Anthropic Slashes Unauthorized Share Trading List From Eight to Four Amid Backlash

Anthropic halved the number of platforms it says are facilitating unauthorized trades of its shares, revising a public warning on Friday, May 30, 2026, after the original list caused panic among investors and a sharp rebuttal from one of the firms. The artificial intelligence company’s updated blog now names only four platforms — Open Door Partners, Unicorns Exchange, Pachamama, and Upmarket — removing former targets including secondary marketplace Hiive. Anthropic reiterated that any stock sales or transfers through these firms are void and won’t be recognized on its books. The reversal follows confusion and sharp selloffs in publicly traded funds with indirect exposure to the startup. Hiive CEO Sim Desai said on LinkedIn that Anthropic’s initial post damaged his firm’s reputation, adding the company did not consult with Hiive before going public. The dispute unfolds amid soaring investor appetite: Anthropic closed a $65 billion funding round on Thursday that values the company at $965 billion including the new investment, overtaking rival OpenAI’s valuation for the first time.