Private Market View

Castelion

El Segundo, CA · Founded 2022 · Privately Held (backing)

PA Mark · $/share
$175
Sep 2026
Implied valuation
$2.8B
Total raised
$464.1M
Last round
Later Stage VC
Aug 2025

Key facts

as of Sep 2026
  • Castelion’s last known valuation is $2.8B (Dec 2025).
  • It has raised $464.1M across 3 recorded rounds; the latest was Later Stage VC ($360.0M) in Aug 2025.
  • Notable investors include Andreessen Horowitz, General Catalyst, Lightspeed Venture Partners, Quiet Capital, Avenir Growth Capital — 26 tracked in total.
  • Private Market View tracks 2 recorded secondary trades in Castelion shares.
  • 1 investment vehicle was formed to buy Castelion shares in the last 12 months, reporting $2.0M sold to 23 investors, per SEC Form D filings.
  • Castelion has filed 3 Form Ds with the SEC since 2023, most recently Nov 2025 ($60.0M sold to 8 investors).
  • Status: Privately Held (backing).
PA Mark — composite indicative price
LOW confidence
~$175per share
as of Sep 2026 · the exact daily mark is a member feature
Composed from 2 inputs:3rd-party trades 100%
See the platform prints behind this mark →
Free account
See the evidence behind this price
  • ·Post-money valuations for all 3 rounds
  • ·The complete investor list — 26 names
  • ·Watchlist + deal alerts for Castelion
Create free account
No card required

Recorded secondary trades

2 on record · Dec 2025 – Apr 2026

2 trades between Dec 2025 and Apr 2026. Exact dates, prices and structures are available to Pro members.

Dec 2025peak 1 prints / monthApr 2026
Counts and months are public. The prints are the product.Unlock 2 trade prints

Institutional fund marks

No fund marks yet

No SEC-registered fund has reported a fair-value mark on Castelion in its N-PORT filings yet. We sweep new filings monthly.

Pro members can request priority coverage with a 48-hour turnaround.

Funding rounds

3 rounds
Aug 2025Later Stage VC$360.0MSEC filing▮
Nov 2024Later Stage VC$60.0MSEC filing▮
Sep 2023Early Stage VC$8.6MSEC filing▮
Full funding history →

Secondary demand: investment vehicles

from SEC Form D filings

In the last 12 months, 1 investment vehicle were formed to buy Castelion shares, reporting $2.0M sold to 23 investors. Most recent filing Oct 2025. Vehicles like these are how secondary buyers pool demand for a name; a rising count is a demand signal.

The vehicle list — each sponsor, filing date, amount sold and investor count — is a Pro table. Unlock the 1 vehicle →
Companies with the most vehicle activity →

About Castelion

Manufacturer of advanced hypersonic weapon systems designed to strengthen conventional deterrence through rapid, scalable production. The company offers vertically integrated development, hardware-rich testing, and designs optimized for manufacturability from the outset, enabling defense organizations to deploy high-performance strike systems at speed with enhanced reliability and affordability.

Sector
Business Products and Services (B2B)
HQ
El Segundo, CA, United States
Founded
2022
Employees
127
Ownership
Privately Held (backing)