Anthropic announced that all unauthorized stock trades are void, emphasizing that mechanisms like tokenized securities could potentially become worthless.
Written by: ChandlerZ, Foresight News
On May 11, Anthropic updated the investor warning document on their official support page (originally published on February 11, 2026), significantly strengthening their stance against unauthorized stock trading.
The announcement states that both Anthropic's preferred and common stocks are subject to transfer restrictions in the company's bylaws, and any stock sales or transfers without board approval are considered void; the company will not recognize such trades in the equity register. This means that unauthorized buyers will not be regarded as shareholders by Anthropic and will not enjoy any shareholder rights.
Anthropic has systematically blocked common workarounds in the market.
SPVs are explicitly singled out as prohibited: no SPV is allowed to hold Anthropic stock, and any transfer of shares to an SPV is invalid.
Indirect investment funds: Anthropic noted that some funds are enticing clients with the pitch, 'You can't invest directly in Anthropic, but invest in us, and we'll help you get in.' These funds are 'most likely relying on mechanisms that attempt to circumvent transfer restrictions.'
Invalid transaction forms include direct sales, beneficial interests, forward contracts, tokenized securities, and all types.
The announcement also listed unauthorized intermediaries: Open Door Partners, Unicorns Exchange, Pachamama, Lionheart Ventures, Sydecar, Upmarket, and new trades on Forge Global and Hiive.
Anthropic stated: 'If someone offers you a way to participate in investing in Anthropic, even indirectly, please assume it is invalid.'
'Void' or bluffing?
Crypto law attorney Gabriel Shapiro posted on X that he was surprised this statement didn't garner more attention, and he believes it could be a 'potential bombshell.'
Shapiro noted that there is active secondary market trading for Anthropic stock on 'at least well-known' platforms like Forge. Anthropic is now directly naming these platforms and claiming that these trades are all illegal. He believes that some of them might indeed be fraudulent, meaning the sellers do not actually own the stocks they claim, but it’s more likely that many transactions are attempts at legitimate equity transfers.
The lawyer posed several sharp questions, including whether the original seller had the opportunity to 'double-dip'? That is, to simultaneously retain the cash from the sale and the shares, because if the transfer is invalid, the shares were never legally transferred. Would all sellers in the transaction chain and downstream buyers be wiped out at once? Is Anthropic bluffing or is this for real?
Shapiro specifically pointed out the legal distinction between 'void' and 'voidable.' If a transaction is merely 'voidable,' downstream buyers can still use various equitable defenses to maintain their rights. But if the transaction is deemed 'void ab initio' (invalid from the outset), in some jurisdictions, the buyer's equitable defenses will be completely blocked. This involves highly specialized areas of corporate law, depending on the wording of the transfer restriction clause and how legal consequences for violating restrictions are defined.
The secondary market behind the trillion-dollar valuation.
Anthropic's move at this point isn't a coincidence. With the company's valuation skyrocketing over the past year, the secondary market trading around its stock has also exploded.
In September 2025, Anthropic completed a $13 billion Series F funding, valuing the company at $183 billion. In February 2026, the company completed a $30 billion Series G funding, raising its valuation to $380 billion. According to a TechCrunch report on April 30, Anthropic is negotiating a new financing round of about $50 billion, targeting a valuation of $850 to $900 billion, which, if successful, would surpass OpenAI as the highest valued private AI company in the world. Bloomberg reported that Anthropic could potentially go public in October 2026.
While the valuation in the primary market soars, pricing in the secondary market is even more aggressive. Anthropic's implied valuation on Forge Global has already reached around $1 trillion, significantly exceeding its latest primary funding round of $380 billion. More strikingly, on April 27, the synthetic Prestocks token on the decentralized exchange Jupiter on the Solana chain pushed Anthropic's on-chain implied valuation to $1 trillion, making tokenized securities a new channel for retail investors to speculate on equity in AI unicorn companies.
The huge price disparity between primary and secondary markets has given rise to a plethora of gray-area intermediaries. The fraud warning signals listed in Anthropic's announcement include stock sales initiated through email, social media, or instant messaging, claims of exclusive or limited-time purchase opportunities, demands for payment via cryptocurrency or wire transfer, pressure for quick investment decisions, claims of bypassing company restrictions through special structures, and inability to provide board approval documents.
FOMO's on-chain Pre-IPO.
Anthropic's statement targets not only traditional secondary market platforms like Forge and Hiive, but also the rapidly expanding on-chain Pre-IPO tokenization space in the crypto market over the past year.
Take PreStocks for example, it's an SPL token traded on Solana via Jupiter, pegged 1:1 to the exposure of private company shares held in SPVs. Anyone can trade 24/7 without needing accredited investor certification.
The scale of the PreStocks platform is now hard to ignore. According to its product page, the platform manages assets totaling $23.7 million, with a cumulative trading volume of $1.1 billion, 18,350 holders, and 3.51 million total transactions. The platform has launched tokenized products for eight private companies including SpaceX, Anthropic, OpenAI, Anduril, Neuralink, Kalshi, Polymarket, and xAI, covering multiple sectors such as AI, aerospace, brain-computer interfaces, and prediction markets, with a combined implied total valuation of over $5 trillion.
On-chain traders are pricing major unicorns extremely aggressively, with SpaceX's implied valuation at $1.69 trillion leading the pack, followed closely by Anthropic at $1.57 trillion (12.7% increase over 30 days), and OpenAI at $1.26 trillion (20.1% increase over 30 days). The on-chain implied valuations of these three AI/aerospace giants far exceed the pricing of their latest primary financing rounds.
For instance, Anthropic's implied valuation on PreStocks first hit $1 trillion on April 27, and further climbed to $1.2 trillion in early May, marking a 20% increase within a week. Its on-chain valuation is more than four times the latest Series G funding round ($380 billion).
Anthropic is not the first AI company to issue a warning on tokenized stocks. In July 2025, OpenAI publicly stated that any transfer of OpenAI equity would require company approval, clearly indicating that the circulating OpenAI tokens on-chain are not legitimate equity. However, shortly after, Robinhood's venture fund, Robinhood Ventures Fund I (RVI), announced on April 17, 2026, that it invested $75 million in OpenAI, acquiring a small stake.
Retail investors' claim difficulties.
If Anthropic's transfer restrictions indeed render the trades invalid from the get-go, the original seller may never have legally lost ownership of the shares. This means the seller has the chance to keep both the cash from the sale and the shares themselves, while the buyer's claim turns into a 'legitimate holder of shares but took your money' counterparty, creating a very ambiguous legal relationship. In scenarios involving multi-layer SPV transfers or on-chain synthetic tokens, the legal status of each link in the transaction chain could potentially be negated.
Investors who have already purchased Anthropic stock on the secondary market may face the reality that the company might not recognize their equity, exit channels may be blocked, and they can only claim against upstream sellers or intermediaries. Whether Anthropic will take specific legal action against existing secondary market trades, whether other AI unicorns like OpenAI and xAI will follow similar policies, and whether the SEC will initiate enforcement actions against unauthorized tokenized securities will collectively determine if the on-chain Pre-IPO space can survive within a compliant framework.