Anthropic Cracks Down on Unauthorized Secondary Market Platforms for Share Sales
Key Takeaways
- ▸Anthropic has blacklisted eight secondary market platforms and declared any unauthorized share transactions void
- ▸The move reflects explosive investor demand for Anthropic shares amid rumors of a $900 billion fundraising round
- ▸Anthropic explicitly prohibits SPVs and derivative instruments from offering access to its equity without board approval
Summary
Anthropic has issued a stern warning to investors, publicly naming eight secondary market platforms—including Open Doors Partners, Unicorns Exchange, Forge Global, and Sydecar—that are not authorized to facilitate the sale or transfer of its shares. The company made clear that any stock transactions conducted through these platforms are void and will not be recognized on its books, citing transfer restrictions on both preferred and common stock that require board approval for all share transfers.
The warning arrives at a moment of heightened investor demand for Anthropic shares, particularly on secondary markets. With the company rumored to be raising fresh funding at a $900 billion valuation, secondary market brokers have described Anthropic as one of the 'hardest' stocks to source. The ban applies not only to direct share sales but also to derivative instruments like tokenized securities, perpetual futures contracts, and special purpose vehicles (SPVs) that claim to offer exposure to Anthropic equity.
Some of the named platforms have disputed the claims, with Forge Global stating it was included 'erroneously' and Sydecar clarifying it only provides administrative services. However, Anthropic's position is unambiguous: neither fraudulent share claims nor legitimate-seeming investment vehicles can bypass the company's transfer restrictions without explicit board authorization.
- Secondary markets for AI company shares are proliferating, driven by investor appetite for pre-IPO exposure to high-growth startups


