BOSTON—Natixis Global Asset Management has signed on to be the anchor tenant at Boston Properties' 888 Boylston St. office tower here and will relocate its US corporate headquarters from 399 Boylston St.

The asset management firm has signed a lease for approximately 128,000 square feet of space in five stories of the 17-story, 425,000-square-foot office building. Natixis will have an option to expand to a sixth floor at the building. Build-out of its space is expected to be completed in the fall of 2017. John Barry and Michael Joyce of Transwestern|RBJ represented Natixis in the transaction.

"We are thrilled to be a part of this exciting project for the City of Boston and the region's economy," says John Hailer, president and CEO of Natixis Global Asset Management, Asia and the Americas. "Boston has always provided an excellent home for Natixis, and we feel fortunate to be able to grow and further expand in this great city."

The property when completed will be the first Back Bay office tower constructed in the area in more than a decade.

“The Prudential Center has helped define the skyline of Boston for more than half a century, and 888 Boylston Street represents a new definition in sustainable building design,” says Boston Properties SVP and regional manager Bryan Koop. “Natixis Global Asset Management has been an important corporate presence in the Back Bay for many years, and we are honored to have them as the lead customer at this exciting project.”