SL Green Office Leasing Volume Exceeds 1.9 Million Square Feet
One Madison Avenue Occupancy Increased to 91.2%
NEW YORK, Oct. 15, 2025 (GLOBE NEWSWIRE) -- SL Green Realty Corp. (NYSE: SLG), Manhattan’s largest office landlord, today announced that the company has signed Manhattan office leases totaling 1,924,364 square feet to date in 2025, while maintaining a current pipeline of more than 1.0 million square feet.
Notable leases signed during the third quarter and to date in the fourth quarter of 2025 include:
- At One Madison Avenue:
- Harvey AI Corporation, a cutting-edge Domain-specific AI for law firms, professional service providers, and Fortune 500 companies, signed a new 10-year lease covering 92,663 square feet on the entire 6th floor. The tenant was represented by Joseph Messina and Todd Stracci at JLL, and the landlord was represented by Paul Glickman, Alexander Chudnoff, Ben Bass and Diana Biasotti of JLL.
- A financial services company signed a 10-year expansion lease covering 92,663 square feet on the entire 5th floor. The tenant was represented by Todd Stracci of JLL, and the landlord was represented by Paul Glickman, Alexander Chudnoff, Ben Bass and Diana Biasotti of JLL.
- Sigma Computing, Inc, a cloud-native BI and analytics platform that empowers business users to dive into data and make discoveries without needing SQL expertise, has signed a new 11-year lease covering 64,077 square feet on a portion of the 3rd floor. The tenant was represented by Brent Ozarowski of Newmark, and the landlord was represented by Paul Glickman, Alexander Chudnoff, Ben Bass and Diana Biasotti of JLL.
- These three transactions have increased the leased occupancy at One Madison Avenue to 91.2%.
- Harvey AI Corporation, a cutting-edge Domain-specific AI for law firms, professional service providers, and Fortune 500 companies, signed a new 10-year lease covering 92,663 square feet on the entire 6th floor. The tenant was represented by Joseph Messina and Todd Stracci at JLL, and the landlord was represented by Paul Glickman, Alexander Chudnoff, Ben Bass and Diana Biasotti of JLL.
- The NYS Office of General Services has signed a 15-year expansion lease covering 66,106 square feet on the 44th and 46th floors at 919 Third Avenue. This increases the tenant’s total commitment within the building to 117,390 square feet. The tenant was represented by Stephen Siegel, Liz Lash, Peter Larkin and Mark Bezold and at CBRE. The landlord was represented by Robert Alexander, Ryan Alexander, Emily Chabrier, Taylor Callahan, Alex D’Amario and Nicole Marshal at CBRE.
- Teneo Holdings LLC, a global CEO advisory firm, has signed a 10-year renewal lease covering 46,551 square feet on the entire 4th floor at 280 Park Avenue. The tenant was represented by Matthew McBride of CBRE.
- Sagard Capital Partners Management Corp., a global multi-strategy alternative asset management firm, has signed a 10-year renewal and expansion lease covering 40,516 square feet on the 33rd and 34th floors at 280 Park Avenue. The tenant was represented by Noel Flagg and E.N. Cutler of Newmark, and the landlord was represented by Peter Turchin, Gregg Rothkin, Hanna Gerard and Brad Auerbach at CBRE.
“Tenant demand remains robust in both Midtown Manhattan and Midtown South," said Steven Durels, SL Green’s Executive Vice President, Director of Leasing and Real Property. “Rents are rising as supply tightens in both of these submarkets, with particular strength in the Park Avenue and Sixth Avenue corridors.”
About SL Green Realty Corp.
SL Green Realty Corp., Manhattan's largest office landlord, is a fully integrated real estate investment trust, or REIT, that is focused primarily on acquiring, managing and maximizing the value of Manhattan commercial properties. As of September 30, 2025, SL Green held interests in 53 buildings totaling 30.7 million square feet. This included ownership interests in 27.1 million square feet of Manhattan buildings and 2.7 million square feet securing debt and preferred equity investments.
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