Ranked by the ClimateTicker Green Score — who genuinely helps, and who to watch.
Carbon Removal · Zurich, Switzerland
Swiss pioneer of direct air capture (DAC), removing CO₂ from the atmosphere and storing it permanently underground, including the Orca and Mammoth plants in Iceland.
Solar · San Francisco, CA, USA· RUN
Largest residential solar, battery storage and energy-services company in the United States, offering home solar through subscription and ownership models.
Energy · London, UK
UK-based clean energy retailer and technology group whose Kraken platform manages renewable supply, smart tariffs and grid flexibility for millions of customers worldwide.
Advanced Materials · San Jose, CA, USA
Advanced materials company commercialising lithium-sulfur batteries and 3D graphene applications that promise lighter, cheaper energy storage with a lower carbon footprint.
Nature & Carbon Markets · San Francisco, CA, USA
Uses satellite data and machine learning to verify and monitor forest carbon projects, bringing transparency and quality to nature-based carbon markets.
Energy · Devens, MA, USA
MIT spin-out building compact tokamak fusion reactors using high-temperature superconducting magnets, targeting commercial fusion power with its SPARC and ARC machines.
Food & Agriculture · El Segundo, CA, USA· BYND
Plant-based meat producer whose products aim to cut the land, water and emissions footprint of animal agriculture while matching the taste of conventional meat.
Power Generation · Selby, UK· DRX
UK power generator that converted its coal plant to burn wood-pellet biomass, which it markets as renewable and 'carbon negative' — a claim widely contested by scientists and journalists.
Oil & Gas · Spring, TX, USA· XOM
One of the world's largest publicly traded oil and gas companies, with growing upstream production alongside a comparatively small low-carbon solutions division.
Aviation · Dublin, Ireland· RYAAY
Europe's largest low-cost airline by passenger numbers, which has marketed itself as a low-emissions carrier despite being one of the continent's biggest single CO₂ emitters.
Integrated utility · Rome, Italy· ENEL
Italy's largest power utility and one of the world's biggest integrated operators, with 16.9 GW renewable capacity in Italy alongside 11.3 GW of thermal; committed to phasing out fossil gas by 2040.
Green Infrastructure Fund · London, UK· FSG
London-listed infrastructure and private equity investment manager with a large renewable energy portfolio spanning solar, wind, battery storage, and bioenergy assets across Europe and beyond.
Grid / smart-grid & metering technology · Liberty Lake, Washington, USA· ITRI
Itron delivers smart meters, network infrastructure, and grid-edge analytics that enable utilities to optimise energy delivery, reduce losses, and integrate distributed renewable energy resources.
Onshore wind · London, UK
UK-based renewable energy investment and development platform focused on onshore wind, solar, and battery storage projects in Britain and internationally.
Electricity transmission / grid infrastructure · London, United Kingdom· NG.
Operates the UK's high-voltage electricity transmission network and US electricity and gas distribution businesses.
Electricity generation / networks · Perth, Scotland, United Kingdom· SSE
UK-based energy company with a large renewables portfolio (onshore/offshore wind, hydro) and electricity networks; one of the UK's leading clean-energy investors.
Reinsurer · Zurich, Switzerland· SREN
One of the world's two largest reinsurers, a pioneer in climate-risk modelling and parametric insurance products, and committed to ceasing coverage of new oil-sands and coal projects.
Integrated utility · Solna, Sweden
Swedish state-owned utility with a largely fossil-free generation mix (hydro, nuclear and wind); planning small modular reactor (SMR) expansion.
Grid / smart-grid & VPP software · London, UK
Kraken Technologies — an Octopus Energy Group subsidiary — provides a cloud-native energy retail and grid flexibility operating system licensed to utilities worldwide, enabling demand response, smart tariffs, and distributed energy resource management at scale.
Heat pumps · Remscheid, Germany
German heating manufacturer pivoting aggressively to heat pumps — opened a dedicated heat pump mega-factory in 2024 — but continues to produce gas boilers alongside its growing heat pump range.
Hydrogen fuel cells · Horsham, UK· CWR
UK developer of proprietary solid oxide cell technology licensed to global manufacturers for both distributed power generation and green hydrogen electrolysis.
Energy storage · Westlake Village, CA, US· NRGV
Develops gravity-based and battery energy storage systems alongside an energy management software platform for utilities, IPPs, and industrial and data-centre clients.
Grid / equipment & technology · Munich, Germany· ENR
Siemens Energy — spun off from Siemens AG in 2020 — provides high-voltage grid technologies, power transformers, HVDC systems, and energy management software essential for transmission infrastructure serving renewable generation.
Sustainable aviation fuel · Amsterdam, Netherlands
Dutch SAF supply and production company co-founded by KLM that supplied the world's first commercial SAF flight in 2011 and is developing production facilities across the Netherlands, Sweden, and the US.
Solar · London, UK
UK-headquartered solar energy developer and operator with a global portfolio of utility-scale solar and storage projects, majority-owned by bp.
Solar · Singapore
Singapore-based producer of high-efficiency back-contact solar panels under the Maxeon brand for residential and commercial markets globally.
Grid / transmission & distribution · Penshaw, Sunderland, UK
Northern Powergrid operates the electricity distribution network for northeast England and Yorkshire, serving approximately 3.9 million homes and businesses and investing in network modernisation to support electrification of heat and transport.
EV charging
UK rapid EV charging network (originally founded as Engenie) operating over 1,300 rapid chargers at 380+ locations, powered by 100% renewable energy.
Nuclear / SMR · Stoke Poges, United Kingdom
Urenco is a multinational uranium enrichment company jointly owned by the UK, Dutch, and German governments, operating centrifuge plants in the UK, Netherlands, Germany, and US and supplying roughly 30% of global enriched uranium.
Solar · Guelph, ON, Canada· CSIQ
Vertically integrated solar company manufacturing panels and developing utility-scale solar and battery storage projects across more than 20 countries.
Climate VC · New York, NY, US
Climate-focused investment firm co-founded by Tom Steyer and Katie Hall deploying across growth equity, venture, and infrastructure to accelerate the net-zero transition.
Recycling / circular · Milton Keynes, United Kingdom· RWI
Anglo-Dutch waste-to-product company that collects, treats, and transforms commercial, industrial, and hazardous waste into secondary raw materials across the UK, Netherlands, Belgium, and France.
Insurer · Paris, France· AXA
Global insurer that was among the first major institutional investors to divest from coal and tar sands, and has committed over €26 billion to green investments as part of its Net Zero 2050 roadmap.
Supply chain sustainability · Paris, France
Global supply chain sustainability ratings platform assessing 175,000+ suppliers across 180 countries using AI combined with 500+ in-house analysts, trusted by 1,500+ global procurement leaders.
Integrated utility · Karlsruhe, Germany· EBK
Germany's third-largest utility, post-nuclear since Neckarwestheim II decommissioned in 2023; deploying a €50bn 2025–2030 programme heavily weighted to renewables with gas plants retained as hydrogen-convertible bridge capacity.
Offshore wind installation · Hofstade-Aalst, Belgium
Belgian family-owned dredging and marine engineering contractor with a large fleet specialised in offshore wind cable installation and foundation work, active on major European and international projects.
ESG data · New York, US
Sustainability technology platform using AI and machine learning to deliver environmental and social impact data on 98,000+ public issuers, 2.3 million private companies, and 450,000+ funds for institutional investors and corporates.
Solar · Fremont, CA, US· ENPH
Designs and manufactures microinverter-based solar and battery energy systems for residential and commercial customers globally.
Agritech · Berkeley, CA, US
Engineers microbes that fix atmospheric nitrogen directly onto crop roots, reducing synthetic fertiliser use and the nitrous oxide emissions from conventional nitrogen application.
Nature-based solutions · Hilo, Hawaii, USA
Hawaii-based reforestation company restoring native tropical ecosystems and providing seeds, software, and funding advisory to forest restoration projects across five continents.
Nature-based solutions · Mill Valley, California, USA
Pioneer community-centred REDD+ forest carbon developer protecting 1.24 million acres across Kenya and the DRC, and the first company to achieve VCS+CCB dual verification for a REDD+ project.
Offshore wind installation · Zwijndrecht, Belgium· DEME
Belgian specialist marine contractor and one of the largest offshore wind installation companies globally, handling foundation installation, cable-laying, and turbine erection across European and international projects.
Integrated utility · Paris, France· ENGI
French-Belgian international utility with installed capacity split roughly evenly between gas and renewables; pivoting toward energy-transition services while maintaining large gas infrastructure and pursuing green-gas conversion.
Onshore wind · Cambridge, US· GEV
Wind turbine manufacturer and energy transition company spun off from General Electric in 2024, supplying onshore and offshore wind turbines globally.
Green Infrastructure Fund · San Francisco, CA, US
Sustainable infrastructure platform that finances, owns, and operates clean energy and resource-efficiency assets including solar, storage, microgrids, and water.
Green hydrogen · Sheffield, UK· ITM
UK PEM electrolyser manufacturer operating the world's largest electrolyser factory in Sheffield, producing green hydrogen for industrial and energy applications.
Onshore wind · Juno Beach, US· NEE
The world's largest generator of renewable energy from wind and solar, operating over 30 GW of wind capacity across North America.
EV Maker · Shanghai, China· NIO
Chinese premium EV maker offering battery-swap capable electric cars, SUVs, and MPVs across three brands (NIO, ONVO, Firefly), with no ICE models.
Carbon removal · Lysaker, Norway
Joint venture between SLB and Aker Carbon Capture (now fully SLB-owned) commercialising modular amine-based carbon capture systems — Just Catch and Big Catch — for industrial emitters globally.
Green hydrogen · Dresden, Germany
German electrolyser manufacturer specialising in high-temperature solid oxide (SOEC) and pressurised alkaline (AEL) systems for industrial-scale green hydrogen production.
Nature-based solutions · Bogotá, Colombia
Colombian pioneer in biodiversity credits and habitat banking, operating Latin America's first certified habitat bank and issuing voluntary biodiversity credits tied to 10 m² of forest preserved or restored for 30 years.
Carbon removal · Muscat, Oman
Oman-founded carbon mineralisation company permanently sequestering CO₂ by injecting it into peridotite rock; 2022 Earthshot Prize winner and XPRIZE Carbon Removal finalist.
Geothermal · Calgary, Canada
Developer of the Eavor-Loop closed-loop geothermal system, which circulates a proprietary fluid through sealed multilateral wellbores without water consumption, now delivering power from its 65 MW Geretsried plant in Germany.
Alt-protein · Glasgow, UK
Produces ABUNDA mycoprotein by continuously fermenting fungi with grain sugars, delivering a complete-protein, high-fibre meat and dairy alternative at industrial scale.
Carbon removal · London, UK
London DAC startup using an electrochemical water-based solvent process to capture CO₂ from the atmosphere with significantly lower energy than incumbent amine systems.
Reinsurer · Munich, Germany· MUV2
World's largest reinsurer and a leader in catastrophe risk quantification and climate-linked insurance solutions, while phasing out coal underwriting and investments.
Tidal energy · Edinburgh, United Kingdom
Scottish developer of tidal stream turbines that installed the world's first fully offshore tidal array in Bluemull Sound, Shetland in 2016, and is now expanding with a EU-funded 4 MW array at EMEC.
Recycling / circular · Carson City, NV, United States
Recycles lithium-ion batteries and manufactures battery components — anode copper foil and cathode active materials — to build a domestic circular battery supply chain.
Nuclear / SMR · Manchester, United Kingdom
Rolls-Royce SMR is developing a 470 MWe pressurised water small modular reactor and was selected as the UK government's chosen SMR technology for initial deployment at Wylfa, backed by up to £599m from the National Wealth Fund.
Insurer · Munich, Germany· ALV
German insurance and asset-management conglomerate (parent of PIMCO and Allianz Global Investors) targeting net-zero insurance portfolios by 2050 and restricting coal underwriting and investment.
Onshore wind · Munich, Germany
Munich-based renewable energy developer and service provider with an onshore wind project pipeline spanning Germany, the UK, and international markets.
Bank · Paris, France· BNP
Europe's largest bank and a top-five global green-bond arranger, with commitments to exit upstream oil and gas project financing and end coal support by 2030.
Integrated utility · Essen, Germany· EOAN
Pan-European energy network operator and retailer serving 50+ million customers across 30 countries; divested fossil generation as Uniper in 2016 and now deploys €48bn through 2030 to build out electricity and gas distribution infrastructure.
EV charging · Los Angeles, California, US· EVGO
One of the largest US public DC fast-charging networks; listed on NASDAQ (EVGO). Originally built and owned by LS Power before its 2021 SPAC listing.
E-fuels and sustainable aviation fuel · Sacramento, US
Operates the world's first fully operational commercial-scale e-fuels facility (Project Pathfinder) in Corpus Christi, Texas, producing eSAF and eDiesel from renewable electricity and waste CO2.
Smart hot water · Cassington, UK
Oxford University spinout making smart hot water cylinders with patented top-down heating technology, reducing electricity consumption and enabling integration with heat pumps and solar PV.
Solar · Herzliya, Israel· SEDG
Makes DC-optimised string inverters and power optimisers that maximise energy yield from solar installations for residential, commercial and utility-scale markets.
EV Maker · Austin, TX, USA· TSLA
US-based pure-play EV manufacturer producing passenger cars, SUVs, and trucks with no ICE vehicles, and the world's leading vertically integrated EV brand by deliveries.
Water & sewerage utility · Warrington, United Kingdom· UU.
UK's largest listed water company, providing water and wastewater services to 7 million people across north-west England; FTSE 100 constituent.
Nuclear / SMR · Cranberry Township, United States
Westinghouse Electric Company is the world's leading nuclear technology supplier, operating AP1000 reactors at Vogtle and developing the AP300 SMR, with a US government-backed fleet contract announced in 2025.
Shipping · Copenhagen, Denmark· MAERSK-B
One of the world's largest container shipping operators, pursuing a 2040 net-zero target and deploying methanol-powered vessels while still operating a predominantly fossil-fuel fleet.
EV charging
UK operator of the GRIDSERVE Electric Highway network, with 190+ high-power charging locations including motorway service hubs and flagship electric forecourts.
Heat pumps · Truro, UK
UK's largest manufacturer of ground source heat pumps, responsible for over half of all ground source heat pump installations in Britain.
Carbon accounting · San Francisco, US
Enterprise decarbonization software platform that enables large companies to monitor, analyze, price, and reduce carbon emissions across operations and value chains.
Green steel · Stockholm, Sweden
Swedish green-steel producer (formerly H2 Green Steel) building a hydrogen-based direct-reduction steel plant in Boden; rebranded to Stegra in 2024.
E-fuels and synthetic aviation fuel · Berkeley, US
Electrochemical carbon transformation company producing E-Jet synthetic aviation fuel from CO2, water, and renewable electricity with up to 90% lower lifecycle emissions.
Geothermal · Stockholm, Sweden
Swedish geothermal project developer and financier that builds and operates low-temperature binary-cycle geothermal plants globally, backed by Ingka Investments, Baker Hughes, and Breakthrough Energy Ventures.
Climate VC · Kirkland, WA, US
Bill Gates-led multi-billion dollar climate tech VC fund backing early-stage technologies that can cut global greenhouse gas emissions at meaningful scale.
Electric heating & heat pumps · Dublin, Ireland
World's largest electric heating business, manufacturing heat pumps, high heat retention storage heaters, and smart controls that enable the shift away from fossil-fuel heating.
EV Maker · Newark, CA, USA· LCID
US luxury EV maker producing the Lucid Air sedan (500+ mile EPA range) and Gravity SUV, backed by Saudi Arabia's Public Investment Fund, with an industry-leading powertrain efficiency.
ESG data · San Diego, US
World's most widely adopted ESG data management and reporting platform for commercial real estate, covering 21 billion sq ft across 90+ countries for owners and asset managers.
Onshore wind · Scottsdale, US· TPIC
The only independent US-based manufacturer of composite wind blades at scale, supplying major turbine OEMs from facilities across four continents.
Hydrogen fuel cells · Cranleigh, UK· AFC
UK manufacturer of alkaline fuel cell systems that use hydrogen to generate zero-emission electricity for construction sites, events and off-grid applications.
Solar · Albuquerque, NM, US· ARRY
Manufactures single-axis solar tracker systems for utility-scale solar farms, enabling panels to follow the sun and increase energy output.
Green hydrogen · Devens, Massachusetts, USA
US electrolyser startup developing 100 MW HYPRPlant PEM systems targeting $1.50/kg green hydrogen, the first green hydrogen unicorn backed by bp Ventures and the US DOE.
Cement · Heidelberg, Germany· HEIDEL
German cement and aggregates major operating over 3,000 production sites in 50+ countries, pursuing carbon capture (Brevik CCS project) while remaining a top-five global emitter in the sector.
Energy storage · London, UK· IES
Global manufacturer of vanadium flow batteries (ENDURIUM and VS3 product lines) for commercial and utility-scale stationary energy storage, with operations across the UK, US, Canada, China, and Australia.
Alt-protein · Chicago, IL, US
Ferments a Yellowstone-origin fungal microorganism to produce Fy protein, a complete nutritional fungi protein used in meat and dairy alternatives with a minimal land and water footprint.
EV charging
UK EV charging hardware manufacturer and network operator with over 250,000 charge points; majority owned by EDF Energy after a 2022 acquisition.
Green steel · Woburn, USA
MIT spinout commercialising molten oxide electrolysis (MOE) to convert iron ore directly into steel using electricity, eliminating coal and coke from the ironmaking process.
EV Maker · Shenzhen, China· 1211
Chinese EV and battery manufacturer — the world's largest NEV seller — producing only battery-electric and plug-in hybrid vehicles after halting pure-ICE production in 2022.
Climate VC · Oakland, CA, US
Oakland-based early-stage VC investing in climate and sustainability companies spanning clean energy, circular economy, sustainable food, and mobility sectors.
Agritech · Nottingham, UK
Develops endophytic bacteria-based biofertilisers that replace synthetic nitrogen fertilisers, cutting agricultural greenhouse gas emissions and improving soil health.
EV charging · Campbell, California, US· CHPT
Operator of one of the world's largest EV charging networks, offering hardware, software and services across North America and Europe with over 1.3 million ports.
Energy storage · Arlington, VA, US· FLNC
Global energy storage technology and services company offering utility-scale battery systems and AI-powered optimization software, ranked among the top three BESS providers worldwide.
Grid / smart-grid & VPP software · Dublin, Ireland
GridBeyond is an AI-powered energy intelligence platform that enables commercial and industrial customers to participate in demand response, ancillary services markets, and virtual power plant aggregation across UK, Ireland, and North America.
Regenerative ag · Boston, MA, US
Combines microbial seed treatments, digital agronomy tools, and a carbon marketplace to help row-crop farmers adopt regenerative practices and generate verified carbon credits.
Solar · Thun, Switzerland· MBTN
Swiss manufacturer of high-efficiency heterojunction solar cells and modules targeting premium residential and commercial markets.
Carbon removal · London, UK
UK point-source carbon capture company providing modular CCS equipment and proprietary solvents to decarbonise hard-to-abate industries such as cement, steel, and waste-to-energy.
Agricultural climate risk AI · San Francisco, US
ClimateAi provides an AI-driven climate resilience platform with hyper-local seasonal forecasting and risk analytics for global agricultural and water supply chains, helping food companies adapt sourcing and operations to a changing climate.
Onshore wind · Chicago, US
Chicago-based independent developer, owner, and operator of clean energy facilities with one of the largest onshore wind portfolios in North America.
Nuclear / SMR · Paris, France
Newcleo is developing MOX-fuelled lead-cooled fast reactors to generate low-carbon power while consuming nuclear waste, with a prototype 30 MWe reactor planned in France and over €537m raised.
Smart heating controls · Munich, Germany
Europe's largest smart thermostat and heating-control company, using AI and geofencing to cut household heating emissions; backed by Amazon, E.ON and the European Investment Bank.
Energy storage · Oxford, UK
Battery storage optimization and trading software company whose AI-powered EVOLVE platform manages over 5.5 GW of contracted grid-scale battery and renewable assets across the UK, US, and Australia.
Energy storage · London, UK
Long-duration energy storage pioneer using proprietary liquid air energy storage (LAES/CRYOBattery) technology, with over £500 million secured and a 50 MW/300 MWh facility under construction in Manchester.
Energy storage · Cambridge, MA, US
Alphabet X spin-off developing pumped heat (electro-thermal) long-duration energy storage using molten salt and antifreeze, with $122 million raised and a demonstration project underway in Spain.
Asset manager · New York, US
TIAA's investment management arm and one of the largest responsible-investment managers globally, offering dedicated ESG fixed-income, equity, and real-assets strategies.
Water & sewerage utility · Dunfermline, United Kingdom
Statutory corporation wholly owned by the Scottish Government, providing water and sewerage services to 2.46 million households and 150,000 businesses across Scotland; formed in 2002 from a merger of three regional water authorities.
Water & sewerage utility · Coventry, United Kingdom· SVT
FTSE 100 water and sewerage company serving 4.6 million households across the Midlands and north of England, repeatedly sanctioned for sewage spills and storm overflow releases.
Agritech · London, UK
Develops wearable cattle devices that continuously measure enteric methane emissions and catalytically oxidise them, reducing livestock methane output at the source.
EV charging · London, UK
UK on-street public EV charging network targeting residents without private driveways; raised £65M from the UK National Wealth Fund and Aviva Investors in 2025.
Energy storage · Wilsonville, OR, US· GWH
Manufacturer of long-duration iron flow battery energy storage systems using iron, salt, and water for utility-scale and commercial applications.
Sustainable aviation fuel · Deerfield, US
Produces sustainable aviation fuel from ethanol using patented alcohol-to-jet (ATJ) technology at its Freedom Pines commercial-scale facility in Georgia.
Sustainable aviation fuel · Oxford, UK
University of Oxford spin-out converting CO2 and hydrogen into sustainable aviation fuel via a patented single-step Fischer-Tropsch process, with a pilot facility operational at Oxford Airport.
Recycling / circular · London, United Kingdom
Deploys AI-vision robotic picking systems in materials recovery facilities to automate waste sorting, improving purity and recovery rates for recyclable streams.
Nature-based solutions · London, United Kingdom
London-based impact carbon finance firm providing long-term upfront project finance to REDD+, reforestation, regenerative agriculture, and blue carbon developers globally.
Energy storage · San Francisco, CA, US· STEM
AI-driven energy storage software company whose Athena platform forecasts demand and optimises dispatch of battery storage assets for commercial and utility customers.
Recycling / circular · Nottingham, United Kingdom
Chemically recycles mixed polyester-cotton textile waste and PET packaging into high-purity raw materials — polyester and cellulose — that re-enter fiber and plastic supply chains.
EV charging · Reston, Virginia, US
Volkswagen-funded US public fast-charging network operating over 5,600 DC fast chargers at 1,080+ locations across the US and Canada.
Energy storage · Edison, NJ, US· EOSE
Designs and manufactures Znyth zinc-based long-duration battery energy storage systems for utility-scale and microgrid applications, offering 3 to 12 hours of discharge.
E-fuels and synthetic fuels · Houston, US
International electrofuel company producing power-to-liquid e-SAF, e-gasoline, and e-methanol from green hydrogen and captured CO2 at facilities in Chile and Texas.
Carbon removal · Durham, NC, USA· NPWR
US clean-energy company licensing the Allam-Fetvedt Cycle, which combusts natural gas with pure oxygen and supercritical CO₂ to generate zero-emission, 24/7 dispatchable power with integrated CCS.
Weather intelligence · Boston, US
Tomorrow.io operates an AI-native weather intelligence platform and proprietary satellite constellation that provides real-time and predictive weather data to help enterprises manage operational risk from severe weather.
EV charging · Barcelona, Spain· WBX
Spanish EV charging hardware and energy management company listed on the NYSE, with home, commercial and public charging products including bidirectional V2G chargers sold globally.
Agritech · Harpenden, UK
UK agricultural data marketplace enabling farmers, agribusinesses, and researchers to share, access, and monetise farm and environmental datasets to drive precision and sustainable agriculture.
Nature-based solutions · Philadelphia, Pennsylvania, USA
North America's largest forest carbon offset developer with 60+ Improved Forest Management projects covering nearly four million acres in both voluntary and California compliance markets.
Energy storage · Durham, NC, US
Battery energy storage software and services company whose HybridOS energy management platform supports over 25 GWh of BESS across 200 projects, expanded via acquisition of Powin's assets in 2025.
Recycling / circular · London, United Kingdom
Provides AI-powered waste analytics hardware and software that continuously tracks waste composition on conveyor belts, giving recyclers real-time data to optimise sorting and compliance.
Tidal energy · Edinburgh, United Kingdom· SAE
Developer and operator of tidal stream energy projects, owning the 6 MW MeyGen array in the Pentland Firth — the world's largest operational tidal stream installation — with CfD contracts for 59 MW of further expansion.
Carbon removal · London, UK
UK developer of large-scale CCS and BECCS infrastructure, leading the Acorn CCS project in Scotland and building CO₂ transport and storage hubs across the UK, Norway, and US.
Water utility
UK's largest water-only company by revenue and population, supplying drinking water to 3.9 million people across the London commuter belt, east and south-east England; owned by Allianz Capital Partners (36.6%), HICL Infrastructure (36.6%) and DIF (26.8%).
Energy data · Washington DC, US
Energy intelligence platform aggregating utility data from 2,000+ utilities to enable businesses and developers to build clean energy products and generate accurate ESG energy reporting.
EV charging · Miami Beach, Florida, US· BLNK
Owner, operator and provider of EV charging equipment and networked services across the United States and internationally.
Cement · Zug, Switzerland· HOLN
The world's largest cement and building materials company, operating in over 70 countries and marketing low-carbon ECOPact products while still accounting for around 1.5% of global CO2 emissions.
Satellite water monitoring · Washington, US
Hydrosat uses thermal infrared satellite imagery to measure crop water stress and evapotranspiration at field level, enabling precision irrigation recommendations and drought risk management for agriculture and food security.
Water & sewerage utility · Durham, United Kingdom
Water and sewerage company serving 2.7 million customers in north-east England and 1.7 million in Essex and Suffolk (trading as Essex & Suffolk Water), 75% owned by CK Infrastructure Holdings with 25% held by KKR.
Nuclear / SMR · Lynchburg, United States· BWXT
BWX Technologies manufactures nuclear propulsion systems and fuel for the US Navy and is a key commercial supplier of reactor components, pressure vessels, and nuclear services for both existing plants and advanced reactor programmes.
Gas utility / LNG · Madrid, Spain· ENG
Enagas is Spain's gas transmission system operator, managing the country's main gas pipeline network and three LNG regasification terminals, serving as a key European import hub.
EV charging
Operator of the UK's largest on-street EV charging network, converting lampposts into charge points across British cities; wholly owned by Shell since February 2021.
Nature-based solutions · Oxford, United Kingdom
Oxford-based AI and drone ecology platform enabling large-scale ecosystem restoration and monitoring, managing 70,000+ hectares for mining, industrial, and conservation clients worldwide.
Nuclear / SMR · Corvallis, United States· SMR
NuScale Power is the first SMR developer to receive NRC design certification for its modular 77 MWe VOYGR light-water reactor, targeting utilities and industrial customers globally.
Sustainable aviation fuel · Oxford, UK
UK-based Fischer-Tropsch technology licensor enabling commercial production of power-to-liquid SAF and e-fuels from waste and renewable feedstocks.
Agricultural climate forecasting · San Diego, US
Benchmark Labs uses AI to produce asset-specific microclimate weather forecasts for agriculture, renewable energy, and land management, correcting biases in grid-level models to deliver field-precision predictions.
Alt-protein · Boulder, CO, US
Ferments non-GMO mycelium at commercial scale to produce whole-cut meat alternatives with the fibre profile, protein density, and fibrous texture of whole-muscle meat.
Alt-protein · San Francisco, CA, US
Cultivates pork fat cells in proprietary bioreactors to produce USDA- and FDA-approved Mission Fat, a cultivated fat ingredient for plant-based meat products.
Synthetic fuels · London, UK
UK synthetic fuel startup producing carbon-neutral e-fuels via Fischer-Tropsch synthesis from atmospheric CO2 and green hydrogen, achieving the world's first RAF synthetic fuel flight in 2021.
Carbon removal · Houston, TX, USA
Occidental's DAC subsidiary operating STRATOS — the world's largest direct air capture facility in Texas — using Carbon Engineering's technology acquired in 2023.
Water & sewerage utility
Water and sewerage company serving 6 million customers across eastern England, owned by the Osprey Consortium of global infrastructure funds.
Oil & gas · Houston, TX, United States· BKR
Oilfield technology and services company with industrial and energy technology divisions; revenues remain predominantly tied to oil and gas extraction and LNG despite some emerging clean-energy offerings.
Automaker · Munich, Germany· BMW
German premium automaker selling iX, i4, i5, and i7 fully electric models alongside a large ICE and PHEV portfolio under the BMW, MINI, and Rolls-Royce brands.
Renewable energy infrastructure· BEP
One of the world's largest publicly traded renewable energy platforms, with hydropower, wind, solar and storage assets across 30+ markets.
Water & sewerage utility · Cardiff, United Kingdom
Not-for-profit water and sewerage company serving 3.1 million customers across Wales and parts of Herefordshire, owned by Glas Cymru — a company limited by guarantee with no shareholders — with surpluses reinvested in services.
Gas utility / LNG · Brussels, Belgium
Fluxys is an independent gas infrastructure group operating Belgium's gas transmission grid and the Zeebrugge LNG terminal, one of Europe's largest LNG import hubs.
Automaker · Dearborn, MI, USA· F
US automaker producing the F-150 Lightning and Mustang Mach-E EVs via its Ford Model e division while still deriving the bulk of earnings from ICE F-Series trucks.
Alt-protein · London, UK
Biotech company producing cultivated animal fat from pig and cow stem cells as a drop-in ingredient for plant-based meat and food manufacturing.
Nature-based solutions · San Francisco, California, USA
US public-benefit biotech reforestation company developing photosynthesis-enhanced trees claimed to grow faster and capture more carbon, partnering with landowners on VCM projects in the US South and mid-Atlantic.
Asset management / infrastructure · Sydney, Australia· MQG
Global asset manager and major infrastructure investor; one of the world's largest green energy investors.
Automaker · Stuttgart, Germany· MBG
German luxury automaker producing the EQ-series fully electric line (EQS, EQE, EQB) while maintaining a large ICE and PHEV portfolio across passenger cars, vans, and trucks globally.
Water & sewerage utility · Exeter, United Kingdom· PNN
FTSE 250 water utility group that owns and operates South West Water, Bristol Water and SES Water, serving 1.7 million customers across south-west England and Surrey.
Integrated utility · Essen, Germany· RWE
Germany's second-largest utility, generating over 129 TWh in 2023 with gas as the dominant source followed by lignite; CO₂ intensity has fallen ~70% since 2012 and coal exit is targeted for 2030, but the fossil mix remains substantial.
Asset manager · Boston, US· STT
Global custodian bank and asset manager that operates the SPDR ESG ETF suite and engages portfolio companies on climate risk disclosure through its asset-stewardship programme.
Weather risk insurance · Madison, US
Understory provides parametric weather risk insurance for businesses — including auto dealers and renewable energy operators — powered by a proprietary network of hyperlocal ground-level weather sensors that measure conditions 125,000 times per second.
Automaker · Wolfsburg, Germany· VOW3
German automotive giant pursuing aggressive electrification across its VW, Audi, Porsche, SKODA, and SEAT brands via the MEB and PPE platforms while still selling millions of ICE vehicles annually.
Alt-protein · San Francisco, CA, US
Produces FDA-cleared cultivated coho salmon by growing Pacific salmon cells in bioreactors that mimic wild fish physiology, targeting restaurant markets as the first approved cultivated seafood in the US.
Shipping · Marseille, France
France-based global container shipping group operating over 600 vessels, investing in LNG and methanol-powered ships while still overwhelmingly dependent on heavy fuel oil.
ESG analytics · London, UK
AI-driven ESG analytics platform that continuously monitors regulatory and reputational risks across 4,000+ global ESG regulations, serving nearly 200 enterprise clients including Dell and Cisco.
Water & sewerage utility · Bath, United Kingdom
Water and sewerage company serving 2.9 million customers across Dorset, Somerset, Wiltshire and the Bristol area, wholly owned by Malaysian conglomerate YTL Corporation since 2002.
Integrated utility · Windsor, United Kingdom· CNA
Owner of British Gas, the UK's largest residential gas supplier; generation capacity is primarily gas-backed with some legacy nuclear stakes and limited renewables; gas supply to homes remains the core business.
Nuclear / SMR · Bethesda, United States· LEU
Centrus Energy is the only US producer of HALEU enriched uranium, operating the first new US-owned enrichment plant since 1954 at Piketon, Ohio, supplying fuel for advanced reactor programmes.
Wildfire retardant · Clayton, US· PRM
Perimeter Solutions is the world's largest producer of aerial wildfire fire retardants, including the industry-standard PHOS-CHEK brand supplied to the US Forest Service and CAL FIRE for long-term wildfire suppression.
Recycling / circular · Trenton, NJ, United States
Runs brand-funded collection and recycling programs in over 20 countries for hard-to-recycle materials — cigarette butts, coffee pods, flexible packaging — that conventional recyclers reject.
Offshore wind development · Stavanger, Norway· EQNR
Norwegian oil and gas major with a significant offshore wind portfolio including Dogger Bank A/B/C (world's largest wind farm) and Hywind Scotland (world's first commercial floating wind farm).
Gas utility / LNG · Horley, UK
SGN (Scotia Gas Networks) operates the gas distribution networks in Scotland and southern England, serving approximately 5.9 million homes and businesses.
Water utility
Water-only company supplying 2.3 million customers across Kent, Sussex, Surrey and Hampshire, owned by a consortium managed by Hastings Infrastructure including Utilities Trust of Australia (50%), Desjardins (25%) and NatWest pension fund (25%).
Nuclear / SMR · Jupiter, United States
Holtec International develops the SMR-300 small modular reactor and filed the first NRC construction permit application for twin SMR-300 units at the Palisades site in January 2026.
Steel · Pohang, South Korea· 005490
South Korea's largest steelmaker and one of the world's top-five producers, with an active hydrogen reduction steelmaking (HyREX) R&D programme but current output overwhelmingly from blast furnaces.
Gas utility / LNG · Coventry, UK
Cadent Gas is the UK's largest gas distribution network operator, delivering gas to approximately 11 million homes and businesses across four licensed distribution networks in England.
Diversified mining · Melbourne, Australia· BHP
Global diversified miner producing iron ore, copper, and metallurgical coal; divested thermal coal operations in 2022 but retains large met-coal exposure through the BHP Mitsubishi Alliance Queensland joint venture.
Airline · Cologne, Germany· LHA
Europe's largest airline group by revenue, operating Lufthansa, Swiss, Austrian, and Brussels Airlines, with SAF commitments that cover a small fraction of current fuel demand.
Gas utility / LNG · Warwick, UK
National Gas is the operator of the UK's national gas transmission system, managing approximately 7,660 km of high-pressure pipelines that carry gas from entry points to local distribution networks.
Oil & gas · Madrid, Spain· REPYY
Spanish integrated oil company claiming a multi-energy transition including wind and solar, but remaining substantially dependent on fossil fuel refining and upstream production with contested net-zero targets.
Gas utility / LNG · San Donato Milanese, Italy· SRG
Snam is Italy's leading gas infrastructure company, operating one of Europe's most extensive gas transmission and distribution networks alongside regasification and storage assets.
Nature-based solutions · Zurich, Switzerland
World's largest carbon project developer, having originated 1,000+ climate projects across 50+ countries including REDD+, reforestation, blue carbon, and sustainable land use.
Automaker · Toyota City, Japan· TM
World's largest automaker by volume, with a dominant hybrid (Prius, RAV4 Hybrid) portfolio but a delayed battery EV transition and documented lobbying against EV mandates in multiple markets.
Green hydrogen · Slingerlands, New York, USA· PLUG
US developer of hydrogen fuel cell systems and electrolysers, the world's largest buyer of liquid hydrogen with over 280 hydrogen fuelling stations deployed globally.
Hydrogen fuel cells · San Jose, California, USA· BE
US manufacturer of solid oxide fuel cells primarily fuelled by natural gas for data centres and industry, with an expanding SOEC electrolyser product line for green hydrogen production.
Water & sewerage utility · Belfast, United Kingdom
Government-owned company providing water and sewerage services to 800,000 properties across Northern Ireland, wholly owned by the Department for Infrastructure; faces long-standing infrastructure underinvestment and regulatory scrutiny.
Automaker · Amsterdam, Netherlands· STLA
Multi-brand global automaker (Jeep, Dodge, Ram, Fiat, Peugeot, Citroën, Vauxhall) electrifying its lineup across 14 brands under the Dare Forward 2030 plan while still ICE-dominant by volume.
Iron ore & base metals mining · Rio de Janeiro, Brazil· VALE
The world's largest iron ore and nickel producer, whose Scope 3 emissions from downstream steelmaking make it one of the highest indirect emitters among global mining companies.
Automaker · Detroit, MI, USA· GM
US automaker pursuing EV transition via the Ultium platform (Chevy Equinox EV, Silverado EV) while remaining heavily dependent on ICE trucks and SUVs for the majority of its revenue.
Oil & gas · Houston, TX, United States· SLB
World's largest oilfield services company (formerly Schlumberger), providing drilling, reservoir characterisation, and production technology to the fossil fuel industry across more than 120 countries.
Water & sewerage utility · Bradford, United Kingdom
Water and sewerage company serving 5.2 million customers in Yorkshire, operated via parent Kelda Holdings; fined repeatedly for sewage spills and storm overflow violations.
Integrated utility · Düsseldorf, Germany
German gas and power company majority-owned by the state after a 2022 bailout; sold coal plant Datteln IV in late 2025 but is planning 2 GW of new gas-fired capacity while the government works toward reprivatisation.
Water & sewerage utility · Worthing, United Kingdom
Water and sewerage company serving 4.6 million customers across Kent, Sussex, Hampshire and the Isle of Wight; issued a record £90m Ofwat fine in 2021 for deliberate illegal sewage dumping, majority-owned by Macquarie since 2021.
Oil & gas · Rome, Italy· E
Italian integrated energy company with a dedicated renewable electricity subsidiary (Plenitude) but continuing significant upstream oil and gas expansion across Africa and the Mediterranean.
Water utility · Reading, United Kingdom
Largest UK water and wastewater company, serving 16 million customers. Subject to regulatory scrutiny over sewage discharges and financial instability.
Oil & gas · Courbevoie, France· TTE
French integrated supermajor that rebranded from Total in 2021 claiming a renewables pivot, but continues major oil and gas expansion projects in Africa, the Middle East, and LNG globally.
Oil & gas · London, United Kingdom· BP
British multinational oil and gas company; global supermajor with stated net-zero ambitions that have been repeatedly scaled back.
Bank · New York, US· C
Major US bank with net-zero commitments and green-bond issuance that nonetheless ranks among the world's top five fossil-fuel financiers per the Banking on Climate Chaos report.
Oil & gas · Houston, TX, United States· COP
Largest US pure-play exploration and production company, focused on conventional and unconventional oil and gas in North America, Europe, Asia, and Australia with no material clean-energy investments.
Oil & gas · Oklahoma City, OK, United States· DVN
US independent E&P company focused on unconventional oil and gas production in the Permian Basin, Eagle Ford, Anadarko, and Williston basins, with no material clean-energy investments.
Gas utility / LNG · Dallas, US· ATO
Atmos Energy is the largest natural-gas-only distribution utility in the United States, delivering gas to over 3 million residential, commercial, industrial, and institutional customers across eight states.
Asset manager · New York, US· BLK
World's largest asset manager that built the dominant ESG ETF franchise (iShares) but withdrew from the Net Zero Asset Managers initiative in January 2025 and continues to hold significant fossil-fuel positions.
Airline · Atlanta, USA· DAL
America's largest airline by passengers carried, operating over 5,000 daily flights and investing modestly in sustainable aviation fuel while remaining almost entirely dependent on jet fuel.
Steel · Luxembourg City, Luxembourg· MT
The world's second-largest steelmaker by volume, producing roughly 60 million tonnes annually from blast-furnace operations while piloting hydrogen-based DRI under its XCarb initiative.
Bank · London, UK· HSBA
Global bank pledging $1 trillion in sustainable finance by 2030 that was banned by the UK Advertising Standards Authority in 2022 for misleading climate ads while continuing to finance fossil-fuel expansion.
Oil & gas · Houston, TX, United States· OXY
US Permian Basin oil producer that markets its Oxy Low Carbon Ventures direct-air-capture subsidiary as a climate credential while continuing to expand fossil production and pursuing the acquisition of CrownRock.
Oil & gas · Rio de Janeiro, Brazil· PBR
Brazilian state-controlled oil major and a world leader in deep-water oil production, with ambitious offshore pre-salt expansion plans that dwarf its limited clean-energy investments.
Gas utility / LNG · Houston, US· LNG
Cheniere Energy is the United States' largest LNG exporter, operating the Sabine Pass and Corpus Christi liquefaction terminals with combined capacity exceeding 45 mtpa.
Diversified mining & commodity trading · Baar, Switzerland· GLEN
One of the world's largest diversified commodity producers and traders, with major thermal coal operations alongside copper, cobalt, nickel, and zinc; acquired Teck's Elk Valley steelmaking coal division in 2024.
Integrated utility · Warsaw, Poland· PGE
Poland's largest electricity producer, coal-dominant with over 40 power stations including the Bełchatów lignite plant (the world's 5th largest coal-fired power station); renewables investment is growing but the coal base remains overwhelming.
Oil & gas · London, United Kingdom· SHEL
Global oil and gas supermajor; one of the world's largest carbon emitters. UK-incorporated since 2022.
Oil & gas · Houston, TX, United States· HAL
Major oilfield services company specialising in cementing, drilling, completion, and production services; its business is structurally dependent on continued fossil fuel extraction expansion.
Coal mining · Sydney, Australia· YAL
One of Australia's largest coal producers, majority-owned by Yanzhou Coal Mining of China, with thermal and semi-soft coking coal operations across New South Wales and Queensland.
Oil & gas · San Ramon, CA, United States· CVX
American integrated supermajor and the second-largest US oil company, with operations spanning extraction, refining, and petrochemicals and no material near-term transition from fossil fuels.
Bank · New York, US· JPM
Largest US bank and ranked the world's biggest financier of fossil fuels by Banking on Climate Chaos, providing tens of billions annually to oil, gas, and coal companies.
Gas utility / LNG · New York, US· NFE
New Fortress Energy develops and operates LNG infrastructure globally, supplying natural gas to power-scarce markets across the Caribbean, Latin America, Europe, and Asia through floating and land-based import terminals.
Coal mining · Sydney, Australia· WHC
Australia's largest independent coal company, operating thermal and metallurgical coal mines in New South Wales and Queensland with no stated plans to exit coal.
Coal mining & power generation · Beijing, China· 1088
China's largest coal producer and one of the world's largest by output, also operating an integrated system of coal-fired power plants, railways, and ports.
Oil & gas · Dhahran, Saudi Arabia· 2222
World's largest oil company by production and revenue, majority-owned by the Saudi government, with explicit plans to expand production capacity and no credible near-term decarbonisation pathway.
Coal power generation · Ahmedabad, India· ADANIPOWER
India's largest private thermal power producer, operating coal-fired power plants with total installed capacity exceeding 15,000 MW.
Coal mining · Kolkata, India· COALINDIA
State-owned holding company and the world's largest coal producer by volume, responsible for over 80% of India's domestic coal output.
Coal mining · St. Louis, United States· BTU
The world's largest private-sector coal company, producing thermal and metallurgical coal from mines in the US and Australia.
Gas utility / LNG · Washington, DC, US· VG
Venture Global LNG develops, builds, and operates modular LNG export facilities on the US Gulf Coast, targeting low-cost liquefaction through a standardised design approach.
Coal mining · Canonsburg, United States· CEIX
One of the largest US thermal coal producers, operating the Pennsylvania Mining Complex and a coal export terminal, with corporate heritage dating to 1864.