Prime's numbers growing as two firms expand.

CHICAGO, IL: Prime Group Realty Trust, a Chicago-based real estate investment trust, announced that global law firm, Greenberg Traurig, has agreed to expand its lease by 22,565 s/f and will now occupy 100,975 s/f at the 77 West Wacker Drive office building.

Technology giant, Microsoft, has also agreed to expand its lease by 12,391 s/f, and will now occupy 47,122 s/f at the office building on a newly extended lease.

Gregory L. Gerber and Ari Klein from The John Buck Company represented Greenberg Traurig in its transaction, while Steve Steinmeyer and Chris Kelson of Jones Lang LaSalle represented Microsoft.

"These lease expansions, along with an extension, are in line with our goal of retaining and growing high profile tenants at 77 West Wacker Drive," notes Jeffrey Patterson, president and CEO of Prime Group Realty Trust. "Microsoft and Greenberg Traurig are great tenants and reinforce the building's reputation as a premier office location in downtown Chicago."

77 West Wacker Drive is a 51-story Class A landmark building on the south bank of the Chicago River.

Critically acclaimed as one of the finest quality office buildings in Chicago, it was developed in 1992 and designed by the world renowned Ricardo Bofill in his modern classicism style, with architecture by DeStefano and Partners. The building recently won an Office Building of the Year award from BOMA.