# 100 leading multinational companies in South Korea

Tamtam tracks 299 multinational companies headquartered in South Korea. This list ranks the 100 largest by number of employees on LinkedIn, led by Samsung Electronics, Hyundai Motor Company and LG Electronics. Their median headcount is 2,407. Half of them were founded in 1973 or later. The most common headquarters are Seoul (57) and Seongnam (3).

These large multinational companies in South Korea are primarily active in manufacturing, particularly in electronics, automotive, and heavy industries. They are well-established entities, with several founded in the mid-20th century, indicating a mature industrial base. Samsung Electronics leads in global technology, Hyundai Motor Company manufactures vehicles, LG Electronics focuses on home appliances and electronics, and Doosan specializes in industrial machinery and infrastructure.

A clear pattern is the dominance of companies headquartered in Seoul. Many of these firms, such as Samsung C&T Corporation and Hyundai Engineering & Construction Co.,Ltd., also have significant operations in the construction sector, highlighting a strong national and international presence in infrastructure development.

🇰🇷 South Korea · 100 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Samsung Electronics](https://www.tamtam.ai/c/samsung-electronics) (samsung.com)<br>A global technology leader, constantly innovating in TVs, smartphones, wearables, appliances, medical devices, and more Embracing diversity and creativity for growth | Computers and Electronics Manufacturing | 🇰🇷 Suwon-Si | 287,000 |  |
| 2 | [Hyundai Motor Company](https://www.tamtam.ai/c/hyundai-motor-company) (hyundai.com)<br>Global automotive company producing millions of vehicles annually, focusing on clean energy, connected technology, and human-centered mobility solutions. | Motor Vehicle Manufacturing | 🇰🇷 Seoul | 66,571 |  |
| 3 | [LG Electronics](https://www.tamtam.ai/c/lg-electronics) (lg.com)<br>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 | 🇰🇷 Seoul | 64,886 |  |
| 4 | [Doosan](https://www.tamtam.ai/c/doosan) (doosan.com)<br>A global company specializing in building power plants, industrial facilities, machine tools, engines, bridges, construction equipment, and consumer products | Industrial Machinery Manufacturing | 🇰🇷 Seoul | 42,000 | 1896 |
| 5 | [Samsung Mobile](https://www.tamtam.ai/c/samsung-mobile) (samsung.com)<br>This company specializes in providing secure and highly productive mobile solutions for enterprises, focusing on Android security and productivity on Samsung Galaxy devices worldwide | Consumer Electronics | 🇰🇷 Gyeonggi-do | 19,596 | 1969 |
| 6 | [Samsung SDS](https://www.tamtam.ai/c/samsung-sds) (samsungsds.com)<br>Delivers specialized cloud platforms, digital logistics management, and SaaS solutions to optimize business environments and drive industrial innovation through global IT expertise. | IT Services and IT Consulting | 🇰🇷 Seoul | 15,040 |  |
| 7 | [Hyundai Engineering & Construction Co.,Ltd.](https://www.tamtam.ai/c/hyundai-engineering-and-construction-co-ltd) (en.hdec.kr)<br>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 | 🇰🇷 Seoul | 13,577 | 1947 |
| 8 | [Samsung C&T Corporation](https://www.tamtam.ai/c/samsung-c-and-t-corporation) (samsungcnt.com)<br>An international corporation offering services and products in over 50 countries, specializing in engineering & construction, trading & investment, fashion, and resort | Construction | 🇰🇷 Seoul | 9,942 | 1938 |
| 9 | [SAMSUNG E&A](https://www.tamtam.ai/c/samsung-e-and-a) (samsungena.com)<br>The company specializes in engineering, procurement, construction, and project management for various industries worldwide, focusing on innovative solutions and quality services | Construction | 🇰🇷 Gangdong-Gu | 9,171 | 1970 |
| 10 | [Hyundai MOBIS](https://www.tamtam.ai/c/hyundai-mobis) (mobis.com)<br>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 | 🇰🇷 Seoul | 8,509 | 1977 |
| 11 | [SK hynix](https://www.tamtam.ai/c/sk-hynix) (skhynix.com)<br>Leading global producer of DRAM and NAND Flash memory chips, providing advanced semiconductor solutions for diverse IT product demands worldwide. | Renewable Energy Semiconductor Manufacturing | 🇰🇷 Icheon | 8,276 | 1983 |
| 12 | [LG Energy Solution](https://www.tamtam.ai/c/lg-energy-solution) (lgensol.com)<br>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 | 🇰🇷 Seoul | 7,463 |  |
| 13 | [Hanwha Group](https://www.tamtam.ai/c/hanwha-group) (hanwha.com)<br>Global diversified business group specializing in energy, aerospace, finance, retail, and services with a strong focus on sustainability and innovation. | Chemical Manufacturing | 🇰🇷 Seoul | 7,341 |  |
| 14 | [GS E&C](https://www.tamtam.ai/c/gs-e-and-c) (gsenc.com)<br>A global contractor specializing in civil engineering, building, oil & gas, power plants, and renewable energy to provide premier design and construction services | Construction | 🇰🇷 Seoul | 7,117 | 1969 |
| 15 | [Hanon Systems](https://www.tamtam.ai/c/hanon-systems) (hanonsystems.com)<br>A global supplier of automotive thermal and energy management solutions for electrified and conventional vehicles, focusing on innovation, global reach, and sustainable value creation | Motor Vehicle Manufacturing | 🇰🇷 Daejeon | 6,236 | 1986 |
| 16 | [LG Display](https://www.tamtam.ai/c/lg-display) (lgdisplay.com)<br>Manufacturing display panels for TVs, computers, automobiles, tablets, and mobile devices in facilities across Korea, China, and Vietnam. | Appliances, Electrical, and Electronics Manufacturing | 🇰🇷 Seoul | 6,139 | 1987 |
| 17 | [LG Chem](https://www.tamtam.ai/c/lg-chem) (lgchem.com)<br>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 | 🇰🇷 Seoul | 5,545 | 1947 |
| 18 | [Daewoo Engineering & Construction Co.,Ltd.](https://www.tamtam.ai/c/daewoo-engineering-and-construction-co-ltd) (daewooenc.com)<br>A global construction innovator committed to changing the world with market-leading technologies, creating impactful projects worldwide for a brighter future | Construction | 🇰🇷 Seoul | 5,515 | 1973 |
| 19 | [Yonsei University](https://www.tamtam.ai/c/yonsei-university) (yonsei.ac.kr)<br>Leading university in Seoul offering comprehensive programs in education, research, and medical care with a global network and focus on sustainable development | Higher Education | 🇰🇷 Seodaemun-gu | 5,273 | 1885 |
| 20 | [NAVER Corp](https://www.tamtam.ai/c/naver-corp) (navercorp.com)<br>A global ICT company offering search portal, messenger, camera app, webtoon, metaverse platform, AI, robotics, and mobility innovations for shared growth | Technology, Information and Internet | 🇰🇷 Seongnam-Si | 5,121 | 1999 |
| 21 | [HD Hyundai Heavy Industries](https://www.tamtam.ai/c/hd-hyundai-heavy-industries) (hhi.co.kr)<br>A global leader in shipbuilding and heavy industries, with a history of innovation and excellence in delivering large-scale projects worldwide | Shipbuilding | 🇰🇷 Ulsan | 4,308 |  |
| 22 | [Samsung SDI](https://www.tamtam.ai/c/samsung-sdi) (samsungsdi.com)<br>Development and production of innovative technology products with cutting-edge features, focusing on creativity and continuous improvement since 1970. | Appliances, Electrical, and Electronics Manufacturing | 🇰🇷 Yongin-si | 4,080 | 1970 |
| 23 | [POSCO HOLDINGS](https://www.tamtam.ai/c/posco-holdings) (newsroom.posco.com)<br>A global steel producer known for innovative solutions, recognized for competitiveness, and committed to corporate citizenship and sustainable growth | Holding Companies | 🇰🇷 Pohang | 3,967 | 1968 |
| 24 | [Hanyang University](https://www.tamtam.ai/c/hanyang-university) (hanyang.ac.kr)<br>Private research university in South Korea with campuses in Seoul and Ansan Known for engineering, architecture, CEO alumni, and international student enrollment | Higher Education | 🇰🇷 Seoul | 3,920 |  |
| 25 | [SK Innovation](https://www.tamtam.ai/c/sk-innovation) (skinnovation.com)<br>SK Innovation is a leading energy company focused on sustainable technologies, oil refining, petrochemicals, electric vehicle batteries, and global material solutions | Oil and Gas | 🇰🇷 Seoul | 3,906 | 1962 |
| 26 | [AMOREPACIFIC](https://www.tamtam.ai/c/amorepacific) (apgroup.com)<br>Established in 1945, this leading Korean beauty conglomerate operates numerous brands in beauty, personal care, and health care industries | Personal Care Product Manufacturing | 🇰🇷 Seoul | 3,746 | 1945 |
| 27 | [Korean Air](https://www.tamtam.ai/c/korean-air) (koreanair.com)<br>Operating a modern fleet, serving 120 cities globally, providing passenger and cargo air transport with high safety and service standards. | Airlines and Aviation | 🇰🇷 Seoul | 3,648 | 1969 |
| 28 | [HL Mando](https://www.tamtam.ai/c/hl-mando) (hlmando.com)<br>A leading automotive parts company focused on developing cutting-edge technology and quality parts for safe vehicles on a global scale | Motor Vehicle Manufacturing | 🇰🇷 Seongnam | 3,561 | 1962 |
| 29 | [HMM](https://www.tamtam.ai/c/hmm) (hmm21.com)<br>Global logistics company providing integrated services through a large fleet, worldwide networks, and expert professionals to lead in shipping industry | Maritime Transportation | 🇰🇷 Seoul | 3,553 | 1976 |
| 30 | [LG Innotek](https://www.tamtam.ai/c/lg-innotek) (lginnotek.com)<br>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 | 🇰🇷 Seoul | 3,387 | 1970 |
| 31 | [SK](https://www.tamtam.ai/c/sk-341140) (skcareers.com)<br>A diverse collection of multinational manufacturing and service companies united under a holding structure, sharing a common brand and culture for growth and prosperity | Telecommunications | 🇰🇷 Seoul | 3,317 | 1953 |
| 32 | [SK Engineering & Construction Co. Ltd](https://www.tamtam.ai/c/sk-engineering-and-construction-co-ltd) (skecoplant.com)<br>A company established in 1977, focused on sustainable growth, stability, and achieving happiness for humanity through consistent efforts | Oil and Gas | 🇰🇷 Seoul | 3,256 | 1977 |
| 33 | [Toss](https://www.tamtam.ai/c/toss) (toss.im)<br>A fintech company in South Korea aiming to revolutionize the financial industry by providing innovative and user-friendly financial services to make banking simple and convenient | Financial Services | 🇰🇷 Seoul | 3,240 |  |
| 34 | [Engoo](https://www.tamtam.ai/c/engoo) (engoo.com)<br>Global provider of engaging 1-on-1 language lessons via a platform integrated with original materials, connecting people worldwide through language learning | E-Learning Providers | 🇰🇷 Seoul | 3,216 | 2013 |
| 35 | [LX Pantos](https://www.tamtam.ai/c/lx-pantos) (lxpantos.com)<br>Global logistics company offering forwarding, contract logistics, e-commerce logistics, express delivery, and supply chain management consulting services. | Transportation, Logistics, Supply Chain and Storage | 🇰🇷 Seoul | 3,190 | 1977 |
| 36 | [Youngone Corporation](https://www.tamtam.ai/c/youngone-corporation) (youngone.co.kr)<br>Manufacturing performance and outdoor apparel, footwear, bags, and accessories with global production facilities and a focus on quality and community development. | Retail Apparel and Fashion | 🇰🇷 | 3,155 | 1974 |
| 37 | [Shinhan Bank](https://www.tamtam.ai/c/shinhan-bank) (shinhan.com)<br>A leading South Korean bank offering retail, corporate, and investment banking services to millions of customers domestically and across multiple countries | Financial Services | 🇰🇷 Seoul | 3,147 | 1982 |
| 38 | [CJ CheilJedang](https://www.tamtam.ai/c/cj-cheiljedang) (cj.co.kr)<br>A global lifestyle company transitioning from a food company, focusing on healthy, convenient products, biotech, and global expansion with premium brands | Food and Beverage Services | 🇰🇷 Jung-gu | 3,111 |  |
| 39 | [Samsung Electro-Mechanics](https://www.tamtam.ai/c/samsung-electro-mechanics) (samsungsem.com)<br>Develops and produces advanced electronic components, modules, and substrates globally using high-frequency wireless materials and precision mechanics for diverse business-to-business technology solutions. | Appliances, Electrical, and Electronics Manufacturing | 🇰🇷 Suwon | 3,077 | 1973 |
| 40 | [Cheil Worldwide](https://www.tamtam.ai/c/cheil-worldwide) (cheil.com)<br>A global agency specializing in performance-driven marketing, connecting creativity, data, tech, and retail to enhance business performance and consumer brand experience | Advertising Services | 🇰🇷 Seoul | 3,067 | 1973 |
| 41 | [DL E&C Co., Ltd](https://www.tamtam.ai/c/dl-e-and-c-co-ltd) (dlenc.co.kr)<br>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 | 🇰🇷 Seoul | 2,882 | 1939 |
| 42 | [Kia Worldwide](https://www.tamtam.ai/c/kia-worldwide) (worldwide.kia.com)<br>The company believes movement inspires ideas and creates sustainable mobility solutions, products, stores, and services to free up time for activities | Motor Vehicle Manufacturing | 🇰🇷 Seoul | 2,778 |  |
| 43 | [Celltrion Inc](https://www.tamtam.ai/c/celltrion-inc) (celltrion.com)<br>Global marketer of biological medicines, including the world's first biosimilar monoclonal antibody, to expand patient access to advanced therapies worldwide | Pharmaceutical Manufacturing | 🇰🇷 Incheon | 2,628 | 1999 |
| 44 | [Sungkyunkwan University](https://www.tamtam.ai/c/sungkyunkwan-university) (skku.edu)<br>A top-ranking private university in Korea focusing on nurturing students' soft skills, supported by Samsung for academic and research advancements | Higher Education | 🇰🇷 Seoul | 2,605 | 1398 |
| 45 | [KOTRA](https://www.tamtam.ai/c/kotra) (kotra.or.kr)<br>A dedicated agency in Korea focused on expanding export markets, supporting Korean companies overseas, and promoting globalization of SMEs | International Trade and Development | 🇰🇷 Seoul | 2,595 |  |
| 46 | [Hyosung Corporation](https://www.tamtam.ai/c/hyosung-corporation) (hyosung.com)<br>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 | 🇰🇷 Seoul | 2,571 | 1966 |
| 47 | [KBS (Korean Broadcasting System)](https://www.tamtam.ai/c/kbs-korean-broadcasting-system) (english.kbs.co.kr)<br>KBS is Korea's top public broadcaster, providing diverse TV, radio, and DMB programs, broadcasting in HD, and offering international content | Broadcast Media Production and Distribution | 🇰🇷 Seoul | 2,479 |  |
| 48 | [Kyung Hee University](https://www.tamtam.ai/c/kyung-hee-university) (khu.ac.kr)<br>A leading comprehensive university in South Korea, promoting academic excellence and peacebuilding with a history of 68 years and multiple campuses | Higher Education | 🇰🇷 Seoul | 2,457 | 1949 |
| 49 | [Samsung Biologics](https://www.tamtam.ai/c/samsung-biologics) (samsungbiologics.com)<br>Fully integrated CDMO providing contract development and manufacturing services for biologics products with largest capacity, fastest throughput, and proven regulatory approvals globally | Pharmaceutical Manufacturing | 🇰🇷 Yeonsu-gu | 2,450 | 2011 |
| 50 | [Yanolja](https://www.tamtam.ai/c/yanolja) (yanoljagroup.com)<br>Innovative travel platform offering services in accommodation, leisure, transportation, and restaurants, with a subsidiary providing cloud-based solutions to global hospitality industry | IT Services and IT Consulting | 🇰🇷 Seoul | 2,407 | 2005 |
| 51 | [CJ ENM ENTERTAINMENT DIV.](https://www.tamtam.ai/c/cj-enm-entertainment-div) (cjenm.com)<br>A pioneer in creating original entertainment content across various platforms, fostering talent and embracing diversity in the global entertainment industry | Entertainment Providers | 🇰🇷 Seoul | 2,405 |  |
| 52 | [SK Group](https://www.tamtam.ai/c/sk-group) (eng.sk.com)<br>Investment and development in manufacturing, EV batteries, hydrogen energy, pharmaceuticals, semiconductors, focusing on growth, governance, and social impact. | Manufacturing | 🇰🇷 Seoul | 2,368 | 1953 |
| 53 | [PUBG Corporation](https://www.tamtam.ai/c/pubg-corporation) (krafton.com)<br>KRAFTON, Inc is a collective of game development studios creating innovative entertainment experiences worldwide, including popular titles like PUBG and TERA | Computer Games | 🇰🇷 Seoul | 2,256 |  |
| 54 | [Hankook Tire](https://www.tamtam.ai/c/hankook-tire-seongnam-si) (hankooktire.com)<br>Manufacture and supply high-quality tires globally, focusing on innovation, premium brands, and sustainable ESG management practices. | Motor Vehicle Manufacturing | 🇰🇷 Seongnam-si | 2,083 | 1941 |
| 55 | [Samsung Heavy Industries](https://www.tamtam.ai/c/samsung-heavy-industries) (shi.samsung.co.kr)<br>A global leader in shipbuilding and offshore EPC projects, specializing in high-tech vessels and pioneering innovative products in various markets | Shipbuilding | 🇰🇷 Pangyo | 2,080 | 1974 |
| 56 | [HYBE](https://www.tamtam.ai/c/hybe) (hybecorp.com)<br>A global entertainment company innovating the music industry through various services like music production, management, concerts, video content, and more | Entertainment Providers | 🇰🇷 Seoul | 2,077 |  |
| 57 | [CJ Logistics](https://www.tamtam.ai/c/cj-logistics-seoul) (cjlogistics.com)<br>Leading global logistics company providing innovative supply chain management, technology, engineering, and consulting services across 40 countries worldwide. | Transportation, Logistics, Supply Chain and Storage | 🇰🇷 Seoul | 1,956 | 1930 |
| 58 | [LOTTE chemical](https://www.tamtam.ai/c/lotte-chemical) (lottechem.com)<br>A global petrochemical company focused on developing cutting-edge technologies for producing high-quality chemical products and expanding globally | Chemical Manufacturing | 🇰🇷 Songpa-gu | 1,939 | 1976 |
| 59 | [삼정KPMG (KPMG Korea)](https://www.tamtam.ai/c/kpmg-kpmg-korea) (kpmg.com)<br>A Korean member firm of KPMG International, providing top-notch knowledge services in accounting, audit, tax advisory, financial advisory, and management consulting | Accounting | 🇰🇷 Seoul | 1,826 | 1969 |
| 60 | [KIST(Korea Institute of Science and Technology)](https://www.tamtam.ai/c/kist-korea-institute-of-science-and-technology) (kist.re.kr)<br>A leading research institute in Korea focusing on science and technology development in areas such as brain science, robotics, energy, and health | Research Services | 🇰🇷 Seoul | 1,807 |  |
| 61 | [Hana Bank](https://www.tamtam.ai/c/hana-bank) (kebhana.com)<br>A leading bank in South Korea with a focus on ESG management, low-carbon finance, and digital innovation to become a global financial group | Financial Services | 🇰🇷 Seoul | 1,788 |  |
| 62 | [Doosan Enerbility](https://www.tamtam.ai/c/doosan-enerbility) (doosanenerbility.com)<br>A global provider of integrated solutions in power generation, energy, and desalination plants, offering sustainable energy solutions worldwide since 1962 | Electric Power Generation | 🇰🇷 Changwon | 1,726 | 1962 |
| 63 | [KRAFTON Inc.](https://www.tamtam.ai/c/krafton-inc) (krafton.com)<br>Group of creative studios developing innovative technology and entertainment experiences designed for long-term fan engagement and interaction. | Computer Games | 🇰🇷 Gangnam-gu | 1,682 | 2007 |
| 64 | [LINE Plus Corp](https://www.tamtam.ai/c/line-plus-corp) (linepluscorp.com)<br>A global mobile platform company offering a variety of services like search, messaging, media, commerce, fintech, and AI to create amazing everyday experiences | Technology, Information and Internet | 🇰🇷 Bundang-gu | 1,634 | 2013 |
| 65 | [CJ OLIVE YOUNG](https://www.tamtam.ai/c/cj-olive-young) (corp.oliveyoung.com)<br>A pioneer in Korean health & beauty retail, offering unique products and trends globally through 1,200 stores and global delivery | Retail | 🇰🇷 Seoul | 1,631 |  |
| 66 | [LS Cable & System](https://www.tamtam.ai/c/ls-cable-and-system) (lscns.co.kr)<br>A global cable solutions provider offering state-of-the-art products, engineering services, and global production capacity to power authorities and carriers worldwide | Manufacturing | 🇰🇷 Anyang-si | 1,630 | 1962 |
| 67 | [Hyundai Motor Group](https://www.tamtam.ai/c/hyundai-motor-group) (hyundaimotorgroup.com)<br>Global corporation in automobile, steel, construction industries with focus on creating a better future through innovative thinking and collaborative efforts | Motor Vehicle Manufacturing | 🇰🇷 Seocho-gu | 1,585 |  |
| 68 | [NEXON KOREA](https://www.tamtam.ai/c/nexon-korea) (company.nexon.com)<br>Develops and services over 40 online games across various genres in more than 190 countries worldwide, expanding gaming experiences. | Computer Games | 🇰🇷 Seongnam | 1,579 | 1994 |
| 69 | [Samsung Bioepis](https://www.tamtam.ai/c/samsung-bioepis) (samsungbioepis.com)<br>A biopharmaceutical company founded in 2012, dedicated to making healthcare accessible through innovative, high-quality biosimilar products in various therapeutic areas | Pharmaceutical Manufacturing | 🇰🇷 Yeonsu-gu | 1,574 | 2012 |
| 70 | [SM Entertainment](https://www.tamtam.ai/c/sm-entertainment) (smtown.com)<br>A leading South Korean entertainment agency managing over 400 artists, popularizing K-pop stars worldwide through music production, content creation, and global distribution | Entertainment Providers | 🇰🇷 Seongdong-gu | 1,570 | 1995 |
| 71 | [HYUNDAI TRANSYS](https://www.tamtam.ai/c/hyundai-transys) (hyundai-transys.com)<br>A global automotive parts supplier specializing in powertrain and seating components for Hyundai and Kia Motors, with operations in Asia, Europe, and the Americas | Motor Vehicle Manufacturing | 🇰🇷 Hwaseong | 1,566 | 1994 |
| 72 | [JYP Entertainment](https://www.tamtam.ai/c/jyp-entertainment) (jype.com)<br>A leading entertainment company producing global artists, expanding K-pop's influence internationally, and investing in talent discovery and development Emphasizes transparency and social responsibility | Entertainment Providers | 🇰🇷 Seoul | 1,548 |  |
| 73 | [NHN](https://www.tamtam.ai/c/nhn) (nhn.com)<br>A technology company offering diverse services in gaming, payment, commerce, content, AI/data, and cloud solutions to enhance daily life and pursue global growth | IT Services and IT Consulting | 🇰🇷 Seongnam | 1,468 | 2013 |
| 74 | [Hyundai Rotem](https://www.tamtam.ai/c/hyundai-rotem) (hyundai-rotem.co.kr)<br>A diversified company within Hyundai Motor Group providing innovative and sustainable mobility solutions in the railway, defense, and plant & machinery systems sectors globally | Truck Transportation | 🇰🇷 Uiwang-si | 1,442 |  |
| 75 | [Korea Hydro & Nuclear Power (KHNP)](https://www.tamtam.ai/c/korea-hydro-and-nuclear-power-khnp) (khnp.co.kr)<br>A leading power generation company in South Korea, providing nuclear, hydro, pumped-storage, and renewable energy solutions domestically and internationally | Nuclear Electric Power Generation | 🇰🇷 Gyeongju-si. South Korea | 1,417 | 2001 |
| 76 | [Genesis](https://www.tamtam.ai/c/genesis-seoul) (genesis.com)<br>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 | 🇰🇷 Seoul | 1,363 |  |
| 77 | [Asiana Airlines](https://www.tamtam.ai/c/asiana-airlines-gangseo-gu) (flyasiana.com)<br>An airline based in Seoul, Korea, operating over 90 routes to 77 cities in 21 countries, prioritizing customer satisfaction through safety and excellent service | Airlines and Aviation | 🇰🇷 Gangseo-gu | 1,283 | 1988 |
| 78 | [Hansae Fashion Worldwide](https://www.tamtam.ai/c/hansae-fashion-worldwide) (hansae.com)<br>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 | 🇰🇷 Seoul | 1,270 |  |
| 79 | [Dankook University](https://www.tamtam.ai/c/dankook-university) (dankook.ac.kr)<br>A leading university in Korea, focusing on grooming young talent and academic advancement with a strong emphasis on industry-university cooperation and innovation in various fields | Higher Education | 🇰🇷 Yong-in | 1,260 | 1947 |
| 80 | [KOICA](https://www.tamtam.ai/c/koica) (koica.go.kr)<br>An independent agency founded in 1991, dedicated to implementing grant aid programs across various sectors to promote global development and cooperation | International Affairs | 🇰🇷 Seongnam-Si | 1,230 | 1991 |
| 81 | [Korea Development Bank](https://www.tamtam.ai/c/korea-development-bank) (kdb.co.kr)<br>A leading policy finance institution in Korea, KDB supports innovative industries and the 4th Industrial Revolution with assets totaling US$234b Its global presence spans 19 countries | Banking | 🇰🇷 Korea | 1,227 | 1954 |
| 82 | [SK On](https://www.tamtam.ai/c/sk-on) (eng.sk-on.com)<br>A global leader in electric vehicle battery development and solutions, offering safe, high-performing products and comprehensive services for sustainable battery lifecycle | Manufacturing | 🇰🇷 Seoul | 1,224 | 2021 |
| 83 | [KB Kookmin Bank 국민은행](https://www.tamtam.ai/c/kb-kookmin-bank) (kbstar.com)<br>A global financial institution based in Seoul, South Korea, offering a range of personal and corporate banking products and services worldwide | Financial Services | 🇰🇷 Seoul | 1,209 | 1963 |
| 84 | [Hanwha Ocean](https://www.tamtam.ai/c/hanwha-ocean) (hanwhaocean.com)<br>A leading premium shipbuilding and offshore company specializing in building high-quality vessels, offshore platforms, and military ships with cutting-edge technology and expertise | Shipbuilding | 🇰🇷 Geoje-si | 1,160 | 1973 |
| 85 | [Daewoong Pharmaceutical](https://www.tamtam.ai/c/daewoong-pharmaceutical) (daewoong.co.kr)<br>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 | 🇰🇷 Seoul | 1,158 | 1945 |
| 86 | [LIG Defense&Aerospace](https://www.tamtam.ai/c/lig-defense-and-aerospace) (ligdefenseaerospace.com)<br>The company develops and produces advanced precision electronic systems, including missile, radar, avionics, communication systems, and more for military and commercial applications globally | Defense and Space Manufacturing | 🇰🇷 Yongin-si | 1,144 | 1976 |
| 87 | [Seoul National University Hospital](https://www.tamtam.ai/c/seoul-national-university-hospital) (snuh.org)<br>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 | 🇰🇷 Seoul | 1,099 | 1885 |
| 88 | [Hyundai Corporation](https://www.tamtam.ai/c/hyundai-corporation) (hyundaicorp.com)<br>Leading trading house specializing in export-import services with diverse products, energy resource development, shipbuilding, and expansion into information technology and communication fields | Wholesale Import and Export | 🇰🇷 Seoul | 1,064 | 1976 |
| 89 | [AVASO Technology Solutions](https://www.tamtam.ai/c/avaso-technology-solutions) (avasotech.com)<br>IT infrastructure services, IT outsourcing, eSolutions, and business process optimization focused on quality, reliability, and global customer support. | IT Services and IT Consulting | 🇰🇷 Denmark | 1,046 | 2012 |
| 90 | [SsD](https://www.tamtam.ai/c/ssd-seoul) (ssdarchitecture.com)<br>An interdisciplinary architecture firm focused on integrating form, energy, and materials to achieve maximum effect through sustainable design solutions | Architecture and Planning | 🇰🇷 Seoul | 1,044 |  |
| 91 | [Osstem](https://www.tamtam.ai/c/osstem) (osstem.com)<br>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 | 🇰🇷 Seoul | 1,043 | 1997 |
| 92 | [Sae-A Trading Co.,Ltd](https://www.tamtam.ai/c/sae-a-trading-co-ltd) (sae-a.com)<br>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 | 🇰🇷 Seoul | 1,030 | 1986 |
| 93 | [INNOCEAN](https://www.tamtam.ai/c/innocean) (innocean.com)<br>A global marketing communication agency managing strategies for Hyundai and over 50 clients, with 31 offices in 16 countries | Advertising Services | 🇰🇷 Seoul | 1,027 | 2005 |
| 94 | [Ssangyong Engineering & Construction Co. Ltd.](https://www.tamtam.ai/c/ssangyong-engineering-and-construction-co-ltd) (ssyenc.com)<br>Construction and engineering company undertaking projects such as buildings, civil engineering, infrastructure, industrial plants, and overseas construction works, with additional services like parking and equipment rental | Construction | 🇰🇷 Seoul | 1,013 | 1977 |
| 95 | [Celltrion Inc.](https://www.tamtam.ai/c/celltrion-inc-incheon) (celltrion.com)<br>Innovative Korean pharmaceutical company pioneering antibody biosimilars and small molecule pharmaceuticals, focusing on global growth and novel healthcare platforms | Biotechnology Research | 🇰🇷 Incheon | 1,011 |  |
| 96 | [KEPCO KPS](https://www.tamtam.ai/c/kepco-kps) (kps.co.kr)<br>A government-owned company in South Korea providing power plant maintenance services domestically and internationally with a strong technical support system | Oil and Gas | 🇰🇷 Naju | 986 | 1974 |
| 97 | [Mirae Asset Securities](https://www.tamtam.ai/c/mirae-asset-securities) (english.securities.miraeasset.com)<br>Mirae Asset Securities is a global investment expert focused on securing successful wealth management and financially secure retirement for clients through innovative market strategies | Investment Banking | 🇰🇷 Jung-gu | 979 | 1999 |
| 98 | [GS Caltex](https://www.tamtam.ai/c/gs-caltex) (gscaltex.com)<br>A leading petroleum company in South Korea, producing high-quality petroleum products and leading economic development through domestic supply and global exports | Oil and Gas | 🇰🇷 Seoul | 979 | 1967 |
| 99 | [TKG TAEKWANG](https://www.tamtam.ai/c/tkg-taekwang) (taekwang.com)<br>A leading OEM athletic footwear producer creating innovative and iconic products for the global market | Sporting Goods Manufacturing | 🇰🇷 Busan | 977 | 1972 |
| 100 | [NH Investment & Securities](https://www.tamtam.ai/c/nh-investment-and-securities-40665924) (nhsec.com)<br>A leading force in Korea's capital market offering innovative financial solutions, with over 50 years of growth and a strong client base | Capital Markets | 🇰🇷 | 966 | 1969 |

## 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.

## More company lists in South Korea

- [The largest companies in South Korea](https://www.tamtam.ai/l/largest-companies-south-korea) (880)
- [Companies with in-house R&D in South Korea](https://www.tamtam.ai/l/r-and-d-companies-south-korea) (229)
- [Manufacturers in South Korea](https://www.tamtam.ai/l/manufacturers-south-korea) (172)
- [Publicly traded companies in South Korea](https://www.tamtam.ai/l/publicly-traded-companies-south-korea) (122)
- [Companies with a mobile app in South Korea](https://www.tamtam.ai/l/companies-with-mobile-app-south-korea) (116)
- [IT Services and IT Consulting companies in South Korea](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-south-korea) (112)
- [Hardware manufacturers in South Korea](https://www.tamtam.ai/l/hardware-companies-south-korea) (98)
- [Corporate groups and holding companies in South Korea](https://www.tamtam.ai/l/holding-companies-south-korea) (98)
- [Education providers in South Korea](https://www.tamtam.ai/l/education-companies-south-korea) (88)
- [Financial services firms in South Korea](https://www.tamtam.ai/l/financial-services-firms-south-korea) (73)
- [Higher Education companies in South Korea](https://www.tamtam.ai/l/higher-education-companies-south-korea) (65)
- [Critical infrastructure operators in South Korea](https://www.tamtam.ai/l/critical-infrastructure-operators-south-korea) (60)
- [Retail chains in South Korea](https://www.tamtam.ai/l/retail-chains-south-korea) (59)
- [AI companies in South Korea](https://www.tamtam.ai/l/ai-companies-south-korea) (55)
- [Computer Games companies in South Korea](https://www.tamtam.ai/l/computer-games-companies-south-korea) (53)
- [Public sector organisations in South Korea](https://www.tamtam.ai/l/public-sector-organisations-south-korea) (48)
- [Energy companies in South Korea](https://www.tamtam.ai/l/energy-companies-south-korea) (47)
- [Financial Services companies in South Korea](https://www.tamtam.ai/l/financial-services-companies-south-korea) (46)
- [Research institutes in South Korea](https://www.tamtam.ai/l/research-institutes-south-korea) (43)
- [Automotive manufacturers and suppliers in South Korea](https://www.tamtam.ai/l/automotive-companies-south-korea) (42)
- [E-commerce companies in South Korea](https://www.tamtam.ai/l/ecommerce-companies-south-korea) (42)
- [Electronics and semiconductor companies in South Korea](https://www.tamtam.ai/l/electronics-companies-south-korea) (38)
- [Chemical companies in South Korea](https://www.tamtam.ai/l/chemical-companies-south-korea) (29)
- [SaaS companies in South Korea](https://www.tamtam.ai/l/saas-companies-south-korea) (28)

## The same list elsewhere in South Korea

- [Multinational companies in Gyeonggi](https://www.tamtam.ai/l/multinational-companies-gyeonggi) (55)
- [Multinational companies in Seoul](https://www.tamtam.ai/l/multinational-companies-seoul) (150)

## The same list elsewhere

- [Multinational companies in the world](https://www.tamtam.ai/l/multinational-companies-in-the-world) (74,925)
- [Multinational companies in Asia](https://www.tamtam.ai/l/multinational-companies-in-asia) (7,275)

---

Source: https://www.tamtam.ai/l/multinational-companies-south-korea