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Exclusive | Cyber Startup Horizon3.ai Raises $250 Million - WSJ
Horizon3.ai is a cybersecurity startup that provides tools for autonomous penetration testing. The company targets businesses looking to enhance their security measures against automated attacks, and it has recently raised significant funding to expand its operations and technology.
Exclusive | Cyber Startup Horizon3.ai Raises $250 Million WSJ

| Aug 15, 2026 | Commonwealth Fusion Systems | $1.00B | Series B | United States |
| Aug 15, 2026 | Rune Energy | $7.0M | Early VC | United States |
| Aug 15, 2026 | CAIS | $170.0M | — | United States |
| Aug 14, 2026 | Neros | $250.0M | Series C | United States |