Samsung Electronics Co., Ltd. (Korean: 삼성전자; Hanja: 三星電子; RR: Samsung Jeonja; literally 'tristar electronics') is a South Korean multinational electronics company headquartered in Suwon, South Korea. Due to some circular ownership, it is the flagship company of the Samsung chaebol, accounting for 70% of the group's revenue in 2012. Samsung Electronics has assembly plants and sales networks in 80 countries and employs around 308,745 people. It is the world's largest manufacturer of consumer electronics and semiconductors by revenue. As of June 2018,[update] Samsung Electronics' market capitalization stood at US$325.9 billion. Samsung is a major manufacturer of electronic components such as lithium-ion batteries, semiconductors, chips, image sensors, camera modules and flash memory devices for clients such as Apple, Sony, HTC and Nokia. It is the world's largest manufacturer of mobile phones and smartphones, started with the original Samsung Solstice and later, the popularity of its Samsung Galaxy line of devices. The company is also a major vendor of tablet computers, particularly its Android-powered Samsung Galaxy Tab collection, and regarded for developing the phablet market through the Samsung Galaxy Note family of devices. It has also developed 5G capable smartphones through the Galaxy S10 and Galaxy Note 10 and foldable phones through the Galaxy Fold. Samsung has been the world's largest television manufacturer since 2006, and the world's largest manufacturer of mobile phones since 2011. It is also the world's largest memory chips manufacturer. In July 2017, Samsung Electronics overtook Intel as the largest semiconductor chip maker in the world. Samsung Electronics is the world's second largest technology company by revenue. In 2012, Kwon Oh-hyun was appointed the company's CEO but announced in October 2017 that he would resign in March 2018, citing an "unprecedented crisis". From March 2018 on, the company maintains a 3-CEO layout with Ki Nam Kim, Hyun Suk Kim, and Dong Jin Koh. It also has a separate CEO for Southeast Asia from 2015, HC Hong.