Brian O’Kelley says AppNexus fortune was capped below $100 million

Brian O’Kelley AppNexus proceeds were far smaller than the company’s $1.6 billion sale price because the entrepreneur chose to give most of his money away, he told Fortune. O’Kelley said he kept less than $100 million after AT&T acquired the ad-tech company in 2018, setting a personal limit on wealth because he does not believe people need billionaire-level fortunes.

Fortune reported that O’Kelley held a 10% stake in AppNexus when the company was sold. He said he and his wife discussed how much money would be enough for their family, doubled that figure, and donated the remainder to causes they support.

The 49-year-old entrepreneur is now working on Scope3, his third startup, according to Fortune. Scope3 is a company that provides supply-chain emissions data.

Why did Brian O’Kelley give away his AppNexus money?

O’Kelley told Fortune his decision was partly about keeping his family’s life connected to ordinary limits. He said he wanted enough money for a home and a comfortable life, while still having to make financial choices.

He also told Fortune he sees extreme wealth as unnecessary and alienating. O’Kelley said he does not understand why anyone needs $1 billion, $200 billion or $500 billion, and said having to weigh tradeoffs helps keep people accountable.

O’Kelley said that if Scope3 becomes highly successful, he still expects to give away the money rather than join the ranks of billionaires. Fortune quoted him saying he would “never be that wealthy” because any future windfall would also be donated.

How does he view billionaire lifestyles?

O’Kelley criticized public displays of extreme wealth in his interview with Fortune, pointing to yachts, helicopters, private islands and buildings carrying a person’s name. He described that kind of lifestyle as obnoxious and said no person can fully appreciate such excess.

Fortune also cited the broader growth in billionaire wealth, including a reported record 3,302 billionaires worldwide. The story noted that wealthy tech executives and CEOs attended President Donald Trump’s inauguration with combined wealth of more than $1 trillion, and referenced Jeff Bezos’ 2025 wedding to Lauren Sánchez in Venice as an example of lavish spending.

O’Kelley told Fortune that billionaire status can separate people from the consequences and limits that shape normal life. He said he does not want a yacht and does not want to reach a point where money removes accountability.

That view extends to his children, Fortune reported. O’Kelley said his family flies business class in part because he is 6-foot-5, but he worries about his children becoming too accustomed to luxury and wants them to experience some struggle.

O’Kelley said there are moments when he wishes he had more money available for his company, because it could use cash without turning to venture capital investors. He told Fortune that having to ask investors is a form of accountability.

This story draws on original reporting from Fortune.