Tokenized representations of Anthropic and OpenAI shares on Solana crashed on May 12, 2026, after both companies published formal statements declaring that any sale or transfer of their stock that was not board-approved is legally void. Anthropic's token fell as much as 38 percent, while OpenAI's dropped approximately 46 percent. The crash left non-US retail investors, the precise audience these products were built to serve, with the sharpest legal and financial exposure. Anthropic's token fell from roughly $1,400 to approximately $879, while OpenAI's equivalent dropped from around $1,400 to about $1,080. Post-crash market caps sat at roughly $8.3 million for Anthropic and $2.2 million for OpenAI, according to data cited by The Block.

What Happened

Anthropic updated its investor-warning page on May 12 with explicit language: "Any sale or transfer of Anthropic stock, or any interest in Anthropic stock, that has not been approved by our Board of Directors is void and will not be recognized on our books and records." The company added that any third party claiming to sell Anthropic shares to the general public "is likely either engaged in fraud or offering an investment that may have no value." OpenAI followed with nearly identical language, warning in full: "The sale will not be recognized and carry no economic value to you."

Anthropic named eight platforms it considers unauthorized, including established secondary market operators Forge Global and Hiive, as well as Open Door Partners, Unicorns Exchange, Pachamama, Lionheart Ventures, Sydecar, and Upmarket. The warnings cover direct sales, special purpose vehicles (SPVs), tokenized interests, and forward contracts. This covers essentially every mechanism that retail-facing blockchain platforms use to package private company equity for outside buyers.

The May 12 statements did not emerge in isolation. OpenAI had already published a substantially similar disavowal of unauthorized share transfers in November 2025, months before this event, establishing a continuing and coordinated pattern of private-company pushback against unauthorized secondary markets rather than a reactive or spontaneous response.

The Platform at the Center

PreStocks, a Solana-based platform that rebranded and relaunched in August 2025, creates tokens that represent claims on SPVs, which in turn claim to hold real equity in private companies like Anthropic and OpenAI. The platform requires no investor accreditation, accepts minimum purchases of around $100 USDT, and allows 24/7 trading on the Jupiter decentralized exchange. Total assets on the platform at the time of the crash were approximately $23 million. On April 12, 2026, the platform recorded a single-day trading volume of $29 million, with OpenAI tokens accounting for nearly 70 percent of activity.

There is a structural legal problem with this model. Under Delaware corporate law, where most major US tech companies are incorporated, equity ownership is recorded in official corporate books and requires board approval to transfer. What PreStocks tokens actually represent is a contractual claim on an SPV, not a recognized entry in Anthropic's or OpenAI's shareholder records. Crypto attorney Gabriel Shapiro summarized the situation plainly: "Anthropic appears to be saying it will treat all these transfers as void."

The risks of the SPV structure are not hypothetical. Ripple investors who held exposure through Linqto, a platform that subsequently filed for bankruptcy, lost their holdings entirely when the intermediary collapsed, providing the most concrete available illustration of what happens when an SPV layer fails or is legally invalidated.

Who Gets Left Behind

PreStocks operates under Regulation S, a US securities exemption that restricts sales to non-US investors only. That legal structure means the investors most exposed to this crash are concentrated in regions like India, Nigeria, Kenya, and Pakistan. India ranked first globally in crypto adoption in Chainalysis's 2024 index, with an estimated 119 million crypto users. Nigeria ranked second. For retail investors in these markets, products like PreStocks represented rare access to AI sector upside that is normally available only to Silicon Valley insiders or institutional capital. Entry at $100 made it reachable. The pitch was straightforward: the same companies powering the AI boom, accessible from Nairobi or Mumbai.

That pitch now has a legal hole in it. Unlike US accredited investors, retail holders in Africa or South Asia have no recognized standing in Anthropic's or OpenAI's corporate records and no clear regulatory pathway to challenge the invalidation. Kenya's Virtual Assets Service Providers Act, passed in November 2025, requires crypto platforms to register with either the Central Bank of Kenya (for stablecoin operators) or the Capital Markets Authority (for exchange operators), but PreStocks operates offshore and outside that framework entirely. In India, where the Securities and Exchange Board of India is still developing its stance on tokenized securities and an existing crypto tax framework already creates compliance complexity, retail holders of these instruments face an equally unclear legal position.

John Montague, a crypto lawyer, warned that "private companies may initiate lawsuits alleging that this violates their governance documents, shareholders' agreements, investor rights agreements, or bylaws." Moonrock Capital founder Simon Dedic described the potential fallout as "an FTX-like bloodbath." Entrepreneur and investor Brian Norgard offered an equally stark assessment: "If Anthropic starts invalidating layered SPVs, private markets are in for a reckoning."

What Comes Next

The warnings arrive at a notable moment for Anthropic. Reuters reported the company hired Wilson Sonsini for potential 2026 IPO preparation, though no timeline has been confirmed, and its annualized revenue reportedly grew from $9 billion at the end of 2025 to roughly $30 billion by April 2026, largely driven by Claude Code. Amazon has committed to invest up to $25 billion. Before the crash, tokenized Anthropic instruments on PreStocks implied a company valuation of between $1.25 trillion and $1.5 trillion, more than three times to nearly four times the $380 billion Series G valuation set during its last funding round.

The episode carries implications beyond these two companies. Tokenized representations of SpaceX, Stripe, and Databricks trade on similar platforms. Any of those companies can issue an equivalent warning at any time, with no mechanism for token holders to contest it. The market for tokenized pre-IPO products is nonetheless expanding: Bitget has launched its IPO Prime product on Solana through regulated partner Republic, beginning with SpaceX (preSPAX) and then OpenAI (preOPAI), suggesting that a regulated-partner structure may represent a more durable alternative model. It is also worth noting that authorized secondary transactions do exist and function. OpenAI ran a board-approved tender offer of $6.6 billion in employee stock sales in October 2025, a reminder that the legal line separates authorized transfer mechanisms from the platforms now being voided, not all secondary sales from none. For the broader real-world asset tokenization narrative, and for the emerging-market retail investors it claimed to benefit most, the structural risk this week made visible is precisely the absence of that authorization.