OpenAI Surges to $500 Billion, Passes SpaceX as Top Private Firm

This development puts it ahead of SpaceX, which has been estimated at around $400 billion, according to a report by Bloomberg.

The share sale was not part of a new fundraising round. Instead, it gave current and former OpenAI employees, who had held stock for more than two years, the option to sell their shares.

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The buyers included investment firms such as Thrive Capital, Dragoneer, SoftBank Group, Abu Dhabi’s MGX, and asset manager T. Rowe Price.

This is the second time within a year that OpenAI has offered employees a chance to sell shares. A similar offer took place in November 2024 when SoftBank led a $1.5 billion purchase. In January, reports suggested SoftBank was also considering a much larger investment, possibly up to $25 billion.

Investor interest in OpenAI remains strong, despite the public attention surrounding its upcoming AI model, GPT-5. In September, OpenAI and Nvidia announced a long-term infrastructure plan.

Under this partnership, OpenAI will use at least 10 gigawatts of Nvidia technology, and Nvidia will provide up to $100 billion over time, tied to the deployment of each gigawatt.

On September 19, Flora Growth initiated a $401 million treasury plan to support the growth of Zero Gravity. What was the goal of the plan? Read the full story.