SL Green Realty Corp. has signed two new leases with leading hedge funds, Longacre Fund Mgmt., LLC and Diamondback New York, LLC, at 810 Seventh Ave. Each firm has taken an entire floor of 16,858 s/f at the midtown office tower. Longacre Fund Management is an existing building tenant whose business is rapidly expanding. They will occupy the entire 33rd floor. Diamondback is currently a tenant at SL Green's 1 Landmark Square in Stamford, Connecticut. When they decided to expand into New York City it was natural that they turned to SL Green to assist with their space needs. Diamondback will occupy the entire 37th floor. Steven Durels, executive vice president and director of leasing and real property for SL Green, said, "We're always very pleased to be able to accommodate our existing tenants by meeting their growth needs, particularly when we can take advantage of the obvious synergies that exist within our portfolio, including with our properties outside of New York City. We look forward to continuing to build our relationship with Longacre Management at 810 Seventh Avenue just as we welcome another of our tenants, Diamondback Capital to its new Manhattan headquarters. " With views over New York City and New Jersey, 810 Seventh Ave. is a 41-story, 748,023 s/f office tower located in midtown Manhattan on 53rd St. surrounded by Times Sq., Corporate Row and Central Park. The building's location affords tenants ease of access to shopping and restaurants as well as all major public transportation lines and transportation hubs. Other prominent tenants include Hoplite Capital Management, Alson Capital Partners, Hearst Communications, The National Geographic Society and Practicing Law Institute. Alexander Chudnoff of Cushman and Wakefield represented Longacre Management in its leasing transaction. Chris Mongeluzzo of Newmark & Co. Real Estate, Inc. represented Diamondback Capital.