Dewi Kam Net Worth: Indonesia's Richest Woman for Years, Until Forbes Moved the Title
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Dewi Kam's net worth was $3.6 billion, per Forbes' 2026 World's Billionaires List (10 March 2026, priced against 1 March 2026 markets), ranking her #1189 globally and 10th among Indonesian billionaires. That figure is lower than the $4.45 billion Forbes gave her in 2023 and the $4.8 billion she shared with Marina Budiman on Forbes' 2025 list of the world's 50 richest self-made women. For most of the 2020s, Dewi Kam held the title "Indonesia's richest woman." Forbes moved that title to Marina Budiman on 22 April 2026.
| Publisher | Date | Figure | Note |
|---|---|---|---|
| Forbes, via Databoks/Kompas | 2022 | ~$2.0 billion (Rp31.33 trillion) | Named Indonesia's richest woman |
| Forbes, via Databoks/Kompas/Bisnis.com | 2023 | $4.45 billion (Rp68.98 trillion) | Named Indonesia's richest woman again |
| Forbes, "World's 50 Richest Self-Made Women" | 28 September 2025 (IDN Financials, 29 Sept 2025) | $4.8 billion | Tied #16 globally with Marina Budiman |
| Forbes, 2026 World's Billionaires List | 10 March 2026 | $3.6 billion | #1189 world, #10 Indonesia |
Unlike most fortunes this series has covered, Dewi Kam's headline number has gone down across Forbes' own reporting, not up. Every figure above is Forbes, so this is a legitimate single-tracker before-and-after, not a comparison across trackers with different methodologies.
A minority stake in coal, plus private power plants.
Dewi Kam holds roughly 10% of PT Bayan Resources Tbk (ticker BYAN) through PT Sumber Suryadaya Prima, a holding vehicle she owns 99.56% of, per a disclosure on Minerba One Data Indonesia (MODI), the Ministry of Energy and Mineral Resources' public platform, as of 30 September 2025.
Beyond BYAN, Dewi Kam controls a chain of private power-generation vehicles, none of them listed. PT Sumbergas Sakti Prima, roughly 99.5% hers, holds 91% of PT Sumber Energi Sakti Prima, which in turn holds 51% of PT Sumber Segara Primadaya, the developer of the coal-fired power plant in Karangkandri, Cilacap, Central Java (the remaining 49% belongs to state utility subsidiary PT Pembangkit Jawa-Bali, per company profile disclosures reported by Kompas). PT Sumber Energi Sakti Prima also partners with PT Bosowa Energi on a second coal-fired plant in Jeneponto, South Sulawesi.
None of these power-plant vehicles carry a public listing or a quarterly disclosure obligation. That distinguishes this fortune from her BYAN stake, which is priced daily on the IDX, and puts it closer in shape to Chairul Tanjung's wholly private CT Corp holdings than to a single-stock fortune like Low Tuck Kwong's.
Less than the headline "richest woman" swap suggests.
BYAN itself was comparatively steady through the first half of 2026: Rp12,300 per share on 21 April 2026 (Asatunews, citing IDX data) and Rp11,975 on 25 July 2026 (StockAnalysis.com), a small move either way. Bayan Resources' own Q2 2026 results showed net income up 67% year on year to $219.5 million on revenue up 26% to $918.5 million, an improving business that did not translate into a dramatically higher share price in the same stretch.
That is the real story behind the "richest woman" handoff. It was not that anything happened to Dewi Kam's stake. It is that Marina Budiman's DCI Indonesia stock moved far more, which NetWort's Marina Budiman profile covers in full. Forbes' own figures for Dewi Kam simply did not keep pace, and by its 2026 annual list she was worth less than she had been in 2023.
Less than the precision implies, and for an unusual reason here: Bloomberg does not appear to track Dewi Kam individually. Every figure in this article is Forbes, across three different Forbes products (the annual Indonesia rich list, the self-made women list, and the annual World's Billionaires List) spanning four years. That still leaves real disagreement. The $2.0 billion (2022), $4.45-4.8 billion (2023-2025) and $3.6 billion (2026) figures cannot all be describing a smooth trend, since BYAN's share price has not moved anywhere near that violently. Some of the spread is almost certainly methodology, not just the market: how Forbes values the unlisted power-plant vehicles alongside the listed BYAN stake is not disclosed in any of the reporting found for this article.
Three things, none of which require a coal industry view.
"Richest woman" is a snapshot, not a permanent title. Dewi Kam held it through 2022 and 2023 on Forbes' own reporting. By April 2026, Forbes had moved it to someone else, not because her fortune collapsed, but because another one grew faster. Titles like this describe a moment, not a person.
A minority stake and a controlling stake in the same company are different assets. Low Tuck Kwong's 40%-plus and Dewi Kam's 10% both sit in Bayan Resources, and conflating the two, as some casual coverage does, misreads what each person actually owns.
Mixing a listed stake with private holdings widens the honest range around a number. NetWort's asset pages show a live, sourced price for Bayan Resources (BYAN) itself. What a private holding company alongside it is worth is a separate, much less certain question, and that gap is worth remembering any time a headline net worth figure blends the two.