Robert Budi Hartono (born 28 April 1941) is an Indonesian tobacco billionaire with a net worth of US$25.3 billion as of September 2023.

[3] Starting from scratch Mr. Oei Wie Gwan bought a small business in the field named Djarum clove gramophone.

After a fire nearly gutted the company in 1963 (Oei died shortly afterward), Djarum back up and modernize their equipment in the factory.

Together with his brother, Michael Hartono, at the age of 22 Robert inherited one of the leading cigarette companies today, Djarum.

[6] Robert Budi Hartono was born in 1941 (as Oei Hwie Tjhong) in the city of Semarang, Central Java, Dutch East Indies.