United States · 
Who invested in Antares?
Antares's investors include Caffeinated Capital, Shine Capital, BoxGroup, Paradigm and Point72 Ventures, and 5 more on record. Paradigm led its latest round.
2026
$96MSeries B$470MSeries C
United States · Series C startup
Who invested in Antares
2 rounds we have observed, with the 10 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.
Raised 3 months ago
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Funding summaryUpdated 5 Nov 2026
$566Mraised across 2 rounds since 2025, from 6 sources
$96MSeries B$470MSeries C
- Latest round
- Series C, $470MAug 2026
- Led by
- Paradigm and Caffeinated Capital
- Step-upi
- 4.9×
- Investors
- 10 (3 led)
The funding story
Each circle is a round, placed by date and sized by amount. The line above is the running total.
- First round
- Series B, $96M Dec 2025
- Biggest round
- $470M Series C · Aug 2026
- Between rounds
- 8 months from the last two
The rounds
- Aug 2026Series C$470M3 new3 returning
Reported by TechCrunch and 3 othersSEC filing: $126M sold
- Dec 2025Series B$96M7 new
Reported by TechCrunch and 1 otherSEC filing: $51M sold, first sale Sept 2025
Funding filed with regulators
Antares filed one raise, $30K in all. Filings say how much was sold and to how many investors; they never name the investors.
- May 2025$30KSEC Form D
Founders and team
From Antares's own website: 1 founder, 12 on the team.
Jordan BrambleCEO & Co-Founder
- Mark MassieChief Engineer
- Rian BahranChief Nuclear Officer
- Alec TodrykHead of Finance
- Christian KalinHead of Operations
- Doug CrawfordHead of Manufacturing & Test Engineering
- Jason AndrusHead of Nuclear Ops & Regulatory
- Matt GriffinHead of Nuclear Affairs
- Nader SatvatHead of Nuclear Engineering
- Reuven FridmarHead of Talent
- Scott WalshHead of Reactor Hardware Engineering
- Tom MancinelliHead of Strategy & Policy
- Will MadsenHead of Mission Engineering
Who was in which round
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
Everyone who backed them
FiftyThree StationsGrowth equity1round
Missing a round, or an investor who was in one? Tell us.
Also claim to have backed them
These 10 firms list Antares as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.
Quick answers about Antares
How much has Antares raised?
Antares has raised $566M across 2 rounds since 2025.
When did Antares last raise?
Antares's most recent round was a Series C of $470M in Aug 2026, led by Paradigm.
What was Antares's biggest round?
Its most recent round, $470M in Aug 2026, is also its largest on record.
Who backed Antares first?
Antares's first round on record, in Dec 2025, was backed by Shine Capital, BoxGroup and Caffeinated Capital and 4 others.
What stage is Antares at?
Antares's latest named round is a Series C, in Aug 2026.
Where is Antares based?
Antares is based in the United States.
Who led Antares's rounds?
Shine Capital led the Series B in 2025; Paradigm led the Series C in 2026.
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