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Oil And Gas Companies in Cardiff: 26 Active Firms (2026)
Oil and gas companies in Cardiff provide upstream, services and distribution capabilities for energy customers across the metropolitan area.
Purchasing tends to sit with energy procurement, operations, engineering and compliance teams rather than with a single central buyer. The Cardiff cohort serves a mix of industrial sites, marine customers, infrastructure operators and commercial energy users, with work often packaged as maintenance, specialist supply, downstream logistics or project support. Engagements are usually contract-led rather than transactional: buyers want evidence of site access, safety processes, equipment capability and continuity of supply. Smaller operators tend to win defined work packages, while larger local employers are better placed for multi-site support and longer operating agreements across South Wales and wider UK markets.
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Cardiff has 26 actively trading oil and gas companies, making this a compact local market rather than a broad regional cluster. Reported employment across the cohort totals 413 people, which points to a mix of owner-managed specialists and a small number of more operationally scaled employers. The commercial centre of gravity appears to be services, distribution and engineering support for energy users, rather than a deep concentration of upstream producers. That shape fits Cardiff’s metropolitan base: close enough to ports, industrial estates and infrastructure customers to support field work, but not large enough to behave like a national oil and gas hub.
Operating requirements sit around safety, environmental controls, contractor assurance, fuel handling and transport obligations. Cardiff suppliers serving industrial, marine or infrastructure customers tend to face buyer-led compliance checks before regulation becomes a formal market story: site induction, method statements, insurance, waste handling and evidence of trained staff often determine whether a supplier can work. Downstream and service activities also expose firms to price sensitivity and procurement cycles outside their control. That makes local reputation, availability and documented operating discipline more important than broad market messaging, particularly where work takes place on customer sites or around safety-critical assets.
Cardiff’s oil and gas base appears more service-led than asset-led, so the direction of travel is likely to depend on maintenance demand, industrial energy use and the willingness of customers to retain local suppliers for specialist work. The cohort tends to favour practical operators over venture-style scaling stories. Some firms may broaden into adjacent energy services where existing engineering, logistics or compliance capabilities transfer, but that shift is likely to be uneven. Consolidation pressure may come from procurement rather than finance: buyers prefer fewer approved contractors, clearer accountability and suppliers that can document safe delivery across repeat work.
26
Active firms
2026
2
Above £5M
reported revenue
4
Newer firms
incorporated since 2022
Key facts
About 7% of the trading cohort reports turnover above £5M (2 of 26 firms) — the rest sits below that revenue band.
15% of the cohort was incorporated since 2022 (4 firms), so a sizeable share is in its first few filing cycles.
Cardiff’s oil and gas base is weighted towards service, distribution and operational support for energy customers across the metropolitan area.
The segment appears less like a pure exploration cluster and more like an industrial supply-chain market for fuel supply, logistics and maintenance work.
Upstream, services and distribution activity sit alongside each other, so buyer needs range from operational support to energy supply and maintenance.
Top Cardiff Oil And Gas companies
Avantis Group
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsProvides engineering, project management, and installation services for maintenance, upgrade, and life‑extension of industrial and marine assets. Activities include design, prefabrication, mechanical…
Serves B2B asset owners and operators in marine transportation, offshore oil and gas, power generation, renewables, industrial and utilities sectors with critical infrastructure and asset…
Financial Health
StableStable · Hiring · 21% CAGR over 1y
Location
Jemsar Engineering Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides engineering maintenance and support services for the oil and gas industry, including heat exchanger servicing and repair, bundle pulling, on-site machining, technical bolting, pipework and…
Sells to oil and gas industry businesses needing engineering support for projects, maintenance, shutdowns and turnarounds, including large industrial operators and plant teams managing heat…
Financial Health
HealthyHealthy · -10% CAGR over 2y
Location
CHINOOK ENERGY EUROPE LTD
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides geological and drilling consulting services to energy companies, including wellsite geology supervision, geosteering, reservoir evaluation, mudlogging, petrography, geochemistry, drilling…
Serves B2B energy and resources operators, primarily oil and gas companies, plus geothermal, lithium extraction and solution mining projects across Canada, the US, Europe, South America, Africa and…
Financial Health
WeakWeak · 0% CAGR over 2y
Location
MG INSULATION LTD
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides marine cryogenic insulation services for LNG, LPG and LEG carriers, including installation, repair and maintenance for new builds, conversions and voyage repairs. Also supplies servicing and…
Serves B2B marine and offshore customers, including shipyards, vessel owners and fleet managers operating LNG, LEG and LPG carriers, FSU, FSRU and FLNG assets worldwide.
Financial Health
StableStable · Hiring · 9% CAGR over 4y
Location
WAYNE GEOLOGICAL LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
DistressedDistressed
Location
PSFM SERVICES LTD
Trajectory
1y · 2024–NowFinancial Health
Insufficient historyInsufficient history
Location
HyHaul Mobility Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
DistressedDistressed
Location
Sutro Group Ltd
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsProvides infrastructure inspection services using rope access, drones, robotics and non-destructive testing. Conducts asset integrity assessments for water utilities, oil and gas, power generation,…
Serves B2B asset owners and operators in water utilities, oil and gas, power generation and renewables, particularly teams responsible for critical infrastructure, industrial facilities and…
Financial Health
StrongStrong · Growing, Hiring · 11% CAGR over 4y
Location
TOWER COLLIERY LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsSupplies heating oil (kerosene), premium kerosene fuels and gas oil/red diesel for domestic and commercial use. Also sells solid fuels, smokeless briquettes, kiln‑dried logs, firelighting products,…
Sells to households and commercial customers needing heating oil, diesel, gas oil, smokeless fuel and firewood, including rural properties with access constraints, plus agricultural and other…
Financial Health
WeakWeak
Location
Western Forecourt Services Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides servicing, maintenance and installation of fuel pumps and forecourt equipment. Supplies refurbished petrol and diesel pumps, spare parts and tank gauge systems, and carries out calibration,…
Serves independent petrol forecourt operators, haulage firms, bulk fuel suppliers, pump manufacturers and local authorities across South and West Wales and the South of England.
Financial Health
HealthyHealthy · Hiring · 19% CAGR over 4y
Location
TECHNIVAC LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides catalyst and molecular sieve changeout services for refineries and petrochemical plants, including reactor loading, unloading and repackaging. Develops and uses specialised handling…
Serves B2B operators and maintenance teams in the oil, gas and petrochemical sectors, including onshore and offshore facilities requiring shutdown support across Europe and other international…
Financial Health
HealthyHealthy · -3% CAGR over 2y
Location
GRANGE INDUSTRIES GROUP LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides electrical, control and instrumentation (EC&I) engineering services for hazardous-area industrial sites, including system design, installation, ATEX inspections, maintenance, and…
Serves industrial businesses and engineering project teams operating hazardous-area assets, particularly in downstream gas, petrochemical and power station sectors, including clients and partners on…
Financial Health
WeakWeak · Hiring · 3% CAGR over 4y
Location
NEMEIN GROUP LTD.
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures thermal and vibration management equipment and sensing technologies for downhole drilling tools. Provides systems for power generation, imaging and data telemetry in deep…
Serves B2B energy and drilling organisations working in harsh downhole environments, including geothermal borehole developers, drilling contractors and operators managing deep, hot boreholes.
Financial Health
StableStable
Location
HUB PETROLEUM LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StableStable · -1% CAGR over 4y
Location
GLOBAL MARITIME ENGINEERING SERVICES LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides engineering, project management and supervision services for maritime and offshore sectors, including vessel maintenance, repair, installations and retrofits. Also delivers ship outfitting…
Serves B2B clients in maritime, offshore and industrial sectors, including shipowners and operators, cruise industry teams, and companies in manufacturing, construction and energy needing project…
Financial Health
StrongStrong · Profitable, Growing, Hiring · 233% CAGR over 2y
Location
Wales & West Utilities
Operates and manages a gas distribution network, maintaining pipelines that deliver natural gas to homes and businesses. Provides gas connections, network upgrades, emergency response for gas leaks,…
Serves households, businesses, developers, vulnerable customers and third-party utility providers across Wales and south west England that rely on the regional gas network.
Location
INTELLIGENT PROJECT DESIGN SERVICES LTD
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides project engineering and design services including process, mechanical, civil/structural and electrical, instrumentation and control design. Also offers project management, CDM coordination,…
Serves engineering and project teams at businesses in chemical, oil and gas, energy and power, petrochemical, pharmaceutical, nuclear, food and beverage, and building services industries needing…
Financial Health
StrongStrong
Location
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides engineering, procurement and construction (EPC) services for industrial and energy infrastructure projects, including midstream terminals, chemicals and refining, pulp and paper, power,…
Serves B2B industrial asset owners and operators needing EPC delivery, including midstream, terminal, chemicals, refining, pulp and paper, energy transition, advanced recycling, power and marine…
Financial Health
WeakWeak · 0% CAGR over 5y
Location
HENRY MORRIS (1958) LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsSupplies and distributes fuel products including home heating oil, diesel, gas oil and red diesel, along with lubricants, AdBlue and fuel storage tanks. Provides online and telephone ordering with…
Sells to households needing home heating oil and business customers buying diesel, gas oil, red diesel, lubricants, tanks and AdBlue, with coverage across the UK and Ireland.
Financial Health
StableStable · -29% CAGR over 4y
Location
Gary Mcinulty Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
HealthyHealthy · Growing · 0% CAGR over 4y
Location
Landtech Geophysics Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides passive seismic tomography surveys and geophysical services for resource exploration and reservoir monitoring. Develops and deploys seismometers, digitizers and telemetry systems, and offers…
Serves energy and natural resources companies, especially oil and gas operators, geothermal developers, coal and lignite explorers, and reservoir/fracking teams needing geophysical survey support.
Financial Health
HealthyHealthy · Hiring · 11% CAGR over 4y
Location
RP HYDRO SURVEY CONSULTANTS LTD
Trajectory
4y · 2021–NowFinancial sub-scores
Computed from 4 filingsFinancial Health
StableStable · -68% CAGR over 4y
Location
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How Cardiff Oil And Gas companies work and how to sell to them
What they do
Cardiff oil and gas firms usually earn through contract services, distribution margin, equipment supply and project support rather than a pure product sale. Field work is often priced by call-out, day rate, quoted work package or retained maintenance agreement, with materials, transport and specialist labour passed through separately. Fuel and consumables businesses tend to work on recurring supply arrangements, while engineering and safety specialists sell scoped jobs with inspection, documentation and handover built in. Cash flow can be lumpy because mobilisation, customer approval and invoicing milestones sit around site schedules rather than a simple monthly subscription model.
Who they sell to
Buyers are usually operational rather than purely corporate: site managers, engineering leads, energy procurement teams, compliance managers, marine operators and facilities directors. Smaller jobs may be won through local relationships and approved-contractor lists; larger engagements tend to involve tender packs, insurance checks, safety evidence and procurement sign-off. The cycle can be short when a customer needs a fault fixed or fuel delivered, but months when access to a framework, port site or industrial facility is involved. Most suppliers need to reassure both the budget holder and the person accountable for safe delivery.
What they buy
Most Cardiff oil and gas suppliers tend to spend on tools that keep field operations visible and auditable: job scheduling, asset maintenance, document control, compliance tracking, estimating, fleet management and finance systems. Sales and account-management software can matter where repeat industrial accounts drive revenue, but operational administration is often the sharper pain. They also buy insurance, legal support, training, health and safety advice, environmental services, recruitment for engineers and drivers, calibration, vehicle support, cloud hosting and basic cyber security. Anything that reduces duplicated paperwork between office, depot and customer site is easier to explain.
Why and how to sell to them
Buying intent often appears when a firm wins a new maintenance agreement, adds engineers, takes on more site-based work, renews insurance, prepares for a customer audit or tries to get onto an approved supplier list. Cardiff operators may be wary of abstract productivity claims, so outreach usually lands better when it is tied to fewer failed visits, cleaner compliance evidence, faster quotations, safer handovers or fewer invoice disputes. The useful sales angle is practical risk reduction: show how the offer helps them keep customers supplied, satisfy site requirements and avoid tying senior operators up in administration.
How this list is built
Data sources
This list is built from UK Companies House filings, XBRL accounts data, and semantic analysis of each company's public website. Revenue and headcount figures come from the most recent filed accounts; where the company has not filed, values are estimated using a model trained on filed history and peer benchmarks and are labelled as estimates.
Classification
Rather than relying solely on SIC codes, Firmbase classifies each company semantically: the company's website is crawled, an AI model reads what the company actually sells, and the company is placed into the relevant industry and subsectors. SIC codes are used as one signal but not the only one. This means a company that registered under a generic SIC code but pivoted into (for example) fintech is correctly identified as fintech, not as its original SIC category.
Freshness
The underlying company data is refreshed from Companies House continuously; filings appear in the list within days of submission. The curated list ordering is regenerated when the underlying data moves meaningfully (company count changes by more than 5%, a new company enters the top-ranked segment, or the filed-revenue numbers for the top firms change). You can see the last-updated timestamp near the top of the page.
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