• More than a year after listing it for $27.9 million, Tommy Hilfiger has finally found a buyer for his 20,000-square-foot manse in Greenwich. The estate, which is known as Stone Hill, was purchased by the fashion mogul for $18 million in 2005. Now an unidentified buyer is taking it off his hands for $20 million. [WSJ]
• Former Ariba CEO Lawrence Mueller and his wife Mary Kay have gone into contract to sell their condo at 15 Central Park West. The three-bedroom spread, which the couple first listed for $16.5 million in May and reduced to $15.5 million in October, went into contract earlier this week. [Cityfile, PDE]
• Alex Acquavella, the son of top NYC art dealer Bill Acquavella and his heir apparent at the tony UES gallery, has paid $3.9 million for an apartment at 50 Gramercy Park North. The two-bedroom spread features a wood burning fireplace and private terrace, along with views of Gramercy Park. [Cityfile]
• Melvyn Blum, a retired EVP at Vornado Realty Trust, has sold his 28th-floor apartment at the Trump International for $6.4375 million. The buyer is technology executive Sanjiv Ahuja and his wife Anju. [Cityfile]

• Sting has put his four-bedroom duplex at 88 Central Park West on the market for with Prudential Douglas Elliman's Claudine DeNiro for $26 million. Update: The listing has gone to Halstead's Mark Friedman, not Claudine DeNiro as per the Times. You can see more details of $19 million listing here. [NYT]
• Icelandic mogul Jon Asgeir Johannesson and his wife, Ingibjorg Palmadottir, have put the top two floors of their penthouse at 50 Gramercy Park North on the market for $25 million. [NYT, Corcoran]
• JPMorgan exec Adam Ansaldi has sold his three-bedroom apartment at 4 East 88th Street to Laurence Mascera, a managing director at Broadpoint Capital, for $3.299 million. [Cityfile]
• Condé Nast is selling off a company-owned apartment at the Promenade at 530 East 76th Street. The five-bedroom condo, which was typically occupied by Jonathan Newhouse when he visited New York, went into contract in late January. It had been listed in December for $4.995 million. [NYT, PDE]