BlockBeats News, May 12th, Anthropic's implied valuation on the Juipter Pre-IPO market plummeted over 28% today, now standing at $1.37 trillion, erasing about 35% from its peak valuation of over $2.1 trillion. OpenAI also faced a market value slaughter on Juipter, with its implied valuation dropping over 32% today, currently at $1.07 trillion.

Earlier today, Anthropic and OpenAI announced a comprehensive ban on aftermarket share flipping: Unauthorized SPV investments are all null and void. OpenAI stated that all unauthorized equity transfers are invalid, including direct sales, SPV shares, tokenized rights, and forward contracts. Both buyers and sellers will not receive any economic value and may also violate U.S. securities laws. Anthropic has similarly tightened its policies, using the term "void" directly on its equity trading policy page instead of "voidable." Anthropic also named several platforms such as Open Door Partners, Unicorns Exchange, Forge Global, and Hiive, declaring that shares purchased through these channels do not carry any shareholder rights.