Oct 28 (TechGenez) — Microsoft Corp and OpenAI have finalized a new agreement valuing the AI startup at $500 billion, restructuring the company to eliminate restrictions on future capital raises and allowing Microsoft to maintain a 27% stake in the newly formed OpenAI Group PBC, the companies announced on Tuesday.
The deal, which removes constraints that limited OpenAI’s ability to seek outside funding, comes as Microsoft surpasses $4 trillion in market value once again, underscoring the deepening ties between the software giant and the creator of ChatGPT.
The partnership, first forged in 2019 with Microsoft’s $1 billion investment, has evolved amid rapid AI advancements, with Microsoft investing over $13 billion to date. The restructuring positions OpenAI for accelerated growth while preserving Microsoft’s strategic influence.
Deal Terms
Under the agreement, OpenAI will transition from its for-profit capped-profit structure to OpenAI Group PBC, a public benefit corporation that balances mission-driven AI development with commercial viability.
Microsoft will hold a 27% stake in the new entity, down from its previous non-voting position, granting it limited governance rights while ensuring alignment on AI safety and deployment.
The deal lifts previous limits on OpenAI’s fundraising, capping profits for early investors at 100 times their contribution. This opens the door for new capital infusions, potentially valuing OpenAI at $500 billion in the next round.
OpenAI CEO Sam Altman hailed the move: “This structure allows us to continue our mission of safe AGI while attracting the capital needed to scale responsibly.”
Microsoft CEO Satya Nadella added: “Our partnership with OpenAI remains foundational to our AI strategy, and this evolution ensures mutual success.”
Company Response
OpenAI, which has raised over $20 billion since 2019, will use the flexibility to fund massive compute infrastructure, including data centers powered by Microsoft’s Azure cloud.
The restructuring addresses investor concerns over the original capped-profit model, which prioritized the non-profit OpenAI Inc.’s mission to benefit humanity.
Microsoft, which integrates OpenAI’s models into products like Bing and Office, will continue providing exclusive cloud services, with commitments extending through 2030.
Broader Context
The deal arrives as AI investments surge, with global funding hitting $100 billion in 2025, per Crunchbase. OpenAI’s valuation leap from $157 billion in October 2024 reflects the AI boom, though it trails Anthropic’s $18.4 billion post-raise.
Microsoft’s market cap crossed $4 trillion again on Tuesday, up 2% to $4.02 trillion, driven by Azure’s 30% growth and AI integrations.
The partnership has faced regulatory scrutiny, including a 2024 FTC probe into antitrust risks, but the new structure aims to mitigate concerns by allowing broader investor participation.
OpenAI’s shift to a PBC model, similar to Anthropic’s, emphasizes public benefit alongside profits, aligning with calls for responsible AI.
Market Reaction
Microsoft shares jumped 1.8% to $418.50 in New York trading on Tuesday, pushing its market cap above $4 trillion for the first time since July.
The Nasdaq Composite rose 0.7%, with AI peers like Nvidia gaining 1.2%. OpenAI, privately held, saw secondary shares trade at a $500 billion implied valuation on Forge Global.
Analysts at Wedbush Securities called the deal “a masterstroke,” noting it unlocks OpenAI’s growth while securing Microsoft’s AI moat.
Challenges
The restructuring must navigate U.S. antitrust reviews, with the FTC examining Microsoft’s influence over OpenAI.
OpenAI faces talent wars and ethical debates over AGI safety, with critics warning of risks like job displacement and bias.
The capped-profit unwind could dilute early investors, though it enables scaling amid $1 billion monthly compute costs.
Quotes
Altman said: “This new structure empowers us to pursue AGI with the resources needed, while staying true to our mission.”
Nadella added: “Our deepened partnership with OpenAI will accelerate AI for everyone, responsibly.”
Broader Industry Trends
- AI valuations are soaring: OpenAI’s jump mirrors Anthropic’s $18.4 billion and xAI’s $24 billion.
- Microsoft’s Azure AI revenue hit $10 billion in Q3 2025, up 150%, per earnings.
- Global AI funding reached $100 billion in 2025, per Crunchbase, with infrastructure deals dominating.
- The EU AI Act and U.S. executive orders push for safety, influencing partnership structures.
Outlook
The deal is expected to close by year-end, pending approvals. OpenAI plans a $10 billion raise in Q1 2026 at the $500 billion valuation.
Microsoft forecasts AI contributing 15% to revenue by 2027, with OpenAI key to that growth. Analysts at Morgan Stanley predict the partnership could add $50 billion to Microsoft’s market cap by 2028.
As AI reshapes industries, Microsoft and OpenAI’s alliance sets the pace for the trillion-dollar race to AGI.
