S-1: as of September 30, Anthropic had 11,900+ customers spending $100,000+ annually, 1,900+ customers spending $1M+, and ~250 customers spending $10M+ (Rebecca Bellan/TechCrunch)
https://techcrunch.com/2026/10/26/anthropics-ipo-filing-reveals-its-strategy-for-keeping-enterprise-customers-hooked/
http://www.techmeme.com/261026/p36#a261026p36