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.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
RP Sanjiv Goenka Grouprpsg.in
A rapidly expanding conglomerate with diverse holdings in power, energy, manufacturing, retail, IT services, FMCG, media, entertainment, and agriculture sectors |
36,571 | |||
| 2 |
Coal India Limitedcoalindia.nic.in
A state-owned coal mining corporate in India, leading in production and supply to meet the country's energy needs efficiently and competitively |
8,152 | |||
| 3 |
Exide Industries Limitedexideindustries.com
A leading brand in India for over 70 years, specializing in manufacturing a wide range of lead-acid storage batteries for various industries globally |
7,296 | |||
| 4 |
Rashmi Grouprashmigroup.com
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 |
3,059 | |||
| 5 |
CESC Limitedcesc.co.in
A pioneer in electricity supply since 1899, this organization generates and distributes power, serves 15 million people, and is expanding with new power stations |
2,760 | |||
| 6 |
Coal India Limitedcoalindia.in
A leading state-owned coal mining corporation in India with the largest coal production in the world and diverse subsidiary operations |
2,498 | |||
| 7 |
Vikram Solarvikramsolar.com
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 |
2,081 | |||
| 8 |
Haldia Petrochemicals Ltdhaldiapetrochemicals.com
An integrated petrochemical complex in Eastern India producing polymers and chemicals with a focus on quality, safety and environmental considerations for global supply |
1,841 | |||
| 9 |
Emami Agrotech Limitedemamiagrotech.in
A Kolkata-based organization in Edible Oil industry with diverse business interests including Specialty Fats, Spices and Bio-diesel production and distribution |
1,595 | |||
| 10 |
JMS MINING PVT LTDjmsmining.com
Industry leader in implementing Mass Production Technology in underground coal mining Services include mine planning, operations, equipment management, and EHS management following global norms |
1,545 | |||
| 11 |
Damodar Valley Corporationdvc.gov.in
A multipurpose integrated river valley project focusing on flood control, irrigation, water supply, navigation, energy generation, afforestation, and public well-being in the region |
1,539 | |||
| 12 |
Linde India Limitedlinde.in
Leading industrial gases company in India, owning and operating the largest air separation plant with over 20 production facilities and filling stations nationwide |
1,293 | |||
| 13 |
The West Bengal Power Development Corporation Limited (WBPDCL)wbpdcl.co.in
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 |
1,279 | |||
| 14 |
Balrampur Chini Mills Limitedchini.com
A leading Indian company in sugar production, bio-ethanol, and renewable energy, known for sustainability, efficiency, corporate citizenship, and rural prosperity |
1,144 | |||
| 15 |
Himadri Speciality Chemical Ltd.himadri.com
Leading specialty chemical company specializing in carbon products, with a focus on innovation, R&D, and vertical integration to cater to global industry needs |
1,136 | |||
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| 16 |
Rashmi Metaliks Limitedrashmigroup.com
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 |
878 | |||
| 17 |
LUMINO INDUSTRIES LIMITEDluminoindustries.com
Manufacturer of overhead transmission line conductors and AB cables, also offering Engineering Procurement Construction services for last-mile electricity distribution in India |
838 | |||
| 18 |
Coal India Limitedcoalindia.in
A state-owned coal mining corporation in India, CIL is the largest coal producer globally with multiple subsidiaries and training institutes |
836 | |||
| 19 |
Veedolveedolindia.com
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 |
776 | |||
| 20 |
Techno Electric & Engineering Co. Ltd.techno.co.in
Established in 1963, the company specializes in power generation, transmission, distribution, EPC projects, and is expanding into the data center industry |
744 | |||
| 21 |
West Bengal State Electricity Distribution Company Limitedwbsedcl.in
A Vidyut Bhavan-based organization in Kolkata, India, responsible for distributing electricity in West Bengal State |
705 | |||
| 22 |
West Bengal State Electricity Transmission Company Limited (WBSETCL)wbsetcl.in
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 |
691 | |||
| 23 |
Laser Power & Infra Limitedlaserpowerinfra.com
A leading manufacturer of cables and conductors with over 25 years of experience, offering a wide range of products for various industries |
631 | |||
| 24 |
Jupiter International Limitedjil-jupiter.com
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 |
543 | |||
| 25 |
Bengal Energy Limitedbengalenergy.co.in
The company operates a manufacturing facility producing high-quality coke for blast furnaces, trading in minerals/commodities, and generating power for sale |
515 | |||
| 26 |
Essel Mining and Industries Limitedesselmining.com
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 |
485 | |||
| 27 |
Damodar Valley Corporationdvc.gov.in
A multipurpose river valley project in India engaged in power generation, transmission, water resources management, and socio-economic development, focusing on renewable energy |
482 | |||
| 28 |
Jupiter Wagons Limitedjupiterwagons.com
A leading manufacturer in India of railway wagons, passenger coaches, components, and castings, recognized worldwide for their advanced transportation equipment |
455 | |||
| 29 |
GARUDA POWER PRIVATE LIMITEDgarudapower.com
Specializing in machinery and electrical/mechanical service solutions, we are a channel partner for leading brands across Eastern India |
423 | |||
| 30 |
Websol Energy System Limitedwebelsolar.com
A leading manufacturer in India of high-quality photovoltaic monocrystalline solar cells and modules for various applications since 1994 |
407 | |||
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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.
More company lists in Kolkata
- The largest companies in Kolkata 594
- Manufacturers in Kolkata 115
- Multinational companies in Kolkata 66
- Education providers in Kolkata 65
- Publicly traded companies in Kolkata 55
- Retail chains in Kolkata 53
- Corporate groups and holding companies in Kolkata 49
- IT Services and IT Consulting companies in Kolkata 46
- Critical infrastructure operators in Kolkata 45
- Financial services firms in Kolkata 44
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- Financial Services companies in Kolkata 36
- Public sector organisations in Kolkata 34
- IT services companies in Kolkata 33
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- Education Administration Programs companies in Kolkata 27
- Higher Education companies in Kolkata 27
- Hospitals and Health Care companies in Kolkata 27
- Consumer goods companies in Kolkata 26
- Chemical companies in Kolkata 25
The same list elsewhere in India
- Energy companies in India 631
- Energy companies in Maharashtra 154
- Energy companies in Gujarat 64
- Energy companies in Haryana 51
- Energy companies in Tamil Nadu 49
- Energy companies in Uttar Pradesh 45
- Energy companies in Karnataka 44
- Energy companies in West Bengal 36
- Energy companies in Rajasthan 25
- Energy companies in Mumbai 92
- Energy companies in New Delhi 72
- Energy companies in Gurugram 44
- Energy companies in Chennai 38
- Energy companies in Bengaluru 35
- Energy companies in Ahmedabad 33
- Energy companies in Pune 31
- Energy companies in Noida 28