Mukesh Ambani built his wealth by transforming Reliance Industries from an Indian textiles and petrochemicals company into a sprawling conglomerate spanning oil refining, telecommunications, retail, and renewable energy. His net worth, consistently among the highest in Asia, is tied almost entirely to his family’s controlling stake in Reliance Industries Limited (RIL), a publicly traded company on the Indian stock exchanges. The story of how he got there involves inheriting a strong foundation, making massive industrial bets, and pivoting into digital technology at exactly the right moment.
His Father Built the Foundation
Mukesh Ambani did not start from zero. His father, Dhirubhai Ambani, founded Reliance Commercial Corporation in 1966 as a small trading firm and grew it into one of India’s largest private-sector companies by the 1980s. Dhirubhai was a legendary figure in Indian business, known for aggressive expansion and for taking Reliance public in 1977, drawing millions of small Indian investors into the stock market for the first time.
Mukesh joined the family business in 1981 after leaving Stanford’s MBA program. From the start, he focused on the industrial side, helping diversify Reliance into petrochemicals, petroleum refining, polyester fibers, infrastructure, and oil and gas production. His engineering mindset shaped the company’s direction toward large-scale manufacturing rather than trading.
The Jamnagar Refinery Changed Everything
The single project that cemented Mukesh Ambani’s reputation was the construction of a massive petroleum refinery at Jamnagar in Gujarat, which began operations in 1999. It was the world’s largest grassroots (built from scratch) refinery at the time, and subsequent expansions made the Jamnagar complex the largest refining hub on the planet, capable of processing well over a million barrels of crude oil per day.
This was not a small bet. Building a world-scale refinery required billions of dollars in capital and years of construction. But the payoff was enormous: refining margins gave Reliance a steady, high-volume cash flow engine. Oil refining and petrochemicals became the financial backbone that funded everything Ambani did afterward. For years, these “old economy” operations generated the bulk of Reliance’s profits.
The 2005 Split With His Brother
When Dhirubhai Ambani died in 2002 without a public will, a bitter succession fight erupted between Mukesh and his younger brother Anil. Their mother brokered a settlement in 2005 that divided the Reliance empire in two.
Mukesh kept Reliance Industries, the parent company, which controlled chemicals, textiles, and oil and gas production. Anil received a newly created services company encompassing electric power, financial services, and telecommunications. At the time, many observers thought Anil got the more exciting, growth-oriented half. The “old economy” assets Mukesh retained seemed unglamorous by comparison.
That assessment turned out to be spectacularly wrong. Mukesh used the refining and petrochemical cash flows to fund his next move, while Anil’s businesses struggled with debt and regulatory challenges over the following decade.
Jio Disrupted Indian Telecom
The decision that multiplied Ambani’s wealth most dramatically was launching Reliance Jio, a 4G telecommunications network, in late 2016. Ambani invested roughly $35 billion building out a nationwide network before collecting a single rupee in revenue, then offered free voice calls and rock-bottom data prices that upended the Indian telecom industry. Established carriers were forced to merge or exit the market entirely.
The strategy was simple but required enormous patience and capital: attract hundreds of millions of subscribers with cheap data, then monetize them through a growing ecosystem of digital services. It worked. By 2020, Jio had more than 376 million subscribers and had become one of the world’s largest mobile carriers by user count.
In 2020, Ambani raised capital by selling minority stakes in Jio Platforms, the digital subsidiary housing the telecom business and related apps. Facebook (now Meta) led with a $5.7 billion investment for a 9.99% stake. Vista Equity Partners, General Atlantic, Silver Lake, and KKR followed with investments of roughly $750 million to $1.5 billion each. These deals collectively valued Jio Platforms at approximately $65 billion and helped Reliance eliminate $21.4 billion in net debt, strengthening the parent company’s balance sheet dramatically.
For Ambani personally, the Jio success story did two things: it added a high-growth technology business to Reliance’s portfolio, which pushed the stock price higher, and it attracted global institutional capital that validated the company’s value on the world stage.
Retail and Renewable Energy
Ambani applied a similar playbook to retail. Reliance Retail grew into India’s largest retail chain, operating thousands of stores across groceries, electronics, fashion, and pharmacy segments. Like Jio, the retail arm used scale and aggressive pricing to capture market share, then attracted outside investment from global private equity firms.
More recently, Ambani has committed roughly $10 billion to building a clean energy portfolio, with a stated goal of reaching net-zero carbon emissions by 2035. Reliance is constructing integrated solar and battery manufacturing facilities in Gujarat spanning approximately 44 million square feet. Analysts at firms like Jefferies have valued just the solar vertical at around $15 billion, while Emkay Global values the broader new energy segment at about 1.5 trillion rupees (roughly $17 billion). These facilities are expected to become operational within the next one to two years.
Where His Wealth Actually Sits
Ambani’s fortune is not cash in a bank account. It is almost entirely the value of his family’s shareholding in Reliance Industries. The Ambani family, through a promoter group of holding entities, controls a significant stake in RIL. When Reliance’s stock price rises, Ambani’s net worth rises with it. When it falls, so does his ranking on global wealth lists.
This concentration is important context. Ambani got rich not primarily through salaries, dividends, or selling shares, but through building businesses that increased the market capitalization of a single company. Reliance Industries grew from a market cap of a few billion dollars in the early 2000s to one of the most valuable companies in Asia, worth several hundred billion dollars. That appreciation, applied to the family’s ownership stake, is the core of how Mukesh Ambani became one of the wealthiest people in the world.
The Pattern Behind the Wealth
A few recurring themes run through Ambani’s career. First, he consistently made capital-intensive bets that competitors were unwilling or unable to match. The Jamnagar refinery, the Jio network buildout, and the renewable energy factories all required billions of dollars upfront with returns that took years to materialize. Reliance’s existing cash flows from refining gave him the financial runway to absorb those costs.
Second, he focused on scale as a competitive weapon. In refining, telecom, and retail, the strategy was to build at such massive scale that unit costs dropped below what competitors could match, forcing consolidation in each industry.
Third, he inherited a platform. Dhirubhai Ambani built Reliance into a major company and took it public, giving Mukesh both the capital base and the corporate infrastructure to execute his own vision. Starting with a publicly traded company that already had access to Indian and international capital markets was an enormous advantage that separates his path from a founder starting from scratch.