Denis O'Brien Net Worth
Source of wealth: Telecom
$3.09B
−$105,683(−0.0%) today
Live · · Forbes real-time
Denis O'Brien's net worth is $3.09 billion as of November 7, 2026, according to Forbes' real-time data, which makes Denis O'Brien the 1349th richest person in the world.
Made since you opened this page
$0.00⏱ 00:00:00 on this page$1.86 per second · based on net worth growth
Spend Denis O'Brien's money →How much does Denis O'Brien make per second, hour and day?
Per second
$1.86
Per minute
$112
Per hour
$6,708
Per day
$161,000
Per week
$1.13M
Per year
$58.81M
Basis: Forbes 2025 World's Billionaires list → Forbes Real-Time Billionaires. How we calculate this
How long it takes Denis O'Brien to earn…
- a Big Mac3.2 seconds
- an iPhone 17 Pro Max17.9 minutes
- the median US salary9.4 hours
- a Tesla Model S Plaid14.2 hours
- an average US home2.6 days
- a Bugatti116.1 days
- a superyacht5.1 years
How did Denis O'Brien get so rich?
Denis O'Brien, whose fortune comes from Telecom, has an estimated net worth of $3.09 billion. That ranks 1349th on Forbes' live list of the world's billionaires. Citizenship: Ireland (based in Dublin).
Since April 2025, when Forbes measured it at $3 billion, Denis O'Brien's fortune has grown by $94.19 million — an average of $1.86 per second, or $161,000 per day.
Denis O'Brien's net worth was $6.8 billion on Forbes' 2015 list, so it is down about 54% since then.
Denis O'Brien net worth history (2015–2026)
| Year | Net worth | Change |
|---|---|---|
| 2026 | $3.1B | +$100M |
| 2025 | $3B | +$200M |
| 2024 | $2.8B | +$100M |
| 2023 | $2.7B | −$1.1B |
| 2022 | $3.8B | −$800M |
| 2021 | $4.6B | +$1.7B |
| 2020 | $2.9B | −$1.1B |
| 2019 | $4B | −$600M |
| 2018 | $4.6B | −$100M |
| 2017 | $4.7B | −$1B |
| 2016 | $5.7B | −$1.1B |
| 2015 | $6.8B | — |
Ranked near Denis O'Brien
| # | Name | Net worth | Today | Per second | Country |
|---|---|---|---|---|---|
| 1346 | Anton OsikaAI coding | $3.1B | — | $71.73/s | Sweden |
| 1346 | Fabian HedinAI coding | $3.1B | — | $71.73/s | Sweden |
| 1348 | Remo RuffiniWinter jackets | $3.1B | −$24.72M(−0.8%) | −$11.89/s | Italy |
| 1349 | Denis O'BrienTelecom | $3.09B | −$105,683(−0.0%) | $1.86/s | Ireland |
| 1350 | Sam AltmanInvestments | $3.09B | +$29.3M(+1.0%) | $31.51/s | United States |
| 1351 | Maja OeriPharmaceuticals | $3.09B | +$4.97M(+0.2%) | −$15.99/s | Switzerland |
| 1352 | Eduardo VivasAdvertising technology | $3.09B | +$246.2M(+8.7%) | $17.62/s | United States |
Compare Denis O'Brien with…
Denis O'Brien net worth: FAQs
What is Denis O'Brien's net worth?
Denis O'Brien's net worth is $3.09 billion as of November 7, 2026, according to Forbes' real-time data, which makes Denis O'Brien the 1349th richest person in the world.
How much does Denis O'Brien make per second?
About $1.86 per second. Since April 2025, when Forbes measured it at $3 billion, Denis O'Brien's fortune has grown by $94.19 million — an average of $1.86 per second, or $161,000 per day.
How much does Denis O'Brien make a day?
Roughly $161,000 per day — that's $6,708 an hour and $112 a minute, based on average net worth growth.
How did Denis O'Brien make their money?
The main sources of Denis O'Brien's wealth are: Telecom. Forbes classifies the fortune as self-made.
How much did Denis O'Brien's net worth change today?
Denis O'Brien's net worth fell by $105,683 compared with the previous trading day, according to Forbes' real-time estimate on November 7, 2026.
How long would it take an average person to earn Denis O'Brien's net worth?
A typical full-time US worker earning about $63,128 a year would need roughly 49,015 years to earn Denis O'Brien's fortune — without spending a cent.
How old is Denis O'Brien?
Denis O'Brien is 68 years old and is a citizen of Ireland.
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.