This selection of public sector organizations in Tamil Nadu largely comprises government-owned banks and higher education institutions. Many of these are large, well-established entities. Indian Bank, founded in 1907, provides diverse financial services, while the Indian Institute of Technology, Madras, established in 1959, focuses on technological education and research. Other prominent organizations include Anna University Chennai, offering higher education in engineering, and United India Insurance Co. Ltd., a government-owned general insurance company.
A significant pattern is the concentration of headquarters in Chennai, indicating it as a primary hub for public sector operations in the region. The list also shows a strong emphasis on education and financial services, with several institutions dedicated to each sector. For instance, Tamil Nadu Agricultural University in Coimbatore focuses on agricultural degree programs, and the High Court of Madras, established in 1862, serves as a key legal institution.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Indian Bankindianbank.bank.in
Offers diverse financial services including deposits, loans, cards, and remittances across India and internationally, serving various customer segments. |
16,376 | |||
| 2 |
Indian Institute of Technology, Madrasiitm.ac.in
An institute of national importance offering higher technological education, research, and consultancy services with a focus on engineering and pure sciences |
9,505 | |||
| 3 |
INDIAN OVERSEAS BANKiob.bank.in
Government-backed public sector bank providing financial services with majority ownership from the Government of India |
7,711 | |||
| 4 |
Anna University Chennaiannauniv.edu
Higher education in engineering, technology, architecture, applied sciences with focus on research and industry-academia collaboration for societal needs. |
7,705 | |||
| 5 |
invalid15094330annauniv.edu
An educational institution offering higher education in engineering, technology, and allied sciences, promoting research, and fostering cooperation between academia and industry |
3,330 | |||
| 6 |
Tamil Nadu Agricultural Universitytnau.ac.in
The organization is an agricultural university offering various degree programs in agriculture, horticulture, forestry, and home science since 1971 |
2,704 | |||
| 7 | 
High Court of Madrastn.nic.in
A historic high court in Tamil Nadu, India, established in 1862 under Queen Victoria's Letters patent, serving as a key legal institution |
2,268 | |||
| 8 |
United India Insurance Co. Ltd.uiic.co.in
A government-owned general insurance company in India offering a range of insurance products and services to customers |
2,138 | |||
| 9 |
University of Madrasunom.ac.in
Higher education institution offering a wide range of courses with experienced faculty focused on quality education and student development. |
1,933 | |||
| 10 |
Indian Overseas Bankiob.bank.in
An established public sector bank in India, dedicated to serving the nation with financial services since 1937 |
1,478 | |||
| 11 |
High Court of Judicature at Madrashcmadras.tn.nic.in
Established in 1862, the High Court of Judicature at Madras is the highest court in Tamil Nadu, exercising original and appellate jurisdiction |
1,201 | |||
| 12 |
National Institute of Technology, Tiruchirappallinitt.edu
A leading university offering doctoral programs in STEM fields, focusing on excellence in technology and research, with international partnerships and cultural events attracting students nationwide |
1,128 | |||
| 13 | 1,093 | ||||
| 14 |
Central Institute of Plastics Engineering & Technology (CIPET)cipet.gov.in
An autonomous institute in India offering training and services in the field of plastic engineering, including design, processing, testing, and consultancy |
1,044 | |||
| 15 |
Periyar Universityperiyaruniversity.ac.in
A renowned university in Tamilnadu established in 1997, offering various postgraduate programs and accredited with 'A' grade by NAAC |
883 | |||
| 16 |
Chennaichennaimetrorail.org
The company operates a rapid transit system in Chennai, India, providing efficient transportation services to the city's residents and visitors |
881 | |||
| 17 |
Tamilnadu Newsprint and PapersLimtiedtnpl.com
A producer of newsprint and paper products based in Tamil Nadu, specializing in printing and writing papers for various industries |
829 | |||
| 18 |
CSIR - Central Leather Research Instituteclri.org
A pioneering institute in India dedicated to advancing research, technology, education, and innovation in the leather sector for economic growth and global leadership |
801 | |||
| 19 |
Tamil Nadu Veterinary and Animal Sciences Universitytanuvas.tn.nic.in
The organization focuses on education, research, and extension activities in veterinary, animal, fisheries, food, and dairy sciences to benefit farmers |
692 | |||
| 20 |
MMTC Limitedmmtclimited.com
India's largest trading giant with extensive international trade network, specializing in import-export operations, promoting joint ventures for market opportunities worldwide |
689 | |||
| 21 |
NPTELnptel.ac.in
Provides free high-quality digital education resources, including courses in engineering, science, arts, and technology, empowering learners across India to acquire essential skills and knowledge. |
660 | |||
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| 22 |
Chennai Metro Rail Limitedchennaimetrorail.org
Special Purpose Vehicle implementing Chennai Metro Rail Project, now a Joint Venture of Government of India and Tamil Nadu |
640 | |||
| 23 |
Madras Medical College (MMC)
This company is a historic medical institution established in 1664, providing healthcare services, medical education, and research in Chennai, India |
593 | |||
| 24 |
Government College of Technology, Coimbatoregct.ac.in
An autonomous state-funded engineering college in Coimbatore, India affiliated to Anna University, known for setting benchmarks in technical education since 1945 |
511 | |||
| 25 |
Indira Gandhi Centre for Atomic Research (IGCAR)igcar.ernet.in
A research organization located in Kalpakkam, Chennai, India, focusing on atomic research and technological advancements in the field |
511 | |||
| 26 |
Manonmaniam Sundaranar Universitymsuniv.ac.in
An institution of higher learning in rural Tamil Nadu, providing education to 73,000 students through affiliated and constituent colleges |
510 | |||
| 27 |
Bharathidasan University, Tiruchirappallionlinecareer360.com
Bharathidasan University, Tiruchirappalli in India provides higher education and is located in Tamil Nadu |
478 | |||
| 28 |
Indian Ordnance Factoriesofbindia.gov.in
The company specializes in producing, testing, and marketing a wide range of products for land, sea, and air systems with a focus on research and development |
444 | |||
| 29 |
National Institute of Ocean Technologyniot.res.in
An autonomous institute under the Ministry of Earth Sciences in India specializing in developing ocean technologies for sustainable resource utilization and environmental management |
418 | |||
| 30 |
Madurai Medical College and Hospital (MDUMC)madurai.nic.in
A renowned medical school and hospital in Tamil Nadu, India, providing tertiary care to millions of people since 1954 |
406 | |||
| 31 |
Indian Institute of Information Technology Design & Manufacturing Kancheepuramiiitdm.ac.in
A Center of Excellence for design and manufacturing engineering education and research established by the Government of India |
368 | |||
| 32 |
Bharathidasan University (BDU), Tiruchirappallibdu.ac.in
A recognized university in Tamil Nadu, India with affiliated colleges, offering a wide range of science and arts programs supported by the UGC |
356 | |||
| 33 |
Central Institute of Petrochemicals Engineering & Technology (CIPET)cipet.gov.in
The company offers education and training for skilled labor in the plastics and polymer science fields, as well as product development and mold production services |
353 | |||
| 34 |
Tamil Nadu National Law Universitytnnlu.ac.in
A law university in Trichy providing global standard legal education to students, emphasizing on national level training programs |
351 | |||
| 35 |
TIDEL Park Limitedtidelpark.com
Information technology park in Chennai, part of key infrastructure projects transforming Tamil Nadu with a focus on IT development and economic growth |
349 | |||
| 36 |
STANLEY MEDICAL COLLEGE & HOSPITAL (Inst. Code - 002), CHENNAIstanleymedicalcollege.ac.in
A medical institution affiliated with the government providing healthcare services, medical education, and research opportunities |
347 | |||
| 37 |
Tamilnadu Electricity Boardtangedco.gov.in
A government-owned power generation and distribution company based in Tamil Nadu, India |
341 | |||
| 38 |
Central University of Tamil Nadu, Tiruvarurcutn.ac.in
A higher education institution located in Tamil Nadu, India, providing academic programs and research opportunities for students |
340 | |||
| 39 |
College of Engineering, Guindyceg.annauniv.edu
A higher education institution located in Chennai, India, offering engineering programs from its campus at Anna University in Guindy |
337 | |||
| 40 |
Anna Universityannauniv.edu
A public state university in Chennai, India, founded in 1978, named after a former Chief Minister of Tamil Nadu |
337 | |||
| 41 |
ICMR National Institute of Epidemiology (ICMR - NIE)nie.gov.in
A hospital & health care company located in Chennai, India, specializing in epidemiology research and studies under the ICMR |
320 | |||
| 42 |
Thiruvalluvar University, Velloretvu.edu.in
A state university established in 2002 in Vellore, Tamil Nadu, focused on research, dissemination of knowledge, and economic and social upliftment |
266 | |||
| 43 |
Bhartiya Nabhikiya Vidyut Nigam Ltd. ( BHAVINI )bhavini.nic.in
A government company under DAE focused on constructing and operating Fast Breeder Reactors for electricity generation in India |
199 | |||
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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 Tamil Nadu
- The largest companies in Tamil Nadu 1,609
- Manufacturers in Tamil Nadu 303
- Multinational companies in Tamil Nadu 285
- Education providers in Tamil Nadu 258
- Companies with in-house R&D in Tamil Nadu 226
- Higher Education companies in Tamil Nadu 168
- IT Services and IT Consulting companies in Tamil Nadu 152
- IT services companies in Tamil Nadu 140
- Hardware manufacturers in Tamil Nadu 128
- Retail chains in Tamil Nadu 96
- Automotive manufacturers and suppliers in Tamil Nadu 95
- Education Administration Programs companies in Tamil Nadu 91
- Publicly traded companies in Tamil Nadu 83
- Professional services firms in Tamil Nadu 82
- Financial services firms in Tamil Nadu 77
- Corporate groups and holding companies in Tamil Nadu 77
- Critical infrastructure operators in Tamil Nadu 76
- Companies with a mobile app in Tamil Nadu 75
- Financial Services companies in Tamil Nadu 75
- Healthcare providers in Tamil Nadu 74
- Hospitals and Health Care companies in Tamil Nadu 70
- Motor Vehicle Manufacturing companies in Tamil Nadu 68
- Consulting firms in Tamil Nadu 61
- Software Development companies in Tamil Nadu 58
The same list elsewhere in India
- Public sector organisations in India 877
- Public sector organisations in Maharashtra 111
- Public sector organisations in Uttar Pradesh 62
- Public sector organisations in Gujarat 51
- Public sector organisations in West Bengal 49
- Public sector organisations in Karnataka 48
- Public sector organisations in Kerala 45
- Public sector organisations in New Delhi 168
- Public sector organisations in Mumbai 60
- Public sector organisations in Bengaluru 35
- Public sector organisations in Kolkata 34
- Public sector organisations in Chennai 31