This selection of companies with in-house R&D in Seoul includes large corporations in manufacturing and higher education. Notable examples include Hyundai Motor Company, a global automotive company, LG Electronics, known for home appliances and electronics, and Hyundai Engineering & Construction Co.,Ltd., a specialist in civil engineering and power plants. Also present are Seoul National University, a leading academic community, and AMOREPACIFIC, a beauty conglomerate.
The companies listed are primarily large, established entities, with several founded in the mid-20th century, such as Hyundai Engineering & Construction Co.,Ltd. (1947) and AMOREPACIFIC (1945). The data shows a strong presence of motor vehicle manufacturing and electronics, alongside significant contributions from the construction sector and higher education institutions.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Hyundai Motor Companyhyundai.com
Global automotive company producing millions of vehicles annually, focusing on clean energy, connected technology, and human-centered mobility solutions. |
66,571 | |||
| 2 |
LG Electronicslg.com
This company provides products and services aimed at improving lives through innovation in home appliances, electronics, digital signage, and more |
64,886 | |||
| 3 |
Hyundai Engineering & Construction Co.,Ltd.en.hdec.kr
A leading South Korean construction company specializing in civil engineering, architecture, power plants, and nuclear power stations, focusing on improving life quality through innovation |
13,577 | |||
| 4 |
Hyundai MOBISmobis.com
Specializing in automotive technology, we are a leading supplier of parts worldwide, with a focus on software and system solutions for future mobility |
8,509 | |||
| 5 |
Seoul National University
Leading academic community fostering scientific and technological progress, embracing challenges, and driving global transformation amid uncertainty. |
8,458 | |||
| 6 |
LG Energy Solutionlgensol.com
A leading company in eco-friendly energy solutions, specializing in distinctive materials and next-generation batteries for EVs and energy storage systems |
7,463 | |||
| 7 |
LG Displaylgdisplay.com
Manufacturing display panels for TVs, computers, automobiles, tablets, and mobile devices in facilities across Korea, China, and Vietnam. |
6,139 | |||
| 8 |
LG Chemlgchem.com
A global chemical company specializing in petrochemicals, advanced materials, and life sciences, committed to carbon-neutral growth and net-zero emissions by 2050 |
5,545 | |||
| 9 |
Hanyang Universityhanyang.ac.kr
Private research university in South Korea with campuses in Seoul and Ansan Known for engineering, architecture, CEO alumni, and international student enrollment |
3,920 | |||
| 10 |
SK Innovationskinnovation.com
SK Innovation is a leading energy company focused on sustainable technologies, oil refining, petrochemicals, electric vehicle batteries, and global material solutions |
3,906 | |||
| 11 |
AMOREPACIFICapgroup.com
Established in 1945, this leading Korean beauty conglomerate operates numerous brands in beauty, personal care, and health care industries |
3,746 | |||
| 12 |
LG Innoteklginnotek.com
A global materials and components company innovating for various industries with products like camera modules, display substrates, semiconductor packages, and Industry 40 technologies |
3,387 | |||
| 13 |
DL E&C Co., Ltddlenc.co.kr
A global construction company with over 80 years of experience, specializing in infrastructure projects, development, and ecofriendly initiatives such as CCUS and clean energy |
2,882 | |||
| 14 |
Kia Worldwideworldwide.kia.com
The company believes movement inspires ideas and creates sustainable mobility solutions, products, stores, and services to free up time for activities |
2,778 | |||
| 15 |
Sungkyunkwan Universityskku.edu
A top-ranking private university in Korea focusing on nurturing students' soft skills, supported by Samsung for academic and research advancements |
2,605 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 16 |
Hyosung Corporationhyosung.com
An innovative conglomerate focused on developing materials, parts, and equipment for safer vehicles, sustainable electricity, functional clothing, and customer well-being |
2,571 | |||
| 17 |
Kyung Hee Universitykhu.ac.kr
A leading comprehensive university in South Korea, promoting academic excellence and peacebuilding with a history of 68 years and multiple campuses |
2,457 | |||
| 18 |
SK Groupeng.sk.com
Investment and development in manufacturing, EV batteries, hydrogen energy, pharmaceuticals, semiconductors, focusing on growth, governance, and social impact. |
2,368 | |||
| 19 |
PUBG Corporationkrafton.com
KRAFTON, Inc is a collective of game development studios creating innovative entertainment experiences worldwide, including popular titles like PUBG and TERA |
2,256 | |||
| 20 |
CJ Logisticscjlogistics.com
Leading global logistics company providing innovative supply chain management, technology, engineering, and consulting services across 40 countries worldwide. |
1,956 | |||
| 21 |
Hanwha Systemshanwhasystems.com
Global company based in South Korea providing defense electronics, ICT solutions, and cutting-edge technology such as air taxis and satellite communication antennas |
1,375 | |||
| 22 |
Genesisgenesis.com
Genesis is a global luxury automotive brand focusing on high-performance, design, safety, and innovation while leading the way towards a sustainable future with electrification |
1,363 | |||
| 23 |
Kookmin Universitykookmin.ac.kr
A leading university providing quality education and research opportunities for students in a variety of disciplines |
1,340 | |||
| 24 |
Hansae Fashion Worldwidehansae.com
A global apparel exporter with 14 locations in 7 countries, specializing in fashion design and aiming to inspire dreams and contribute to society |
1,270 | |||
| 25 |
SK Oneng.sk-on.com
A global leader in electric vehicle battery development and solutions, offering safe, high-performing products and comprehensive services for sustainable battery lifecycle |
1,224 | |||
| 26 |
Daewoong Pharmaceuticaldaewoong.co.kr
A South Korean pharmaceutical company established in 1945, develops, manufactures, and commercializes pharmaceuticals globally, with a focus on new drug development and international collaborations |
1,158 | |||
| 27 |
Sogang Universitywwwe.sogang.ac.kr
A prestigious Jesuit university in South Korea offering diverse undergraduate and graduate programs, known for high academic standards and global alumni success |
1,130 | |||
| 28 |
Seoul National University Hospitalsnuh.org
A leading medical center in Korea, pioneering world-class standards in healthcare, medical education, research, and patient care through innovation and globalization |
1,099 | |||
| 29 |
Osstemosstem.com
A leading dental implant company in Korea, pioneering the market, offering comprehensive dental solutions globally to become the top dental industry leader |
1,043 | |||
| 30 |
Sae-A Trading Co.,Ltdsae-a.com
A global apparel manufacturer with 40+ facilities in 10 countries, supplying top retailers with high-quality products while prioritizing community engagement and corporate social responsibility |
1,030 | |||
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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 Nov 12, 2026.
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- Multinational companies in Seoul 150
- Manufacturers in Seoul 70
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- Publicly traded companies in Seoul 61
- Corporate groups and holding companies in Seoul 59
- IT Services and IT Consulting companies in Seoul 57
- Financial services firms in Seoul 49
- Hardware manufacturers in Seoul 42
- Retail chains in Seoul 39
- Critical infrastructure operators in Seoul 36
- Education providers in Seoul 30
- Financial Services companies in Seoul 28
- AI companies in Seoul 26