CleanFiber# Climate Tech# North America
cleanfiber.com
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Overview
News
Salaries
Products
People
Growth
Offices
Financials
Funding and backers
Total raised
$100.1M
19 rounds on record
Latest round
$4.5M
Convertible Note · Jun 2026 · 3 mo ago
Team
51-200
employees, estimated range
Grants
$350k
2 grants · CORDIS
Backers
6
43North, Aligned Climate Capital
The money's age
Fresh money
3 months since the last round · not hiring
Momentum
20/100
fresh money
Last sign of life
this month
a posting or a news item
The story so fareach stage dated by its source: the company's releases, the press, registers, filings
Jul 15
New executive Erik Gregory, Executive Officer · SEC Form D
Jun 22
Raised a round Convertible Note $4.5M · SEC Form D
Sep 19, 2025
Raised a round Venture round $6.5M · SEC Form D
Sep 17, 2025
Raised a round Venture round $34M · SEC Form D
Jul 22, 2024
Won a grant $200k · CORDIS
Mar 28, 2024
Raised a round Venture round $28.2M · SEC Form D
Sep 30, 2023
Took on debt financing $4.3M · SEC Form D
Apr 28, 2023
Raised a round Venture round $1.7M · SEC Form D
Aug 8, 2022
Raised a round Venture round $7.3M · SEC Form D
Jul 16, 2021
Raised a round Venture round $6.1M · SEC Form D
Oct 21, 2020
Raised a round Venture round $2.3M · SEC Form D
Mar 13, 2020
Raised a round Venture round $2.9M · SEC Form D
Jun 24, 2019
Raised a round Venture round $2.6M · SEC Form D
Jan 28, 2019
Raised a round Venture round $600k · SEC Form D
Sep 26, 2018
Took on debt financing $3.2M · SEC Form D
Sep 26, 2018
Raised a round Venture round $1.7M · SEC Form D
Mar 12, 2018
Raised a round Venture round $1.6M · SEC Form D
Dec 5, 2017
Took on debt financing $870k · SEC Form D
Nov 18, 2016
Took on debt financing $20k · SEC Form D
Jan 1, 2016
Won a grant $150k · CORDIS
2013
Founded
Tractionpublic signals, read monthly
Web presence
top 6%
of 133.2M domains by links, Common Crawl
Funding rounds
| Round | Date | Amount | Investors | Source |
|---|---|---|---|---|
| Convertible Note | Jun 2026 | $4.5M | — | SEC Form D |
| Venture round | Sep 2025 | $6.5M | — | SEC Form D |
| Venture round | Sep 2025 | $34M | — | SEC Form D |
| Grant | Jul 2024 | $200k | — | CORDIS |
| Venture round | Mar 2024 | $28.2M | — | SEC Form D |
| Debt Financing | Sep 2023 | $4.3M | — | SEC Form D |
| Venture round | Apr 2023 | $1.7M | — | SEC Form D |
| Venture round | Aug 2022 | $7.3M | — | SEC Form D |
| Venture round | Jul 2021 | $6.1M | — | SEC Form D |
| Venture round | Oct 2020 | $2.3M | — | SEC Form D |
| Venture round | Mar 2020 | $2.9M | — | SEC Form D |
| Venture round | Jun 2019 | $2.6M | — | SEC Form D |
| Venture round | Jan 2019 | $600k | — | SEC Form D |
| Debt Financing | Sep 2018 | $3.2M | — | SEC Form D |
| Venture round | Sep 2018 | $1.7M | — | SEC Form D |
| Venture round | Mar 2018 | $1.6M | — | SEC Form D |
| Debt Financing | Dec 2017 | $870k | — | SEC Form D |
| Debt Financing | Nov 2016 | $20k | — | SEC Form D |
| Grant | Jan 2016 | $150k | — | CORDIS |
Registers and programsofficial lists and records that name the company
| Legal entity | CleanFiber, LLC | SEC Form D |
Founders and leadersfrom filings, registers and the company's site
Jonathan StrimlingExecutive Officer, DirectorSEC Form D
Curt FischerExecutive OfficerSEC Form D
Curtis FischerExecutive OfficerSEC Form D
Kevin ChristnerExecutive OfficerSEC Form D
Donald SimoneauExecutive OfficerSEC Form D
Sami RahmanExecutive Officer, DirectorSEC Form D
Backed byfrom the funds' portfolios and accelerator catalogs
43North 
Aligned Climate Capital 
Boston Harbor Angels 
CEVG 
Global Brain 
Walnut Venture Associates Investors in similar startupsfunds that back the companies most like this one
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Overview
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News
NH Tech Alliance announced Jonathan Strimling, CEO of CleanFiber as the 2024 Entrepreneur of the Year
Manchester, NH, September 17, 2024 - The NH Tech Alliance is proud to announce that Jonathan Strimling, CEO of CleanFiber, is the recipient of the 2024
Read more
Report
The 'valley of death' for climate lies between early-stage funding and scaling up
It's easier for climate companies to get enough funding to get started. It's much harder once they need money to scale.
Read more
Report
CleanFiber wants to turn millions of tons of cardboard boxes into insulation
The startup has raised $28 million to help fund a nationwide expansion of its cardboard-based cellulose building insulation.
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Report
People
Jonathan Strimling
Executive Officer, Director
Curt Fischer
Executive Officer
Curtis Fischer
Executive Officer
Kevin Christner
Executive Officer
Donald Simoneau
Executive Officer
Sami Rahman
Executive Officer, Director
Daniel Thompson
Director
James Austin
Executive Officer
Marco Peterson
Executive Officer, Director
Erik Gregory
Executive Officer
Schuyler Lance
Director
Mark Bernfield
Director
Names and roles come from public filings, company registers and the company's own site. Is this you? Correct or remove · How we handle this data
Offices
Where the company hires and what each office is for
Cities
1
Hiring now
0
Countries
1
Buffalo
United States
HQ
50-200 est. staff
Financials
Total raised
$108.7M
Latest round
Convertible Note
Funding rounds
19
Funding rounds
| Round | Announced | Amount | |
|---|---|---|---|
| Convertible Note | 2026 | $4.5M | Details |
| Venture - Series Unknown | 2025 | $6.5M | Details |
| Venture - Series Unknown | 2025 | $34M | Details |
| Grant | 2024 | $200k | Details |
| Venture - Series Unknown | 2024 | $28.2M | Details |
| Debt Financing | 2023 | $4.3M | Details |
| Venture - Series Unknown | 2023 | $1.7M | Details |
| Venture - Series Unknown | 2022 | $7.3M | Details |
| Venture - Series Unknown | 2021 | $6.1M | Details |
| Venture - Series Unknown | 2020 | $2.3M | Details |
| Venture - Series Unknown | 2020 | $2.9M | Details |
| Venture - Series Unknown | 2019 | $2.6M | Details |
| Venture - Series Unknown | 2019 | $600k | Details |
| Debt Financing | 2018 | $3.2M | Details |
| Venture - Series Unknown | 2018 | $1.7M | Details |
| Venture - Series Unknown | 2018 | $1.6M | Details |
| Debt Financing | 2017 | $870k | Details |
| Debt Financing | 2016 | $20k | Details |
| Grant | 2016 | $150k | Details |