Funding round
Muon Space Series C
Muon Space, which works in satellite constellation design and construction in Mountain View, raised $250M in a Series C round announced on 20 Aug 2026, led by Eclipse, at a $1.50B post-money valuation. 14 firms took part. It is Muon Space's fourth venture round on record; the one before was a Series B in Jun 2025.
$250M
Amount raised
$1.50B
Post-money valuation
$1.25B pre-money
14
Investors
1 lead
13x
Step-up from the Series A
$119M in Aug 2022
17%
Stake sold
new money over the post-money
Valuation
What this round says about the price
This round priced Muon Space at $1.50B after the new money, 12.6 times the $119M of its Series A (Aug 2022). The $250M bought investors about 17% of the company. It came 14 months after Muon Space's Series B. It is 58% of the $431M Muon Space has raised in the venture rounds on record. No later venture round is on record for Muon Space.
Muon Space's funding rounds
Muon Space has 4 venture rounds on record. This one is highlighted.
Investors
Who put money in
Eclipse led the round with 13 other firms.
Lead investor
- Eclipse backs 79 venture-backed companies new investor
Also in the round
- backs 23 venture-backed companies new investor
- GV backs 428 venture-backed companies new investor
- Salesforce Ventures backs 314 venture-backed companies new investor
- Wellington Management new investor
- backs 12 venture-backed companies new investor
- backs 15 venture-backed companies new investor
- backs 65 venture-backed companies new investor
- backs 45 venture-backed companies new investor
- backs 85 venture-backed companies new investor
- backs 29 venture-backed companies new investor
- backs 41 venture-backed companies new investor
- backs 27 venture-backed companies new investor
- backs 14 venture-backed companies new investor
Use of proceeds
What the money is for
According to the announcement, the money goes to product development, scaling operations and working capital.
- Product development
- Scaling operations
- Working capital
Comparable rounds
How it compares
14 Series C rounds in Aerospace and Defence within a year either side disclosed an amount; the median was $244M, and this round was close to the median. The closest in time, other companies' Series C rounds in Aerospace and Defence:
| Company | Announced | Amount | Post-money | Led by |
|---|---|---|---|---|
| Castelion Aerospace and Defence | 19 Aug 2026 | $1.00B | $13.00B | J.P. MorganChase’s Strategic Investment Group and Andreessen Horowitz |
| Aerospace and Defence | 11 Aug 2026 | $250M | $2.50B | Sequoia Capital and American Strategic Technology Fund |
| The Exploration Company Aerospace and Defence | 8 Sep 2026 | $450M | not disclosed | Bessemer Venture Partners and Atomico |
| Aerospace and Defence | 1 Sep 2026 | $334M | not disclosed | Mitsubishi Electric and COFIDES |
| Aerospace and Defence | 7 Sep 2026 | $100M | not disclosed | Temasek and Seraphim Space |
| Aerospace and Defence | 16 Jul 2026 | $70M | not disclosed | Swisscom Ventures |
| Mach Industries Aerospace and Defence | 2 Jun 2026 | $300M | $1.80B | Infinite Capital and Ribbit |
| Sierra Space Aerospace and Defence | 5 Mar 2026 | $550M | $8.00B | LuminArx Capital Management |
Sources
Where this comes from
Reported by 7 sources.
Questions
Frequently asked
How much did Muon Space raise in its Series C round?
Muon Space raised $250M in its Series C round, announced in Aug 2026.
Who led Muon Space's Series C round?
Eclipse led it, with Galvanize, GV, Salesforce Ventures, Wellington Management and I Squared and 8 more.
What was Muon Space's valuation at the Series C round?
$1.50B post-money ($1.25B pre-money).
How does it compare with other Series C rounds in Aerospace and Defence?
14 Series C rounds in Aerospace and Defence within a year either side disclosed an amount; the median was $244M, and this round was close to the median.