Gulf Development

The companies on the third annual ranking brought in combined 2025 revenues of $1.88 trillion and profits of $150 billion.

<p>Thailand’s largest private power producer has reinvented itself as an energy-and-telecoms conglomerate. New power plants are lifting energy revenues, though the group’s LNG supply chain faces headwinds from the closure of the Strait of Hormuz. 
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Fortune Southeast Asia 500

Our ranking reflects the dominance of energy companies, the enduring profitability of Southeast Asia’s banks, shifting global supply chains, the steady rebound in tourism, and the rapid ascent of AI-driven businesses in the region.

Our new ranking reflects the rise and fall of energy markets, multinational supply chains, and tourism in the region.

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Gulf Development

Gulf Development in Fortune Rankings