Deploys portable nuclear reactors.
$587.1M raisedFunded 12/17/2025
General Matter
81 jobsSeries A · Los Angeles, CA
Restoring US leadership in nuclear fuel enrichment to power AI, manufacturing, and critical industries.
$50M raisedFunded 4/14/2025
Valar Atomics
59 jobsSeries B · El Segundo, CA
Builds nuclear reactors for industry.
$600.7M raisedFunded 3/31/2026
Deploys kilowatt-scale fission reactors.
$607.9M raisedFunded 7/28/2026
Seeds clouds with drones.
$46.3M raisedFunded 5/5/2025
Arbor Energy
16 jobsSeries A · El Segundo, CA
Generates energy while storing carbon.
$68.5M raisedFunded 10/21/2025
Vital Lyfe
13 jobsSeed · Torrance, CA
Builds portable systems that turn natural water sources into drinking water.
$24.1M raisedFunded 12/16/2025
Critical Energy
6 jobsSeed · Hawthorne, CA
Generates clean power from geothermal heat.
$18.2M raisedFunded 6/17/2026
Produces affordable green hydrogen.
$7M raisedFunded 9/17/2024
Critical Loop
5 jobsSeries A · Long Beach, CA
Deploys faster power than utilities alone.
$42.2M raisedFunded 4/13/2026
Automates mineral exploration drilling.
$3.5M raisedFunded 4/23/2025
Terraform Industries
Seed · Burbank, CA
Produces carbon-negative natural gas.
$63.7M raisedFunded 4/13/2026
Western Chemicals
Seed · El Segundo, CA
Turning wastewater into the world's cheapest fuels.
$175K raisedFunded 4/15/2026
How this list is built
BuildList includes active companies with a canonical sector and headquarters metro. Hiring counts come from verified openings collected directly from company applicant-tracking systems.