Island
IS
Island develops an enterprise web browser for managed work. It allows administrators to set conditional access rules and apply controls such as copy and paste, downloads, printing, and screen capture for web applications. A management console and API provide policy management, device visibility, and audit logs that can be exported to security tools.
Founded by Michael Fey (Co-Founder & CEO), Dan Amiga (Co-Founder & CTO)
Blended valuation$5.5B$4B secondary
Valuation history
Weekly blended valuation with priced funding rounds marked on the timeline.
$6.6B
blended valuationfunding round
Mar 24, 2025$3.1BOct 5, 2026
All rounds
7 funding rounds, newest first.
| Round | Announced | Raised | Post-money |
|---|---|---|---|
| Series F+ | Sep 24, 2026 | $400M | $6.4B |
| Series E | Mar 26, 2025 | $250M | $4.8B |
| Series D | Apr 30, 2024 | $175M | $3B |
| Series C | Oct 23, 2023 | $100M | $1.5B |
| Series B | Nov 10, 2022 | $115M | $1.3B |
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Investors
18 investors across all rounds.
- IPInsight Partners
- GEGeorgian
- COCoatue
- CICisco Investments
- EEEvolution Equity Partners
- SCSequoia Capital
- CYCyberstarts
- STStripes
- GSG Squared
- GCGeodesic Capital
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Secondary market activity
Recent buy and sell interest for Island shares on the secondary market.
| Kind | Implied valuation | Price / share | Date |
|---|---|---|---|
| $4B | $9.94 | Sep 29, 2026 | |
| $3.9B | $8.08 | Jul 24, 2026 | |
| $4.2B | $8.60 | Jul 17, 2026 |
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Data as of Oct 14, 2026. Valuations are estimates blended from primary and secondary-market signals — not investment advice.