Anthropic IPO filing: $1.7B quarterly payroll, about $107K per employee monthly

Anthropic's amended S-1 filing revealed that the company had $1.7 billion in personnel expenses from July to September, with 5,300 employees averaging over $107,300 per month. This includes standard cash salaries, bonuses, benefits, and employer payroll taxes, as well as $1.1 billion in stock-based compensation expenses. In 2023, Anthropic spent more than twice as much on personnel as it brought in from customers, but personnel costs decreased to 15% of revenue in the first nine months of 2026. The company has filed for a potentially record-breaking IPO, which could impact its stock-based compensation charges.