San Francisco, August 3, 2026 — Horizon3 announced 2B, tripling from $650M Series D. Co-led by NightDragon and NEA. NodeZero autonomous production pentesting; 120% YoY ARR growth; over 7,000 organizations; 310,000 production tests claimed. New investors include Acrew, Blue Cloud, Demeter, EDBI, PSG, SAIC, Sapphire; returning Craft, Prosperity7, Qualcomm Ventures, Ridge, SignalFire. Dave DeWalt and Morgan Kyauk join board. Proceeds: GTM scale, Singapore/Australia expansion, autonomous blue-team remediation agents.