CleanFiber

Blasdell, NY · Founded 2013 · Privately Held (backing)

Manufacturer of material intended to offer high-performance building insulation from recycled corrugated cardboard. CleanFiber is based in Blasdell, NY and was founded in 2013. Its last reported valuation was $68 million in Aug 2024. It has raised $136 million across 14 recorded rounds; the latest was a $6.5 million early-stage round in Sep 2025.

Last reported valuation
$68.0M
Oct 2026
Priced at
—
Total raised
$136.3M
Last round
Early Stage VC
Sep 2025
What is CleanFiber worth?
$68.0Mlast reported valuation · Oct 2026

CleanFiber's last reported valuation, Aug 2024. Nothing priced has surfaced since.

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Valuation timeline

0 priced rounds · 32 daily marks since · Sep 2026 – Oct 2026
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Markrounds hold their value until the next priced eventMark, today
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CleanFiber funding history

14 rounds
DateRoundRaisedPost-money
Sep 2025Early Stage VC$6.5M▮
Sep 2025Early Stage VC$34.0M▮
Mar 2024Early Stage VC$28.2M▮
Sep 2023Debt$4.3M▮
Apr 2023Seed Round$1.7M▮
Aug 2022Early Stage VC$7.3M▮
+ 8 earlier rounds · a free account shows the full history
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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).

How CleanFiber's valuation is determined

Private company valuations aren’t quoted on an exchange — they’re established in moments: a priced funding round sets a post-money valuation, secondary trades print at a price per share, and SEC-registered funds holding the stock report fair-value marks in their N-PORT filings.

For CleanFiber, the most current credible signal sets the number and the older ones confirm it: a live secondary-market price first, then three or more recent prints, then institutional fund marks, and otherwise the last priced round, which never decays. The valuation is the last round’s post-money moved by the price change since that round, so no share count is assumed. Today it is set by last reported valuation. Question about this number? Full methodology →

Frequently asked about CleanFiber

What is CleanFiber worth?
CleanFiber is valued at $68.0M as of Oct 2026. CleanFiber's last reported valuation, Aug 2024. Nothing priced has surfaced since.
How much has CleanFiber raised?
CleanFiber has raised $136.3M in total funding across 14 recorded rounds.
When did CleanFiber last raise?
CleanFiber last raised in Sep 2025 (Early Stage VC), raising $6.5M.