Mantel
PrivateLast Round
Strategic
Aug 24, 2026
Total Funding Raised
$50M
Momentum
Top 5%
of companies Caplight tracks
Company Overview
Mantel operates in Energy & Sustainability and is based in Cambridge, Massachusetts. Its latest recorded funding round was a Strategic round in August 2026.
Mantel is a carbon capture technology company that develops high-temperature, molten-salt based carbon capture systems for industrial applications such as steel, cement, and chemical manufacturing.
Sector
Energy & Sustainability
Verticals
Carbon Capture, Clean Manufacturing
Business Model
B2B
Customer Profile
Hardware Sales, Services & Consulting
AI Layer
Non-AI
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Mantel Comparables
Compare Mantel with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Verdox | 84% | |
| Mitico | 81% | |
| Cool Planet Technologies | 80% |
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Mantel Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Strategic | Aug 24, 2026 | ||||
| Series A | Sep 5, 2024 | ||||
| Early Funding | Dec 20, 2023 | ||||
| Seed | Aug 23, 2022 |
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Key People
Founding team and executive leadership
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Mantel Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Hartree Partners | Strategic, Series A |
| Engine Ventures | Strategic, Series A, Seed |
| Constellation Technology Ventures | Strategic |
| Azimut | Strategic |
| Azimut Investments | Strategic |
| Arosa Capital Management | Series A |
| My Climate Journey Collective | Strategic, Series A |
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Market signals
Structured signals derived from secondary market and firmographic data.
- Aug 24, 2026
Raised $18M led by Azimut Holding and Constellation Technology Ventures
- Aug 21, 2026
Monthly visitors increased 275% MoM, reaching 5.1K.
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Recent news
Latest coverage and updates
- receives_financingAug 25, 2026
On Aug 24th '26, Mantel Capture, Inc. receives $18M in Series A1 financing from Constellation Technology Ventures and Azimut Investments, with existing investors also participating, to advance its carbon-capture system into commercial projects across power generation, oil and gas, and pulp and paper.
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Mantel Filings
Explore SEC and related filing metadata, where available.
| Type | Date | Amount Offered | Amount Sold | Filing | Pages | Download |
|---|
Filing documents are not displayed on this public page. Request access to learn about available coverage.
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Frequently Asked Questions
Common questions about Mantel's valuation, stock price, and market status.
Is Mantel a public or private company?
Mantel is a private company.
What is the current stock price of Mantel?
Mantel is a private company, so its shares have no public market price. Caplight tracks Mantel's secondary market activity and provides MarketPrice™ estimates of its share price to Caplight users.
How much is Mantel worth (valuation)?
Valuation information for Mantel is not publicly available.
Can I buy Mantel stock?
Mantel shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors.
When was Mantel's last funding round?
Mantel's most recent funding round was Strategic on August 24, 2026.
Who are the main investors in Mantel?
Key investors in Mantel include Engine Ventures, Constellation Technology Ventures, Azimut Investments, Shell Ventures, Engine Ventures.
Will Mantel IPO soon?
No public IPO plans have been announced for Mantel.
How can I track Mantel secondary market activity?
Caplight tracks bids, offers, and trades in Mantel's shares on secondary markets.