The ultra luxury segment of real estate market has remained fairly strong despite the burst of the housing bubble. Prices on some ultra luxury apartments have recently doubled in New York City.

In order to know more about the successful realtors, Business Insider combed their MlS Listings, reached to the brokers, and listed most successful realtors in 2011 who have made the biggest single-home sales. But it is not s definitive list

Here is those who have made sales above $35 million:

Kyle Blackmon sold Sandy Weill's penthouse to the daughter of a Russian Oligarch for $88 million

David Kramer sold the famed Candy Spelling Mansion to Petra Ecclestone for $85 million

Mary Gullixson handled the sale of the historic Levi Strauss estate in California for $53 million

Ron de Salvo handled the sale of a $40 million mansion in Los Angeles

Serena Boardman and Nancy Elias handled the sale of a $36 million New York duplex

Gary DePersia handled the sale of a $36 million property in the Hamptons

Jade Mills handled the sale of a $35 million mansion in Beverly Hills