Global investment giant takes over two floors at amenity-packed GM Building

GoldenTree Asset Management, a global firm that manages $56 billion in assets for institutional investors, is growing its Manhattan footprint.The company is expanding from its current offices at 350 Park Ave.

to 60,000 more square feet at BXP’s 767 Fifth Ave.— signing for the entire 43rd and 44th floors at the famed GM Building.GoldenTree founder and managing partner Steve Tananbaum said the GM Building “offers the ideal combination of location, layout and amenities.” The GM Building includes a second-floor, 35,000 square-foot amenities center called Savoy Club, boasting a state-of-the art fitness center and lounges.BXP, formerly known as Boston Properties, bought the tower in 2008.

Its two million square feet are 99.1% leased.Terms of the GoldenTree lease weren’t disclosed.Last year, according to JLL, the tower saw four new leases for more than $100 per square foot, one of which broke the $200 psf barrier....