William MacMillan Net Worth
Source of wealth: Cargill
$1.51B
— today
Live · · Forbes real-time
William MacMillan's net worth is $1.51 billion as of November 7, 2026, according to Forbes' real-time data, which makes William MacMillan the 2590th richest person in the world.
Made since you opened this page
$0.00⏱ 00:00:00 on this page$2.28 per second · based on net worth growth
Spend William MacMillan's money →How much does William MacMillan make per second, hour and day?
Per second
$2.28
Per minute
$137
Per hour
$8,190
Per day
$196,566
Per week
$1.38M
Per year
$71.8M
Basis: Forbes 2025 World's Billionaires list → Forbes Real-Time Billionaires. How we calculate this
How long it takes William MacMillan to earn…
- a Big Mac2.6 seconds
- an iPhone 17 Pro Max14.6 minutes
- the median US salary7.7 hours
- a Tesla Model S Plaid11.6 hours
- an average US home2.1 days
- a Bugatti95.1 days
- a superyacht4.2 years
How did William MacMillan get so rich?
William MacMillan, whose fortune comes from Cargill, has an estimated net worth of $1.51 billion. That ranks 2590th on Forbes' live list of the world's billionaires. Citizenship: United States (based in Englewood, Colorado).
Since April 2025, when Forbes measured it at $1.4 billion, William MacMillan's fortune has grown by $115 million — an average of $2.28 per second, or $196,566 per day.
William MacMillan's net worth was $1 billion on Forbes' 2015 list, so it has grown about 1.5x since then.
William MacMillan net worth history (2015–2026)
| Year | Net worth | Change |
|---|---|---|
| 2026 | $1.7B | +$300M |
| 2025 | $1.4B | +$100M |
| 2024 | $1.3B | +$100M |
| 2023 | $1.2B | −$400M |
| 2022 | $1.6B | +$500M |
| 2021 | $1.1B | −$200M |
| 2019 | $1.3B | $0 |
| 2018 | $1.3B | +$100M |
| 2017 | $1.2B | +$200M |
| 2016 | $1B | $0 |
| 2015 | $1B | — |
Ranked near William MacMillan
| # | Name | Net worth | Today | Per second | Country |
|---|---|---|---|---|---|
| 2590 | Cargill MacMillan IIICargill | $1.51B | — | $2.28/s | United States |
| 2590 | John MacMillanCargill | $1.51B | — | $2.28/s | United States |
| 2590 | Martha MacMillanCargill | $1.51B | — | $2.28/s | United States |
| 2590 | William MacMillanCargill | $1.51B | — | $2.28/s | United States |
| 2594 | Ronald PerelmanLeveraged buyouts | $1.51B | +$2.08M(+0.1%) | −$1.72/s | United States |
| 2595 | Julia OetkerConsumer goods | $1.51B | — | $0.26/s | Germany |
| 2596 | Vladimir Fartushnyakretail | $1.51B | — | −$7.71/s | Russia |
Compare William MacMillan with…
William MacMillan net worth: FAQs
What is William MacMillan's net worth?
William MacMillan's net worth is $1.51 billion as of November 7, 2026, according to Forbes' real-time data, which makes William MacMillan the 2590th richest person in the world.
How much does William MacMillan make per second?
About $2.28 per second. Since April 2025, when Forbes measured it at $1.4 billion, William MacMillan's fortune has grown by $115 million — an average of $2.28 per second, or $196,566 per day.
How much does William MacMillan make a day?
Roughly $196,566 per day — that's $8,190 an hour and $137 a minute, based on average net worth growth.
How did William MacMillan make their money?
The main sources of William MacMillan's wealth are: Cargill.
How long would it take an average person to earn William MacMillan's net worth?
A typical full-time US worker earning about $63,128 a year would need roughly 23,999 years to earn William MacMillan's fortune — without spending a cent.
How old is William MacMillan?
William MacMillan is 72 years old and is a citizen of United States.
Sources
- Net worth: Forbes Real-Time Billionaires (source), refreshed every 15 minutes.
- History: Forbes World's Billionaires lists, 2015–2026.
- Per-second figures are averages. See our methodology.