Press Release

Macquarie Group completes acquisition of wholesale electric marketing and trading portfolio from Integrys Energy Services

Houston, 01 April 2010

Macquarie Group (“Macquarie”) (ASX: MQG; ADR: MQBKY) today announced that its subsidiary, Macquarie Energy LLC, has completed the acquisition of substantially all of the wholesale electric marketing and trading portfolio (“Portfolio”) of Integrys Energy Services, Inc.

The Portfolio consists of various power transactions, products and trading positions, including physical forwards, financial transmission rights and derivatives. The electric portfolio of Integrys Energy Services has had an average total volume in excess of 125 million megawatt-hours (MWh) over the past 3 years.

Headquartered in Houston, Macquarie Energy was formed following the merger of Macquarie Cook Power and Macquarie Cook Energy in February 2010. Macquarie Energy’s electricity trading and marketing business services North American electricity producers, utilities, municipalities, industrial users and other wholesale energy sector participants.

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