The Abu Dhabi Investment Authority (ADIA) is one of the biggest government investment authorities in the world. Founded in 1976, it is responsible for investing all of the Abu Dhabi government's oil revenues and assets in countries across the world. Estimates of its size range from $200 billion to "way north of $500 billion", making it one of the most influential and wealthy players in the global market, considered to be the world’s second largest institutional investor.