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A coalition of U.S. state attorneys general has opened a formal investigation into OpenAI. New York’s attorney general issued a subpoena to the company on Friday, June 13. Multiple states are coordinating the probe. The full coalition size and the scope of the investigation have not been disclosed publicly. OpenAI confirmed receiving the subpoena.

The Legal Accumulation

The AG investigation adds to a layered set of legal exposures OpenAI carries into its IPO window. Florida filed the first state lawsuit against OpenAI and Sam Altman in May, connecting chat logs to a campus shooting. Six state AGs separately asked the SEC to investigate Altman’s personal investment activity around OpenAI’s conversion from nonprofit to public benefit corporation. The new multistate investigation appears broader in scope — directed at the company itself rather than Altman’s investment positions.

The nonprofit-to-PBC conversion remains OpenAI’s most significant unresolved legal exposure at the state level. California and Delaware law governed the conversion and both states’ attorneys general have oversight authority over charitable assets. Whether the new coalition investigation connects to that prior scrutiny, extends the Florida chatbot harm theory, or covers different ground is not yet established.

The prior six-state SEC referral was advisory. A subpoena issued by the New York AG carries mandatory document production obligations and signals a formal investigative proceeding rather than a public policy letter.

IPO Exposure

OpenAI filed a confidential S-1 with the SEC, targeting one of the largest technology IPOs on record. The $852 billion valuation from its most recent fundraise sets the floor for public market pricing. A formal legal proceeding involving a subpoena from the state where much of OpenAI’s commercial infrastructure is concentrated is a mandatory S-1 disclosure.

The company’s underwriters will be assessing whether the probe’s scope, potential duration, or likely findings could affect the listing timeline or pricing. New York AG investigations typically seek broad documentation production and carry significant leverage in structuring settlements. The investigation is not a charge or a finding, but formal proceedings of this type take place on a timeline measured in months to years — not weeks.

OpenAI has not been charged with anything. An investigation is not a finding. But the question for IPO counsel is whether the subpoena constitutes a material legal proceeding that must be disclosed prominently in the S-1, and whether it will prompt investors to discount the offering.

Context: A Pattern With Precedent

The multistate AG coordination model is the same mechanism used in technology investigations against Google, Meta, Amazon, and Apple over the past decade. States that individually lack the resources to sustain long investigations pool expertise, share discovery, and achieve collective leverage that individual state actions cannot. The New York AG has historically led these coalitions and used the discovery to shape federal enforcement as well.

OpenAI enters this investigation after a year that included: a $122 billion fundraise; an $852 billion valuation; missed user growth targets; a competitive loss to Anthropic in enterprise coding; and the revelation that its five released models had chain-of-thought accidentally graded during RL training. The regulatory environment it faces going public is materially more complex than the environment it operated in as a private company.

The investigation’s first disclosure deadline is the S-1. That will be the first public look at what OpenAI’s lawyers believe is under review.