NPD Group, has signed a new lease at 31 Penn Plaza, occupying 6,228 rentable s/f on a portion of the 4th floor for a seven-year term. The NPD Group provides global information and advisory services to drive better business decisions. By combining unique data assets with unmatched industry expertise, NPD Group helps clients track their markets, understand consumers, and drive profitable growth. Mitch Konsker, Matthew Astrachan and Matt Polhemus of Jones Lang LaSalle represented the landlord, Savanna, while Adam McCostlin and Dirk Hrobsky of DTZ represented the tenant. Tags: