| # | Company | Employees |
|---|---|---|
| 1 |
Mahindra Groupmahindra.com
Leading multinational federation with businesses in farm equipment, vehicles, IT, finance, renewable energy, agriculture, logistics, hospitality, and real estate. |
237,131 |
| 2 |
Reliance Industries Limitedril.com
Company's activities span hydrocarbon exploration and production, petroleum refining, petrochemicals, retail, and telecommunications. Committed to innovation-led, exponential growth. |
200,730 |
| 3 |
Larsen & Toubrolarsentoubro.com
Multinational company specializing in engineering, procurement, construction projects, hi-tech manufacturing, and sustainability-focused services across over 50 countries worldwide. |
142,350 |
| 4 |
Aditya Birla Groupadityabirla.com
An innovative global conglomerate offering a wide range of products and services, focused on responsible business practices and stakeholder value creation |
82,509 |
| 5 | 41,996 | |
| 6 |
Indian Oil Corp Limitediocl.com
Leading energy company specializing in oil refining, distribution, and marketing, ranked among the world's largest corporations globally. |
41,695 |
| 7 |
RPG Grouprpggroup.com
A diversified business group with a turnover of over US$ 44 billion, operating in infrastructure, automotive, IT, pharmaceuticals, energy, and plantations |
40,984 |
| 8 |
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 |
| 9 |
Murugappa Groupmurugappa.com
Conglomerate with businesses in agriculture, engineering, financial services, manufacturing abrasives, ceramics, electric vehicles, auto components, fertilizers, sugar, tea, and more. |
33,648 |
| 10 |
Indian Oil Corporation Limited
A national oil company in India involved in the entire hydrocarbon value chain, including refining, transportation, marketing, exploration, production, and petrochemicals |
29,849 |
| 11 |
NTPC Limitedntpc.co.in
India's largest power generation utility, operating across fossil fuels, hydro, nuclear, and renewable energy sources, with a diversified portfolio including consultancy and training services |
26,494 |
| 12 | 24,342 | |
| 13 |
Bharat Petroleum Corporation Limitedbharatpetroleum.in
Refining crude oil, marketing petroleum products, with significant presence in upstream and downstream oil and gas sectors, targeting net-zero by 2040. |
23,037 |
| 14 |
Bharat Heavy Electricals Limitedbhel.com
A leading engineering and manufacturing enterprise specializing in power equipment, serving various sectors globally with a focus on sustainable business solutions and nation building initiatives |
21,861 |
| 15 |
Adani Groupadani.com
Diversified infrastructure group with transport logistics and energy utilities, focusing on large-scale development and sustainable growth across India. |
21,480 |
| 16 |
Jindal Steel & Power Ltd.jindalsteel.in
A leading integrated steel manufacturer producing economical steel and power, with a diverse product portfolio, technological leadership, and global recognition for growth |
21,000 |
| 17 |
Godrej & Boyce Mfg. Co. Ltd.godrejandboyce.com
A trusted brand offering diverse products and services, including locks, consumer goods, furniture, precision manufacturing, aerospace, and infrastructure development, with a focus on meaningful work |
19,330 |
| 18 |
GMR Groupgmrgroup.in
operates airports, generates energy, develops urban infrastructure, manages transportation, and owns sports teams, all while committing to community development. |
18,287 |
| 19 |
Oil and Natural Gas Corporation Ltdongcindia.com
Largest Indian crude oil, natural gas producer. Integrated energy company with exploration, production, refining, petrochemicals, renewables, and global oil and gas properties. |
16,674 |
| 20 |
Reliance Jio Infocom Limitedril.com
Specializing in petroleum refining, marketing, textiles, and infotel services, the company offers a diverse range of products and solutions |
14,067 |
| 21 |
KEC International Ltd.kecrpg.com
Designs, manufactures, supplies, and constructs turnkey projects for power transmission, railways, civil infrastructure, and renewable energy globally. |
13,775 |
| 22 |
TATA Powertatapower.com
One of India's largest power companies, with a focus on sustainable energy generation, transmission, distribution, and clean energy solutions for consumers |
13,591 |
| 23 |
Megha Engineering and Infrastructures Ltd (MEIL)meil.in
Diverse industrial conglomerate specializing in engineering, construction, water management, power, hydrocarbons, manufacturing, transportation, and defense infrastructure projects worldwide. |
13,436 |
| 24 | 10,548 | |
| 25 |
Shree Cement Ltd.shreecement.com
A leading cement group in India with a focus on sustainable growth and innovation, recognized for operational excellence and industry accolades |
10,150 |
| 26 |
L&T Hydrocarbon Engineering Limitedlntenergy.com
Provides integrated engineering, procurement, fabrication, construction, and project management solutions for large, complex offshore and onshore hydrocarbon projects worldwide. |
9,890 |
| 27 |
Suzlon Groupsuzlon.com
Leading renewable energy solutions provider globally, operating in 17 countries, dedicated to powering a greener tomorrow |
9,546 |
| 28 |
JBM Groupjbmgroup.com
A global conglomerate with expertise in automotive, electric vehicles, renewable energy, and AI, supplying innovative products to leading OEMs |
9,296 |
| 29 |
GAIL (India) Limitedgailonline.com
Largest natural gas company in India with operations in transmission, marketing, processing, LPG, petrochemicals, city gas, and exploration. |
9,153 |
| 30 |
Ola Electricolaelectric.com
Innovating sustainable mobility solutions to accelerate the world's transition towards a greener future Join the revolution today! |
8,711 |
| 31 |
Shapoorji Pallonji Groupshapoorjipallonji.com
A global organization providing end-to-end solutions in engineering, construction, infrastructure, real estate, water, energy, and financial services with a focus on sustainability and safety |
8,209 |
| 32 |
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 |
| 33 |
KALPATARU PROJECTS INTERNATIONAL LIMITEDkalpataruprojects.com
Leading global engineering, construction company. Diversified portfolio in power, buildings, water, railways, oil, urban mobility, highways, airports. Sustainable development commitment, environmental goals. |
7,847 |
| 34 |
Adani Poweradanipower.com
A leading thermal power producer in India with a total capacity of 12,410 MW, utilizing technology and innovation to ensure affordable electricity for all |
7,434 |
| 35 |
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 |
| 36 |
Welspun Worldwelspun.com
A rapidly growing conglomerate with diverse businesses in line pipes, home textiles, oil and gas, steel, and more across 50 countries Prioritizes customer centricity, innovation, and employee empowerment |
6,956 |
| 37 |
Power Grid Corporation of India Limitedpowergrid.in
A major player in power transmission, operating under Ministry of Power, managing assets and implementing projects to enhance power generation capacity |
6,764 |
| 38 |
Uttar Pradesh Power Corporation ( Uppcl )uppcl.org
This company is responsible for electricity transmission and distribution within the Indian state of Uttar Pradesh |
6,429 |
| 39 |
Polycab India Limitedpolycab.com
Leading electrical solutions provider in India, focused on innovation for a brighter, greener, and well-designed future Connecting ideas for a sustainable tomorrow |
5,869 |
| 40 | 5,692 | |
| 41 |
Adani Solaradanisolar.com
Large-scale solar module and cell manufacturer building a fully integrated ecosystem from polysilicon to modules, including India's only ingot and wafer facility. |
5,573 |
| 42 |
Vedanta Aluminium Metal Limitedvedantaaluminium.com
India's leading producer of aluminum and value-added products, driving innovation in key industries for a greener future with global technology |
5,522 |
| 43 |
Isgec Heavy Engineering Ltd.isgec.com
A diversified heavy engineering company offering manufacturing and EPC projects, specializing in process equipment, boilers, industrial plants, and civil construction globally |
5,339 |
| 44 |
CG Power and Industrial Solutions Limitedcgglobal.com
Global leader in managing and applying electrical energy with products and services for utilities, power generation, and industries worldwide |
5,243 |
| 45 |
Sterling and Wilsonsterlingandwilson.com
A multinational EPC solutions provider operating in 30 countries, specializing in Data Centers, Renewable Energy, MEP-IEPC, Transmission & Distribution, and more |
5,241 |
| 46 |
Bharat Forge Ltdbharatforge.com
A technology-driven global leader in metal forming, manufacturing critical components for automotive, power, aerospace, and other sectors worldwide |
5,209 |
| 47 |
Nayara Energynayaraenergy.com
International energy company with strong presence in hydrocarbon value chain, from refining and production to marketing and retail of oil and petroleum products. |
5,107 |
| 48 |
Indian Oil Corporation Limited (Iocl)iocl.com
A state-owned oil and gas company in India with headquarters in New Delhi and a registered office in Mumbai |
4,926 |
| 49 |
Kirloskar Oil Engines Limitedkirloskaroilengines.com
A leading manufacturer of diesel engines, generator sets, agricultural solutions, and fire fighting engines with a global presence in over 50 countries |
4,631 |
| 50 |
Ather Energyatherenergy.com
Ather Energy pioneers smart electric scooters, charging infrastructure, and ownership plans, merging clean design, engineering, and a complete EV ecosystem |
4,309 |
| 51 |
BARCbarc.gov.in
A leading nuclear research center in India, specializing in advanced research in nuclear science, engineering, and related areas for NPCIL |
3,987 |
| 52 |
JSW Energy Ltdjswenergy.in
Leading private sector power producer focused on efficient resource utilization, social and economic benefits, minimal environmental impacts, and innovative growth |
3,927 |
| 53 |
HPCL-Mittal Energy Limitedhmel.in
Operates an integrated refinery-petrochemical complex in Punjab producing polyethylene, polypropylene, and petroleum products while managing a thousand kilometer crude oil pipeline network. |
3,925 |
| 54 |
Securesecuremeters.com
Specializing in energy efficiency and power management solutions, we help users reduce waste, save money, and embrace a sustainable lifestyle globally |
3,905 |
| 55 |
Adani Enterprises Limitedadanienterprises.com
Flagship of a large Indian business group involved in building infrastructure businesses and divesting them successfully, contributing to nation-building and shareholder value |
3,871 |
| 56 |
Genus Power Infrastructures Ltdgenuspower.com
A leading provider of smart energy meters, power distribution projects, and hybrid microcircuits globally, focused on affordable advanced technology solutions |
3,803 |
| 57 |
Megha Engineering & Infrastructures Ltdmeil.in
Specializing in EPC services for irrigation, water, hydrocarbon, and power projects, along with manufacturing Spiral Welded Steel and Fibre Glass Reinforced Plastic pipes |
3,751 |
| 58 |
DCM Shriram LTDdcmshriram.com
A diversified conglomerate with business interests in agriculture, chemicals, and value-added products, led by a professional executive team |
3,679 |
| 59 | 3,642 | |
| 60 |
NHPC Limitednhpcindia.com
An Indian organization established in 1975 focused on developing and promoting hydropower generation for efficient integrated development |
3,638 |
| 61 | 3,524 | |
| 62 |
Tata Power Renewable Energy Limitedtatapowersolar.com
Renewable utility capacity developer managing solar, wind, and storage projects alongside cell manufacturing, rooftop installations, water pumps, and electric vehicle charging infrastructure. |
3,385 |
| 63 |
Oil & Natural Gas Corporation Limited (Ongc)ongcindia.com
Leading Indian company in crude oil and natural gas production, supplying significant portion of domestic market Raw material for downstream petroleum production |
3,382 |
| 64 |
Cairn Vedanta Oil and Gasvedantaoilandgas.com
A leading oil and gas exploration and production company in India, contributing significantly to the country's domestic crude oil production and energy security |
3,342 |
| 65 |
Bajaj Groupbajajgroup.org
The company operates in the Sugar, Ethanol, Power, and FMCG industries while also engaging in philanthropic efforts to create self-reliant villages |
3,316 |
| 66 |
Premier Energies Limitedpremierenergies.com
A leading solar energy company with a LEED Gold-rated manufacturing facility offering end-to-end solutions, EPC services, and sustainable practices globally |
3,298 |
| 67 |
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 |
| 68 |
Oil and Natural Gas Corporation Limited (ONGC)ongcindia.com
A leading Indian government-owned oil and gas explorer and producer, responsible for a significant portion of India's domestic production |
3,040 |
| 69 |
ACME Groupacme.in
A global leader in sustainable and renewable energy solutions, specializing in large-scale solar power projects and pioneering Green Hydrogen and Ammonia technology |
3,028 |
| 70 |
Punjab State Power Corporation Ltdpspcl.in
The company provides electricity generation, transmission, and distribution services to Punjab, India, ensuring reliable power supply to residents and businesses |
3,011 |
| 71 |
Siemenssiemens.com
A German conglomerate specializing in industrial manufacturing, healthcare, energy, and infrastructure It is a leading maker of medical diagnostics equipment |
2,880 |
| 72 |
Lauritz Knudsen Electrical & Automationlk-ea.com
Market leader in providing electrical distribution, monitoring, and control solutions in low voltage category, including switchgear, motor starters, automation, energy management, and modernization solutions |
2,855 |
| 73 |
APAR Industries Limitedapar.com
A global supplier of conductors, cables, oils, polymers, and lubricants, focusing on innovation, efficiency, and sustainability to solve real-world challenges |
2,804 |
| 74 |
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 |
| 75 |
Jindal Power Limitedjindalpower.com
Leading Indian power company with diverse energy portfolio, focusing on thermal and renewable sources to meet nation's power demands through cutting-edge technologies and best practices |
2,760 |
| 76 |
K Raheja Corpkrahejacorp.com
Leading developer in India with expertise in commercial and residential real estate, hospitality, retail, malls, and sustainable development, creating innovative and environmentally-friendly spaces |
2,753 |
| 77 |
Triveni Engineering & Industries Limitedtrivenigroup.com
Leading Indian conglomerate specializing in sugar, ethanol, power transmission, water treatment, and FMCG brands Committed to excellence, innovation, and sustainable growth |
2,722 |
| 78 |
Jain Irrigation Systems Ltd.jains.com
A multinational company manufacturing irrigation systems, piping, renewable energy solutions, financial services, and agricultural inputs worldwide for over 38 years |
2,713 |
| 79 |
Waaree Groupwaaree.com
Global leader in solar energy solutions with a 12 GW manufacturing facility, delivering premium solar modules worldwide and offering diverse solar products & services |
2,649 |
| 80 | 2,616 | |
| 81 |
Praj Industriespraj.net
A leading process solutions company specializing in bio-energy, water solutions, zero liquid discharge, critical process equipment, and brewery plants, with a focus on sustainability |
2,565 |
| 82 |
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 |
| 83 |
SolarSquaresolarsquare.in
India's leading residential solar provider, offering trust, transparency, financing, and top-notch after-sales service to help homeowners switch to solar energy |
2,493 |
| 84 |
BSES Delhibsesdelhi.com
Delhi-based power distribution entities serving over 28 lakh customers in two thirds of the city, with separate coverage areas and customer bases |
2,404 |
| 85 |
Greaves Cotton Limitedgreavescotton.com
A diversified engineering company with over 163 years of legacy, specializing in fuel agnostic powertrain solutions, e-mobility, aftermarket & retail, and sustainable technologies |
2,397 |
| 86 |
Maharashtra State Electricity Distribution Co (Msedcl)mahadiscom.in
Mahavitaran is a public sector electricity distribution company in Maharashtra, India, controlled by the state government It is the largest utility in India |
2,351 |
| 87 |
ZETWERKzetwerk.com
Universal manufacturing network utilizing new-age technology to streamline production, reduce costs, and optimize suppliers for high-quality, globally competitive manufacturing solutions |
2,324 |
| 88 |
Avaada Groupavaada.com
A visionary energy conglomerate involved in solar modules production, renewable power generation, and large scale projects for green hydrogen and sustainable fuels |
2,295 |
| 89 |
Goldi Solar Pvt. Ltd.goldisolar.com
Manufacturing high efficiency solar PV modules with 15.2 GW capacity across AI-powered Indian facilities while expanding into solar cell production for global sustainability. |
2,171 |
| 90 |
Electrotherm (India) Limitedelectrotherm.com
Specializes in designing and manufacturing furnaces, refining equipment, casting machines, and plant automation for the steel industry while focusing on innovation and customer-centric solutions |
2,156 |
| 91 |
BGR Energy Systemsbgrcorp.com
Provides end-to-end utility industry solutions including product manufacturing and turnkey EPC contracts for complete power plant projects. |
2,145 |
| 92 |
Tata Power-DDLtatapower-ddl.com
Delivering electricity and implementing power distribution reforms, including smart metering and solar projects, while empowering underprivileged communities through social initiatives |
2,131 |
| 93 |
Feedback INFRAfeedbackinfra.com
Leading infrastructure services provider offering consulting, engineering, project management, operations, EPC services in transportation, energy, urban infrastructure across India and internationally |
2,128 |
| 94 |
Eastman Auto & Power Limitedeaplworld.com
An innovative power industry leader offering energy storage, solar solutions, and EV products with a strong global presence and focus on sustainability and teamwork |
2,100 |
| 95 |
JAKSON Groupjakson.com
A pioneering energy and infrastructure organization focused on sustainable solutions, including distributed energy, solar module manufacturing, green energy, and biofuels |
2,095 |
| 96 |
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 |
| 97 |
Luminous Power Technologies (P) Ltdluminousindia.com
Leading energy solutions provider in India, offering cutting-edge solar systems, inverters, and batteries to illuminate homes and businesses for progress and improved lives 馃尀鈿★笍 |
2,065 |
| 98 |
Transrail Lighting Limitedtransrail.in
An integrated provider of power transmission, distribution, rural electrification, and outdoor lighting solutions, driven by passion for quality and innovation |
2,041 |
| 99 |
Delta Electronics Indiadeltaelectronicsindia.com
A leading Power and Energy management company in India, specializing in Power Electronics, Automation, Infrastructure, Telecom Power Solutions, and Display Solutions |
2,011 |
| 100 |
Microtek International Pvt Ltd.microtek.in
A technology innovator in the power back-up industry, specializing in reliable and latest technology products for household and industrial consumers globally |
1,935 |
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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 Oct 24, 2026.
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