Here's a glimpse of what's inside the conglomerate's collection of businesses
One of the largest port operators in the world, it raised $5 billion in an initial public offering—the largest in the Middle East at the time.
Istithmar plowed $100 million into the advisory firm and its investment business, which were founded by ex-Morgan Stanley Vice-Chairman Joseph Perella and Goldman Sachs partner Peter Weinberg.
Dubai World and MGM Mirage are partners on this $8.5 billion Las Vegas development, which includes 67 acres of hotels and condominiums as well as a casino and a shopping center.
BARNEYS NEW YORK
In 2007, Istithmar spent nearly $1 billion on the retailer, which is struggling to pay its debt. Hedge fund Perry Capital, which owns some debt, has been approached by outside investors about a takeover.
W UNION SQUARE
Dubai World, which paid a pricey $1 million per guest room for New York's W Union Square, may lose control of the hotel when some of its debt goes to auction this month.
Nakheel, the Dubai World developer that risks defaulting on more than $3 billion of debt this month, built the palm-shaped island off the Dubai coast. The tourist destination features a shark-filled lagoon.