Michael Hartono Net Worth: $17.5B at His Death per Forbes, and Two Different Figures for What His Heirs Received
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Michael Hartono's net worth was $17.5 billion per Forbes on 19 March 2026, the day he died in Singapore at 86, according to Indonesian outlet CNN Indonesia. Forbes had put him at $25.1 billion in December 2024, so its own figure for him fell by about $7.6 billion, roughly 30%, across those 15 months. Then, in August 2026, two publishers priced what his four children received from his estate at two different numbers.
Michael Bambang Hartono, who co-founded the Djarum Group with his younger brother Robert Budi Hartono, died on 19 March 2026 at a hospital in Singapore, per a Djarum Group statement reported by the Associated Press and Antara. He was born in Kudus, Central Java, on 2 October 1939.
Forbes is the only tracker this run found pricing Michael Hartono on his own, rather than jointly with his brother. Both figures below are Forbes, so the comparison stays inside one series.
| Publisher | Date | Figure | Note |
|---|---|---|---|
| Forbes | December 2024 | $25.1 billion | 76th in the world |
| Forbes | December 2025 | $43.8 billion | joint figure for both brothers, Indonesia's 50 Richest |
| Forbes | 19 March 2026 | $17.5 billion | roughly 157th to 158th, depending on the outlet (via CNN Indonesia) |
The December 2025 line is not a "before" for the March 2026 line. It priced two people together. The two individual Forbes figures are the only like-for-like pair, and even they come from different Forbes products, an annual list and a real-time tracker.
Most of it runs through PT Dwimuria Investama Andalan (DIA), the private holding company that owns 54.942% of Bank Central Asia (ticker BBCA), per BCA's own disclosure. The remainder is in Djarum, the kretek cigarette maker, plus interests in property, plantations and technology.
Per Bloomberg on 12 August 2026, citing a government filing, Michael's 49% stake in DIA was split equally among his four children. Bloomberg valued that stake at at least $11.7 billion as of 11 August, using DIA's BCA holding alone, which works out to at least $2.93 billion each.
AsiaOne and Tempo's English edition, reporting the same succession in August 2026, gave a different figure: $3.75 billion per heir, or $15 billion across the four. Bloomberg's number is a floor built from the BCA stake alone, and the reports did not explain how the higher one was reached, so this article does not choose between them.
No publisher this run found ties Forbes' fall since 2024 to any single cause. DIA's value moves with BBCA's share price, but that is a structural fact about the holding, not a finding about this figure.
Less than a bank stock suggests. BBCA trades daily, but DIA is private, and Djarum has no listed price at all. Compare Sukanto Tanoto, whose fortune is almost entirely private, or Françoise Bettencourt Meyers, whose inherited wealth sits behind a family holding over one public stock, the same shape as DIA. After a death, a further layer appears: the figure a tracker publishes for the person stops, and the figures for the heirs begin, each on their own method.
A wealth figure for someone who has died is a last reading, not a live one. Forbes' $17.5 billion is dated 19 March 2026. The August heir figures are a separate set of estimates of a separate event, and they should not be added to or subtracted from it.
When two credible outlets price the same transfer differently, the gap is the story. Check whether each number counts one listed stake or the whole family estate. Nothing in the public record found here suggests anything beyond an orderly succession recorded in a government filing. For the daily pricing behind a listed holding like BBCA, NetWort's asset pages and market page show it directly.