NEW YORK, March 28, 2023 (GLOBE NEWSWIRE) -- SL Green Realty Corp. (NYSE: SLG), Manhattan’s largest office landlord, today announced that Palo Alto Networks, a leader in global cybersecurity, has signed a long-term lease covering an entire tower floor at One Madison Avenue, bringing SL Green’s 2023 signed office leasing volume to 491,913 square feet, while the Company’s office leasing pipeline has increased to over 1.0 million square feet, up from a 700,000 square feet pipeline just three weeks ago.