The Abu Dhabi Investment Authority (ADIA) is a sovereign wealth fund owned by the Emirate of Abu Dhabi in the United Arab Emirates, established in 1976 by Sheikh Zayed bin Sultan Al Nahyan to manage and invest the emirate's excess oil revenues on behalf of the Government of Abu Dhabi. It replaced the earlier Abu Dhabi Investment Board created in 1967. ADIA's mission is to sustain the long-term prosperity of Abu Dhabi through prudent capital growth via a disciplined investment process. As one of the largest sovereign wealth funds globally, it manages over $1 trillion in assets across a globally diversified portfolio including private equity, real estate, infrastructure, equities, fixed income, hedge funds, and more than two dozen other asset classes. ADIA employs a diverse workforce of over 65 nationalities and operates as an independent investment institution with robust governance, including a Board of Directors and Investment Committee chaired by Tahnoun bin Zayed Al Nahyan, with Hamed bin Zayed Al Nahyan as Managing Director. The fund maintains a secretive and opaque approach to disclosing specific holdings and methodologies, but engages in high-profile investments with prominent investors and companies worldwide. Headquartered in Abu Dhabi, ADIA plays a key role in the emirate's economic diversification beyond oil.