By Kang Yoon-seung
SEOUL, June 24 (Yonhap) -- The market share of South Korea's top 20 listed firms on the main bourse edged down in June from end-2012, with market behemoth Samsung Electronics Co. retaining the top spot, data showed Monday.
The market cap of the top 20 listed companies came to 538.3 trillion won (US$467.2 billion) as of June 20, or 50.08 percent of the combined market on the main bourse, according to the data compiled by the Korea Exchange (KRX).
The KRX said the number is down 0.15 percentage points from the end of 2012 when it reached 50.23 percent at 579.8 trillion won.
Samsung Electronics Co., the world's top smartphone maker, took the top place with a market cap of 195.7 trillion won, or 18.21 percent of the total.
Hyundai Motor Co., the country's No. 1 carmaker, ranked second with a market cap of 45.7 trillion won, or 4.25 percent of the total, trailed by top steelmaker POSCO with 2.51 percent and Hyundai Mobis with 2.37 percent.
Top chipmaker SK hynix moved five notches up from end-2012 to rank sixth, with a market cap of 21.5 trillion won, or 2 percent of the total.
On the secondary tech-laden KOSDAQ market, the top 20 firms took up 22.24 percent of the total market cap, climbing 0.02 percentage points from the end of last year.
Celltrion Inc., a leading bio-pharmaceutical firm, took the top spot with a market cap of 3.4 trillion won, or 2.87 percent of the total, the bourse operator added.
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