Castelion Series B
- Company
- Castelion
- Type
- Venture round
- Status
- Completed
- Date
- 5 Dec 2025
- Value
- US$350m
- Value basis
- Series B led by Altimeter Capital and Lightspeed
- Region
- US
- Segment
- Venture and growth equity
Parties
- Castelion issuer
Key terms
- Structure
- Series B led by Altimeter Capital and Lightspeed
Sources
- Castelion: closes $350 million Series B castelion.com · 5 Dec 2025
- Castelion Form D filed with the SEC sec.gov · 20 Nov 2025
Record DEF-INV-2025-0034. Investments are kept apart from the financings register and never counted in debt totals.
