GOLDMAN Sachs Group Inc Chief Operating Officer Jon Winkelried, whose firm has lost more than half its stock market value this year, has listed his Nantucket estate for sale for US$55 million.

The two-home property on Cathcart Road in the Massachusetts island's Monomoy or "Money-moy" section, is the most expensive estate on the Nantucket market at the moment, said broker Patty Tasch of Nantucket-based Jordan Real Estate, who received a copy of the listing. Aerial photos show a shingle-style gabled home and swimming pool with winding driveway set back from the beach, Bloomberg News reported.

"It's a very desirable neighborhood," said Tasch. "This is about 1.6 kilometers out of town in a place over the harbor and town."

The worst financial crisis since the Great Depression has engulfed Goldman Sachs, which had been the most profitable United States securities firm in history. Goldman's efforts to restore confidence, including becoming a bank holding company and raising US$10 billion from investors including Warren Buffett, have failed to mollify investors.

The stock fell 30 percent last week, bringing its loss since the start of the year to 59 percent.

As part of the investment from Buffett, Winkelried and other top members of Goldman's executive team were prohibited from selling more than 10 percent of the stock they held on September 28 until Goldman bought back Buffett's stock or until October 1, 2011, whichever falls soonest.

The main house on Winkelried's 23 hectares has six bedrooms, a wine room, cedar closets, a billiard room and at least three fireplaces, according to the listing. The second house on the property has four bedrooms and four-and-a-half baths.

As co-president of Goldman Sachs, Winkelried was awarded US$67.5 million at the end of 2007 and US$53 million at the end of 2006, according to company filings. Winkelried owned 2.89 million shares of Goldman as of February 11, according to the firm's 2008 proxy statement.