The companies listed in Gyeonggi are primarily large firms in technology and manufacturing. Many are subsidiaries or affiliates of major Korean conglomerates, with a strong focus on electronics, automotive components, and digital services. This includes Samsung Electronics, a global leader in consumer electronics; NAVER Corp, an ICT company known for its search portal and messenger services; and HL Mando, an automotive parts manufacturer.
A notable pattern is the concentration of headquarters in cities like Seongnam and Suwon-Si, indicating key industrial and technological hubs within Gyeonggi. The list also shows a mix of companies founded across several decades, from the 1940s to the 2010s, reflecting sustained industrial development.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Samsung Electronicssamsung.com
A global technology leader, constantly innovating in TVs, smartphones, wearables, appliances, medical devices, and more Embracing diversity and creativity for growth |
287,000 | |||
| 2 |
Samsung Mobilesamsung.com
This company specializes in providing secure and highly productive mobile solutions for enterprises, focusing on Android security and productivity on Samsung Galaxy devices worldwide |
19,596 | |||
| 3 |
NAVER Corpnavercorp.com
A global ICT company offering search portal, messenger, camera app, webtoon, metaverse platform, AI, robotics, and mobility innovations for shared growth |
5,121 | |||
| 4 |
Samsung SDIsamsungsdi.com
Development and production of innovative technology products with cutting-edge features, focusing on creativity and continuous improvement since 1970. |
4,080 | |||
| 5 |
HL Mandohlmando.com
A leading automotive parts company focused on developing cutting-edge technology and quality parts for safe vehicles on a global scale |
3,561 | |||
| 6 |
Hankook Tirehankooktire.com
Manufacture and supply high-quality tires globally, focusing on innovation, premium brands, and sustainable ESG management practices. |
2,083 | |||
| 7 |
LINE Plus Corplinepluscorp.com
A global mobile platform company offering a variety of services like search, messaging, media, commerce, fintech, and AI to create amazing everyday experiences |
1,634 | |||
| 8 |
LS Cable & Systemlscns.co.kr
A global cable solutions provider offering state-of-the-art products, engineering services, and global production capacity to power authorities and carriers worldwide |
1,630 | |||
| 9 |
NEXON KOREAcompany.nexon.com
Develops and services over 40 online games across various genres in more than 190 countries worldwide, expanding gaming experiences. |
1,579 | |||
| 10 |
HYUNDAI TRANSYShyundai-transys.com
A global automotive parts supplier specializing in powertrain and seating components for Hyundai and Kia Motors, with operations in Asia, Europe, and the Americas |
1,566 | |||
| 11 | 1,468 | ||||
| 12 |
Hyundai Rotemhyundai-rotem.co.kr
A diversified company within Hyundai Motor Group providing innovative and sustainable mobility solutions in the railway, defense, and plant & machinery systems sectors globally |
1,442 | |||
| 13 |
Dankook Universitydankook.ac.kr
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 |
1,260 | |||
| 14 |
KOICAkoica.go.kr
An independent agency founded in 1991, dedicated to implementing grant aid programs across various sectors to promote global development and cooperation |
1,230 | |||
| 15 |
LIG Defense&Aerospaceligdefenseaerospace.com
The company develops and produces advanced precision electronic systems, including missile, radar, avionics, communication systems, and more for military and commercial applications globally |
1,144 | |||
| 16 |
LS Automotivelsautomotive.com
A global vehicle components company with world-class quality, offering career opportunities, focused on customer satisfaction, sustainability, and innovation in automotive technologies |
938 | |||
| 17 |
MegazoneCloudmegazone.com
A cloud technology provider offering consulting services and solutions for businesses' digital transformation, with a focus on Amazon Web Services |
916 | |||
| 18 |
Ajou Universityajou.ac.kr
A higher education institution located in gyeonggi-do, South Korea, specializing in providing advanced education and academic programs |
898 | |||
| 19 |
LS ELECTRICls-electric.com
This company provides power systems and automated solutions for efficiency, sustainability, and clean energy, focusing on smart factories and energy solutions |
881 | |||
| 20 |
POSCO DXposcodx.com
A leading provider of total smart industry IT solutions, POSCO ICT offers engineering, automation, system integration, and IT outsourcing services with a focus on green growth and innovation |
844 | |||
| 21 |
AhnLab, Inc.ahnlab.com
A global cybersecurity company founded in 1995, offering comprehensive protection for endpoints, networks, transactions, and essential services with best-of-breed threat prevention |
704 | |||
| 22 |
GC Biopharma (GC녹십자)gcbiopharma.com
Biopharmaceutical company based in South Korea specializing in protein therapeutics and vaccines, with a focus on quality healthcare solutions for over 50 years |
660 | |||
| 23 |
Ajou Universityajou.ac.kr
A leading research university in Korea with 10 colleges, focusing on humanity, truth-seeking, and global unity Located in Suwon, near Seoul |
637 | |||
| 24 |
TMAXSOFTtmaxsoft.com
A global software innovator offering modernization solutions for enterprise CIOs, specializing in enterprise RDBMS, legacy rehosting, and web application servers |
593 | |||
| 25 |
Cello Square by Samsung SDS Globalcello-square.com
An innovative IT solution provider in Korea offering integrated logistics solutions, business process outsourcing, and a logistics marketplace with cutting-edge technology |
589 | |||
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. | |||||
| 26 |
Humaxhumaxmobility.com
A global provider of total mobility solutions, advanced technologies, and premium content delivery systems for operators, consumers, and vehicle brands worldwide |
587 | |||
| 27 |
SOLUMsolum-group.com
A global company specializing in power suppliers, tuners, and electronic shelf labels with locations in South Korea, USA, and Germany |
585 | |||
| 28 |
Hanwha Visionhanwhavision.com
A leading provider in the global video surveillance industry, specializing in optical design, image processing, cybersecurity, AI, and cloud technologies |
550 | |||
| 29 |
KGMkg-mobility.com
A leading Korean automotive manufacturer known for innovative SUVs and luxury sedans, with technical cooperation for competitive SUV production |
505 | |||
| 30 |
SK chemicalsskchemicals.com
The company manufactures chemical products including PETG and PET resins for various industries, as well as life science products like anti-cancer agents and vaccines |
491 | |||
| 31 |
HD Construction Equipmenthd-ce.com
A leading manufacturer of construction equipment, engines, and utility equipment, supplying a range of products for various industries globally |
469 | |||
| 32 |
HD Hyundai Construction Equipmenthd-hyundaice.com
Specialized manufacturer of construction equipment including excavators, wheel loaders, backhoe loaders, and skid loaders for construction and material handling |
416 | |||
| 33 |
Rayraymedical.com
A global leader in dental imaging solutions, Ray Co, Ltd specializes in CBCT technology and digital dentistry products for global markets |
378 | |||
| 34 |
Hyundai Kefico Corporation (현대케피코)hyundai-kefico.com
The company designs, verifies, calibrates, and manufactures advanced electronic control systems for vehicles, with a focus on safety and efficiency |
374 | |||
| 35 |
Samsung Foundrysamsung.com
Specializing in advanced process and design technologies, Samsung Foundry offers a range of foundry capabilities, design services, and intellectual property solutions for high-volume manufacturing projects |
372 | |||
| 36 |
HD Korea Shipbuilding & Offshore Engineering Co., Ltd. (HD KSOE)hdksoe.co.kr
A shipbuilding business cluster focused on becoming a technology-oriented company with world-class R&D and engineering capabilities in the marine mobility industry |
367 | |||
| 37 |
KAON GROUPkaongroup.com
Development and manufacturing of digital connectivity devices and services for PayTV and Broadband industries, offering integrated end-to-end solutions worldwide. |
366 | |||
| 38 |
SD BIOSENSOR INCsdbiosensor.com
The company is dedicated to enhancing human health through the creation of groundbreaking products, prioritizing sustainable growth and community well-being |
365 | |||
| 39 |
Intellian Technologiesintelliantech.com
A global leader in satellite antenna systems, providing connectivity solutions for various industries, focusing on simplicity, innovation, and customer satisfaction |
348 | |||
| 40 |
HD Hyundai Electric Co., Ltd.hd-hyundaielectric.com
A global provider in heavy electrical machinery, transitioning to digital solutions for the evolving power market with focus on ICT convergence and smart factory initiatives |
342 | |||
| 41 |
LS Mtronlsmtron.com
The company operates in machinery and components sectors, producing tractors, injection molding systems, track shoes for battle vehicles, and electronic components |
338 | |||
| 42 |
HD Hyundaihd-hyundai.com
Global heavy industries company providing innovative solutions in shipbuilding, marine engineering, oil refining, petrochemicals, and energy management through its three core businesses |
336 | |||
| 43 |
NAVER Z (ZEPETO)naverz-corp.com
Platform for creating and sharing avatars in a virtual social universe, connecting millions of users with brands, IP, and celebrities |
324 | |||
| 44 |
MIDAS IT Co., Ltd.midasuser.com
Specializing in civil/structural/mechanical engineering software development and analysis, providing engineering consulting services with a team of experienced developers and engineers |
321 | |||
| 45 |
Pearl Abysspearlabyss.com
Global game developer creating extraordinary gameplay experiences with Black Desert MMORPG franchise, serving 40 million users worldwide on PC, mobile, and console |
314 | |||
| 46 |
Huons Globalhuonsglobal.com
A leading healthcare group with a focus on pharmaceuticals, medical devices, health functional foods, and ESG sustainability practices for a better future |
308 | |||
| 47 |
WEVERSE COMPANYweverse.co
A pioneering company in entertainment and media platforms, developing global services for artists and fans through innovative digital platforms and commerce services |
278 | |||
| 48 |
Kakao Gamesrecruit.kakaogames.com
A global game publisher with a diverse portfolio catering to all ages, known for titles like Black Desert Online, Path of Exile, and PUBG |
219 | |||
| 49 |
Suprema Inc.supremainc.com
Global innovator in access control and AI-based biometric solutions, simplifying enterprise security with facial recognition, fingerprint authentication, mobile credentials, and more |
210 | |||
| 50 |
Erborianerborian.com
Combines Korean beauty rituals and science to create effective skincare products promoting natural beauty and self-esteem through visible results. |
146 | |||
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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.
More company lists in Gyeonggi
- The largest companies in Gyeonggi 147
- Companies with in-house R&D in Gyeonggi 56
- Manufacturers in Gyeonggi 43
- Hardware manufacturers in Gyeonggi 31
- IT Services and IT Consulting companies in Gyeonggi 31
- Companies with a mobile app in Gyeonggi 30
- Publicly traded companies in Gyeonggi 26