Justarina Sinta Naiborhu

G.K. Goh Holdings Ltd. engages in the management and owning of businesses and diverse portfolio of investments. It operates through the following segments: Investment Holding, Corporate Services, and Aged Care Services. The company was founded by Geok Khim Goh in 1979 and is headquartered in Singapore.

PT CGS-CIMB Sekuritas Indonesia is the Indonesian brokerage subsidiary of CIMB Securities International Pte Ltd., ultimately held by CIMB Group Holdings Bhd. (KL: 1023) in Malaysia. Established in 1991, the firm provides institutional equities sales, trading and research. In addition to equities trading, they also offer corporate finance advisory and investment banking services including banking products and services, investment banking, equities brokerage, research coverage and asset management.

PT Toba Sejahtra provides coal mining services. Sumardi has been the CEO of the Indonesian company since 2008.

PT Principal Asset Management (Principal Indonesia) is an asset management firm headquartered in Jakarta, Indonesia. The firm is a joint venture between CIMB Group Holdings Berhad and Principal Financial Group in 2018. Formerly known as PT CIMB-Principal Asset Management, the firm was founded in 2018. Principal Indonesia offers a wide variety of solutions to help people and companies build, protect, and advance their financial well-being with their discretionary mandates and asset management expertise.