Anthropic warns investors to avoid unauthorized secondary market sellers

The AI company named eight firms it says have no authority to sell its shares, calling any such transactions void.

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Add us on Google by Editorial Team May. 15, 2026

Anthropic, the AI company behind the Claude chatbot, has put secondary market dealers on notice. The company identified eight unauthorized platforms attempting to sell its private shares and told prospective buyers in no uncertain terms: those transactions won’t work.

Any transfers conducted through these unauthorized channels will be considered null and void, according to Anthropic. The company isn’t just discouraging the practice. It’s saying the shares literally cannot change hands without its board signing off first.

## The blacklist and why it exists

The eight firms Anthropic specifically named as unauthorized include Open Doors Partners and Unicorns Exchange, among others. These platforms have apparently been marketing access to Anthropic equity to investors eager to get a piece of one of the hottest AI companies on the planet.

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Anthropic’s preferred and common shares are both subject to strict transfer restrictions. That means even if someone hands over real money on one of these platforms, the transaction doesn’t actually result in share ownership. The buyer gets a receipt. Anthropic’s cap table stays exactly the same.

The company went further, explicitly prohibiting special purpose vehicles from acquiring its stock. SPVs are a common workaround in private markets, where a fund bundles investor capital to buy a single asset. Anthropic is saying that door is closed too, and any offers structured through SPVs should be disregarded entirely.

Perhaps the most pointed warning involved tokenized securities. Any claims about tokenized versions of Anthropic shares floating around should be treated as possible fraud, the company said.

## What this means for investors

If you’re an investor who has already purchased Anthropic shares through one of these unauthorized channels, the company’s message is grim. Those transactions are void. Not voidable, not subject to review. Void. That means the money you spent bought you nothing Anthropic is obligated to honor.

The tokenized securities angle is particularly worth watching. The pitch is attractive: fractional ownership, liquidity, 24/7 trading. But when the underlying company says it has no relationship with those tokens and considers them potential fraud, buyers are left holding a digital asset with no legal claim to anything.

The risk calculation for investors considering unauthorized secondary platforms just shifted. Even if a platform looks professional and quotes attractive prices, the fundamental question remains: can this transaction actually be completed? If the company’s board has to approve the transfer, and the company is publicly saying it won’t approve transfers from these platforms, then the answer is no.

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