Core Insights - SL Green Realty Corp. (SLG) has signed a new lease with Sigma Computing for 64,077 square feet at One Madison Avenue, increasing the property's leased space to 78.1% [1][7] - Year-to-date, SL Green has signed Manhattan office leases totaling 1,260,707 square feet and has a current pipeline of approximately 1 million square feet [1][7] - The leasing momentum in Midtown South is accelerating, with ongoing discussions for a significant portion of the remaining available space at One Madison Avenue [2] Company Overview - SL Green operates with a mono-market strategy focused on the high-demand New York real estate market, characterized by high barriers to entry [3] - The company benefits from long-term leases with tenants that have strong credit profiles, positioning it for stable rental revenues in the long term [3] Recent Performance - In Q2 2025, SL Green signed 46 office leases in Manhattan totaling 541,721 square feet, including a notable lease with Pinterest for 82,812 square feet at Eleven Madison Avenue [4] - Over the past three months, SL Green's shares have increased by 22%, outperforming the industry average rise of 3.2% [4]