Registered entities
BRIMSTONE LLC
Reg. No. 831946344United States
Brimstone Energy, Inc
Reg. No. 371930983United States
Social engagement
Social engagement: 15.1K social following, 6 posts in the last 12 months — around the industry typical range.
Investor mix
19 investors on record; lead investors include DCVC, Breakthrough Energy.
| Investor type | Count | Share |
|---|---|---|
| Venture capital | 12 | 63% |
| Private equity | 2 | 11% |
| Other / undisclosed | 5 | 26% |
Hiring activity
Hires occasionally
1 role tracked across 1 of the last 12 months
2 Mar 2026 · R&D Metallurgical Engineer · Oakland
Based on job postings tracked across public sources.
Recent activity
24 Jun 2026
Milestone
regulatory
11 Jun 2026
Event
Reindustrialize 3.0