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Energy Transition EPC, Engineering & Construction Stocks

Someone has to build all of it. Solar farms, offshore wind parks, transmission lines, battery sites and nuclear plants are delivered through a chain of owners, engineering, procurement and construction (EPC) firms, engineers and specialist subcontractors, and the build-out of clean energy and the grid that carries it has put years of visible work into a sector that has always run in cycles.

This clean energy EPC stocks list covers 18 listed contractors and engineers across six segments: grid and electrical infrastructure specialists, utility-scale solar and power generation EPCs, nuclear engineering and construction firms, offshore wind and marine contractors, diversified international EPC groups, and hydrogen and industrial process engineers. Filter by segment to isolate the pure grid names, by exposure to separate the focused contractors from the conglomerates, or by listing to separate US contractors from the European and Asian groups.

Contract structure matters more here than in most sectors: a fixed-price lump-sum contract puts cost overruns on the contractor, while reimbursable and unit-price work shifts that risk back to the client, and the difference has bankrupted builders in past cycles. Much of this work is also technology-neutral: a transmission contractor earns a similar margin connecting solar, wind, storage or a nuclear restart. Neutrality is not the same as safety, because awards, backlog conversion, client solvency and policy still decide results, and the companies here range from field contractors to engineers, technology licensors and one asset-owning hybrid. Exposure varies widely, and each company entry below states how much of the wider group the qualifying work represents.

18 CompaniesCombined Mkt Cap: $258BMarket data updated: August 27, 2026
18 companies
FX rates — August 27, 2026: 🇨🇦 USDCAD 1.386  ·  🇪🇺 EURUSD 1.166  ·  🇬🇧 GBPUSD 1.359  ·  🇮🇳 USDINR 95.53  ·  🇰🇷 USDKRW 1,382
Clean Energy EPC Stocks — comparison of listed companies showing market capitalization, headquarters and business segment. Activate a row’s expand button for full company detail.
Expand Company Ticker HQ Segment Listed
Quanta Services
PWR $93B 🇺🇸 United States Grid & Electrical Infrastructure NYSE
Quanta Services
HQ: 🇺🇸 United States Segment: Grid & Electrical Infrastructure

Quanta Services is a North American specialty infrastructure contractor. Its Electric Infrastructure Solutions segment designs, builds, upgrades and maintains transmission and distribution networks, substations and electrical systems for utilities, power generators, data centres and advanced-manufacturing facilities. It also provides EPC, repowering and maintenance services for utility-scale wind, solar, hydro and battery-storage projects, and owns 50% of LUMA Energy, the operator of Puerto Rico’s transmission and distribution system. The Underground Utility and Infrastructure segment builds and maintains natural-gas distribution networks and pipelines and provides midstream, downstream, industrial and mechanical services. Electric infrastructure is the majority of the business; the remaining exposure spans conventional energy, pipeline and industrial infrastructure.

NYSE

$93B

Grid & Electrical Infrastructure
VINCI
DG.PA $74B 🇫🇷 France Diversified International EPC Euronext Paris
VINCI
HQ: 🇫🇷 France Segment: Diversified International EPC

VINCI is a French concessions, energy-services and construction group. VINCI Autoroutes and VINCI Airports operate transport concessions; VINCI Construction builds civil, transport and building infrastructure; and Energy Solutions comprises VINCI Energies and Cobra IS. VINCI Energies designs, installs and maintains electrical, digital and industrial systems, including grid connections, substations, building energy systems and data-centre infrastructure. Cobra IS delivers large energy and industrial EPC projects and also develops, builds and operates renewable-generation, storage and electricity-transmission assets. The group therefore combines contracting and recurring concession and asset ownership. Its energy-transition exposure comes mainly from electrical infrastructure, renewable EPC and owned renewable and transmission projects, while motorways, airports and general construction remain substantial parts of the business.

Euronext Paris

$74B

Diversified International EPC
MasTec
MTZ $20B 🇺🇸 United States Grid & Electrical Infrastructure NYSE
MasTec
HQ: 🇺🇸 United States Segment: Grid & Electrical Infrastructure

MasTec, Inc. is a North American infrastructure engineering and construction contractor operating through Communications, Clean Energy and Infrastructure, Power Delivery, Pipeline Infrastructure and Other. Clean Energy and Infrastructure builds utility-scale wind, solar, battery storage, hydrogen and other generation projects, but also undertakes natural-gas generation, data-centre, water, transport, environmental and heavy-civil work. Power Delivery constructs and maintains transmission and distribution networks, substations, grid-modernisation systems, battery infrastructure and emergency restoration, alongside some gas-line and data-centre work. Communications builds wireless and fibre networks, while Pipeline Infrastructure serves natural-gas, water, carbon-capture and related markets. Renewable generation and electric-grid construction are major businesses within a diversified contractor that also depends on communications, pipelines and conventional infrastructure.

NYSE

$20B

Grid & Electrical Infrastructure
Hyundai Engineering & Construction
000720.KS $11B 🇰🇷 South Korea Nuclear Engineering & Construction KRX
Hyundai Engineering & Construction
HQ: 🇰🇷 South Korea Segment: Nuclear Engineering & Construction

Hyundai Engineering & Construction Co., Ltd. is a diversified South Korean contractor spanning housing, commercial buildings, transport and civil infrastructure, and power and industrial plants. Its nuclear business has built domestic Korean reactors and led construction of the four APR1400 units at the completed Barakah plant in the UAE. It is also pursuing overseas large-reactor and small-modular-reactor opportunities, including work with Holtec on the proposed SMR-300 project at the Palisades site in Michigan; as of August 2026 that project remained subject to Nuclear Regulatory Commission approvals. The company has announced cooperation with other reactor developers, including TerraPower, but these arrangements should not be read as completed EPC awards. Nuclear is a strategically important capability within a much broader construction group whose results also depend on Korea’s housing and infrastructure cycle.

KRX

$11B

Nuclear Engineering & Construction
AtkinsRéalis
ATRL.TO $9.9B 🇨🇦 Canada Nuclear Engineering & Construction Grid & Electrical Infrastructure TSX
AtkinsRéalis
HQ: 🇨🇦 Canada Segment: Nuclear Engineering & Construction Grid & Electrical Infrastructure

AtkinsRéalis Group Inc. is a Canadian engineering, project-management and nuclear-services company. Its Nuclear business is the original-equipment manufacturer, steward and exclusive commercial licensee of CANDU technology; the Government of Canada retains ownership of the intellectual property through Atomic Energy of Canada Limited. The business supports reactor life extensions and refurbishments, operations, waste management and decommissioning, new-build programmes, and development of the 925 MW CANDU Monark design. Linxon provides turnkey substation engineering and construction, while AtkinsRéalis’s regional engineering businesses work across power and renewables as well as transportation, buildings, water, defence and industrial infrastructure. The result is a diversified global engineering group with a distinctive nuclear franchise and additional grid exposure, not a reactor developer or nuclear pure play.

TSX

$9.9B

Nuclear Engineering & Construction Grid & Electrical Infrastructure
SPIE
SPIE.PA $8.5B 🇫🇷 France Grid & Electrical Infrastructure Euronext Paris
SPIE
HQ: 🇫🇷 France Segment: Grid & Electrical Infrastructure

SPIE SA is a European multi-technical services group that designs, installs, operates and maintains energy, communications, building and industrial infrastructure. Its energy-transition work includes high-voltage transmission and distribution networks, substations, renewable and battery-storage installations, nuclear-fleet maintenance, wind-asset services, EV charging and energy-efficiency upgrades for buildings and industry. The same operating platform also serves data centres, communications networks, facilities management, industrial automation, defence, petrochemicals, LNG and oil and gas customers. Revenue is largely service- and framework-contract based rather than dependent on a small number of lump-sum mega-projects. This leaves SPIE with material exposure to Europe’s grid expansion and energy-efficiency spending inside a diversified technical-services portfolio.

Euronext Paris

$8.5B

Grid & Electrical Infrastructure
Technip Energies
TE.PA $6.0B 🇫🇷 France Hydrogen & Industrial Process EPC Euronext Paris
Technip Energies
HQ: 🇫🇷 France Segment: Hydrogen & Industrial Process EPC

Technip Energies N.V. is a Netherlands-incorporated engineering and technology company headquartered in France. Project Delivery designs and executes large energy and industrial facilities, while Technology, Products & Services supplies process technologies, proprietary equipment, consulting and engineering. LNG remains the largest part of the business, alongside petrochemicals, refining and conventional energy infrastructure. Its energy-transition portfolio includes carbon capture, blue and green hydrogen, sustainable aviation fuels, low-carbon ammonia and selected nuclear engineering work. The company combines technology licensing and early-stage engineering with selective EPC delivery; its transition businesses sit alongside a substantial LNG and hydrocarbons franchise.

Euronext Paris

$6.0B

Hydrogen & Industrial Process EPC
SOLV Energy
MWH $5.7B 🇺🇸 United States Renewables & Power Generation EPC NASDAQ
SOLV Energy
HQ: 🇺🇸 United States Segment: Renewables & Power Generation EPC

SOLV Energy, Inc. is a US contractor focused on utility-scale solar, battery storage and the grid infrastructure needed to connect and operate those assets. It provides engineering, procurement and construction, plant commissioning, operations and maintenance, and performance services for large renewable-power projects. Acquisitions have expanded the platform into high-voltage transmission, substations, testing and commissioning. The business began as Swinerton Renewable Energy, became independent in 2021, combined with CS Energy in 2024 and completed its Nasdaq IPO in 2026. This produces a focused renewable-construction and services business with both project-based EPC revenue and a recurring operations-and-maintenance portfolio.

NASDAQ

$5.7B

Renewables & Power Generation EPC
Balfour Beatty
BBY.L $5.6B 🇬🇧 United Kingdom Diversified International EPC LSE
Balfour Beatty
HQ: 🇬🇧 United Kingdom Segment: Diversified International EPC

Balfour Beatty plc is a diversified infrastructure and construction group operating mainly in the United Kingdom, United States and Hong Kong. Its energy-transition work includes electricity transmission and distribution programmes for UK network operators, major civil packages at Hinkley Point C and Sizewell C, and construction for the Net Zero Teesside carbon-capture power project. The wider group builds highways, railways, airports, public buildings, housing and US commercial projects and also manages an infrastructure-investments portfolio. The result is a broad contractor and infrastructure investor with important UK grid and nuclear positions, rather than a company focused primarily on energy.

LSE

$5.6B

Diversified International EPC
DEME Group
DEME.BR $5.3B 🇧🇪 Belgium Offshore Wind & Marine Construction Euronext Brussels
DEME Group
HQ: 🇧🇪 Belgium Segment: Offshore Wind & Marine Construction

DEME Group NV is a Belgian marine engineering contractor organised around Offshore Energy, Dredging & Infra, Environmental and Concessions. Offshore Energy transports and installs offshore-wind foundations and turbines, lays subsea power cables and supports other marine energy infrastructure using a specialised vessel fleet. Dredging & Infra undertakes port development, coastal protection, land reclamation and marine civil works, while Environmental treats contaminated soil and sediments and Concessions develops selected infrastructure and renewable projects. The acquisition of Havfram expanded DEME's wind-turbine installation fleet. Offshore wind is a core business within a larger global dredging and marine-infrastructure contractor.

Euronext Brussels

$5.3B

Offshore Wind & Marine Construction
MYR Group
MYRG $4.8B 🇺🇸 United States Grid & Electrical Infrastructure NASDAQ
MYR Group
HQ: 🇺🇸 United States Segment: Grid & Electrical Infrastructure

MYR Group Inc. is a North American electrical contractor operating through Transmission & Distribution and Commercial & Industrial. T&D builds and maintains high-voltage transmission lines, substations, distribution networks and related utility infrastructure, including emergency restoration and grid connections for new generation. C&I provides electrical construction for data centres, healthcare, manufacturing, transportation and other large facilities and also performs electrical scope on renewable-energy projects. The company's acquisition strategy has expanded both platforms, including the addition of Valley Electric and Comet Electric to C&I. The group therefore combines direct grid exposure with a substantial non-utility buildings and industrial electrical business.

NASDAQ

$4.8B

Grid & Electrical Infrastructure
Primoris Services Corporation
PRIM $4.2B 🇺🇸 United States Grid & Electrical Infrastructure Renewables & Power Generation EPC NYSE
Primoris Services Corporation
HQ: 🇺🇸 United States Segment: Grid & Electrical Infrastructure Renewables & Power Generation EPC

Primoris Services Corporation is a US specialty contractor operating through Utilities and Energy. Its renewable business provides engineering, procurement and construction for utility-scale solar and battery-storage projects, while power-delivery teams build and maintain electric transmission, distribution and substation infrastructure. Utilities also includes natural-gas distribution and communications work; Energy also covers gas-fired generation, pipelines, industrial construction and heavy civil projects. Primoris therefore combines large renewable and grid-construction businesses with substantial conventional-energy and industrial exposure. Large fixed-price renewable projects also expose the company to contract-execution and cost-overrun risk.

NYSE

$4.2B

Grid & Electrical Infrastructure Renewables & Power Generation EPC
Kalpataru Projects International
KPIL.NS $2.5B 🇮🇳 India Grid & Electrical Infrastructure NSE
Kalpataru Projects International
HQ: 🇮🇳 India Segment: Grid & Electrical Infrastructure

Kalpataru Projects International Limited is an Indian engineering and construction group whose largest business builds electricity transmission lines, substations and underground cabling in India and international markets. It supports this work with in-house transmission-tower manufacturing and local operating subsidiaries in markets including Europe, the Middle East and Latin America. The rest of the group builds commercial and industrial facilities, water and irrigation systems, oil and gas pipelines, railways and urban infrastructure. The company was known as Kalpataru Power Transmission until 2023; the new name reflects the broader EPC portfolio. Grid infrastructure is the largest business, but the company remains a diversified international contractor.

NSE

$2.5B

Grid & Electrical Infrastructure
Cadeler
CDLR $2.5B 🇩🇰 Denmark Offshore Wind & Marine Construction NYSE
Cadeler
HQ: 🇩🇰 Denmark Segment: Offshore Wind & Marine Construction

Cadeler A/S is a Denmark-based offshore-wind installation contractor listed in New York and Oslo. Its jack-up vessels transport and install wind turbines and foundations, and the company is expanding into full-scope foundation transport and installation and offshore-wind operations and maintenance. The fleet has grown through newbuild deliveries and the completed combination with Eneti, while the acquisition of Menck added offshore-foundation installation equipment and engineering. Cadeler has no material business outside offshore wind, so its activity depends on vessel utilisation, project schedules, turbine and foundation size, and developers reaching final investment decisions.

NYSE

$2.5B

Offshore Wind & Marine Construction
Aecon Group
ARE.TO $2.3B 🇨🇦 Canada Nuclear Engineering & Construction TSX
Aecon Group
HQ: 🇨🇦 Canada Segment: Nuclear Engineering & Construction

Aecon Group Inc. is a Canadian construction and concessions company. Its nuclear business works on CANDU refurbishment and life-extension programmes, decommissioning and new-build projects, including the Darlington BWRX-300 small modular reactor alliance. The Utilities business builds electric transmission and distribution infrastructure but also serves gas and telecommunications networks. Aecon's wider Construction operations cover transit, roads, bridges, industrial facilities and other civil infrastructure, while Concessions develops and operates selected infrastructure assets. Aecon is therefore a diversified Canadian contractor with a distinctive nuclear capability, not a nuclear pure play.

TSX

$2.3B

Nuclear Engineering & Construction
Ameresco
AMRC $1.2B 🇺🇸 United States Renewables & Power Generation EPC NYSE
Ameresco
HQ: 🇺🇸 United States Segment: Renewables & Power Generation EPC

Ameresco, Inc. is a US energy-services company serving government, institutional, utility, industrial and commercial customers. Its Projects business designs and builds energy-efficiency upgrades, distributed solar, battery storage, microgrids and other power infrastructure, including behind-the-meter systems for large energy users. Energy Assets owns and operates solar, storage, biogas and other generation projects, while Operations & Maintenance provides recurring services across company-owned and customer assets. The Neogenyx joint venture houses the biogas business, with Ameresco retaining control. This contractor-asset-owner model combines project-development and construction revenue with recurring service income and balance-sheet exposure to owned assets.

NYSE

$1.2B

Renewables & Power Generation EPC
KEC International
KEC.NS $1.2B 🇮🇳 India Grid & Electrical Infrastructure NSE
KEC International
HQ: 🇮🇳 India Segment: Grid & Electrical Infrastructure

KEC International Limited is the infrastructure EPC arm of the RPG Group and an established builder of electricity transmission and distribution systems. It constructs overhead lines, substations and underground cables in India and international markets and supports the business with in-house transmission-tower manufacturing through SAE Towers in the Americas. The wider group undertakes civil and urban-infrastructure projects, railways, renewable-energy work and oil and gas pipelines and manufactures power and telecommunications cables. Grid infrastructure remains the dominant business within a diversified EPC and manufacturing group exposed to both Indian and international capital spending.

NSE

$1.2B

Grid & Electrical Infrastructure
Sterling and Wilson Renewable Energy
SWSOLAR.NS $487M 🇮🇳 India Renewables & Power Generation EPC NSE
Sterling and Wilson Renewable Energy
HQ: 🇮🇳 India Segment: Renewables & Power Generation EPC

Sterling and Wilson Renewable Energy Limited is an Indian engineering, procurement and construction contractor focused on utility-scale solar, hybrid renewable and battery-storage projects. It provides project design, equipment procurement, construction, commissioning and operations and maintenance in India and selected international markets. The company's operating scope is concentrated in renewable generation and storage rather than conventional power or general civil construction. It is a focused renewable EPC business whose results depend on project awards, execution, working capital and the timing and risk allocation of large construction contracts.

NSE

$487M

Renewables & Power Generation EPC
Disclaimer: Green Stocks Research publishes independent research for informational and educational purposes only. Nothing on this page is investment advice, a recommendation, or an offer to buy or sell any security — always do your own due diligence and consider consulting a licensed financial adviser before investing. Market-capitalization figures are refreshed on a regular cadence from publicly available exchange data and may lag real-time prices; see our methodology for how this list is compiled and maintained. Green Stocks Research has no financial relationship with any company listed. Have a suggestion — an addition, removal, or correction? Email us at feedback@greenstocksresearch.com.

Clean Energy EPC Stocks — Investor FAQ

Clean energy EPC stocks are listed engineering, procurement and construction companies and specialty contractors that build energy transition infrastructure: utility-scale solar and wind farms, battery storage, transmission lines and substations, nuclear plants and refurbishments, offshore wind installation, and hydrogen, carbon capture and renewable fuels facilities. They earn construction, engineering and services revenue from the build-out itself, so their results track capital spending on the electricity system more than the price of any single commodity or generation technology. Work that does not build that system is excluded from the exposure test: gas-fired generation, gas distribution, LNG, pipelines, data center construction and non-energy civil work.
EPC stands for engineering, procurement and construction. An EPC contractor takes a project from design through equipment purchasing to completed construction under one contract, delivering a finished asset to the owner. It is the standard delivery model for power plants and large energy infrastructure worldwide.
The most direct listed utility-scale solar builders on this list are SOLV Energy, a US solar, storage and grid infrastructure contractor, Sterling and Wilson Renewable Energy, an Indian solar EPC with international projects, and Primoris Services, one of the largest US solar constructors. MasTec also builds utility-scale wind, solar and battery-storage projects within its Clean Energy and Infrastructure segment.
Offshore wind construction is dominated by marine contractors with specialized vessel fleets. On this list, DEME Group and Cadeler install the foundations and the turbines. Several of the largest offshore wind builders are deliberately not on this list, because oil and gas leads their revenue and that places them below this list's exposure threshold: Saipem and Subsea 7, which agreed in 2025 to merge into a single offshore contractor called Saipem7, and Aker Solutions, which builds the offshore substations and converter platforms that bring the power ashore. Their vessels and yards still do a large share of the world's offshore wind installation work, so they are worth following even though the exposure test keeps them off the list.
Nuclear construction and engineering on this list spans AtkinsRéalis, the CANDU original-equipment manufacturer, steward and exclusive commercial licensee supporting refurbishment and new-build work; Aecon Group, a major Canadian nuclear construction contractor; Hyundai Engineering & Construction, the builder of Korea's APR1400 fleet and the UAE's Barakah plant; and Balfour Beatty, a major civils contractor on the UK's Hinkley Point C. The Government of Canada retains ownership of the CANDU intellectual property through Atomic Energy of Canada Limited. Fluor was for years the majority investor in SMR developer NuScale, but completed the sale of that stake in April 2026 and is not on this list.
Contract risk. A fixed-price lump-sum contract obliges the contractor to absorb cost overruns, and on large complex projects overruns have historically wiped out years of profit and, in extreme cases, destroyed companies. Investors typically check what share of a contractor's backlog is fixed-price versus cost-reimbursable, how large any single project is relative to the company, and the contractor's track record of execution. Labor availability, project timing and client concentration are the other recurring risks.
Not for the purposes of this list. Data center electrical, mechanical and site contractors such as EMCOR, Comfort Systems USA, IES Holdings and Sterling Infrastructure are riding the same electricity demand growth that drives grid investment, but they build no clean generation and no grid: their work is the building, its cooling and its internal power distribution, downstream of everything this list tracks. They were removed in August 2026 when the inclusion criteria were tightened, together with Hochtief and ACS Group, whose stated energy transition exposure was also the data center build-out rather than power or grid construction. Contractors that do data center work alongside genuine grid or generation work can stay on the list — Quanta Services and MYR Group are included for their transmission, distribution and generation-construction businesses, while data center work sits alongside that exposure. The distinction is between building the electricity system and building the things that consume its output.
A developer originates and owns projects: it secures land, permits, grid connection and financing, and profits from selling electricity or selling the completed project. An EPC contractor is hired by the developer to build the asset and profits from construction margins. Developers carry power price and asset ownership risk; contractors carry execution and contract risk. Some large groups do both, and the companies on this list earn their revenue primarily from building and engineering rather than from owning assets, with each company entry noting where a group does both.
This list applies a two-part test. First, the work has to qualify: building clean generation (solar, wind, storage, nuclear), building or upgrading the grid, or engineering clean fuels and industrial decarbonization. Gas does not qualify in any form, so gas-fired power plants, gas distribution networks, LNG plants and pipelines are all excluded from the calculation, as are data center and building construction, oil and gas field development, highways, rail, housing, communications and government services. Second, that qualifying work has to be material: broadly a quarter of revenue or backlog is the floor for inclusion, companies where it is roughly three quarters or more are marked Pure-play, and everything between is Diversified. A small number of companies sit below the floor and are still listed as Minor exposure, because they occupy a position nothing else on the list covers, such as licensing the technology behind clean ammonia plants or carrying a national nuclear export programme. Note that the yardstick is electricity infrastructure rather than renewables specifically: a transmission contractor earns the same margin whichever generation technology it connects, so measuring these companies against a renewables-only revenue share would misrepresent what they actually do. Inclusion describes business exposure, not a judgement on investment quality or future returns.

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Key Terms
Full Glossary →

EPC (engineering, procurement and construction) is the contracting model under which a single firm designs a project, buys its equipment and materials, and builds it, handing the client a completed asset. EPC contractors carry delivery risk in exchange for project margins, and their revenue visibility comes from backlog: signed contracts not yet executed. Variants include EPCM, where the contractor manages construction performed by others, and EPCI, which adds offshore installation.
A lump-sum turnkey contract commits an EPC contractor to deliver a completed project for a fixed price. The client gets cost certainty; the contractor keeps any savings but absorbs any overrun, which makes bidding discipline and execution the difference between strong margins and losses. Several large contractors have exited or restricted lump-sum bidding after costly overruns, and investors typically examine what share of a contractor's backlog is fixed-price versus reimbursable.
A cost-reimbursable (or cost-plus) contract pays the contractor its actual costs plus an agreed fee or margin. It shifts cost overrun risk to the project owner, which lowers the contractor's risk profile at the price of a thinner, capped margin. Much recurring grid and utility work is performed under reimbursable or unit-price master service agreements, which is one reason specialty grid contractors tend to show steadier earnings than lump-sum plant builders.
A wind turbine installation vessel is a specialized jack-up ship that transports offshore wind turbine components and installs them at sea, standing on legs lowered to the seabed to create a stable lifting platform. Each new turbine generation, with taller towers and heavier nacelles, requires larger cranes and decks, so modern WTIVs cost several hundred million dollars each and the global fleet is small. Vessel availability and day rates are a key bottleneck for offshore wind construction timelines.
Nuclear new build refers to the construction of new reactors, as distinct from refurbishing or extending the life of existing plants. New build is among the most demanding work in construction: projects run for a decade or more, regulatory oversight is continuous, and cost overruns on first-of-a-kind designs have been common. For contractors, new build offers very large, multi-year backlogs, while refurbishment programs on existing fleets offer lower-risk, repeatable work; several companies on this list do both.
Grid interconnection is the physical and contractual process of connecting a new generation or storage project to the transmission network, including the substation, switchyard and network upgrades required. Interconnection has become one of the main bottlenecks for renewable deployment in the US and Europe, with projects waiting years for grid connection approvals. For contractors, every completed interconnection is billable scope, and the backlog of connection requests is a forward indicator of grid construction demand.
A substation is the node where the grid changes voltage: transformers step power up for long-distance transmission or down for distribution, surrounded by switchgear, protection and control equipment. Every new generation project, data center and grid reinforcement needs new or expanded substation capacity, making substation engineering and construction one of the steadiest workstreams for electrical contractors as electricity demand and renewable connections grow.

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