The most prominent fossil fuels companies ranked by global prominence, funding activity, and market position. Showing the top 50 out of 118 companies tracked on Fsome.
| # | Company | Location | Employees | Total Funding | Last Round | Last Funded |
|---|---|---|---|---|---|---|
| 1 |
Hydrostor
Hydrostor develops and operates long-duration energy storage systems to replace …
|
Toronto | 51 - 100 | $2.3B | Corporate Round | 2026-02-25 |
| 2 |
Gevo
Gevo focuses on the production of isobutanol, thereby bringing renewable and cos…
|
Englewood | 101 - 250 | $2.1B | Post Ipo Debt | 2025-07-10 |
| 3 |
atmio
The operating system for the oil & gas sector to effortlessly find, fix, and rep…
|
Hamburg | 1 - 10 | $6.9M | Seed | 2024-06-20 |
| 4 |
Summit Carbon Solutions
Summit Carbon Solutions a new business platform that will address the global cha…
|
Alden | 51 - 100 | $650.0M | Private Equity | 2022-05-11 |
| 5 |
Electrified Thermal Solutions
Electrified Thermal Solutions replace fossil fuels with renewable heat in every …
|
Medford | 11 - 50 | $24.3M | Series Unknown | 2025-09-04 |
| 6 |
Dig Energy
Dig Energy produces purpose-built drilling technology to create highly efficient…
|
Manchester | 1 - 10 | $5.0M | Seed | 2025-09-09 |
| 7 |
BW Energy
BW Energy is a growth-focused oil and gas company involved in the acquisition, d…
|
Oslo | 251 - 500 | $750.0M | Post Ipo Debt | 2025-08-08 |
| 8 |
Vaquero Midstream
Vaquero Midstream offers oil and gas producers a full suite of midstream solutio…
|
Dallas | 11 - 50 | $400.0M | Debt Financing | 2025-04-15 |
| 9 |
Aemetis Biogas
Aemetis Biogas is a subsidiary of Aemetis.
|
Cupertino | 101 - 250 | $79.1M | Debt Financing | 2023-08-30 |
| 10 |
Intelline
Intelline offers the dependable and safe power production you expect from diesel…
|
Kitchener | 1 - 10 | $203K | Seed | 2020-08-25 |
| 11 |
Touchstone Exploration
Touchstone Exploration is an upstream oil and gas company focused on exploration…
|
Calgary | 51 - 100 | $162.4M | Post Ipo Equity | 2025-10-24 |
| 12 |
Fermenstation
Fermenstation is a consulting firm that unites biomass and creative businesses.
|
Sumida | 11 - 50 | $3.4M | Series Unknown | 2024-01-30 |
| 13 |
Citron Energy
Citron Energy converts non-recyclable and non-organic waste into a usable energy…
|
New York | 1 - 10 | $1.5M | Seed | 2023-09-25 |
| 14 |
Carbonext
Carbonext helps in the commercialization of graphene products by producing cost …
|
Tulsa | 1 - 10 | $145K | Grant | 2025-02-25 |
| 15 |
BindEthics
BindEthics offers a sustainable, non-toxic glue not created from fossil fuels.
|
Manchester | 1 - 10 | $525K | Angel | 2024-11-13 |
| 16 |
VALOREM
VALOREM is a producer of renewable energies that are alternatives to sustainable…
|
Bègles | 51 - 100 | $237.6M | Debt Financing | 2022-02-07 |
| 17 |
Astra Innovations
Astra Innovations is a developer of next-generation tools for the energy sector.
|
Houston | 1 - 10 | $500K | Pre Seed | 2020-01-20 |
| 18 |
JJC Hire
JJC Hire provide waste management services for a wide range of clients.
|
Barrow In Furness | 11 - 50 | $1.0M | Debt Financing | 2024-02-20 |
| 19 |
BKB Floral Foam
BKB is working towards a renewable and compostable future for the floral and hor…
|
Minneapolis | 1 - 10 | $50K | Grant | 2022-10-13 |
| 20 |
Iron and Earth
Iron & Earth The fossil fuel industry and indigenous workers are collaborating t…
|
Edmonton | 11 - 50 | $20K | Grant | 2024-12-09 |
| 21 |
Limelight Steel
Zero emissions steel manufacturing
|
Oakland, United States | 1 - 10 | — | Pre Seed | 2021-12-06 |
| 22 |
Transition Town Kinsale
Transition Town Kinsale is a pioneering volunteer community that emphasizes tran…
|
Kinsale | 11 - 50 | $93K | Grant | 2025-01-03 |
| 23 |
Aben Resources
Aben Resources is an exploration company that advances in projects in Canadian g…
|
Vancouver | 11 - 50 | $4.2M | Post Ipo Equity | 2025-01-20 |
| 24 |
Virent Energy Systems
Virent Energy Systems is an energy technology company providing solutions that f…
|
Madison | 51 - 100 | $74.9M | Series Unknown | 2015-09-15 |
| 25 |
Kelvin Thermal Energy
Kelvin Thermal Energy is a heat provider for large buildings and industries.
|
Toronto | 1 - 10 | — | Non Equity Assistance | 2016-04-01 |
| 26 |
Powerspan
Powerspan develops a proprietary, multi-pollutant control and carbon dioxide cap…
|
Portsmouth, United States | 51 - 100 | $115.7M | Series D | 2008-06-20 |
| 27 |
StepOne Tech
StepOne Tech is a cleantech company that commercializes technology that can be u…
|
Pirkkala, Finland | 1 - 10 | — | Seed | 2020-03-05 |
| 28 |
PolyFuel
PolyFuel has develops improved membranes and systems for resolving the power gap…
|
Mountain View, United States | 1 - 10 | $37.8M | Grant | 2009-08-13 |
| 29 |
Colabitoil Sweden AB
Colabitoil Sweden is a green tech company known for its method of hydrogenation…
|
Norrsundet, Sweden | 51 - 100 | — | Seed | 2014-01-01 |
| 30 |
Green Gas International
Green Gas International converts methane emissions from coal mines and landfill …
|
Amsterdam | 251 - 500 | $780K | Series Unknown | 2008-05-31 |
| 31 |
CPS Biofuels
CPS Biofuels is a biotech company that develops alternative fuel and fuel additi…
|
Raleigh | — | — | Grant | 2007-01-01 |
| 32 |
H
HVACTES
The solar energy storage solution capable of delivering on demand carbon neutral…
|
Melbourne | 11 - 50 | — | Pre Seed | 2021-08-05 |
| 33 |
Geofuels
Geofuels provides geologic description and interpretation services to energy com…
|
— | — | — | Series Unknown | 2011-02-01 |