John Brown vs Jeffrey Koo Jr: who is richer?
John Brown is richer, with a net worth of $7.35 billion versus Jeffrey Koo Jr's $7.29 billion — a gap of $67.11 million, or 1.01 times as much (as of November 7, 2026).
John Brown
Source of wealth: Medical equipment
$7.35B
Jeffrey Koo Jr
Source of wealth: Finance
$7.29B
Made since you opened this page: $0.00
Side-by-side
| John Brown | Jeffrey Koo Jr | |
|---|---|---|
| Net worth | $7.35B | $7.29B |
| World rank | #550 | #553 |
| Makes per second | −$16.73 | $55.14 |
| Makes per day | −$1.45M | $4.76M |
| Today | −$185.1M | −$111.2M |
| Source of wealth | Medical equipment | Finance |
| Age | 92 | 62 |
| Country | United States | Taiwan |
Net worth by year
| Year | John Brown | Jeffrey Koo Jr |
|---|---|---|
| 2026 | $8.5B | $6.2B |
| 2025 | $8.2B | $4.5B |
| 2024 | $7.7B | $1.7B |
| 2023 | $5.7B | — |
| 2022 | $5.4B | — |
| 2021 | $5.2B | — |
| 2020 | $3B | — |
| 2019 | $3.9B | — |
| 2018 | $3.3B | — |
| 2017 | $2.7B | — |
| 2016 | $2.1B | — |
| 2015 | $2.1B | — |
Frequently asked questions
Who is richer, John Brown or Jeffrey Koo Jr?
John Brown is richer, worth $7.35 billion compared with Jeffrey Koo Jr's $7.29 billion. The difference is $67.11 million.
Who makes more per second, John Brown or Jeffrey Koo Jr?
Jeffrey Koo Jr makes more: about $55.14 per second versus −$16.73. Per day that's $4.76M vs −$1.45M.
How many times richer is John Brown than Jeffrey Koo Jr?
John Brown has about 1.01 times Jeffrey Koo Jr's net worth.