Company
CleanFiber
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Also known as Clean Fiber, CleanFiber Inc
- Status
- Operatingas of 2026-09-18
- Business model
- B2B
- Headquarters
- Buffalo, NY, United States
- Customers
- quality installers
- Legal name
- CleanFiber Inc
Claim, correct or request removal
Record updated 19 October 2026
About
CleanFiber is a pioneering materials science company focused on decarbononizing buildings. We make high performance building insulation products from recycled corrugated cardboard boxes. Our carbon negative insulation provides improved energy efficiency on an affordable basis. We are deeply committed to advancing our nation’s economy while also helping our nation achieve other societal and environmental goals.
Funding snapshot
- Total raised
- $110MSEC form D sum, as of 2026-09-28Source (opens in a new tab)
- Latest round
- Undisclosed, $4.5M2026-06-22
Funding rounds
- Round, 2026
- $4.5M2026-06-22, SEC form D sold
- Round, 2025
- $6.5M2025-09-19, SEC form D sold, 4 investors
- Round, 2025
- $34M2025-09-17, SEC form D sold, 29 investors
- Round, 2024
- $28.2M2024-03-28, SEC form D sold, 188 investors
- Series B
- $28M2024, Company stated
- Round, 2023
- $4.3M2023-09-30, SEC form D sold, 111 investors
- Round, 2023
- $1.7M2023-04-28, SEC form D sold, 57 investors
- Round, 2022
- $7.3M2022-08-08, SEC form D sold, 86 investors
- Round, 2021
- $5.8M2021-09-10, SEC form D sold, 46 investors
- Round, 2021
- $6.1M2021-07-16, SEC form D sold, 96 investors
- Round, 2020
- $2.3M2020-10-21, SEC form D sold, 73 investors
- Round, 2020
- $2.9M2020-03-13, SEC form D sold, 72 investors
- Round, 2019
- $2.6M2019-06-24, SEC form D sold, 74 investors
- Round, 2019
- $600K2019-01-28, SEC form D sold, 4 investors
- Round, 2018
- $1.7M2018-09-26, SEC form D sold, 34 investors
- More rounds
- 7 earlier rounds recorded
Products
- Other
- CleanFiber cellulose insulation
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