Green Steel Environmental
PrivateLast Round
Seed
Aug 7, 2025
Est. Valuation
$7.5M
Total Funding Raised
$3.18M
Company Overview
Green Steel Environmental operates in Energy & Sustainability and is based in Boulder, Colorado. Its latest recorded funding round was a Seed round in August 2025.
Green Steel Environmental is a cleantech company that provides an upcycled, chemical-free additive for wastewater and biogas treatment to remove phosphorus and sulfur.
Sector
Energy & Sustainability
Verticals
Water Treatment, Circular Economy, Waste Management
Business Model
B2B
Customer Profile
Hardware Sales
AI Layer
Non-AI
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Green Steel Environmental Comparables
Compare Green Steel Environmental with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| FerroBio Group | 78% | |
| Calpech, S.L. | 74% | |
| Q2 Technologies | 73% |
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Green Steel Environmental Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Seed | Aug 7, 2025 | ||||
| Accelerator | Mar 12, 2025 | ||||
| Seed | Jul 18, 2024 | ||||
| Grant | May 16, 2024 | ||||
| Grant | Nov 13, 2023 |
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Key People
Founding team and executive leadership
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Green Steel Environmental Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Venture Partners at CU Boulder | Grant |
| Central Texas Angel Network | Seed |
| Rockies Venture Club | Seed |
| Colorado Office of Economic Development and International Trade | Grant |
| Cowtown Angels | Seed |
Market signals
Structured signals derived from secondary market and firmographic data.
- Aug 7, 2025
$1.7M round led by Central Texas Angel Network
- May 16, 2024
$250K grant from Colorado Office of Economic Development and International Trade.
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Recent news
Latest coverage and updates
- receives_financingSep 28, 2026
In Jan '26, Green Steel Environmental receives a $2.2M Seed round led by Rockies Venture Club, Central Texas Angel Network, Cowtown Angels, and Baylor Angel Network.
- attends_eventSep 28, 2026
Green Steel Environmental announced it will showcase performance data from its first full-scale pilot at WEFTEC 2026, held Sep 28th–30th '26 in Louisiana.
- recognized_asSep 28, 2026
Green Steel Environmental is named a SXSW Pitch 2026 finalist in the Sustainability, AgTech & Food category.
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Green Steel Environmental 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 Green Steel Environmental's valuation, stock price, and market status.
Is Green Steel Environmental a public or private company?
Green Steel Environmental is a private company.
What is the current stock price of Green Steel Environmental?
Green Steel Environmental is a private company, so its shares have no public market price. Caplight tracks Green Steel Environmental's secondary market activity and provides MarketPrice™ estimates of its share price to Caplight users.
How much is Green Steel Environmental worth (valuation)?
Green Steel Environmental's valuation is estimated at $7.5M based on funding round data.
Can I buy Green Steel Environmental stock?
Green Steel Environmental shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors.
When was Green Steel Environmental's last funding round?
Green Steel Environmental's most recent funding round was Seed on August 7, 2025.
Who are the main investors in Green Steel Environmental?
Key investors in Green Steel Environmental include Central Texas Angel Network, Rockies Venture Club.
Will Green Steel Environmental IPO soon?
No public IPO plans have been announced for Green Steel Environmental.
How can I track Green Steel Environmental secondary market activity?
Caplight tracks bids, offers, and trades in Green Steel Environmental's shares on secondary markets.