Robert Budi Hartono (Oei Hwie Tjhong) is an Indonesian businessman, the billionaire Patriarch and Co-owner of the Djarum Group, a massive conglomerate spanning tobacco (Djarum cigarettes), banking (Bank Central Asia - BCA), and telecommunications. His wealth is generational, tied to the empire founded by his late father, Oei Wie Gwan (d. 1963), in 1951.

Hartono's career is defined by generational stewardship and executive leadership in the tobacco, finance, and industrial sectors. His structural role is tied to managing the family's assets across diverse sectors, focusing on long-term stability and financial governance (via BCA). He and his older brother, Michael Hartono, are consistently ranked as the richest people in Indonesia.

• Djarum Group (Patriarch & Co-owner): The core private asset, a massive conglomerate spanning tobacco (Djarum), banking (Bank Central Asia - BCA), and telecommunications. He and his brother Michael Hartono control the empire.
• Bank Central Asia (BCA) (Major Shareholder): Indonesia's largest private bank (the family holds a substantial stake).
• Industrial Focus: His success is built on scale manufacturing of kretek (clove) cigarettes and financial services dominance.
• Sports Focus: The family is a major patron of Badminton (through the PB Djarum club).

R. Budi Hartono's strategic leadership transformed Djarum into a global giant. He and his brother, Michael Hartono, assumed control after their father's death, successfully diversifying the company beyond tobacco. Their structural contribution is immense: orchestrating the strategic acquisition of a controlling stake in Bank Central Asia (BCA) during the Asian Financial Crisis (1997–1998), which became the largest and most valuable private bank in Indonesia.

His wealth is secured by the colossal, long-term, stable profitability of the tobacco, banking, and financial services sectors.

R. Budi Hartono's social impact is structural, stemming from Djarum Group's role as a massive employer and foundational provider of essential banking and consumer goods in Indonesia. His commitment to education and sports (supporting PB Djarum badminton club and various educational scholarships) provides a major structural contribution to national development. His wealth is a barometer of the success of the modern Indonesian economy.

His personal philanthropy supports various community and educational initiatives.

R. Budi Hartono maintains the professional, composed style of a corporate executive. His attire is consistently formal and high-quality, favoring tailored business suits or traditional Indonesian attire. His aesthetic reflects serious authority and stability, typical of a patriarch in the Asian chaebol-like system.

Residing in Jakarta, Indonesia, his luxury is the immense security and financial reward derived from his multi-billion dollar fortune. His life is dedicated to corporate governance, investment strategy, and industrial scale.