What Is Castelion’s Valuation in 2026? $13B After $1B
Castelion closed a $1B Series C on August 19, 2026: $800M equity plus a $250M revolver, at $13B. JPM, a16z, and Carlyle co-led. Google still ranks the $350M Series B. Revenue was not disclosed.
Defense Tech Venture Capital & Dual-Use Startup Funding
Defense technology has re-emerged as a major venture capital category, with startups building autonomous systems, space infrastructure, cybersecurity, and AI-enabled defense platforms. Our defense-tech coverage tracks the funds and rounds backing this sector.
Defense Tech Investment Areas
- Autonomous systems: Drones, robotics, and ground mobility
- Space & communications: Satellites, launch, and secure connectivity
- Cyber & intelligence: Threat detection, data fusion, and secure infrastructure
- Dual-use platforms: Commercial applications with defense-grade demand
Explore defense tech venture capital news below.
Related Articles (60 articles)
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Smack’s $61M Series B: Decision AI From Command Post to Tactical Edge
Costanoa and First In led Smack Technologies’ $61M Series B (total >$90M) to build Alpha hardware that pairs with Omega command planning already moving into U.S. military production.
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August 14–19 VC News: Etched $21B, Castelion $13B, Unitree IPO
Aug 14–19, 2026: Etched $700M at $21B (Jane Street), Castelion $1B Series C at $13B, ALSO $150M, Unitree’s STAR Market IPO, Rillet $1B, SpaceX closed Cursor, Stripe–OpenRouter announced Aug 19 ($7.5B is press), plus Databricks $190B, Accel $3.5B, Higgsfield, Groq, Wispr, and Gravis.
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Why Did Heaviside Hit $600M Three Months After Stealth?
Heaviside’s $60M Series B (Felicis, Aug 12) prints $600M three months after a $28M stealth A. Nammo will supply warheads. Revenue and contract values were not disclosed. Here is what the round actually tells you.
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August 11–12 VC News: Personal AI, Defense Drones, MSK OS, Agent Security & Insurance Rails
Gap-fill investment explainers for Aug 11–12: River AI $1.1B, Neros $250M, Flagler $50M, Obsidian $85M, Noosphere $10.25M, and Axle $17.5M — who uses the products and why these funds fit.
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Neros’s $250M Series C at $2.5B: Sequoia and ASTF Scale Attritable Drones
Torrance defense startup Neros raised $250M Series C at $2.5B post-money co-led by Sequoia and the American Strategic Technology Fund to ramp Archer AI strike and Bandit interceptor drones.