Funding round
Castelion Series A
Castelion, which works in defense technology research and development in Torrance, raised $70M in a Series A round announced on 29 Jan 2025, led by Lightspeed Venture Partners. 7 firms took part. It is Castelion's third venture round on record; the one before was a Seed in Oct 2023.
$70M
Amount raised
Not disclosed
Post-money valuation
7
Investors
1 lead
Valuation
What this round says about the price
Castelion did not disclose a valuation in this round. It came 15 months after Castelion's Seed. It is 4.9% of the $1.44B Castelion has raised in the venture rounds on record. Castelion raised again 11 months later: a Series B round of $350M in Dec 2025. Its next priced round, a Series C in Aug 2026, valued it at $13.00B.
Castelion's funding rounds
Castelion has 5 venture rounds on record. This one is highlighted.
- Pre-seed 1 Apr 2023, led by Lavrock Ventures $5.4M
- Seed 5 Oct 2023, led by Andreessen Horowitz and Lavrock Ventures $14M
- Series A this round 29 Jan 2025, led by Lightspeed Venture Partners $70M
- Series B 5 Dec 2025, led by Altimeter and Lightspeed Venture Partners $350M
- Series C 19 Aug 2026, led by J.P. MorganChase’s Strategic Investment Group, Andreessen Horowitz and Carlyle $1.00B$13.00B post-money
Investors
Who put money in
Lightspeed Venture Partners led the round with 6 other firms.
Lead investor
- Lightspeed Venture Partners backs 454 venture-backed companies new investor
Also in the round
- Andreessen Horowitz backs 722 venture-backed companies new investor
- backs 22 venture-backed companies new investor
- backs 36 venture-backed companies new investor
- backs 24 venture-backed companies new investor
- backs 28 venture-backed companies new investor
- Interlagos new investor
Use of proceeds
What the money is for
According to the announcement, the money goes to product development and scaling operations.
- Product development
- Scaling operations
Comparable rounds
How it compares
46 Series A rounds in Aerospace and Defence within a year either side disclosed an amount; the median was $20M, and this round was 3.5 times the median. The closest in time, other companies' Series A rounds in Aerospace and Defence:
| Company | Announced | Amount | Post-money | Led by |
|---|---|---|---|---|
| Aerospace and Defence | 13 Jan 2025 | $32M | not disclosed | 8VC |
| Aerospace and Defence | 27 Jan 2025 | $31M | not disclosed | Point72 Ventures |
| Aerospace and Defence | 19 Feb 2025 | $17M | not disclosed | Caruso Ventures and Howdy Partners |
| Aerospace and Defence | 10 Dec 2024 | $14M | not disclosed | Paris Régions Venture Fund |
| Aerospace and Defence | 20 Nov 2024 | $44M | not disclosed | Spark Capital and Adjacent |
| Aerospace and Defence | 17 Mar 2025 | $35M | not disclosed | Vy Capital |
| Aerospace and Defence | 18 Mar 2025 | $25M | not disclosed | Hyperion |
| Aerospace and Defence | 12 Nov 2024 | undisclosed | not disclosed | Type One Ventures and Industrious Ventures |
Sources
Where this comes from
Reported by 2 sources.
Questions
Frequently asked
How much did Castelion raise in its Series A round?
Castelion raised $70M in its Series A round, announced in Jan 2025.
Who led Castelion's Series A round?
Lightspeed Venture Partners led it, with Andreessen Horowitz, Lavrock Ventures, Cantos, First In and BlueYard and 1 more.
What was Castelion's valuation at the Series A round?
It was not disclosed.
How does it compare with other Series A rounds in Aerospace and Defence?
46 Series A rounds in Aerospace and Defence within a year either side disclosed an amount; the median was $20M, and this round was 3.5 times the median.
Did Castelion raise again after this round?
Yes: a Series B round in Dec 2025 of $350M.