| # | Company | Employees |
|---|---|---|
| 1 | 8,284 | |
| 2 |
SK Telecomsktelecom.com
Leading telecommunications company focusing on AI, media, cloud, and connected intelligence to enhance customer experience and enterprise value. |
7,368 |
| 3 |
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 |
| 4 |
Korean Airkoreanair.com
Operating a modern fleet, serving 120 cities globally, providing passenger and cargo air transport with high safety and service standards. |
3,648 |
| 5 | 3,553 | |
| 6 |
Shinhan Bankshinhan.com
A leading South Korean bank offering retail, corporate, and investment banking services to millions of customers domestically and across multiple countries |
3,147 |
| 7 |
LG유플러스 (LG Uplus)lguplus.com
Provider of mobile communication, internet services, and digital solutions focusing on innovative technology and customer connectivity enhancement. |
2,719 |
| 8 |
Hana Bankkebhana.com
A leading bank in South Korea with a focus on ESG management, low-carbon finance, and digital innovation to become a global financial group |
1,788 |
| 9 |
Woori Bankwooribank.com
This company offers a comprehensive range of commercial banking services including deposits, loans, securities, trust accounts, corporate finance, and more |
1,441 |
| 10 |
Korea Hydro & Nuclear Power (KHNP)khnp.co.kr
A leading power generation company in South Korea, providing nuclear, hydro, pumped-storage, and renewable energy solutions domestically and internationally |
1,417 |
| 11 |
Samsung Medical Centersamsunghospital.com
A leading hospital and cancer center in Korea with cutting-edge technology, patient-centered care, top medical staff, research, education, and future-focused expansion plans |
1,401 |
| 12 |
Asiana Airlinesflyasiana.com
An airline based in Seoul, Korea, operating over 90 routes to 77 cities in 21 countries, prioritizing customer satisfaction through safety and excellent service |
1,283 |
| 13 |
Asan Medical Center (AMC)eng.amc.seoul.kr
Established by Asan Foundation with a mission to provide world-class medical care, AMC excels in organ transplantation, heart disease, cancer treatment, and healthcare services |
1,227 |
| 14 |
Korea Development Bankkdb.co.kr
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 |
1,227 |
| 15 |
KB Kookmin Bank 국민은행kbstar.com
A global financial institution based in Seoul, South Korea, offering a range of personal and corporate banking products and services worldwide |
1,209 |
| 16 |
카카오뱅크 Kakaobankkakaobank.com
A bank that started for individuals, now for everyone Changing the way people send, receive, collect, and spend money Offering various job opportunities |
1,148 |
| 17 |
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 |
| 18 | 986 | |
| 19 |
Mirae Asset Securitiesenglish.securities.miraeasset.com
Mirae Asset Securities is a global investment expert focused on securing successful wealth management and financially secure retirement for clients through innovative market strategies |
979 |
| 20 |
GS Caltexgscaltex.com
A leading petroleum company in South Korea, producing high-quality petroleum products and leading economic development through domestic supply and global exports |
979 |
| 21 |
NH Investment & Securitiesnhsec.com
A leading force in Korea's capital market offering innovative financial solutions, with over 50 years of growth and a strong client base |
966 |
| 22 |
HANWHA LIFE CO., LTD.company.hanwhalife.com
A leading life insurance company in South Korea, specializing in innovative products and services, digital capabilities, and global expansion in fintech and big data |
896 |
| 23 |
Industrial Bank of Koreaibk.co.kr
A state-owned financial institution in South Korea focused on providing services to SMEs and industrial sectors, supporting economic growth |
875 |
| 24 |
Samsung Life Insurancesamsunglife.com
A leading life insurance company in South Korea, committed to protecting lives and assets, promoting family values, and global growth through innovation and community support |
817 |
| 25 |
우리은행wooribank.com
Constantly leading innovation and change in the finance industry in South Korea, presenting a new vision for the future |
815 |
| 26 |
Samsung Fire & Marine Insurancesamsungfire.com
A leading non-life insurance company, committed to client satisfaction and financial soundness, with a global presence and focus on innovation and competitiveness |
801 |
| 27 |
Hyundai Capital Services
Global financial arm of Hyundai Motor Group offering auto, corporate, and industrial financing worldwide, focusing on digital transformation and partnerships for business effectiveness and growth |
759 |
| 28 |
Bank of Koreabok.or.kr
Established as a central bank in 1950, it aims for price stability through monetary policy, overseeing payment systems, managing foreign reserves, and supervising financial institutions |
736 |
| 29 |
Korea Investment & Securities Co., Ltdsecurities.koreainvestment.com
A leading financial company under Korea Investment Holdings, offering diversified services in brokerage, asset management, investment banking, and sales & trading |
709 |
| 30 |
S-OIL Corporations-oil.com
An oil refining company with integrated operations in lubricants and petrochemicals, ensuring stable crude oil imports and superior competitiveness in the market |
666 |
| 31 |
현대카드·현대커머셜(HyundaiCard·HyundaiCommercial)newsroom.hcs.com
Striving for innovation, providing new value to customers, and transforming into a digital company with services like PLCC, AI, blockchain, and customized solutions |
660 |
| 32 |
케이뱅크(Kbank)kbanknow.com
A financial services company that aims to transform our financial lives with practical solutions, fostering growth opportunities in a creative environment |
654 |
| 33 |
Incheon International Airport Corporationairport.kr
The company specializes in airport construction, operation, and management, as well as development of neighboring areas and consulting services in the industry |
589 |
| 34 |
Severance Hospitalyuhs.or.kr
Pioneering medical institution founded in 1885, leading in healthcare, education, and research Integral to Korean health and medical history |
585 |
| 35 |
Jeju Airjejuair.net
A fast-growing Low Cost Carrier in Korea operating Boeing 737-800s with domestic and international destinations, established in 2005 |
579 |
| 36 |
Toss Bank(토스뱅크)toss.im
The team aims to establish a new internet bank in South Korea for financial innovation, offering customer-centric services to underserved communities |
575 |
| 37 |
KYOBO Life Insurance 교보생명kyobo.co.kr
A company that rewrites the history of life insurance, creating new paths ahead of customer needs, and understanding the changing times |
567 |
| 38 |
KRX | Korea Exchangeglobal.krx.co.kr
The organization works towards establishing a reliable capital market, providing trustworthy services, and developing effective infrastructure for sustainable growth |
308 |
| 39 |
NH Investment & Securitiesnhis.co.kr
A leading force in Korea's capital market, providing innovative financial solutions to clients for over 50 years with a global presence and strong financial performance |
300 |
| 40 |
K-water Water Resources Cooperationor.kr
The company specializes in constructing, operating, and managing water resource facilities, metropolitan waterworks, industrial complexes, renewable energy facilities, and providing contracted-out waterworks and sewage services |
253 |
| 41 |
Hanwha Investment & Securitieshanwhawm.com
A trusted financial investment partner offering asset management services, brokerage, wealth management, and innovative digital financial platforms domestically and overseas |
185 |
| 42 |
Hana Financial Investmenthanaw.com
Offering client-centric financial solutions since 1970, we provide award-winning services in asset management, wealth management, and investment banking in Asia |
108 |
| 43 |
OK금융그룹ok.recruiter.co.kr
A global financial services group in South Korea with around 20 subsidiaries, expanding internationally with a focus on consumer finance and banking |
45 |
Turn this list into pipeline
Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.
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 Oct 24, 2026.
More company lists in South Korea
- The largest companies in South Korea 815
- IT Services and IT Consulting companies in South Korea 101
- Manufacturers in South Korea 79
- Publicly traded companies in South Korea 67
- Financial services firms in South Korea 64
- Higher Education companies in South Korea 64
- Education providers in South Korea 50
- Computer Games companies in South Korea 48
- Financial Services companies in South Korea 46
- Hardware manufacturers in South Korea 45
- Retail chains in South Korea 38
- Automotive manufacturers and suppliers in South Korea 34
- Public sector organisations in South Korea 31
- Energy companies in South Korea 30
- Research institutes in South Korea 30
- AI companies in South Korea 28
- Motor Vehicle Manufacturing companies in South Korea 27
- SaaS companies in South Korea 27