Yes, Soros Fund Management LLC (888 7th Avenue, 33rd Floor, NY, NY 10106) is now mostly run by his sons, Robert (Deputy Chairman) and Jonathan (Deputy Chairman and President).
His longtime friend and right hand, pro-Palestininan activist Abbas F. "Eddy" Zuaiter, is the COO and Abbas' brother Ahmad F. Zuaiter is also a high level executive in the company; their youngest brother, Waleed F. Zuaiter is a TV and movie actor.
Ref: Soros' latest Gambit - FR, posts #27, 28, 2011 September 12
Best I can tell the Zuaiter brothers are Kuwaiti-Americans. The younger one was born in America. They are probably highly intelligent but even more important they would be bringing large sums of Muslim money into Soros hedge funds. They have the family and ethic connections to do this. George Soros publicly hating Israel helps this. His sons are half Jewish at best they can all go to hell