United States · 
Who invested in CleanFiber?
CleanFiber's investors include National Science Foundation, Global Brain Corporation and Climate Capital.
United States · Funded startup
Who invested in CleanFiber
Funding summaryUpdated 26 Oct 2026
$4.5Mraised across 1 round since 2026, from 1 source
- Latest round
- Round, $4.5MJul 2026
- Investors
- 3
The rounds
- Jul 2026Round$4.5M
Source recordedSEC filing: $4.5M sold
Founders and team
From CleanFiber's own website: 6 on the team.
- Sami RahmanCEO
- Erik GregoryChief Financial Officer
- Alexandre Martin-MinDirector
- Nate Lowbeer-LewisChairman
- Noah LernerDirector
- Paul AtkinsonDirector
Everyone who backed them
Missing a round, or an investor who was in one? Tell us.
Also claim to have backed them
These 4 firms list CleanFiber as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.
Quick answers about CleanFiber
How much has CleanFiber raised?
CleanFiber has raised $4.5M across 1 round since 2026.
When did CleanFiber last raise?
CleanFiber's most recent round was an Undisclosed round of $4.5M in Jul 2026.
What was CleanFiber's biggest round?
Its most recent round, $4.5M in Jul 2026, is also its largest on record.
Who backed CleanFiber first?
CleanFiber's first round on record, in Jul 2026, was backed by National Science Foundation, Global Brain Corporation and Climate Capital.
What stage is CleanFiber at?
CleanFiber's latest named round is an Undisclosed round, in Jul 2026.
Where is CleanFiber based?
CleanFiber is based in the United States.
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