According to The Sapir Organization, WPP's Enfatico has signed a 98,175 s/f lease at 11 Madison Ave. to serve as the firm's worldwide headquarters. "It is wonderful that a new leader in marketing communications, an agency that will be at the forefront of its industry, has selected historic, iconic 11 Madison Ave. It is only fitting for one of the most hotly anticipated companies to be in one of the city's most prestigious properties," said Alex Sapir, president of The Sapir Organization.   Enfatico's  98,175 s/f lease is for 10 years and six months and maintains occupancy at 11 Madison Ave. at 100%. The Sapir Organization was represented by CBRE's team of Howard Fiddle, Brad Gerla and Stephen Siegel. 11 Madison Ave. has been under ownership by The Sapir Organization since 2003. CBRE is the appointed exclusive leasing agent for this 28-story building, which was built in three phases between 1932 and 1950 and was originally developed by MetLife and designed by Everett Ward and Harvey Wiley Corbett.