# SK hynix overtakes Samsung in market value amid AI-driven chip boom > Source: > Published: 2026-06-22 07:37:03+00:00 SK hynix overtook Samsung Electronics to claim the top position on KOSPI by market capitalization on Monday, ending Samsung's reign of 25 years and seven months as the benchmark index's most valuable listed company. KOSPI, meanwhile, edged higher to close above the 9,100 mark, setting a new record high on a closing basis. According to the Korea Exchange, SK hynix recorded a market capitalization of about 2,080.38 trillion won ($1.35 trillion), surpassing Samsung Electronics’ 2,066.66 trillion won by about 13.72 trillion won on a closing price basis. Samsung Electronics first claimed KOSPI's top spot by market capitalization on July 29, 1999, and had maintained its dominance uninterrupted since Nov. 21, 2000. The change at the top comes amid a rally in the semiconductor sector fueled by surging demand tied to the artificial intelligence (AI) boom. While both Samsung Electronics and SK hynix have benefited from the trend, SK hynix has delivered markedly stronger stock performance, ending Samsung's long-standing reign as the market's most valuable company. Samsung's shares have risen nearly