OpenAI Reaches Historic $500 Billion Valuation, Becoming World’s Most Valuable Startup

OpenAI has achieved a groundbreaking $500 billion valuation following a secondary share sale, making it the world’s most valuable private company. The AI company behind ChatGPT surpassed SpaceX and ByteDance in this landmark transaction completed October 2, 2025.

The deal allowed employees to sell $6.6 billion worth of shares, reflecting unprecedented investor confidence in AI technology.

This represents a seismic shift in the artificial intelligence landscape and validates OpenAI’s market position.

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Ben is a tech and business analyst who explains how innovation shapes markets and strategy. He worked in corporate strategy for leading Silicon Valley firms, developing a deep understanding of how technology transforms business models. His writing combines analytical depth with practical perspective, making him a trusted voice for readers navigating the business of technology.

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