CleanFiber
PrivateLast Round
Series C
Oct 2, 2025
Est. Valuation
$10M
Total Funding Raised
$82.5M
Momentum
Top 25%
of companies Caplight tracks
Company Overview
CleanFiber is a manufacturing company that produces high-performance, carbon-negative cellulose insulation from recycled corrugated cardboard.
Sector
Energy & Sustainability
Verticals
Sustainable Materials, Green Building, Clean Manufacturing, Waste Management
Business Model
B2B
Customer Profile
Hardware Sales
AI Layer
Non-AI
Keywords
Historical Pricing
Historical view of private secondary pricing and transaction trends.
CleanFiber Comparables
Compare CleanFiber with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Greenfiber | 83% | |
| Fiberlite Technologies, Inc. | 82% | |
| Nu-Wool Co., Inc. | 79% |
CleanFiber Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Series C | Oct 2, 2025 | ||||
| Grant | Oct 25, 2024 | ||||
| Series B | Apr 15, 2024 | ||||
| VC Round | Jun 23, 2023 | ||||
| VC Round | May 1, 2023 | ||||
Series A Extension | Dec 8, 2022 |
Key People
Founding team and executive leadership
CleanFiber Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Ahlström Invest | Series B |
| Spring Lane Capital | Series B, Grant |
| Lapis Advisers | Debt |
| Launchpad Venture Group | VC Round |
| IFG Asset Management | VC Round, Financing, Series A |
| Global Brain Corporation | Series B |
| AXA IM Alts | Series B, Series A Extension |
Market signals
Structured signals derived from secondary market and firmographic data.
- Aug 21, 2026
Monthly visitors grew 229% MoM to 3.2K.
- Oct 2, 2025
Raised $7M in Series C funding.
CleanFiber 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.
Request accessFrequently Asked Questions
Common questions about CleanFiber's valuation, stock price, and market status.
Is CleanFiber a public or private company?
CleanFiber is a private company.
What is the current stock price of CleanFiber?
CleanFiber is a private company with no public stock price. No recent secondary market data is available.
How much is CleanFiber worth (valuation)?
Valuation information for CleanFiber is not publicly available.
Can I buy CleanFiber stock?
CleanFiber shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors. Visit https://www.caplight.com to learn more.
When was CleanFiber's last funding round?
CleanFiber's most recent funding round was Grant on October 25, 2024.
Who are the main investors in CleanFiber?
Key investors in CleanFiber include Spring Lane Capital, AXA IM Alts, 43North, Aligned Climate Capital, Department of Energy.
Will CleanFiber IPO soon?
No public IPO plans have been announced for CleanFiber.
How can I track CleanFiber secondary market activity?
Caplight tracks bids, offers, and trades for private companies. Visit https://www.caplight.com to monitor CleanFiber's secondary market activity and sign up for updates.