# Top 30 energy companies in Kolkata

Tamtam tracks 34 energy companies headquartered in Kolkata. This list ranks the 30 largest by number of employees on LinkedIn, led by RP Sanjiv Goenka Group, Coal India Limited and Exide Industries Limited. Their median headcount is 1,136. Half of them were founded in 1985 or later.

These Kolkata-based companies operate primarily in the energy sector, including mining, power generation, and specialized chemical manufacturing. The firms listed range from established conglomerates to mid-sized companies, with a notable presence of organizations founded from the mid-20th century onwards.

RP Sanjiv Goenka Group is a diverse conglomerate with interests in power and energy. Coal India Limited is a state-owned coal mining corporate, while Exide Industries Limited specializes in lead-acid storage batteries. Vikram Solar manufactures solar modules, and CESC Limited generates and distributes power.

🇮🇳 Kolkata · 30 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [RP Sanjiv Goenka Group](https://www.tamtam.ai/c/rp-sanjiv-goenka-group) (rpsg.in)<br>A rapidly expanding conglomerate with diverse holdings in power, energy, manufacturing, retail, IT services, FMCG, media, entertainment, and agriculture sectors | Consumer Services | 🇮🇳 Kolkata | 36,571 | 1820 |
| 2 | [Coal India Limited](https://www.tamtam.ai/c/coal-india-limited-kolkata) (coalindia.nic.in)<br>A state-owned coal mining corporate in India, leading in production and supply to meet the country's energy needs efficiently and competitively | Mining | 🇮🇳 Kolkata | 8,152 | 1975 |
| 3 | [Exide Industries Limited](https://www.tamtam.ai/c/exide-industries-limited) (exideindustries.com)<br>A leading brand in India for over 70 years, specializing in manufacturing a wide range of lead-acid storage batteries for various industries globally | Manufacturing | 🇮🇳 Kolkata | 7,296 | 1947 |
| 4 | [Rashmi Group](https://www.tamtam.ai/c/rashmi-group) (rashmigroup.com)<br>A fast-growing group with expertise in manufacturing ductile iron pipe, steel, cement, dredging, laptops, and mobile devices, with a turnover of around 450 million USD | Mining | 🇮🇳 Kolkata | 3,059 | 1966 |
| 5 | [CESC Limited](https://www.tamtam.ai/c/cesc-limited) (cesc.co.in)<br>A pioneer in electricity supply since 1899, this organization generates and distributes power, serves 15 million people, and is expanding with new power stations | Utilities | 🇮🇳 Kolkata | 2,760 |  |
| 6 | [Coal India Limited](https://www.tamtam.ai/c/coal-india-limited-90357974) (coalindia.in)<br>A leading state-owned coal mining corporation in India with the largest coal production in the world and diverse subsidiary operations | Mining | 🇮🇳 Kolkata | 2,498 | 1975 |
| 7 | [Vikram Solar](https://www.tamtam.ai/c/vikram-solar) (vikramsolar.com)<br>A leading solar module manufacturer and integrated energy solutions provider, offering EPC and O&M services globally with a focus on high efficiency PV modules | Industrial Machinery Manufacturing | 🇮🇳 Kolkata | 2,081 | 2006 |
| 8 | [Haldia Petrochemicals Ltd](https://www.tamtam.ai/c/haldia-petrochemicals-ltd) (haldiapetrochemicals.com)<br>An integrated petrochemical complex in Eastern India producing polymers and chemicals with a focus on quality, safety and environmental considerations for global supply | Oil and Gas | 🇮🇳 Kolkata | 1,841 | 1985 |
| 9 | [Emami Agrotech Limited](https://www.tamtam.ai/c/emami-agrotech-limited) (emamiagrotech.in)<br>A Kolkata-based organization in Edible Oil industry with diverse business interests including Specialty Fats, Spices and Bio-diesel production and distribution | Food and Beverage Services | 🇮🇳 Kolkata | 1,595 | 2002 |
| 10 | [JMS MINING PVT LTD](https://www.tamtam.ai/c/jms-mining-pvt-ltd) (jmsmining.com)<br>Industry leader in implementing Mass Production Technology in underground coal mining Services include mine planning, operations, equipment management, and EHS management following global norms | Mining | 🇮🇳 Kolkata | 1,545 | 2011 |
| 11 | [Damodar Valley Corporation](https://www.tamtam.ai/c/damodar-valley-corporation-kolkata) (dvc.gov.in)<br>A multipurpose integrated river valley project focusing on flood control, irrigation, water supply, navigation, energy generation, afforestation, and public well-being in the region | Industrial Machinery Manufacturing | 🇮🇳 Kolkata | 1,539 | 1948 |
| 12 | [Linde India Limited](https://www.tamtam.ai/c/linde-india-limited) (linde.in)<br>Leading industrial gases company in India, owning and operating the largest air separation plant with over 20 production facilities and filling stations nationwide | Chemicals | 🇮🇳 Kolkata | 1,293 |  |
| 13 | [The West Bengal Power Development Corporation Limited (WBPDCL)](https://www.tamtam.ai/c/the-west-bengal-power-development-corporation-limited-wbpdcl) (wbpdcl.co.in)<br>A state-owned power generation company in West Bengal, India, meeting 60% of state's power demands with a focus on quality, efficiency, and eco-friendly operations | Utilities | 🇮🇳 Kolkata | 1,279 | 1985 |
| 14 | [Balrampur Chini Mills Limited](https://www.tamtam.ai/c/balrampur-chini-mills-limited) (chini.com)<br>A leading Indian company in sugar production, bio-ethanol, and renewable energy, known for sustainability, efficiency, corporate citizenship, and rural prosperity | Agricultural Chemical Manufacturing | 🇮🇳 Kolkata | 1,144 | 1975 |
| 15 | [Himadri Speciality Chemical Ltd.](https://www.tamtam.ai/c/himadri-speciality-chemical-ltd) (himadri.com)<br>Leading specialty chemical company specializing in carbon products, with a focus on innovation, R&D, and vertical integration to cater to global industry needs | Chemical Manufacturing | 🇮🇳 Kolkata | 1,136 | 1987 |
| 16 | [Rashmi Metaliks Limited](https://www.tamtam.ai/c/rashmi-metaliks-limited) (rashmigroup.com)<br>Integrated steel manufacturing facility producing a wide range of steel products, including Pellet, Sinter, Pig Iron, Sponge Iron, Ductile Iron Pipe, and more, with quality and environmental certifications | Wholesale Building Materials | 🇮🇳 Kolkata | 878 |  |
| 17 | [LUMINO INDUSTRIES LIMITED](https://www.tamtam.ai/c/lumino-industries-limited) (luminoindustries.com)<br>Manufacturer of overhead transmission line conductors and AB cables, also offering Engineering Procurement Construction services for last-mile electricity distribution in India | Electrical Equipment Manufacturing | 🇮🇳 Kolkata | 838 | 1989 |
| 18 | [Coal India Limited](https://www.tamtam.ai/c/coal-india-limited) (coalindia.in)<br>A state-owned coal mining corporation in India, CIL is the largest coal producer globally with multiple subsidiaries and training institutes | Mining | 🇮🇳 Kolkata | 836 | 1975 |
| 19 | [Veedol](https://www.tamtam.ai/c/veedol) (veedolindia.com)<br>Leading manufacturer and marketer of quality lubricants in India, catering to automotive and industrial segments with a range of high performance engine oils, gear oils, transmission oils, and greases | Oil and Gas | 🇮🇳 Kolkata | 776 | 1928 |
| 20 | [Techno Electric & Engineering Co. Ltd.](https://www.tamtam.ai/c/techno-electric-and-engineering-co-ltd) (techno.co.in)<br>Established in 1963, the company specializes in power generation, transmission, distribution, EPC projects, and is expanding into the data center industry | Construction | 🇮🇳 Kolkata | 744 | 1963 |
| 21 | [West Bengal State Electricity Distribution Company Limited](https://www.tamtam.ai/c/west-bengal-state-electricity-distribution-company-limited) (wbsedcl.in)<br>A Vidyut Bhavan-based organization in Kolkata, India, responsible for distributing electricity in West Bengal State | Utilities | 🇮🇳 Kolkata | 705 | 2007 |
| 22 | [West Bengal State Electricity Transmission Company Limited (WBSETCL)](https://www.tamtam.ai/c/west-bengal-state-electricity-transmission-company-limited-wbsetcl) (wbsetcl.in)<br>A government enterprise in West Bengal established in 2007, responsible for transmitting power through substations of various voltage levels and frequently awarded in power sector | Utilities | 🇮🇳 Kolkata | 691 | 2007 |
| 23 | [Laser Power & Infra Limited](https://www.tamtam.ai/c/laser-power-and-infra-limited) (laserpowerinfra.com)<br>A leading manufacturer of cables and conductors with over 25 years of experience, offering a wide range of products for various industries | Appliances, Electrical, and Electronics Manufacturing | 🇮🇳 Kolkata | 631 | 1988 |
| 24 | [Jupiter International Limited](https://www.tamtam.ai/c/jupiter-international-limited) (jil-jupiter.com)<br>India-based solar power solutions company manufacturing high quality poly-crystalline solar cells with global standards Committed to quality, efficiency, and aggressive expansion in the industry | Renewable Energy Semiconductor Manufacturing | 🇮🇳 Kolkata | 543 | 1978 |
| 25 | [Bengal Energy Limited](https://www.tamtam.ai/c/bengal-energy-limited) (bengalenergy.co.in)<br>The company operates a manufacturing facility producing high-quality coke for blast furnaces, trading in minerals/commodities, and generating power for sale | Mining | 🇮🇳 Kolkata | 515 | 2007 |
| 26 | [Essel Mining and Industries Limited](https://www.tamtam.ai/c/essel-mining-and-industries-limited) (esselmining.com)<br>A diversified natural resource company in India, operating in coal mining, iron pellets, and Noble Ferro Alloys, with a focus on green energy and stakeholder value creation | Mining | 🇮🇳 Kolkata | 485 | 1950 |
| 27 | [Damodar Valley Corporation](https://www.tamtam.ai/c/damodar-valley-corporation) (dvc.gov.in)<br>A multipurpose river valley project in India engaged in power generation, transmission, water resources management, and socio-economic development, focusing on renewable energy | Utilities | 🇮🇳 Kolkata | 482 | 1948 |
| 28 | [Jupiter Wagons Limited](https://www.tamtam.ai/c/jupiter-wagons-limited) (jupiterwagons.com)<br>A leading manufacturer in India of railway wagons, passenger coaches, components, and castings, recognized worldwide for their advanced transportation equipment | Railroad Equipment Manufacturing | 🇮🇳 Kolkata | 455 | 2006 |
| 29 | [GARUDA POWER PRIVATE LIMITED](https://www.tamtam.ai/c/garuda-power-private-limited) (garudapower.com)<br>Specializing in machinery and electrical/mechanical service solutions, we are a channel partner for leading brands across Eastern India | Machinery Manufacturing | 🇮🇳 Kolkata | 423 | 2009 |
| 30 | [Websol Energy System Limited](https://www.tamtam.ai/c/websol-energy-system-limited) (webelsolar.com)<br>A leading manufacturer in India of high-quality photovoltaic monocrystalline solar cells and modules for various applications since 1994 | Renewable Energy Power Generation | 🇮🇳 Kolkata | 407 | 1994 |

## 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 12, 2026.

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## The same list elsewhere in India

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