Since 2016, SK Inc. has engaged in active investment activities. Investments included SK Materials (semiconductor materials), SOCAR (car sharing), SM Core (logistics) in 2016; ESR Cayman (logistics), SK Siltron (semiconductor materials), Plutus Capital (hydrogen investment) in 2017; Grab (car sharing), SK Pharmteco (bio contract development and manufacturing) in 2018; and Masan and Vingroup (Vietnam) in 2019, among others.
Furthermore, in 2020, Vice Chairman Jang Dong-hyun of SK Inc. announced plans to transform the company into an “investment-oriented holding company.” The goal was to boldly invest in promising companies in high-growth sectors, realize future capital gains, and reinvest these profits to create a virtuous investment cycle. An industry insider commented, “It was a meaningful declaration to move beyond the simple management of affiliates by a holding company,” adding, “There was even praise that it was a Korean version of Berkshire Hathaway.”
Former CFO Lee Sung-hyung was considered the right person to support these investment activities. He joined SK Innovation, led the corporate finance team at SK Securities, served as head of finance at SK Inc., and was CFO of SK Telecom. From 2017 to 2024, he served as CFO of SK Inc., gaining a deep understanding of the group’s overall businesses.

Kim Ki-dong, Chief Financial Officer (CFO) of SK Inc.
Vice President Kim Ki-dong is classified as a different type of CFO. Unlike his predecessor, who was investment-focused, Kim has stably managed overall finances.
Kim joined SK Engineering & Construction and held positions such as Head of Finance at SK Chemicals, Head of Finance at SK Discovery, and Head of Management Support at SK Chemicals. He has consistently worked within SK Discovery affiliates under Vice Chairman Chey Chang-won’s control. His transfer to SK Inc., the holding company led by Chairman Chey Tae-won, to take charge of financial affairs, was seen as highly unusual.
SK Inc. appears to expect Kim to fulfill the traditional CFO role, namely, maintaining financial soundness through cash liquidity management and debt control. The position of Portfolio Management (PM) head, overseeing investment activities for new growth engines, has been assigned to Vice President Kang Dong-soo. Former CFO Lee Sung-hyung had previously held both the CFO and PM head roles.
As a result, in December 2023, SK Group began a “rebalancing” under the supervision of Vice Chairman Chey Chang-won. This included supporting affiliates with quality assets (SK E&S + SK Innovation, SK Materials Airplus + Essencore → SK Ecoplant) and selling non-core assets (SK Specialty, SK PU Core).
Restructuring some businesses has also yielded financial results. SK Inc.’s Net Debt (Interest-bearing Debt – Cash and Cash Equivalents), which soared to KRW 11 trillion at the end of 2022, decreased to KRW 8.1 trillion by the end of Q1 this year. The company’s Net debt to Total Assets Ratio dropped from 39% to 28%.