The Barbarian Group, a New York-based digital services firm, has leased 4,656 square feet at 129 South St. in Boston.

The company will move from Boston’s Newbury Street to occupy the second floor of the 47,000 square foot, six-story office building.

James Topper and Brandon Leitner of CresaPartners in Boston represented The Barbarian Group. The landlord, Winhall Cos., was represented by Stephanie T. Richard and Michael S. Edward of Lincoln Property Co.