# Top 30 companies with in-house R&D in Seoul
Tamtam tracks 88 companies with in-house R&D headquartered in Seoul. This list ranks the 30 largest by number of employees on LinkedIn, led by Hyundai Motor Company, LG Electronics and Hyundai Engineering & Construction Co.,Ltd.. Their median headcount is 2,605. Half of them were founded in 1960 or later.
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.
๐ฐ๐ท Seoul ยท 30 companies ยท Updated Nov 12, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Hyundai Motor Company](https://www.tamtam.ai/c/hyundai-motor-company) (hyundai.com)
Global automotive company producing millions of vehicles annually, focusing on clean energy, connected technology, and human-centered mobility solutions. | Motor Vehicle Manufacturing | ๐ฐ๐ท Seoul | 66,571 | |
| 2 | [LG Electronics](https://www.tamtam.ai/c/lg-electronics) (lg.com)
This company provides products and services aimed at improving lives through innovation in home appliances, electronics, digital signage, and more | Appliances, Electrical, and Electronics Manufacturing | ๐ฐ๐ท Seoul | 64,886 | |
| 3 | [Hyundai Engineering & Construction Co.,Ltd.](https://www.tamtam.ai/c/hyundai-engineering-and-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 | Construction | ๐ฐ๐ท Seoul | 13,577 | 1947 |
| 4 | [Hyundai MOBIS](https://www.tamtam.ai/c/hyundai-mobis) (mobis.com)
Specializing in automotive technology, we are a leading supplier of parts worldwide, with a focus on software and system solutions for future mobility | Motor Vehicle Manufacturing | ๐ฐ๐ท Seoul | 8,509 | 1977 |
| 5 | [Seoul National University](https://www.tamtam.ai/c/seoul-national-university)
Leading academic community fostering scientific and technological progress, embracing challenges, and driving global transformation amid uncertainty. | Higher Education | ๐ฐ๐ท Seoul | 8,458 | |
| 6 | [LG Energy Solution](https://www.tamtam.ai/c/lg-energy-solution) (lgensol.com)
A leading company in eco-friendly energy solutions, specializing in distinctive materials and next-generation batteries for EVs and energy storage systems | Appliances, Electrical, and Electronics Manufacturing | ๐ฐ๐ท Seoul | 7,463 | |
| 7 | [LG Display](https://www.tamtam.ai/c/lg-display) (lgdisplay.com)
Manufacturing display panels for TVs, computers, automobiles, tablets, and mobile devices in facilities across Korea, China, and Vietnam. | Appliances, Electrical, and Electronics Manufacturing | ๐ฐ๐ท Seoul | 6,139 | 1987 |
| 8 | [LG Chem](https://www.tamtam.ai/c/lg-chem) (lgchem.com)
A global chemical company specializing in petrochemicals, advanced materials, and life sciences, committed to carbon-neutral growth and net-zero emissions by 2050 | Chemical Manufacturing | ๐ฐ๐ท Seoul | 5,545 | 1947 |
| 9 | [Hanyang University](https://www.tamtam.ai/c/hanyang-university) (hanyang.ac.kr)
Private research university in South Korea with campuses in Seoul and Ansan Known for engineering, architecture, CEO alumni, and international student enrollment | Higher Education | ๐ฐ๐ท Seoul | 3,920 | |
| 10 | [SK Innovation](https://www.tamtam.ai/c/sk-innovation) (skinnovation.com)
SK Innovation is a leading energy company focused on sustainable technologies, oil refining, petrochemicals, electric vehicle batteries, and global material solutions | Oil and Gas | ๐ฐ๐ท Seoul | 3,906 | 1962 |
| 11 | [AMOREPACIFIC](https://www.tamtam.ai/c/amorepacific) (apgroup.com)
Established in 1945, this leading Korean beauty conglomerate operates numerous brands in beauty, personal care, and health care industries | Personal Care Product Manufacturing | ๐ฐ๐ท Seoul | 3,746 | 1945 |
| 12 | [LG Innotek](https://www.tamtam.ai/c/lg-innotek) (lginnotek.com)
A global materials and components company innovating for various industries with products like camera modules, display substrates, semiconductor packages, and Industry 40 technologies | Appliances, Electrical, and Electronics Manufacturing | ๐ฐ๐ท Seoul | 3,387 | 1970 |
| 13 | [DL E&C Co., Ltd](https://www.tamtam.ai/c/dl-e-and-c-co-ltd) (dlenc.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 | Construction | ๐ฐ๐ท Seoul | 2,882 | 1939 |
| 14 | [Kia Worldwide](https://www.tamtam.ai/c/kia-worldwide) (worldwide.kia.com)
The company believes movement inspires ideas and creates sustainable mobility solutions, products, stores, and services to free up time for activities | Motor Vehicle Manufacturing | ๐ฐ๐ท Seoul | 2,778 | |
| 15 | [Sungkyunkwan University](https://www.tamtam.ai/c/sungkyunkwan-university) (skku.edu)
A top-ranking private university in Korea focusing on nurturing students' soft skills, supported by Samsung for academic and research advancements | Higher Education | ๐ฐ๐ท Seoul | 2,605 | 1398 |
| 16 | [Hyosung Corporation](https://www.tamtam.ai/c/hyosung-corporation) (hyosung.com)
An innovative conglomerate focused on developing materials, parts, and equipment for safer vehicles, sustainable electricity, functional clothing, and customer well-being | International Trade and Development | ๐ฐ๐ท Seoul | 2,571 | 1966 |
| 17 | [Kyung Hee University](https://www.tamtam.ai/c/kyung-hee-university) (khu.ac.kr)
A leading comprehensive university in South Korea, promoting academic excellence and peacebuilding with a history of 68 years and multiple campuses | Higher Education | ๐ฐ๐ท Seoul | 2,457 | 1949 |
| 18 | [SK Group](https://www.tamtam.ai/c/sk-group) (eng.sk.com)
Investment and development in manufacturing, EV batteries, hydrogen energy, pharmaceuticals, semiconductors, focusing on growth, governance, and social impact. | Manufacturing | ๐ฐ๐ท Seoul | 2,368 | 1953 |
| 19 | [PUBG Corporation](https://www.tamtam.ai/c/pubg-corporation) (krafton.com)
KRAFTON, Inc is a collective of game development studios creating innovative entertainment experiences worldwide, including popular titles like PUBG and TERA | Computer Games | ๐ฐ๐ท Seoul | 2,256 | |
| 20 | [CJ Logistics](https://www.tamtam.ai/c/cj-logistics-seoul) (cjlogistics.com)
Leading global logistics company providing innovative supply chain management, technology, engineering, and consulting services across 40 countries worldwide. | Transportation, Logistics, Supply Chain and Storage | ๐ฐ๐ท Seoul | 1,956 | 1930 |
| 21 | [Hanwha Systems](https://www.tamtam.ai/c/hanwha-systems) (hanwhasystems.com)
Global company based in South Korea providing defense electronics, ICT solutions, and cutting-edge technology such as air taxis and satellite communication antennas | Aviation and Aerospace Component Manufacturing | ๐ฐ๐ท Seoul | 1,375 | 1978 |
| 22 | [Genesis](https://www.tamtam.ai/c/genesis-seoul) (genesis.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 | Motor Vehicle Manufacturing | ๐ฐ๐ท Seoul | 1,363 | |
| 23 | [Kookmin University](https://www.tamtam.ai/c/kookmin-university) (kookmin.ac.kr)
A leading university providing quality education and research opportunities for students in a variety of disciplines | Higher Education | ๐ฐ๐ท Seoul | 1,340 | |
| 24 | [Hansae Fashion Worldwide](https://www.tamtam.ai/c/hansae-fashion-worldwide) (hansae.com)
A global apparel exporter with 14 locations in 7 countries, specializing in fashion design and aiming to inspire dreams and contribute to society | Retail Apparel and Fashion | ๐ฐ๐ท Seoul | 1,270 | |
| 25 | [SK On](https://www.tamtam.ai/c/sk-on) (eng.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 | Manufacturing | ๐ฐ๐ท Seoul | 1,224 | 2021 |
| 26 | [Daewoong Pharmaceutical](https://www.tamtam.ai/c/daewoong-pharmaceutical) (daewoong.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 | Pharmaceutical Manufacturing | ๐ฐ๐ท Seoul | 1,158 | 1945 |
| 27 | [Sogang University](https://www.tamtam.ai/c/sogang-university) (wwwe.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 | Higher Education | ๐ฐ๐ท Seoul | 1,130 | 1960 |
| 28 | [Seoul National University Hospital](https://www.tamtam.ai/c/seoul-national-university-hospital) (snuh.org)
A leading medical center in Korea, pioneering world-class standards in healthcare, medical education, research, and patient care through innovation and globalization | Hospitals and Health Care | ๐ฐ๐ท Seoul | 1,099 | 1885 |
| 29 | [Osstem](https://www.tamtam.ai/c/osstem) (osstem.com)
A leading dental implant company in Korea, pioneering the market, offering comprehensive dental solutions globally to become the top dental industry leader | Medical Equipment Manufacturing | ๐ฐ๐ท Seoul | 1,043 | 1997 |
| 30 | [Sae-A Trading Co.,Ltd](https://www.tamtam.ai/c/sae-a-trading-co-ltd) (sae-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 | Retail Apparel and Fashion | ๐ฐ๐ท Seoul | 1,030 | 1986 |
## 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](https://www.tamtam.ai/l/multinational-companies-seoul) (150)
- [Manufacturers in Seoul](https://www.tamtam.ai/l/manufacturers-seoul) (70)
- [Companies with a mobile app in Seoul](https://www.tamtam.ai/l/companies-with-mobile-app-seoul) (62)
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- [IT Services and IT Consulting companies in Seoul](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-seoul) (57)
- [Financial services firms in Seoul](https://www.tamtam.ai/l/financial-services-firms-seoul) (49)
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- [Critical infrastructure operators in Seoul](https://www.tamtam.ai/l/critical-infrastructure-operators-seoul) (36)
- [Education providers in Seoul](https://www.tamtam.ai/l/education-companies-seoul) (30)
- [Financial Services companies in Seoul](https://www.tamtam.ai/l/financial-services-companies-seoul) (28)
- [AI companies in Seoul](https://www.tamtam.ai/l/ai-companies-seoul) (26)
## The same list elsewhere in South Korea
- [Companies with in-house R&D in South Korea](https://www.tamtam.ai/l/r-and-d-companies-south-korea) (229)
- [Companies with in-house R&D in Gyeonggi](https://www.tamtam.ai/l/r-and-d-companies-gyeonggi) (56)
## The same list elsewhere
- [Companies with in-house R&D in the world](https://www.tamtam.ai/l/r-and-d-companies-in-the-world) (34,346)
- [Companies with in-house R&D in Asia](https://www.tamtam.ai/l/r-and-d-companies-in-asia) (4,166)
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Source: https://www.tamtam.ai/l/r-and-d-companies-seoul