Parrillo, Weiss & O’Halloran Signs Renewal and Expansion Lease with
Prime Group Realty Trust in The United Building at 77 West Wacker Drive

High-Profile Law Firm to Lease More Than
31,000 Square Feet in Trophy Office Building in Chicago

CHICAGO--(BUSINESS WIRE)--Prime Group Realty Trust (NYSE:PGEPRB), a Chicago-based real estate investment trust, today announced that law firm Parrillo, Weiss & O’Halloran renewed its 22,745-square-foot lease, and has expanded to the penthouse floor with an additional 8,323 square feet, in The United Building.

The firm is one of the most loyal tenants in the building, which is located at 77 West Wacker Drive in Chicago, occupying space in the trophy quality Class A building since its inception 15 years ago. Parrillo, Weiss & O’Halloran will now be leasing a total of 31,068 square feet of the building’s approximately 960,000 square feet.

Known as one of the most coveted buildings in Chicago and admired for its ideal location in the central Loop and abundance of amenities, The United Building has been named one of the top office buildings in the nation by the Building Owners and Managers Association (BOMA) for 2007.

David Stein, managing principal of Steinco, Inc., represented the tenant. Steven R. Baron, executive vice president of Prime Group Realty Trust, represented the landlord.

“Parrillo, Weiss & O’Halloran has been a highly respected tenant of ours since 1992, and we’re overjoyed the firm is continuing to grow at The United Building,” said Baron.

Boasting a modern classicism style of architecture of ancient Greece and Rome and the Italian Renaissance, the museum-quality building was designed by Ricardo Bofill of Barcelona, with architecture by Chicago architect James DeStefano. Other prestigious tenants also lease space in The United Building, including United Air lines, Wachovia and Microsoft, as well as other prominent international law firms.