Anthropic is offering some current and former employees the ability to sell shares in the company at a valuation of about $350 billion, according to people familiar with the matter — allowing them to cash in at the level of a recent $30 billion fundraising.The company has lined up $5 billion to $6 billion for the share sale, but the final amount will depend on how many eligible Anthropic employees opt to sell, said one of the people, who asked not to be identified because the information is priv...