Startup · United States

Valar Atomics

HQ El SegundoFounded 202311-50 employees

Atomics is pioneering a new era in nuclear energy by developing modular High-Temperature Gas Reactors (HTGRs) to produce abundant, clean, and cost-effective power. By deploying these reactors in large-scale "gigasites," the company aims to achieve economies of scale, offering grid-independent solutions for hydrogen production, data center power, industrial applications, and synthetic fuels. Founded in 2023 by Isaiah Taylor, Valar Atomics has secured $21 million in funding and assembled a team of 35 nuclear experts. Their innovative approach positions them to revolutionize energy production and support global decarbonization efforts.

StartupPrototypeAdvanced fission reactors Microreactors

Funding6 rounds · $1.49B

Equity raised: $1.49B
Debt, secondaries & grants: $310M
Latest: $200MDebt · Aug 3, 2026
Last valuation: $6.00BPost-money · Series B · Aug 3, 2026

Cumulative raised$1.49B

Feb 19, 2025Aug 3, 2026

Valuation over time$6.00B · Aug 3, 2026

Valuations by round
Announced	Stage	Valuation	Basis
Feb 19, 2025	Seed	$36.3M	Post-money
Nov 10, 2025	Series A	$260M	Post-money
Mar 31, 2026	Series B	$2.00B	Post-money
Aug 3, 2026	Series B	$6.00B	Post-money

Funding rounds
Announced	Stage	Amount	Valuation	Lead investors	Other investors	Confidence
Aug 3, 2026	Debt	$200M	—	Erebor Bank	—	Confirmed
Aug 3, 2026	Series B	$1.00B	$6.00B	Sequoia Capital	Conviction, Dream Ventures, HOF Capital, Point72 Ventures, Riot, Snowpoint, Valor Equity Partners	Confirmed
Mar 31, 2026	Debt	$110M	—	—	—	Reported
Mar 31, 2026	Series B	$340M	$2.00B	—	Palmer Luckey, Shyam Sankar	Reported
Nov 10, 2025	Series A	$130M	$260M	Day One Ventures, Dream Ventures, Snowpoint	Contrary Capital, Crosscut Ventures, Palmer Luckey, Shyam Sankar	Reported
Feb 19, 2025	Seed	$19.0M	$36.3M	Riot	AlleyCorp, Day One Ventures, Initialized Capital	Reported

Debt
Led by Erebor Bank
Confirmed
$200M
Aug 3, 2026
Series B
Led by Sequoia Capital
With Conviction, Dream Ventures, HOF Capital, Point72 Ventures, Riot, Snowpoint, Valor Equity Partners
Valuation $6.00B
Confirmed
$1.00B
Aug 3, 2026
Debt
$110M
Mar 31, 2026
Series B
With Palmer Luckey, Shyam Sankar
Valuation $2.00B
$340M
Mar 31, 2026
Series A
Led by Day One Ventures, Dream Ventures, Snowpoint
With Contrary Capital, Crosscut Ventures, Palmer Luckey, Shyam Sankar
Valuation $260M
$130M
Nov 10, 2025
Seed
Led by Riot
With AlleyCorp, Day One Ventures, Initialized Capital
Valuation $36.3M
$19.0M
Feb 19, 2025

Raised counts equity rounds; debt, secondary sales and grants are totaled separately. Amounts in other currencies are converted at the announcement month's average rate. A ~ marks an estimated or converted amount.

Systems2

Ward 250

Nuclear test reactor under development.

Maturity not rated

Ward Zero

Non-nuclear thermal test system used in reactor development.

Maturity not rated

Newest unveiled first. Open a system for its milestone timeline, components and sources.

Capabilities2

Capabilities
Technology	Role	Maturity	TRL	Notes	Confidence
Advanced fission reactors	Developer	—	—	Company-reported capability or material relationship; this mapping does not imply government endorsement, qualification or a contract.	Reported
Microreactors	Developer	Prototype	—	Ward 250 (100 kWt HTGR test reactor) reached zero-power criticality at the Utah San Rafael Energy Lab on 2026-06-18.	Reported

Advanced fission reactors
Developer
Company-reported capability or material relationship; this mapping does not imply government endorsement, qualification or a contract.
—Reported
Microreactors
Developer
Ward 250 (100 kWt HTGR test reactor) reached zero-power criticality at the Utah San Rafael Energy Lab on 2026-06-18.
PrototypeReported

Maturity and TRL describe this organization's work; the field-wide maturity is on each technology's page.

People1

All 1 people →

Isaiah Taylor · LinkedIn ↗
Co-founder

Sources15

Show all 15 sources and supporting evidence

Profile2

1
DatabaseValar Atomics - LinkedIn company profile
LinkedIn · Supports Organization · employee range
“employee_range: 11-50 (profile: 11-50 employees)”
2
CompanyThe New Atomic Age | Valar Atomics
Valar Atomics · Supports Organization · name
“The New Atomic Age | Valar Atomics”

Systems1

3
CompanyPrimary-source evidence for valar-atomics
Valar Atomics · Supports Organization technology, System, System · system input:silicon-carbide
“Our HTGR Architecture”

Technologies2

4
Government recordDepartment of Energy Celebrates Second Advanced Reactor Achieving Criticality
U.S. Department of Energy · Jun 18, 2026 · Supports Organization technology
“DOE Reactor Pilot Program participant Valar Atomics’ advanced reactor design, Ward 250, successfully completed a zero-power fueled criticality demonstration.”
5
Government recordValar Atomics | Utah San Rafael Energy Lab
Utah San Rafael Energy Lab · Supports Organization technology
“Valar’s Ward 250 microreactor utilizes robust tri-structural isotropic (TRISO) fuel particles.”

Funding9

6
DatabaseValar Atomics - Forge company profile
Forge · Oct 6, 2026 · Supports Funding round · amount, Funding round · post money valuation usd
“03/31/2026 Series B-3 $299.79M $37.67 $2B Palmer Luckey, Shyam Sankar”
7
NewsSequoia Capital leads $1B round for nuclear upstart Valar Atomics
Axios · Aug 3, 2026 · Supports Funding round · post money valuation usd
“Valar Atomics has closed a $1 billion Series B round at a $6 billion post-money valuation led by Sequoia Capital”
8
NewsSequoia Leads $1 Billion Funding Round in Nuke Startup Valar
Bloomberg · Aug 3, 2026 · Supports Funding round
“The transaction values Valar at $6 billion, including the money being invested.”
9
CompanyAnnouncing our $1B Series B Led By Sequoia
Valar Atomics · Aug 3, 2026 · Supports Funding round, Funding round · amount
“closing of a $200 million credit facility led by Erebor Bank”
10
NewsPalmer Luckey-Backed Nuclear Startup Valar Lands $2 Billion Valuation
Bloomberg · Mar 31, 2026 · Supports Funding round, Funding round · amount, Funding round · post money valuation usd
“The new valuation includes the dollars raised.”
11
NewsEl Segundo’s Valar Atomics Raises $130 Million to Scale Nuclear Fission
Los Angeles Times B2B · Dec 17, 2025 · Supports Funding round · investors
“has closed a $130 million Series A funding round, led by”
12
NewsNuclear Startup Backed by Luckey, Lockheed Director Raises $130 Million
Bloomberg · Nov 10, 2025 · Supports Funding round · amount, Funding round · announced on
“Shyam Sankar and other investors are putting $130 million into Valar Atomics”
13
NewsNuclear startup that's suing NRC raises $130 million with backing from Anduril's Palmer Luckey and senior Palantir executive
CNBC · Nov 10, 2025 · Supports Funding round, Funding round · amount
“The fundraising was led by venture capital firms Snowpoint Ventures, Day One Ventures and Dream Ventures.”
14
NewsValar Atomics comes out of stealth with $19M and a pilot reactor site
TechCrunch · Feb 20, 2025 · Supports Funding round · amount
“raised $19 million in a seed funding round to develop its first test reactor. The financing was led by Riot Ventures, with AlleyCorp, Initialized Capital, Day One Ventures, and Steel Atlas participating.”

People1

15
OtherBlack Flag 100
Black Flag · Supports Organization, Role
“Atomics is pioneering a new era in nuclear energy by developing modular High-Temperature Gas Reactors (HTGRs) to produce abundant, clean, and cost-effective”

Each fact on this page is attached to the sources that support it. Archived copies are linked when we keep one.