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 Sep 2026

Series C+ · Washington, DC

Builds modular nuclear plants.

$266.7M raisedFunded Aug 2026

Series A · Washington, DC

Orchestrates AI datacenter power to flex with the grid.

$315.1M raisedFunded Aug 2026

Overview Energy

Seed · Ashburn, VA

Delivers space-based power.

$20.0M raisedFunded Oct 2025

Seed · McLean, VA

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

$40.2M raisedFunded Mar 2026

Series C+ · McLean, VA

Manufactures hybrid-state batteries.

$16.7M raisedFunded Mar 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.

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Energy & Climate jobs in Washington, D.C.All Energy & Climate jobs Company directories