Tech Company Financing Transactions
Castelion Funding Round
Castelion, based in Washington, secured $350 million from Altimeter Capital, Lightspeed Venture Partners and private investors.
Transaction Overview
Company Name
Announced On
7/3/2025
Transaction Type
Venture Equity
Amount
$350,000,000
Round
Series B
Investors
Altimeter Capital (Lead Investor)
Lightspeed Venture Partners (Lead Investor)
Proceeds Purpose
Proceeds purposes were not disclosed.
Company Information
Company Status
Private & Independent
Industry
Defense
Mailing Address
Undisclosed
Washington, DC Undisclosed
USA
Washington, DC Undisclosed
USA
Phone
Undisclosed
Website
Email Address
Overview
Castelion is bringing a new approach to defense development and production: one that focuses on short, iterative design cycles, rapid testing in development, and modern commercial manufacturing strategies for production at scale. We're designing, building, and testing next generation long range strike weapons systems to give America and its Allies a definitive edge and deter future conflicts.
Management Team
Title
Name
Email & Social
Browse more venture capital transactions:
Prev: 7/3/2025: Climeworks venture capital transaction
Share this article
About Our VC Transactions Data
We do our best to report on all VC transactions involving tech companies. VC investment data records reported here are derived from publicly available VC deal announcements. The data comes to us via our partnership with VentureDeal.com, an affiliated venture.
Additional Resources for Entrepreneurs