HiddenLayer raises $100M Series B for AI agent security

HiddenLayer announced on September 2, 2026 that it raised a $100 million Series B round to expand its AI security platform for models and agentic workflows. The round is led by Delta-v Capital with Ten Eleven Ventures, Morgan Stanley, Microsoft’s M12 and Booz Allen Ventures participating.([hiddenlayer.com](https://www.hiddenlayer.com/news/hiddenlayer-100m-series-b-ai-security))