Proof Energy
PrivateLast Round
Accelerator
Mar 5, 2026
Est. Valuation
$54.15M
Total Funding Raised
$16M
Momentum
Top 25%
of companies Caplight tracks
Company Overview
Proof Energy operates in Energy & Sustainability and is based in Fremont, California. Its latest recorded funding round was an Accelerator round in March 2026.
Proof Energy is a clean energy technology company that develops metallic solid oxide fuel cell systems and catalytic oxidation heaters to decarbonize commercial transportation and power grids.
Sector
Energy & Sustainability
Verticals
Alternative Fuels, Clean Transportation, Electric Vehicles, Energy Storage
Business Model
B2B
Customer Profile
Hardware Sales
AI Layer
Non-AI
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Proof Energy Comparables
Compare Proof Energy with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Petra Power | 84% | |
| Adelan | 78% | |
| Bloom Energy | 77% |
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Proof Energy Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Accelerator | Mar 5, 2026 | ||||
| Series B Extension | Jan 31, 2023 | ||||
| Series B | Jul 11, 2022 | ||||
| Accelerator | Apr 22, 2021 | ||||
| Accelerator | Oct 23, 2020 |
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Proof Energy Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Plug and Play Tech Center | Accelerator |
| Halliburton Labs | Accelerator |
| Cleantech Open | Accelerator |
Market signals
Structured signals derived from secondary market and firmographic data.
- Mar 5, 2026
Received funding from Halliburton Labs.
- Mar 5, 2026
Launched the ClearTherm Range Defender, a zero-emissions catalytic oxidation heater.
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Proof Energy Filings
Explore SEC and related filing metadata, where available.
| Type | Date | Amount Offered | Amount Sold | Filing | Pages | Download |
|---|
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Frequently Asked Questions
Common questions about Proof Energy's valuation, stock price, and market status.
Is Proof Energy a public or private company?
Proof Energy is a private company.
What is the current stock price of Proof Energy?
Proof Energy is a private company, so its shares have no public market price. Caplight tracks Proof Energy's secondary market activity and provides MarketPrice™ estimates of its share price to Caplight users.
How much is Proof Energy worth (valuation)?
Proof Energy's valuation is estimated at $54.1M based on funding round data.
Can I buy Proof Energy stock?
Proof Energy shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors.
When was Proof Energy's last funding round?
Proof Energy's most recent funding round was Accelerator on March 5, 2026.
Who are the main investors in Proof Energy?
Key investors in Proof Energy include Plug and Play Tech Center, Halliburton Labs, Cleantech Open.
Will Proof Energy IPO soon?
No public IPO plans have been announced for Proof Energy.
How can I track Proof Energy secondary market activity?
Caplight tracks bids, offers, and trades in Proof Energy's shares on secondary markets.