PANews reported on May 13 that Anthropic and OpenAI recently warned that equity transfers without company approval, including transactions conducted through SPVs, tokenized instruments, or forward contracts, may be invalid and not recognized by the companies, causing a sharp drop in the related PreStocks tokens on the Solana chain.

Data shows that Anthropic PreStocks fell by approximately 38%, while OpenAI PreStocks dropped by about 46%. Both companies emphasized that their common and preferred stock are subject to strict transfer restrictions, and transactions without board approval will not be recognized by shareholders. OpenAI further warned that the transactions may also violate U.S. securities laws, and the buyers may not receive any actual economic benefits.

The report states that PreStocks (Pre-IPO stocks) are tokenized tools for tracking the implied valuation of unlisted companies, but they have not been officially authorized by the target companies.