Aby Rosen

In 2012, Sheikh Hamad bin Jassim bin Jaber Al Thani, the former Prime Minister of Qatar, reportedly bought Rosen's 71st Street New York townhouse for $47 million. Rosen is also reported to own a $36 million vacation home in Saint Barthélemy.

In 2011, Rosen bought the A. Conger Goodyear House in Old Westbury, New York on Long Island for $3.4 million. The house was designed and built in 1938 by Edward Durell Stone in the International Style for Anson Conger Goodyear, the first president of the Museum of Modern Art. He completed a several-year renovation of the property. Rosen keeps many of his important pieces of art there, including The Virgin Mother, a 13-ton, 33-foot-high bronze sculpture by Damien Hirst of a pregnant woman, with peeled skin and exposed fetus.

Rosen and partner Fuchs hold a large real estate portfolio in Germany, especially in Frankfurt, his natal city. In early 2007, they bought the headquarters building of the European Central Bank. The company also owns the Swift Haus Jungfernstieg in Hamburg. This portfolio is administered by their office in Frankfurt.

In 2006, Rosen partnered with Ian Schrager, a longtime friend and co-founder of Studio 54, to transform the 123-year-old Gramercy Park Hotel by using minimalist architect John Pawson. In 2014, they put the hotel on the market for $260 million, after completing a 4-year $200 million renovation.

In 2006, Rosen announced plans to develop the site at 610 Lexington Avenue in NYC (situated directly behind the Seagram Building) into a glass hotel and condominium tower to be designed by Sir Norman Foster.

In 2005, Rosen married Dr. Samantha Boardman, a psychiatrist and socialite. Boardman is the daughter of D. Dixon Boardman, who founded the hedge fund Optima Fund Management, and Pauline Pitt, a banking heiress. Boardman graduated from Harvard University and Cornell University medical school. She converted to Judaism. Together, they have had two children Alexander (born 2006) and Vivian (born 2008).

The Lever House Art Collection is a collection of works commissioned by Rosen for display at the Lever House. It is curated by Richard Marshall, an art historian and associate curator for the Whitney Museum in New York. The Lever House Art Collection was inaugurated in 2004 featuring a work by Jorge Pardo. Other works have included: Bride Fight by E.V. Day, Hulks by Jeff Koons, and Hello Kitty by Tom Sachs.

In 1991, he founded the partnership RFR Holding LLC with his childhood friend Michael Fuchs (also a son of Holocaust survivors). Although the real estate market was in a downturn at the time, they had access to capital, initially using properties they each owned in Germany as collateral. Later they leveraged their access to German investors. Their strategy was to purchase large, vacant office buildings in need of an upgrade and hire quality architects to refurbish them to high standards. In the 15 years after RFR Holding was established in 1991, Rosen acquired a large portfolio of office buildings, including the Seagram Building, purchased for $375 million from the Teachers Insurance and Annuity Association in 2000, and Lever House.

Rosen has been married twice. In 1991, he married Elizabeth Mina Wechsler in a Jewish ceremony at The Pierre in Manhattan. Before their separation in 2000 and divorce in 2004, they had two sons, Gabriel "Gaby" (born 1994) and Charles "Charlie" (born 1996).

In 1987, Rosen moved to New York City. He apprenticed at a real estate brokerage firm selling properties to German investors.

Aby J. Rosen (born May 16, 1960) is a West German-born American real estate tycoon living in New York City. He is the co-founder of RFR Holding, which owns a portfolio of 71 properties in United States cities including New York, Miami, and Las Vegas; and Tel Aviv, Israel. Highlights include the Seagram Building, Lever House, W South Beach, The Jaffa, a Luxury Collection Hotel, Tel Aviv, Gramercy Park Hotel, Paramount Hotel, and Miracle Mile Shops at Planet Hollywood Resort & Casino, among other properties. Rosen is also a member of, a founding investor in, and the landlord to the Core Club in New York.

Rosen was born in Frankfurt, West Germany in 1960, the son of Jewish Holocaust survivors. His mother Anni spent World War II hiding in a Belgian farmhouse, while his father Isak was held in concentration camps in Germany and Poland. After the war, his mother became a painter and his father a real estate developer. Rosen attended local schools before going to Wolfgang Goethe University, where he graduated with a business degree. His parents moved to Israel by the 1990s, living in Tel Aviv.