NEW YORK, Dec. 06, 2021 (GLOBE NEWSWIRE) -- SL Green Realty Corp. (NYSE:SLG), Manhattan’s largest office landlord, together with its joint venture partner, Stonehenge, today announced the sale of its leasehold interest in 1080 Amsterdam Avenue for a gross sale price of $42.5 million resulting in a gain in excess of $15.0 million.