Horizon3, the AI-Native Proactive Security Company behind NodeZero®, the World's Best AI Hacker™, announced a $250 million Series E at a valuation of more than $2 billion, tripling its valuation from $650 million at Series D in just over a year. The oversubscribed round was co-led by existing investors NightDragon and NEA, with participation from seven new investors and five returning backers.

New investors: Acrew Capital, Blue Cloud Ventures, Demeter Group, EDBI (Singapore), PSG, SAIC, and Sapphire Ventures.

Existing investors: Craft Ventures, Prosperity7 Ventures, Qualcomm Ventures, Ridge Ventures, and SignalFire.