Their total sales increased 7 per cent on-year to 779.5 trillion won from 728.6 trillion won over the cited period, reports Yonhap news agency. The corporations cover those that have disclosed their quarterly financial statements for the first quarter as of Wednesday. The country's two leading chipmakers, Samsung Electronics and SK hynix led the overall increase for the second quarter on rising demand for AI semiconductors, such as high-bandwidth memory (HBM) from U.S. tech giants like Nvidia Corp. Samsung Electronics, the world's largest memory chipmaker, posted 10.4 trillion won in operating profit for the three-month period ending June, soaring from 668.5 billion won a year earlier. This solidified its position as the company with the highest quarterly operating profit in South Korea.