SL Green Realty (NYSE:SLG) Corp is a New York–based real estate investment trust (REIT) listed on the New York Stock Exchange under the ticker SLG. Founded in 1980 by real estate entrepreneur Stephen L. Green, the company has grown into Manhattan’s largest office landlord. SL Green went public in 1997 and elected to operate as a REIT the following year, positioning itself to focus on acquisition, development and long-term ownership of commercial office properties.
The company’s core business revolves around Class A office buildings in Manhattan’s prime submarkets, including Midtown, the East Side and Downtown. SL Green’s portfolio comprises over 24 million square feet of office space, featuring marquee properties such as One Vanderbilt, a flagship 1,401-foot tower adjacent to Grand Central Terminal. In addition to ground-up development, the firm acquires underperforming assets for strategic repositioning, enhancing value through targeted capital improvements and leasing initiatives.
Beyond office leasing, SL Green operates a streetlevel retail division that manages and leases storefront space to national and regional tenants. Its integrated platform provides property management, building operations and tenant services, supported by in-house leasing, design and construction teams. The company also pursues joint ventures and strategic partnerships to optimize its capital structure and expand selective holdings in adjacent commercial corridors.
Headquartered in Midtown Manhattan, SL Green is led by Chairman and Chief Executive Officer Marc Holliday, who has guided the firm’s growth and development strategy since the mid-2000s. Under his leadership, SL Green continues to leverage its deep market expertise and relationships with institutional investors, financial institutions and leading corporate tenants to maintain its position as a cornerstone landlord in New York City’s commercial real estate landscape.