Antares Nuclear

Redondo Beach, CA · Founded 2023 · Privately Held (backing)

Manufacturer of a transportable microreactor intended to provide reliable power in remote or austere environments. Antares Nuclear is based in Redondo Beach, CA and was founded in 2023. It was valued at $280 million at its Series B in Dec 2025, the last priced event on record. It has raised $604 million across 4 recorded rounds; the latest was a $470 million Series C in Jul 2026.

PMV mark · valuation
$279.9M
Oct 2026
Priced at
its Series B
Dec 2025
Total raised
$604.1M
Last round
Series C
Jul 2026
How much has Antares Nuclear raised?
$604.1Macross 4 recorded rounds · Oct 2023 – Jul 2026

Most recently, Antares Nuclear raised $470.0M in its Series C (Jul 2026).

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Antares Nuclear round by round

4 rounds
Jul 2026Series C$470.0M▮
Caffeinated CapitalleadParadigm (Crypto Fund)lead+ 3 more investors · free account
Dec 2025Series B$96.0M▮
Shine Capitallead+ 12 more investors · free account
Oct 2024Series A$30.0M▮
Oct 2023Seed Round$8.1M▮
Quint Capitallead+ 4 more investors · free account

How much has Antares Nuclear raised?

Antares Nuclear has raised $604 million across 4 recorded rounds since 2023. The largest was a $96 million Series B in Dec 2025; the most recent was a $470 million Series C in Jul 2026. 3 of the rounds disclosed a post-money valuation.

Antares Nuclear has filed 3 Form Ds with the SEC since 2023, most recently in Sep 2025 ($51 million sold to 31 investors).

Antares Nuclear investors

31 investors are on record for Antares Nuclear, including BoxGroup, Caffeinated Capital, Point72 Ventures and Shrug Capital. By type, the record holds 10 venture capital firms. The Series C in Jul 2026 drew 5 investors.

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Frequently asked about Antares Nuclear

How much has Antares Nuclear raised?
Antares Nuclear has raised $604.1M in total across 4 recorded funding rounds.
Who are Antares Nuclear's lead investors?
Lead investors in Antares Nuclear's recorded rounds include Alt Capital (San Francisco), Caffeinated Capital, Paradigm (Crypto Fund), Quint Capital, Shine Capital.
When was Antares Nuclear's last funding round?
Antares Nuclear's most recent recorded round was Series C in Jul 2026, raising $470.0M.