Funding round
Sierra Space Series C
Sierra Space, which works in space systems and subsystems manufacturing in Louisville, raised $550M in a Series C round announced on 5 Mar 2026, led by LuminArx Capital Management, at a $8.00B post-money valuation. 5 firms took part. It is Sierra Space's third venture round on record; the one before was a Series B in Sep 2023.
$550M
Amount raised
$8.00B
Post-money valuation
5
Investors
1 lead
1.5x
Step-up from the Series B
$5.30B in Sep 2023
6.9%
Stake sold
new money over the post-money
Valuation
What this round says about the price
This round priced Sierra Space at $8.00B after the new money, 1.5 times the $5.30B of its Series B (Sep 2023). The $550M bought investors about 6.9% of the company. It came 30 months after Sierra Space's Series B. It is 25% of the $2.24B Sierra Space has raised in the venture rounds on record. No later venture round is on record for Sierra Space.
Sierra Space's funding rounds
Sierra Space has 3 venture rounds on record. This one is highlighted.
- Series A 19 Nov 2021, led by General Atlantic, Coatue and Moore Strategic Ventures $1.40B$4.50B post-money
- Series B 26 Sep 2023, led by MUFG Bank, Kanematsu and Tokio Marine & Nichido Fire Insurance $290M$5.30B post-money
- Series C this round 5 Mar 2026, led by LuminArx Capital Management $550M$8.00B post-money
Investors
Who put money in
LuminArx Capital Management led the round with 4 other firms.
Lead investor
- backs 4 venture-backed companies new investor
Also in the round
- General Atlantic backs 134 venture-backed companies new investor
- Coatue backs 229 venture-backed companies new investor
- Moore Strategic Ventures new investor
- Andalusian Private Capital new investor
Use of proceeds
What the money is for
According to the announcement, the money goes to product development.
- Product development
Comparable rounds
How it compares
20 Series C rounds in Aerospace and Defence within a year either side disclosed an amount; the median was $250M, and this round was 2.2 times the median. The closest in time, other companies' Series C rounds in Aerospace and Defence:
| Company | Announced | Amount | Post-money | Led by |
|---|---|---|---|---|
| Aerospace and Defence | 26 Mar 2026 | $170M | not disclosed | Mohari Ventures Natural Capital |
| Aerospace and Defence | 18 Mar 2026 | $110M | not disclosed | Airtree |
| Mach Industries Aerospace and Defence | 2 Jun 2026 | $300M | $1.80B | Infinite Capital and Ribbit |
| K2 Space Aerospace and Defence | 11 Dec 2025 | $250M | $3.00B | Redpoint Ventures |
| Forterra Aerospace and Defence | 12 Nov 2025 | $238M | $1.00B | Moore Strategic Ventures |
| Quantum Systems Aerospace and Defence | 27 Nov 2025 | $210M | $3.50B | Balderton Capital |
| Aerospace and Defence | 16 Jul 2026 | $70M | not disclosed | Swisscom Ventures |
| Castelion Aerospace and Defence | 19 Aug 2026 | $1.00B | $13.00B | J.P. MorganChase’s Strategic Investment Group and Andreessen Horowitz |
Sources
Where this comes from
Reported by 6 sources.
Questions
Frequently asked
How much did Sierra Space raise in its Series C round?
Sierra Space raised $550M in its Series C round, announced in Mar 2026.
Who led Sierra Space's Series C round?
LuminArx Capital Management led it, with General Atlantic, Coatue, Moore Strategic Ventures and Andalusian Private Capital.
What was Sierra Space's valuation at the Series C round?
$8.00B post-money.
How does it compare with other Series C rounds in Aerospace and Defence?
20 Series C rounds in Aerospace and Defence within a year either side disclosed an amount; the median was $250M, and this round was 2.2 times the median.