Anthropic Claude Code Loses Three Core Members Before IPO, Product Lead Joins OpenAI

Anthropic's AI coding product Claude Code has lost three core members within two weeks, including product lead Cat Wu, who has joined OpenAI to manage core products. The departures come as Anthropic files an S-1/A and prepares for an IPO. The filing shows quarterly revenue rose from $376 million in Q1 2025 to $16.956 billion in Q3 2026, while headcount grew from about 940 at end-2024 to roughly 5,300 by September 2026, with an overall regrettable attrition rate of about 1%.