Key facts
- CleanFiber’s last known valuation is $68.0M (Aug 2024).
- It has raised $136.3M across 14 recorded rounds; the latest was Early Stage VC ($6.5M) in Sep 2025.
- Notable investors include US National Science Foundation, Global Brain, U.S. Department of Energy, Keiretsu Forum, Third Derivative — 43 tracked in total.
- CleanFiber has filed 14 Form Ds with the SEC since 2018, most recently Oct 2025 ($34.0M sold to 29 investors).
- Status: Privately Held (backing).
- ·Post-money valuations for all 14 rounds
- ·The complete investor list — 43 names
- ·Watchlist + deal alerts for CleanFiber
Funding rounds
14 roundsAbout CleanFiber
Manufacturer of material intended to offer high-performance building insulation from recycled corrugated cardboard. The company's cellulose insulation can be used in attics, walls, and floors of residential or commercial new construction, enabling construction companies to construct fire-resistant buildings and deliver the product at a cost-competitive price.
- Sector
- Business Products and Services (B2B)
- HQ
- Blasdell, NY, United States
- Founded
- 2013
- Employees
- 95
- Website
- cleanfiber.com/
- Ownership
- Privately Held (backing)
CleanFiber doesn't have a composite mark yet — a PA Mark is published once enough pricing inputs exist (trade prints, fund marks, round prices). The rest of the record below builds toward it.
Recorded secondary trades
No secondary trades in CleanFiber shares have been recorded yet. When a print lands — third-party, direct report, or platform — it appears here with structure, source, and price.
Institutional fund marks
No SEC-registered fund has reported a fair-value mark on CleanFiber in its N-PORT filings yet. We sweep new filings monthly.