CleanFiber key facts
as of Oct 2026- Manufacturer of material intended to offer high-performance building insulation from recycled corrugated cardboard.
- CleanFiber is valued at approximately $68.0M as of Oct 2026 (last reported valuation).
- 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).
CleanFiber's last reported valuation, Aug 2024. Nothing priced has surfaced since.
- ·The complete investor list: 43 names
- ·Watch CleanFiber: the Monday email on marks, rounds and moves
CleanFiber funding rounds
14 roundsWho backs CleanFiber
43+CleanFiber valuation
CleanFiber's last reported valuation was $68 million in Aug 2024. No priced round, secondary trade or fund mark has surfaced since.
How much has CleanFiber raised?
CleanFiber has raised $136 million across 14 recorded rounds since 2018. The largest was a $7.3 million early-stage round in Aug 2022; the most recent was a $6.5 million early-stage round in Sep 2025.
CleanFiber has filed 14 Form Ds with the SEC since 2018, most recently in Oct 2025 ($34 million sold to 29 investors).
CleanFiber investors
43 investors are on record for CleanFiber, including US National Science Foundation, Global Brain, U.S. Department of Energy and Keiretsu Forum. The early-stage round in Sep 2025 drew 4 investors.
About 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)
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