Castelion
PrivateLast Round
Series C
Aug 19, 2026
Est. Valuation
$13B
Total Funding Raised
$1.29B
Momentum
Top 1%
of companies Caplight tracks
Company Overview
Castelion is an aerospace and defense company that designs, tests, and manufactures next-generation hypersonic strike weapons and military systems.
Sector
Frontier & Industrial Tech
Verticals
Defense Tech, Computing Hardware, Space Technology
Business Model
B2G
Customer Profile
Government Contracts, Hardware Sales
AI Layer
Application
Keywords
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Castelion Comparables
Compare Castelion with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Specter Aerospace | 78% | |
| Hypersonica | 78% | |
| Lockheed Martin Corporation | 75% |
Castelion Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Series C | Aug 19, 2026 | ||||
| Series B | Dec 5, 2025 | ||||
| Debt | Jan 29, 2025 | ||||
| Series A | Jan 29, 2025 | ||||
| Seed | Oct 5, 2023 |
Secondary Market Activity
Bids, offers, and trades by month
| Operation | Date | Price | Size | Share Class | Structure |
|---|---|---|---|---|---|
BID |
Key People
Founding team and executive leadership
Castelion Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Andreessen Horowitz | Series B, Series A, Seed, Series C |
| Interlagos Capital | Series B, Series A, Series C |
| Lavrock Ventures | Series B, Series A, Series C, Seed |
| BlueYard Capital | Seed, Series B, Series A |
| Cantos Ventures | Series B, Series A |
| The Carlyle Group | Series C |
| General Catalyst | Series B, Series C |
Market signals
Structured signals derived from secondary market and firmographic data.
- Aug 21, 2026
Monthly visitors increased 37% MoM.
- Aug 19, 2026
Grew 34% QoQ, from 182 to 243 employees.
Recent news
Latest coverage and updates
- partners_withSep 14, 2026
Castelion Corporation partnered with Air Force on Sep 14th '26.
- partners_withSep 14, 2026
Castelion Corporation partnered with Army Corp. on Sep 14th '26.
- signs_new_clientSep 14, 2026
Castelion Corporation signed new client Navy Enterprise on Sep 14th '26.
- invests_into_assetsSep 10, 2026
Castelion Corporation invested into assets: campus in the amount of $220M in New Mexico, United States, Northern America, Americas on Sep 9th '26.
- attends_eventSep 9, 2026
Castelion Corporation attended event New Mexico IDEA Economic Development Excellence Awards on Sep 9th '26.
Castelion Filings
Explore SEC and related filing metadata, where available.
| Type | Date | Amount Offered | Amount Sold | Filing | Pages | Download |
|---|
Filing documents are not displayed on this public page. Request access to learn about available coverage.
Request accessAppears On
Curated lists and screens where this company is featured.
Frequently Asked Questions
Common questions about Castelion's valuation, stock price, and market status.
Is Castelion a public or private company?
Castelion is a private company.
What is the current stock price of Castelion?
Castelion is a private company with no public stock price. Caplight tracks Castelion's secondary market activity and provides MarketPrice™ estimates to Caplight users.
How much is Castelion worth (valuation)?
Castelion's valuation is estimated at $2.8B based on funding round data.
Can I buy Castelion stock?
Castelion shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors. Visit https://www.caplight.com to learn more.
When was Castelion's last funding round?
Castelion's most recent funding round was Series B on December 5, 2025.
Who are the main investors in Castelion?
Key investors in Castelion include Andreessen Horowitz, Lavrock Ventures, Silicon Valley Bank, Lightspeed Venture Partners, Altimeter Capital Management.
Will Castelion IPO soon?
No public IPO plans have been announced for Castelion.
How can I track Castelion secondary market activity?
Caplight tracks bids, offers, and trades for private companies. Visit https://www.caplight.com to monitor Castelion's secondary market activity and sign up for updates.