Atlas Atomics
Stealth nuclear startup co-founded by Vivek Ramaswamy developing an improved heavy-water reactor that does not need enriched uranium
Atlas Atomics is a stealth-mode nuclear energy startup co-founded and backed by Vivek Ramaswamy, the Strive founder and 2026 Ohio gubernatorial candidate. It is led by co-founder Kevin Gan, who spent more than 15 years investing in energy companies, most recently at Millennium and earlier at D.E. Shaw; Balendra Sutharshan, former chief operating officer of Oak Ridge National Laboratory, is chief nuclear officer. The company is developing an improved heavy-water reactor that does not rely on enriched uranium, the lineage of Canada's CANDU and India's IPHWR designs, which it argues could cut build and operating costs; reactor design, timeline and deployment plans have not been made public and the website shows only a contact address. Bloomberg reported on 2026-10-08/09, citing people familiar, that Atlas raised about $400M in a Series A led by General Catalyst with Andreessen Horowitz participating, at a valuation of about $1.9B. Atlas Atomics, General Catalyst and a16z all declined to comment and the company has not confirmed the round, so it is recorded as reported only.
Energy
Current Valuation
Private
PRIVATE
IPO Outlookprivate
Is Atlas Atomics going public?
No. Atlas Atomics is private and has not filed to go public. There is no S-1 on file.
What is Atlas Atomics' valuation in 2026?
No confirmed valuation is on record for Atlas Atomics. The roster shows funding and investors where they are public; it does not estimate a mark.
Has Atlas Atomics filed an S-1?
No public S-1 is on file for Atlas Atomics.
Who are Atlas Atomics' investors?
Atlas Atomics' investors include General Catalyst, Andreessen Horowitz, Vivek Ramaswamy.
Is Atlas Atomics publicly traded — can you buy Atlas Atomics stock?
No. Atlas Atomics is a private company — its shares are not listed on any exchange and there is no ticker. The routes to exposure are pre-IPO secondary marketplaces and funds (accredited investors), employee tender offers when the company runs one, and public companies with read-through exposure. QuantLogix maps every route it can verify for Atlas Atomics on its Pre-IPO Access Desk.
Answers are derived from the roster record shown on this page — filing status, last round and confirmed marks. Where the record is silent, the answer says so rather than guessing.
Company Profile
Growth
Reported ~$400M Series A at ~$1.9B led by General Catalyst with a16z (Bloomberg, Oct 2026, unconfirmed). Stealth; heavy-water reactor design on unenriched uranium; ex-ORNL COO as chief nuclear officer.
Last Round
Series A — $400M (Oct 2026) · Lead: General Catalyst
Fundraising Status
Series A · $400M · this month
private1 disclosed rounds
Series A Impact
Round Size
$400M
Primary financing announced
Post-Money Valuation
$1.9B
Company-announced mark
Round / Post-Money
21.1%
New capital ÷ post-money
Step-up compares disclosed post-money valuations. Round / post-money is a financing-size ratio, not an ownership or dilution estimate.
Funding History
| Round | Amount | Date | Lead Investor | Post-Money |
|---|
| Series A | $400M | Oct 2026 | General Catalyst | $1.9B |
Talent Signal
Hiring data for Atlas Atomics has not been collected yet — the monthly talent sweep hasn't reached this company. Check back soon.
Investors
General Catalyst · Andreessen Horowitz · Vivek Ramaswamy
Products
- Improved heavy-water reactor using natural (unenriched) uranium — design, output and timeline undisclosed
Competitors
Oratomic · X-energy · Oklo · TerraPower · Kairos Power
NuclearEnergyClimate TechDeep TechStealthRecently Funded
Private-company numbers are not real-time. Reflects publicly disclosed valuations from press releases, news reports, and tender offers as of recent date. Refreshed quarterly.