Entrepreneur Michael Bambang Hartono passed away on March 19, 2026, at the age of 86. Introduction Michael Bambang Hartono was an Indonesian entrepreneur and billionaire, known as co-owner of Djarum and an investor in major companies such as BCA and Como 1907. His passing has garnered widespread attention due to his influence on the Indonesian business sector and his substantial wealth. Career and Achievements Hartono inherited the family business Djarum in 1963 from his father Oei Wie Gwan. Over the decades, he transformed the company into a diversified conglomerate with activities in tobacco, finance, electronics, and hospitality. He founded Polytron, which grew into a well-known electronics brand in Indonesia. Under his leadership, the family acquired significant stakes in Bank Central Asia, which became one of the country's largest banks. He inherited Djarum in 1963 and became co-owner of the cigarette manufacturer, a core activity of the family empire. Founder of Polytron, an Indonesian electronics company that provided consumers with affordable electronic products. Major shareholder and influential investor in BCA, helping the bank grow into a leading financial institution. Owner of Como 1907, part of the hospitality activities within the conglomerate. Frequently listed on the Forbes Billionaires List; his net worth was estimated at $25.1 billion in December 2024. His business strategy reflected long-term growth and diversification, and he is regarded as one of the architects of modern Indonesian enterprise. The Hartono family was among the most influential entrepreneurial families in Indonesia. Private Life Michael Bambang Hartono was born on October 2, 1939, in Kudus, Central Java, Dutch East Indies. He was an Indonesian citizen and, along with his family, known as an influential entrepreneurial family in the country. Passing Michael Bambang Hartono died on March 19, 2026, at the age of 86 in Singapore. The cause of death is not publicly known. As far as is known, no official details regarding memorials or public reactions have been confirmed. Conclusion With the passing of Michael Bambang Hartono, the Indonesian business world loses an influential entrepreneur and billionaire. His legacy lies in transforming a family business into a diversified conglomerate and contributing to Indonesia's financial and industrial development. On Overleden.net, you can find more notable deceased individuals from entrepreneurship. This article was created with the support of AI tools and verified by the Overleden.net editorial team.