Multinational companies headquartered in South Korea

Samsung Group (Korean: 삼성; Hanja: 三星; RR: samseong stylised as SΛMSUNG) is a South Korean multinational manufacturing conglomerate headquartered in Samsung Digital City, Suwon, South Korea. It comprises numerous affiliated businesses, most of them united under the Samsung brand, and is the largest South Korean chaebol (business conglomerate). As of 2024, Samsung has the world's fifth-highest brand value.

Hanwha Group (Korean: 한화그룹; Hanja: 韓火그룹; RR: Hanhwa Geurup) is a large business conglomerate (chaebol) in South Korea. Founded in 1952 as Korea Explosives Co. (한국화약주식회사; 韓國火藥株式會社), the group has grown into a large multi-profile business conglomerate, with diversified holdings stretching from explosives—their original business—to energy, materials, aerospace, mechatronics, finance, retail, and lifestyle services. In 1992, the company adopted its abbreviation as its new name: "Hanwha".

CJ Group (Korean: 씨제이) is a South Korean conglomerate holding company, operating internationally. It is one of the largest chaebol headquartered in Seoul, South Korea. It comprises numerous businesses in various industries of food and food service, logistics, pharmaceutics and biotechnology, entertainment and media, Pager and Telephone. CJ Group was originally a branch of Samsung.

Kia Corporation (Korean: 기아, formerly known as Kyungsung Precision Industry (京城精密工業) and Kia Motors Corporation) is a South Korean multinational automobile manufacturer headquartered in Seoul, South Korea. It is South Korea's second largest automobile manufacturer, after its parent company, Hyundai Motor Company, with sales of over 2.8 million vehicles in 2019. As of 2015, Kia is owned by Hyundai, which holds a 33.88% stake valued at just over US$6 billion. Kia in turn is a minority owner of more than twenty Hyundai subsidiaries ranging from 4.9% up to 45.37%, totaling more than US$8.3 billion.

Samsung Electronics Co., Ltd. (SEC; stylised as SΛMSUNG; Korean: 삼성전자; RR: Samseong Jeonja; lit. Tristar Electronics) is a South Korean multinational major appliance and consumer electronics corporation founded on 13 January 1969 and headquartered in Yeongtong District, Suwon, South Korea. It is currently the pinnacle of the Samsung chaebol, accounting for 70% of the group's revenue in 2012, and has played a key role in the group's corporate governance due to cross ownership. It is majority-owned by foreign investors.

LG Corporation (or LG Group), formerly known as Lucky-Goldstar, is a South Korean multinational conglomerate founded by Koo In-hwoi and managed by successive generations of his family. It is the fourth-largest chaebol (family-run conglomerate) in South Korea. Its headquarters are in the LG Twin Towers building in Yeouido-dong, Yeongdeungpo District, Seoul. LG makes electronics, chemicals, household appliances, and telecommunications products and operates subsidiaries such as LG Electronics, Zenith, LG Display, LG Uplus, LG Innotek, LG Chem, and LG Energy Solution in over 80 countries. According to the “Top 500 Global Brands” released by British consulting firm Brand finance, LG's brand value ranking rose from 90th to 83rd from the previous year.

GS25 (Korean: 지에스25) is a South Korean chain of convenience stores operated and owned by GS Retail, a subsidiary company of the GS Group. The headquarters of the company are located at the GS Tower in Gangnam-gu, Seoul. As of June 9, 2020, GS25 operates 13,899 stores.

Samyang Roundsquare Co., Ltd. (Korean: 삼양라운드스퀘어) is an international South Korean food manufacturer and the first instant ramen company in South Korea. Samyang was founded on September 15, 1961, by Jeon Jung Yoon. In 1963, Samyang debuted the first Korean instant noodle.

LG Chem Ltd. (Korean: LG화학), often referred to as LG Chemical, is the largest Korean chemical company and is headquartered in Seoul, South Korea. It was the 9th largest chemical company in the world by sales in 2021. It was first established as the Lucky Chemical Industrial Corporation, which manufactured cosmetics. It is now solely a business-to-business company (consumer products division was spun off into LG Household & Health Care).

Nexon Co., Ltd. (formerly Korean: 주식회사 넥슨) is a South Korean video game developer and publisher. It develops and publishes titles including MapleStory, Crazyracing Kartrider, Sudden Attack, Dungeon & Fighter, and Blue Archive. Headquartered in Japan, the company has offices in South Korea, the United States, Taiwan and Thailand.