ADIA manages a substantial amount of capital and is one of the world's largest investment funds. Due to its size, the fund has been influential in international finance. In 2008, ADIA co-chaired the International Working Group of 26 sovereign wealth funds that produced the "Generally Accepted Principles and Practices of sovereign wealth funds" (known as the
Santiago Principles). These principles were created to demonstrate to home and recipient countries and the international financial markets that sovereign wealth funds had robust internal frameworks and governance practices and that their investments were made only on an economic and financial basis. Today ADIA invests in all the international markets — equities, fixed income and treasury, infrastructure, real estate, private equity, and alternatives (hedge funds and commodity trading advisers — CTAs). ADIA also invests in development projects including malls. Many of ADIA's investments have decreased substantially since investments were made at market peaks in 2007 and 2008. The $7 billion investment in Citigroup has lost approximately 90% of its value as of 26 November 2009, 2 years after it acquired a sizable stake in the bank. Its investments in global real-estate at the market top in 2008 have also decreased substantially in value. Though it talks of its long-term success in generating returns, the fact that it has moved closer to the index and manages most of its funds through external third-party fund managers shows that its tolerance for risk-taking has greatly diminished over the years. However, ADIA's ratio of third-party fund managers is being actively managed. In 2006, between 70% and 80% of the organization's assets were managed outside with an aim to bring that down to between 60% and 70%. In the year 2005, Abu Dhabi Investment Company purchased 51 percent of shares of Massar (Company) from Abu Dhabi Power Corporation, a subsidiary of Abu Dhabi Water & Electricity Authority. On 27 May 2013, ADIA published its 2012 Review, with an overview of its activities during the past year as well as an explanation of its approach to investing – strategy, governance, and risk management. In June 2018, ADIA acquired 21.4% of Pension Insurance Corporation Group from
J.C. Flowers. In the same year, the fund increased its stake in
Axis Bank to 1.19%. In February 2019, ADIA and Triton acquired 100% of IFCO, each receiving an equal 50% co-controlling stake. In 2025, ADIA agreed to sell their stake to
Stonepeak. In 2019, ADIA announced that it would be investing over $1 billion into
Saudi Aramco's initial public offering. In 2020 the AIDA disclosed a share of $615 million in
Cheniere Energry. In June 2020, ADIA acquired a minority stake in India’s
Jio Platforms, a provider of digital services and mobile networks, for $752.1 million. In October of the same year, ADIA acquired a 1.2% stake in
Reliance Retail, an subsidiary of
Reliance Industries, for $751.13 million, followed by buying another $598 million stake in October 2023. In July 2021 made a $500 million contribution to EdgePoint Infrastructure, a telecom tower platform in Southeast Asia. In October of the same year, ADIA took part in a $400 million pre-IPO funding round for the
GoTo Group, an Indonesian firm operating across e-commerce, mobility, and digital payments. In April 2022, ADIA purchased a 10% interest in HDFC Capital Advisors in India from
HDFC Ltd for $24.06 million. In 2022, ADIA contributed $2 billion to a data-centre development programme in Asia-Pacific, in a partnership with SC Capital. In March 2023, the fund put $500 million into Indian eyewear e-commerce firm
Lenskart. In June 2024, together with
Advent International, ADIA announced the purchase of a minority stake in United States-based
Fisher Investments for $3 billion, which they finished in January 2025. In 2024, AIDA invested $1.7 billion into
Fisher Investments together with Lunate, $2.8 billion into Trans-Java Toll Roads with
INA and
APG, as well as $5.6 billion into NetCo SRL together with
CDP Eq and
CPP. In 2024, ADIA acquired a 40% stake in
DigitalBridge, a U.S.-based data-centre platform and subsidiary of Landmark Dividend. Later in the year, ADIA bought a minority stake in Qlik Technologies, a U.S. data integration and analytics company, and participated in the recapitalisation of
IFS, a Swedish software firm. ADIA began using a division of data scientists made up of 125 people to assist with in-house investing in November 2024 providing a strategic shift towards private equity and private credits. In 2025, ADIA was selling mature assets and reallocating funds into growth sectors in an active portfolio re-balancing strategy. In January 2025, ADIA became a shareholder in Innocap Investment Management, with an agreement permitting it to increase its stake to 10%. In April 2025, ADIA invested ₹26.24 billion in
IDFC FIRST Bank in India for a 5.1% stake. Tawreed Investments is a subsidiary of ADIA that has investments in several Australian infrastructure projects including
Queensland Motorways,
TransGrid, and
WestConnex. ADIA invested $200 million in to Meril, a medical devices firm, in July 2025 acquiring a 3% stake in the company. In February 2026, ADIA sold its 50% stake in a
Sydney office precinct to
Charter Hall, an Australian fund manager, for $351 million. ==Board of directors==