The economic value created by South Korea’s four largest conglomerates reached 140.2 trillion won ($135.8 billion) in 2013, accounting for 9.7 percent of the country’s GDP, a report by a corporate research firm said Wednesday.

According to CEO Score, analyses based on audits submitted to the state financial regulator last year showed Samsung Group, the country’s No. 1 family-run conglomerate with 19 listed companies, generated economic value worth 68.37 trillion won, or 4.7 percent of the GDP.

This was followed by Hyundai Motor Group, the world’s fifth-largest automotive conglomerate, which posted value-added gains of 37.64 trillion won, or 2.6 percent of the national economy.

LG and SK groups each produced value-added wealth of 19.35 trillion won and 14.88 trillion won.