This file photo shows Samsung Electronics Co.'s headquarters in Seocho, southern Seoul. (Yonhap)

Big companies in South Korea increased their investments in research and development activities last year despite decreased earnings, a corporate data tracker said Tuesday.

Their combined R&D investments rose 9.4 percent to 73.42 trillion won ($54 billion) in 2023 from 67.14 trillion won a year earlier, according to a recent survey of 224 firms by the data tracker CEO Score.

They suffered declines in sales and operating profit due to an economic slowdown but they executed their planned R&D spending for future growth, the survey showed.

Samsung Electronics topped others in terms of the value of R&D investments. It spent 28.35 trillion won last year, up 14 percent from a year ago.

The country's top 10 conglomerates, including LG Electronics Inc., SK hynix Inc., Hyundai Motor Co., LG Chem Ltd., Hyundai Mobis Co. and Kakao Corp. were among the 224 companies. They accounted for more than 70 percent of the overall R&D investments by the surveyed firms, CEO Score said. (Yonhap)