Elon Musk’s lawsuit against OpenAI heads to closing arguments Thursday, accusing the AI firm of violating its original nonprofit charter. Musk claims the 2025 removal of a profit cap let OpenAI shift assets amassed under tax‑exempt status into private hands. Attorneys general in Delaware and California allegedly approved the transfer without transparent valuation, raising questions about public oversight. The filing also seeks monetary damages.

Founded in 2015 as a charitable research lab, OpenAI created a for‑profit subsidiary in 2019 to attract venture capital, notably from Microsoft. The arrangement capped investor returns, directing excess earnings back to the nonprofit. Once the cap vanished, billions of dollars in charitable assets could be claimed by shareholders, marking what officials call the largest private appropriation of public‑benefit funds in U.S. history.

The case spotlights how regulatory leniency can reshape tech financing and affect shareholder value. If courts uphold Musk’s claim, OpenAI may be forced to unwind its for‑profit structure, potentially destabilizing its $13 billion market valuation and jeopardizing Microsoft’s stake. Investors now watch the proceedings for clues on liability exposure and future governance standards.