OpenAI has completed a deal to help employees sell shares in the company at a $500 billion valuation, propelling the ChatGPT owner past Elon Musk’s SpaceX to become the world’s largest startup.
Current and former OpenAI employees sold about $6.6 billion of stock to investors including Thrive Capital, SoftBank Group Corp., Dragoneer Investment Group, Abu Dhabi’s MGX and T. Rowe Price, a person familiar with the transaction said. That boosted the US company’s price tag well past its previous $300 billion level during a SoftBank-led financing round earlier this year.
That rapid rise underscores the investment frenzy surrounding the leaders of a technology with the potential to transform industries and economies. Sam Altman’s OpenAI is one of several companies including Nvidia Corp. now leading a global push to build data centers and develop artificial intelligence services, an undertaking that’s expected to cost trillions of dollars. Though it has yet to turn a profit, the US startup is helping fuel that infrastructure boom by inking mega-sized deals with the likes of Oracle Corp. and SK Hynix Inc.
Representatives for Thrive Capital, Dragoneer, MGX and T. Rowe Price didn’t immediately respond to requests for comment. OpenAI and SoftBank spokespeople declined to comment.
The deal vaults OpenAI past SpaceX’s $400 billion valuation. That milestone coincides with a pivotal time for Altman’s company, which is in negotiations with Microsoft Corp. to convert into a more traditional for-profit company. OpenAI was founded in 2015 as a nonprofit dedicated to advancing digital intelligence “in the way that is most likely to benefit humanity as a whole.” Planned changes will give the existing OpenAI nonprofit entity control over a new public benefit corporation.
Both Altman and Musk, who were OpenAI co-founders, have spoken about the potential existential risk to humans posed by AI. Yet they’ve since fallen out: Musk has sued to try and stop the overhaul, accusing OpenAI of forsaking promises to him when he helped to create the nonprofit. He claims it abandoned its founding purpose when it accepted billions of dollars in backing from Microsoft starting in 2019, the year after he left OpenAI’s board.
When it comes to the business itself, OpenAI faces an increasingly competitive market for AI talent as big tech firms jockey for the resources they need. Meta Platforms Inc., for one, has recruited researchers aggressively from OpenAI and other top labs for its new “superintelligence” team, offering pay packages in the nine-figure range.
A secondary sale could help OpenAI incentivize staff to stay at the company and turn down those lavish compensation offers.
Major US startups often negotiate share sales for their employees as a way to reward and retain staff, and also attract external investors. OpenAI is looking to leverage investor demand to provide employees with liquidity that reflects the company’s growth.
The total amount of eligible units sold in the secondary fell short of the $10 billion-plus worth of stock that the company allowed for sale, the person familiar said, speaking on condition of anonymity as the information is private. That could mean current and former employees are demonstrating confidence in the long-term viability of the business, the person added.
In the long run, OpenAI faces mounting competitive pressure from rivals such as Google and Anthropic, which is also raising capital at a rapid clip. In response, OpenAI has embarked on a spate of recent technology product launches.
Those include a pair of open and freely available artificial intelligence models that can mimic the human process of reasoning, months after China’s DeepSeek gained global attention with its own open software. OpenAI released its most powerful GPT-5 model in August, aimed at shoring up its lead in an increasingly crowded sphere.
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