“Zuck’s Net Worth Pops $8.37B In A Single Day On Muse News, but Little Known Storonsky Actually Made More”
Mark Zuckerberg and a billionaire most Americans have never heard of both gained billions on the same Monday, but only one of those fortunes actually moved that day.
On Monday, two fortunes rose by billions of dollars, and by similar amounts. According to the Bloomberg Billionaires Index, Mark Zuckerberg made $8.37 billion, which brought his total to $263 billion. The same index showed Nikolay Storonsky made $9.30 billion, a 45% jump that the index described as his biggest one-day gain on record. That brought his total to $29.7 billion.
Zuckerberg is one of the best-known executives in the world. Most Americans have never heard of Storonsky. And only one of those two gains came from something that actually happened on Monday.
Zuckerberg’s Gain Came From a Product Launch
Meta Platforms (NASDAQ:META | META Price Prediction) launched two new AI models, Muse Wonder and Muse Wonder Full. SQ Magazine reported both names. CNBC called the launch Meta’s latest test of whether users will pay. The Wall Street Journal reported that Meta called the model its most advanced yet and said it will make the Muse agent smarter. TechCrunch called Muse Wonder Meta’s first frontier model. Quartz and KSL News both described it as a challenge to OpenAI and Anthropic.
Market data, which is separate from the index, shows Meta closed Monday at $742.96, up 3.38% on the day. Meta shipped a product, the market raised its value of the company, and Zuckerberg’s stake rose with it.
Zuckerberg previewed this push on Meta’s July earnings call. He said the Muse models “will also dramatically expand the universe of content that people can discover across our platforms.” Meta’s investor relations site and its SEC filing have the full record.
Storonsky’s Gain Rests on a Valuation Public Since July
Reuters once profiled Storonsky as the Lehman Brothers trader who became a fintech billionaire. He runs Revolut, which is a private company.
The index reportedly last updated on Monday after the market closed, and the jump reportedly reflects Revolut being valued at the $115 billion Reuters and Bloomberg reported. That valuation had already been public for months. On July 22, Reuters reported that Revolut had started a share sale at $115 billion, a figure Bloomberg and CoinDesk also reported. The same day, Bloomberg itself reported that Revolut confirmed the $115 billion figure Reuters and CoinDesk reported in a secondary share sale, which is a sale of existing shares rather than newly issued ones. CoinDesk, citing the Wall Street Journal, and Yahoo Finance reported the same number. Dealroom noted that it was a 53% rise in eight months. By July 24, internationalfinance.com was reporting that Revolut was now worth more than Barclays (NYSE:BCS) and Société Générale.
If this account is right, Monday’s jump reflects the index updating its estimate of what Storonsky was already worth.
Why Billionaire Rankings Mix Two Kinds of Numbers
A public company founder’s wealth is linked to a share price that changes every second the market is open. A private company founder’s wealth is linked to whatever valuation the index picks to use, updated on the index’s own schedule. A funding round or secondary sale often triggers the update. Altrata’s Billionaire Census says private company valuations and venture funding play important roles in building billionaire fortunes.
That means a big one-day jump for a private company founder often reflects a change in how the index values them. For a public company founder, a move of the same size usually reflects a real change in the stock, and rankings show every entry as the same kind of number, so read each one knowing which kind it is.
Revolut’s Valuation Keeps Climbing Toward Bigger Targets
FinTech Weekly reported that Revolut was valued at $75 billion after a secondary share sale in November of last year. In July, Reuters and Bloomberg reported a valuation of $115 billion. On August 4, the Financial Times reported that Storonsky was in talks about a new share award if Revolut reaches a $500 billion valuation. TradingView noted that those talks began before Revolut had reached its reported $200 billion IPO target. All of these are reported figures.
What We Couldn’t Verify
We couldn’t independently verify any net worth figure in this article. Each one is a third-party estimate. We also couldn’t confirm what the index did on Monday or why. The explanation above matches the dates.
Index net worth figures are estimates for everyone on the list, including Zuckerberg. A value based on the stock market is more up to date than a private valuation, yet it remains an estimate. Outsiders can’t fully see things like pledged shares, trusts, debt or charitable commitments, and a stock rising on launch day shows what the market expected from the product. Mashable reported in September that Muse reportedly had a one-click security vulnerability.
November 4 Is the Date to Watch
Meta’s next earnings report is scheduled for November 4, 2026. The company hasn’t confirmed that date yet. That report, more than one day’s stock move, is where investors will start to see whether Muse can make money.
Contact [email protected] for any questions or corrections.
AJ spent 10 years writing about financial markets at The Motley Fool. His coverage centers on technology stocks and the broader macroeconomic trends, from interest rates to geopolitics, that shape where markets are headed next. AJ is drawn to the stories where big-picture economics and individual companies collide.
