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Energy & Climate Companies in Washington, D.C. — 5 Startups | BuildList

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Company Directory

Energy & Climate Companies in Washington, D.C.

A curated directory of energy & climate companies headquartered in Washington, D.C., with live hiring activity and funding context.

5 companies · Updated 8/11/2026

Series C+ · Washington, DC

Builds modular nuclear plants.

$266.7M raisedFunded 8/4/2026

Seed · Washington, DC

Orchestrates AI datacenter power to flex with the grid.

$165.1M raisedFunded 7/17/2026

Overview Energy

Seed · Ashburn, VA

Delivers space-based power.

$20.0M raisedFunded 11/1/2025

Seed · McLean, VA

Chip-to-grid power delivery technology for AI data centers.

$40.2M raisedFunded 3/19/2026

Series C+ · McLean, VA

Manufactures hybrid-state batteries.

$16.7M raisedFunded 3/16/2026

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BuildList includes active companies with a canonical sector and headquarters metro. Hiring counts come from verified openings collected directly from company applicant-tracking systems.

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