Microsoft Holds 28% Stake as OpenAI’s Governance Faces Growing Scrutiny
As OpenAI cements its place as one of the most valuable artificial intelligence companies in the world, questions around ownership and control have become central to the company’s future. Based on a $500 billion valuation, recent estimates provide a clearer picture of who holds the biggest stakes in OpenAI.

Microsoft remains the single largest shareholder, with 28% of the company, valued at approximately $140 billion. The close partnership between OpenAI and Microsoft has grown since their multibillion-dollar collaborations, cementing the tech giant’s influence over the AI firm’s trajectory.

OpenAI’s nonprofit parent entity follows closely with 27% ($135 billion), ensuring that the company’s original mission of prioritizing safety and long-term public benefit still retains substantial weight. Meanwhile, OpenAI employees collectively own 25% ($125 billion), reflecting the company’s strategy of rewarding and retaining top AI talent.

On the investor side, the most significant group is participants in the 2025 fundraise, who hold 13% ($65 billion). Smaller but still notable are investors from the 2024 fundraise with 4% ($20 billion), along with IO shareholders at 2% ($10 billion) and OpenAI’s earliest backers at 1% ($5 billion).

This ownership structure highlights a balance between big-tech partnership, nonprofit oversight, employee ownership, and venture capital backing. As OpenAI scales further in 2025 and beyond, the mix of stakeholders will play a pivotal role in shaping not only the company’s innovations but also the governance of AI at a global level.

Microsoft Holds 28% Stake as OpenAI’s Governance Faces Growing Scrutiny
Stakeholder Share
Microsoft 28% ($140B)
OpenAI’s nonprofit 27% ($135B)
OpenAI employees 25% ($125B)
Investors (2025 fundraise) 13% ($65B)
Investors (2024 fundraise) 4% ($20B)
IO shareholders 2% ($10B)
OpenAI’s first investors 1% ($5B)

Notes: This post was edited/created using GenAI tools.

Read next: FCC Considers Cutting Satellites Out of Environmental Oversight[2]

[1]

References

  1. ^ $500 billion valuation (www.reuters.com)
  2. ^ FCC Considers Cutting Satellites Out of Environmental Oversight (www.digitalinformationworld.com)

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