territory and have been recognized as one of the only alternative suppliers to save
customers money over the incumbent provider,” said Jere Thompson Jr., CEO and co-founder
of Ambit Energy. “We’re excited to bring that same value to customers in the ComEd territory as
part of our continued expansion into deregulated markets across the United States.”

Ambit Energy offers retail consumers in ComEd an innovative energy experience including
discounted monthly and term plans with up to 12.4 percent savings, affordable green products
derived from renewable resources, friendly customer service and a free energy program that
allows customers to completely eliminate their monthly bill by referral other customers.

Reaching new customer milestone
The company surpassed 500,000 active customers in the first quarter of 2011. This milestone is
just one of many recent growth achievements Ambit Energy has seen in the past year as it was
named the No.1 fastest growing private company by Inc. magazine.

“We appreciate the efforts of our Independent Consultants who recommend Ambit Energy
service to their friends and family throughout all of the markets we serve today and are pleased
to provide them with new opportunities in Illnois,” said Ambit Energy CMO and co-founder Chris
Chambless. “Our rapid customer growth is a tribute to our company’s people, systems and
processes—and to our commitment to be the finest, most-respected retail energy provider in the

As a retail energy provider, Ambit Energy buys power wholesale and resells it to retail
customers. Customers are acquired by the company’s team of more than 130,000 Independent
Consultants nation-wide. Ongoing customer relationships are supported by a people-focused,
U.S.-based customer care center utilizing the company’s patent-pending technology platform,
Bluenet®, which manages all aspects of the customer life-cycle, from utility transactions
between customers and transmission providers to web-based account management tools that
include tracking and reporting customer referrals for Ambit’s free energy program.

Download the press release: Ambit Energy Now Provides Energy to Illinois