The electronics and semiconductor sector in South Korea is dominated by large groups and established firms. Samsung Electronics, a global technology leader, innovates in diverse areas from smartphones to medical devices. LG Electronics focuses on home appliances and digital signage. SK hynix is a major producer of DRAM and NAND Flash memory chips, while LG Display and Samsung Display specialize in TFT-LCD and OLED panels. Hanwha Systems contributes with defense electronics and ICT solutions.
Most of these companies were founded between the 1960s and 1980s, indicating a mature industrial base. A significant concentration of headquarters is observed in Seoul, Suwon-Si, and Yongin-si, highlighting these areas as key hubs for the country's electronics and semiconductor industry.
| # | 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 |
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 |
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 | |||
| 4 |
SK hynixskhynix.com
Leading global producer of DRAM and NAND Flash memory chips, providing advanced semiconductor solutions for diverse IT product demands worldwide. |
8,276 | |||
| 5 |
LG Displaylgdisplay.com
Manufacturing display panels for TVs, computers, automobiles, tablets, and mobile devices in facilities across Korea, China, and Vietnam. |
6,139 | |||
| 6 |
Samsung Displaysamsungdisplay.com
Global leader providing cutting-edge display solutions with OLED and QD-OLED technology for smartphones, TVs, laptops, monitors, smartwatches, VRs, game consoles, and automotive applications. |
3,443 | |||
| 7 |
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 | |||
| 8 |
Samsung Electro-Mechanicssamsungsem.com
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. |
3,077 | |||
| 9 |
SK Groupeng.sk.com
Investment and development in manufacturing, EV batteries, hydrogen energy, pharmaceuticals, semiconductors, focusing on growth, governance, and social impact. |
2,368 | |||
| 10 |
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 | |||
| 11 |
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 | |||
| 12 |
SK ecoplantskecoplant.com
Leading environmental services operator focused on water treatment, waste management, e-waste, renewable energy, and building a circular economy for a better world |
684 | |||
| 13 |
KECkeccorp.com
A global semiconductor company established in 1969, specializing in non-memory semiconductor products such as transistors, diodes, ICs, MOSFETs, and more |
648 | |||
| 14 | 645 | ||||
| 15 |
KETI(Korea Electronics Technology Institute)keti.re.kr
A world-leading research institute specializing in technology convergence, green IT, and green growth, supporting SMEs and venture businesses with technological assistance and marketing aid |
639 | |||
| 16 |
SOLUMsolum-group.com
A global company specializing in power suppliers, tuners, and electronic shelf labels with locations in South Korea, USA, and Germany |
585 | |||
| 17 |
Hanwha Visionhanwhavision.com
A leading provider in the global video surveillance industry, specializing in optical design, image processing, cybersecurity, AI, and cloud technologies |
550 | |||
| 18 |
LX Semiconlxsemicon.com
A leading fabless company in Korea specializing in system IC technology for IT displays, expanding globally with a diverse product portfolio |
540 | |||
| 19 | 495 | ||||
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. | |||||
| 20 |
Seoul Semiconductorseoulsemicon.com
Develops and commercializes light emitting diodes for automotive, illumination, specialty lighting, and backlighting markets, holding numerous patents and offering innovative products. |
491 | |||
| 21 |
HL Klemovehlklemove.com
HL Klemove is a new company formed by merging two industry leaders in autonomous driving and automotive components, promising to provide freedom of movement and improved quality of life |
451 | |||
| 22 | 416 | ||||
| 23 |
Heesung Electronics LTD.hselec.co.kr
A specialized electronics manufacturer producing core display components like BLU, TSP, and LED, with a focus on technological advancements and global expansion |
412 | |||
| 24 |
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 | |||
| 25 |
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 | |||
| 26 | 363 | ||||
| 27 |
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 | |||
| 28 |
MAYmay-display.com
Specializing in manufacturing and designing micro display panels, optic engines, and other electronic products, offering a one-stop total solution for clients |
338 | |||
| 29 |
Samjin Co., Ltdsamjin.com
A global leader in smart control technology for the connected home, offering innovative solutions for controlling entertainment devices and home systems |
321 | |||
| 30 |
Telechips, Inc.telechips.com
A leader in semiconductor technology, specializing in Automotive Infotainment and STB, offering high-security, power-efficient solutions with global presence and innovative products |
318 | |||
| 31 |
Rebellionsrebellions.ai
Specializing in enabling accelerated generative AI at scale through innovative technology solutions |
315 | |||
| 32 |
Amkor Technology Koreaamkor.recruiter.co.kr
A leading provider of high-quality semiconductor packaging and testing services, dedicated to customer satisfaction, engineering expertise, and mass production capabilities |
312 | |||
| 33 |
Magnachip Semiconductor
A leading designer and manufacturer of analog and mixed-signal semiconductor solutions for various industries with extensive engineering and patent portfolio |
267 | |||
| 34 | 240 | ||||
| 35 | 84 | ||||
| 36 |
Global ZEUS (ZEUS Co., Ltd.)globalzeus.com
The company provides high-quality solutions for the Semiconductor, Automation, LCD, LED, renewable energy, and IT industries through innovative products and exceptional customer support |
44 | |||
| 37 |
AMOSENSEamosenseiot.com
Korean IoT device maker specializing in advanced electronic components and IoT solutions for various industries, with a focus on innovation and global leadership |
19 | |||
| 38 |
Will Technologywilltechnology.co.kr
Specializing in supporting testing solutions and instruments for the semiconductor and PCB industries |
18 | |||
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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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