# The 30 largest energy companies in Beijing

Tamtam tracks 30 energy companies headquartered in Beijing. This list ranks all of them by number of employees on LinkedIn, led by SANY Group, China Petroleum Engineering & Construction Corporation (CPECC) and Sinopec International Petroleum Service Corporation. Their median headcount is 480. Half of them were founded in 2000 or later.

The energy sector in Beijing is dominated by large state-owned enterprises, with a strong focus on oil and gas, as well as broader utilities and engineering services. Companies like China Petroleum Engineering & Construction Corporation (CPECC) and Sinopec International Petroleum Service Corporation are prominent in oil and gas, providing comprehensive services for the entire lifecycle of operations. SANY Group, though in machinery manufacturing, also plays a significant role with its global presence. State Grid Corporation of China focuses on online services and solutions in the energy sector. There is also a notable presence of renewable energy firms, such as Hanergy Mobile Energy Holding Group, specializing in thin-film solar power.

Many of these companies, such as COSL - China Oilfield Services Limited and CGGC Intl. of Energy China, have extensive experience, with foundations dating back to the mid-20th century, indicating a mature industry landscape. While oil and gas and traditional utilities form a core, there's also an emerging interest in renewable energy and green development, as seen with CWE (China International Water & Electric Corp.) focusing on hydropower and new energy projects.

🇨🇳 Beijing · 30 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [SANY Group](https://www.tamtam.ai/c/sany-group) (sanyglobal.com)<br>A global company founded in 1989, specializing in manufacturing machinery for various industries, with a strong presence in over 180 countries worldwide | Machinery Manufacturing | 🇨🇳 Beijing | 6,983 |  |
| 2 | [China Petroleum Engineering & Construction Corporation (CPECC)](https://www.tamtam.ai/c/china-petroleum-engineering-and-construction-corporation-cpecc) (cpecc.cn)<br>Provides comprehensive engineering, procurement, and construction services for oil and gas projects globally, including facilities, refineries, and storage. | Oil and Gas | 🇨🇳 Beijing | 5,774 | 1980 |
| 3 | [Sinopec International Petroleum Service Corporation](https://www.tamtam.ai/c/sinopec-international-petroleum-service-corporation) (ssc.sinopec.com)<br>A leading petroleum engineering service company in China providing comprehensive services for the entire lifecycle of oil and gas field operations internationally | Oil and Gas | 🇨🇳 Beijing | 3,015 | 2013 |
| 4 | [国家电网有限公司](https://www.tamtam.ai/c/company-32610134) (sgcc.com.cn)<br>A utilities company based in Beijing, China, providing essential services in the energy sector | Utilities | 🇨🇳 Beijing | 2,160 |  |
| 5 | [State Grid Corporation of China](https://www.tamtam.ai/c/state-grid-corporation-of-china-beijing) (sgcc.com.cn)<br>An internet company based in Beijing, China that is focused on providing online services and solutions to users | Technology, Information and Internet | 🇨🇳 Beijing | 2,121 | 2002 |
| 6 | [China Energy Engineering Group Co. Ltd.](https://www.tamtam.ai/c/china-energy-engineering-group-co-ltd) (ceec.net.cn)<br>A leading global solutions provider in the power industry, offering comprehensive services from survey and design to project management | Oil and Gas | 🇨🇳 Beijing | 1,989 | 2014 |
| 7 | [CGGC Intl. of Energy China](https://www.tamtam.ai/c/cggc-intl-of-energy-china) (en.gzbgj.ceec.net.cn)<br>A leading Chinese developer and EPC provider specializing in large-scale infrastructure projects, renewable energy, and supporting China's Belt and Road Initiative | Civil Engineering | 🇨🇳 Beijing | 1,757 | 1970 |
| 8 | [COSL - China Oilfield Services Limited](https://www.tamtam.ai/c/cosl-china-oilfield-services-limited) (cosl.com.cn)<br>An integrated oilfield service provider with over 50 years of experience offering geophysical, drilling, well, marine, and transportation services globally | Oil and Gas | 🇨🇳 Beijing | 1,602 | 1955 |
| 9 | [CWE (China International Water & Electric Corp.)](https://www.tamtam.ai/c/cwe-china-international-water-and-electric-corp) (english.cwe.cn)<br>An international engineering enterprise specializing in water, hydropower, new energy, and infrastructure projects worldwide with a focus on green development and quality services | Construction | 🇨🇳 Beijing | 1,067 | 1983 |
| 10 | [Hanergy Mobile Energy Holding Group](https://www.tamtam.ai/c/hanergy-mobile-energy-holding-group) (hanergy.com)<br>Global provider of thin-film solar power, specializing in hydropower, wind energy, high-end equipment manufacturing, PV module production, and research into high-efficiency conversion technologies. | Renewable Energy Semiconductor Manufacturing | 🇨🇳 Beijing | 812 | 1989 |
| 11 | [China Petroleum & Chemical Co., Ltd.](https://www.tamtam.ai/c/china-petroleum-and-chemical-co-ltd) (sinopec.com)<br>A mining & metals company based in Beijing, offering opportunities for representatives to build relationships, attract followers, and connect with potential customers, brand fans, and employees | Mining | 🇨🇳 Beijing | 624 |  |
| 12 | [Tesla China 特斯拉中国](https://www.tamtam.ai/c/tesla-china) (tesla.cn)<br>A global leader in luxury electric vehicles, focusing on sustainable transportation through innovative technology, zero emissions, advanced safety, performance, and charging solutions | Motor Vehicle Manufacturing | 🇨🇳 Beijing | 616 | 2003 |
| 13 | [Datang International Power Generation Co., Ltd.](https://www.tamtam.ai/c/datang-international-power-generation-co-ltd) (dtpower.com)<br>A China-based electrical and electronic manufacturing company specializing in power generation solutions | Appliances, Electrical, and Electronics Manufacturing | 🇨🇳 Beijing | 538 |  |
| 14 | [国家能源投资集团有限责任公司](https://www.tamtam.ai/c/company-29964562) (ceic.com)<br>A leading state-owned enterprise in China, focusing on coal, thermal power, new energy, hydropower, transportation, chemicals, environmental technology, finance, with extensive global presence | Oil and Gas | 🇨🇳 Beijing | 483 | 2017 |
| 15 | [Veolia Energy](https://www.tamtam.ai/c/veolia-energy) (veolia.cn)<br>This company promotes a low-carbon circular economy by providing sustainable energy sources, efficient consumption, and waste-to-resource solutions for industries | Renewable Energy Semiconductor Manufacturing | 🇨🇳 Beijing | 480 |  |
| 16 | [Antonoil IFMS](https://www.tamtam.ai/c/antonoil-ifms) (antonoil.com)<br>Leading global oilfield technology service provider, offering innovative solutions for oil and gas development worldwide, focused on maximizing asset value and promoting social progress | Oil and Gas | 🇨🇳 Beijing | 468 | 1999 |
| 17 | [Elion Resources Group Co., Ltd.](https://www.tamtam.ai/c/elion-resources-group-co-ltd) (elion.com.cn)<br>A leading group established in 1988, specializing in ecological restoration from deserts to cities, emphasizing clean energy and finance industries | Renewable Energy Semiconductor Manufacturing | 🇨🇳 Beijing | 468 | 1988 |
| 18 | [CGGC-UNPOWER Co., Ltd.](https://www.tamtam.ai/c/cggc-unpower-co-ltd) (cggc-unpower.net)<br>Integrated service provider for various distributed energy solutions and key equipment, specializing in power solutions for gas, solar, wind, storage, marine, and more | Architecture and Planning | 🇨🇳 Beijing | 448 | 2014 |
| 19 | [中国核电工程有限公司](https://www.tamtam.ai/c/company-29626066) (cnpe.cc)<br>A civil engineering company based in Beijing, China specializing in nuclear power projects | Civil Engineering | 🇨🇳 Beijing | 438 |  |
| 20 | [无](https://www.tamtam.ai/c/company-13451604) (mercusuar.uzone.id)<br>A global leader in green and smart energy solutions, providing integrated services in PV, wind power, power electronics, energy internet, and power station construction | Renewables & Environment | 🇨🇳 Beijing | 405 | 2000 |
| 21 | [Sinovel Wind Group Co., Ltd](https://www.tamtam.ai/c/sinovel-wind-group-co-ltd) (sinovel.com)<br>A leading Chinese company specializing in designing, manufacturing, and marketing multi-megawatt wind turbines for various environments, offering competitive pricing and continuous R&D | Renewable Energy Semiconductor Manufacturing | 🇨🇳 Beijing | 391 |  |
| 22 | [Aramco Asia](https://www.tamtam.ai/c/aramco-asia) (aramco.com)<br>Representing Saudi Aramco in Asia-Pacific region, providing various services such as marketing intelligence, joint venture coordination, procurement, and public affairs & communications | Oil and Gas | 🇨🇳 Beijing | 391 |  |
| 23 | [中国寰球工程公司](https://www.tamtam.ai/c/company-6664188) (hqcec.cnpc.com.cn)<br>An international engineering company under China Petroleum & Natural Gas Group providing end-to-end services for project construction in various industries | Oil and Gas | 🇨🇳 Beijing | 370 |  |
| 24 | [Sinoma Science & Technology Co., Ltd.](https://www.tamtam.ai/c/sinoma-science-and-technology-co-ltd) (sinomatech.com)<br>A Beijing-based computer software company specializing in technology solutions and services | Software Development | 🇨🇳 Beijing | 336 |  |
| 25 | [安东石油技术(集团)有限公司](https://www.tamtam.ai/c/company-32946750) (antonoil.com)<br>A China-based company specializing in information technology and services, located in Beijing, focused on the oil and gas sector | IT Services and IT Consulting | 🇨🇳 Beijing | 314 |  |
| 26 | [Great Wall Drilling Company Limited](https://www.tamtam.ai/c/great-wall-drilling-company-limited)<br>An electrical/electronic manufacturing company based in Beijing, China, specializing in drilling services | Appliances, Electrical, and Electronics Manufacturing | 🇨🇳 Beijing | 213 |  |
| 27 | [Gd Power Development Co., Ltd](https://www.tamtam.ai/c/gd-power-development-co-ltd) (600795.com.cn)<br>An electrical and electronic manufacturing company located in Beijing, China, specializing in power development and related technologies | Appliances, Electrical, and Electronics Manufacturing | 🇨🇳 Beijing | 190 |  |
| 28 | [Creative Distribution Automation Co., Ltd](https://www.tamtam.ai/c/creative-distribution-automation-co-ltd) (creat-da.com.cn)<br>A high-tech enterprise providing advanced technology, products, and services for the energy industry, focusing on green clean energy solutions and national electricity reform policies | Appliances, Electrical, and Electronics Manufacturing | 🇨🇳 Beijing | 182 | 1988 |
| 29 | [DAELIM BELEFIC Group](https://www.tamtam.ai/c/daelim-belefic-group) (daelimtransformer.com)<br>Manufacturer of CSA, ANSI/IEEE, cUL, and UL-listed transformers Specializing in customized solutions for utility, data centers, renewable energy, and other industries | Machinery Manufacturing | 🇨🇳 Beijing | 69 | 2010 |
| 30 | [Beijing CEI Technology Co., Ltd.](https://www.tamtam.ai/c/beijing-cei-technology-co-ltd) (bjzdfy.com.cn)<br>The company specializes in water electrolysis hydrogen/oxygen generator design, production, and related hydrogen energy solutions with strategic partnerships and extensive experience | Industrial Machinery Manufacturing | 🇨🇳 Beijing | 6 |  |

## How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 11, 2026.

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## The same list elsewhere in China

- [Energy companies in China](https://www.tamtam.ai/l/energy-companies-china) (183)
- [Energy companies in Guangdong](https://www.tamtam.ai/l/energy-companies-guangdong) (33)

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Source: https://www.tamtam.ai/l/energy-companies-beijing