Island closed a $400M Series F late-stage follow-on round announced Sept. 24, 2026, at a $6.4 billion valuation — a $1.8 billion increase from its prior raise. The round was led by Evolution Equity Partners, with participation from J.P. Morgan, Sequoia Capital, Georgian and other institutional backers. The SiliconANGLE report did not disclose specific client, revenue, pipeline or employee-count metrics, nor a detailed use of proceeds or expansion plan, focusing instead on its Chromium-based enterprise browser for securing SaaS application access.