50 Best Fossil Fuels Companies to Watch in 2026

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.

118
Total Companies
$8.3B
Total Funding
$70.7M
Avg Funding
Houston
Top Location
# 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