Yves Guillemot's net worth is estimated in the range of roughly €200 million to €500 million as of early 2026, though the exact figure varies significantly depending on when you check it and which source is doing the calculating. The reason for that wide range is straightforward: almost all of his wealth is tied to Ubisoft shares, and Ubisoft's stock has been through a brutal stretch. If you want a single working number, think somewhere around €200 to €300 million at current market prices, but read on because understanding how that figure moves is just as useful as the headline itself.
Yves Guillemot Net Worth 2026: Estimate, Shares, and How to Verify
Laurent Devereaux
20 Apr 2026
Who Yves Guillemot Is
Yves Guillemot co-founded Ubisoft in March 1986 alongside four of his brothers in Brittany, France. What started as a mail-order software distributor grew into one of the world's largest video game publishers, home to franchises like Assassin's Creed, Far Cry, and Rainbow Six. He has served as Chairman of the Board and Chief Executive Officer ever since, chairing the company's General Shareholders' Meetings as recently as July 2025. In a French business context, that kind of founder-led, family-anchored company structure is more common than in the Anglo-Saxon tech world, and it is precisely that long-term family ownership stake that makes his net worth so directly tied to a single stock.
The broader Guillemot family also operates Guillemot Corporation and Guillemot Brothers Limited, separate entities that hold Ubisoft shares in concert. So when you see references to the 'Guillemot family stake' in filings, that includes not just Yves personally but a coordinated group of related entities. Yves is the public face and the CEO, but the wealth is genuinely a family construct.
What Net Worth Actually Means for Someone Like This
Net worth, at its simplest, is total assets minus total liabilities. For a billionaire or near-billionaire whose fortune is built on a major equity stake in a public company, the calculation is dominated by one input: the market value of the shares they hold. You take the number of shares owned, multiply by the current share price, add any other known assets (real estate, other investments, cash), and subtract any known debts. That gives you an estimate.
The problem is that third-party estimators like Forbes, Bloomberg Billionaires Index, and Wealth-X each use slightly different methodologies, different valuation dates, and different assumptions about what else a person might own privately. Forbes pegs its annual billionaires list to a specific date (March 1, 2026 for the 2026 edition), which means the number is already a snapshot frozen in time. Bloomberg updates more frequently. Wealth-X focuses on ultra-high-net-worth identification rather than real-time tracking. None of them have access to private bank accounts or undisclosed holdings. So treat any published figure as an informed estimate with a real margin of error, not a certified audit.
The Current Estimate and Why It Varies So Much
As of a major shareholding notification filed around March 23, 2026, the 'concert familial Guillemot' held 16,652,849 Ubisoft shares, representing 12.36% of Ubisoft's capital and 18.87% of voting rights. That is the most precise public data point available. To convert that into a net worth figure, you multiply those shares by Ubisoft's current share price.
The challenge is that Ubisoft's share price has been extremely volatile. In early 2026, reports emerged that Ubisoft's market capitalization fell below €1 billion amid restructuring announcements and game cancellations. At a €1 billion market cap, a 12.36% stake would be worth roughly €124 million. At a higher market cap of, say, €2 to €3 billion (which was more typical in earlier periods), the same stake would be worth €250 to €370 million. That range explains why different sources publishing at different times will give you very different numbers. Yves Guillemot himself has not seen his personal fortune hold steady; it has moved sharply with the stock.
It is worth noting that an earlier filing from August 2025 showed the family concert held 19,677,323 shares (14.84% of capital). The drop to 16.6 million shares by March 2026 is partly explained by a settlement of prepaid futures contracts by Guillemot Brothers Limited announced on March 27, 2026. This kind of technical transaction can reduce reported share counts without necessarily reflecting a direct sale of personal holdings, but it does affect the equity-value calculation that feeds into net worth estimates.
How Yves Guillemot Makes and Retains Wealth
The primary mechanism is straightforward: he holds a significant equity stake in Ubisoft, and when the company's market valuation rises, his net worth rises with it. When the stock falls, so does his paper wealth. This is classic founder-equity wealth, similar to what you see with other French business dynasties, though on a different scale from, say, the Arnault family at LVMH or the Pinaults at Kering.
Beyond capital appreciation, there are a few other income channels worth understanding. Ubisoft has historically paid dividends, though these have been modest and inconsistent during periods of financial strain. Yves also draws a salary and compensation package as CEO, which Ubisoft discloses annually in its Universal Registration Document. The company has share buyback programs, which were discussed at the July 2025 AGM, and these can affect per-share valuations indirectly. His compensation as an executive is a small fraction of his total wealth picture compared to the equity stake, but it is publicly documented and worth checking if you want the full picture.
Ubisoft's Situation and Why It Matters for the Number
Ubisoft has had a difficult run heading into 2025 and 2026. The company issued a disappointing fiscal 2025-26 outlook that sent shares down roughly 20% in a single session at one point. The company has gone through restructuring, cancelled games, and faced pressure on its net bookings. Yves Guillemot was quoted in Le Monde in February 2026 discussing the company's uncertain future even as quarterly results were described as steady.
The ownership structure adds another layer of context. The Guillemot family and Tencent operate in a formal concert (a coordinated shareholder group under French securities law). As of the 2024 annual report, Tencent held about 9.2% of Ubisoft's net voting rights versus the Guillemot family's roughly 20.5% at that time. Tencent's stake is capped at 9.99% of capital and voting rights under the terms of their agreement. In 2024, there were reports that both Tencent and the Guillemot family were exploring a possible buyout of Ubisoft, which briefly sent shares surging. That episode illustrates exactly how corporate events, not just daily trading, can create sudden swings in equity-based net worth.
Ubisoft also exited the Euronext 150 Index, which put its valuation further in focus among analysts. These structural market events matter because index inclusion affects institutional buying pressure and, by extension, share price, which feeds directly back into how much Yves Guillemot's stake is worth on any given day.
Assets and Lifestyle Context
Beyond his Ubisoft shares, Guillemot's personal asset base is not publicly detailed in the way that, say, a luxury-goods mogul's real estate holdings might be. He has operated primarily as a company builder rather than a visible consumer of conspicuous wealth. The Guillemot family's wealth is tied up in operating entities, Guillemot Corporation (which makes gaming peripherals under brands like Thrustmaster and Hercules) and the holding structures around Ubisoft, rather than in publicly disclosed personal real estate portfolios or art collections.
This is a contrast to some of the other French fortunes profiled in the same wealth universe. Unlike figures connected to luxury fashion or the Arnault and Pinault family empires, Guillemot's fortune is concentrated in a single tech/entertainment company in a sector prone to sharp re-ratings. That concentration is both what made his wealth grow quickly during Ubisoft's peak years and what has made it compress sharply as the company struggles.
How to Verify and Track the Number Yourself
If you want to check or update this estimate yourself, here is the practical approach to take:
- Start with Ubisoft's major shareholding notifications. These are filed with the AMF (Autorité des marchés financiers) and reproduced on financial-disclosure platforms like FinancialReports.eu. They give you the precise share count held by the Guillemot family concert as of a specific date. The March 23, 2026 notification showing 16,652,849 shares is the most recent available as of April 2026.
- Check Ubisoft's monthly 'total voting rights and shares' releases. Ubisoft publishes these monthly through Webdisclosure (webdisclosure.com), and they update the total share count, which affects what percentage a given holding represents.
- Pull Ubisoft's current share price from any major market data provider (Euronext Paris, Yahoo Finance, Google Finance). Multiply the shares held (from step 1) by the current price to get the equity value in euros.
- Read the Universal Registration Document (URD). Ubisoft's most recent URD is publicly available as a PDF from its investor relations page. This document contains the full breakdown of major shareholders, Yves Guillemot's compensation, governance roles, and related-party transactions between the company and Guillemot family entities.
- Cross-check with Forbes and Bloomberg. Forbes locks its billionaires estimate to March 1 of each year, so the 2026 number is a March 2026 snapshot. Bloomberg's Billionaires Index updates more frequently. Neither will be perfectly current, but together they give you a sense of the credible range.
- Watch for corporate event filings. Buyout speculation, restructuring announcements, index changes, and futures-contract settlements all trigger stock moves that can shift the net worth estimate by tens of millions of euros in a day. Set a Google Alert for 'Ubisoft major shareholding' to catch new AMF filings as they are published.
| Source | What It Gives You | Update Frequency | Best For |
|---|---|---|---|
| AMF / FinancialReports.eu | Exact family concert share count | Per threshold crossing | Calculating equity value |
| Ubisoft Webdisclosure | Total shares and voting rights outstanding | Monthly | Updating ownership percentages |
| Ubisoft URD (Investor Relations) | Compensation, governance, major shareholders | Annual | Full ownership and pay context |
| Forbes Billionaires List | Annual net worth estimate | Annual (March snapshot) | High-level benchmark |
| Bloomberg Billionaires Index | Frequently updated estimate | Near real-time | Tracking recent moves |
| Euronext Paris / Yahoo Finance | Current Ubisoft share price | Real-time | Price input for your own calculation |
The honest takeaway is that <a data-article-id="01E61CFD-BD6D-4A0A-81EB-FCAF70B1946B">Yves Guillemot's net worth</a> is a moving target right now, more than most comparable French business figures, because it is so tightly linked to a company going through a difficult transformation. If you are specifically trying to understand Yves Béhar net worth, the same idea applies: equity values and market timing drive most of the estimate Yves Guillemot's net worth. If you are looking for a similar breakdown, compare it with other profiles such as kino yves net worth. If you are comparing how different fortunes are valued, see how estimates for Yves Saint Laurent's net worth are calculated and why they can vary too yves saint laurent net worth. The best approach is not to anchor to one number but to understand the inputs, check the filings, and recalculate when something material changes. If you are also comparing billionaire-style figures, you can use the yves-andre istel net worth discussion as a related benchmark for how volatile equity-linked fortunes get valued. That gives you a far more reliable picture than any single headline figure.
If you are researching other French figures named Yves for comparison, the wealth profiles of those in luxury fashion or design tend to have more diversified and stable asset bases, which makes their net worth estimates less volatile than Guillemot's equity-driven fortune. His story is distinctly the story of a single company, built from scratch in Brittany, that became a global giant and is now navigating one of the most uncertain chapters in its history.
FAQ
How can I verify an updated yves guillemot net worth estimate without relying on headline net worth sites?
Start with the most recent public change in the Guillemot family concert share count, then multiply the latest reported shares by Ubisoft’s current share price. If you want a sanity check, also compare the implied value to Ubisoft market cap times the family’s percentage of voting rights, since voting-right calculations often match concert filings more closely than capital percentages.
Why do net worth estimates change even if the number of Ubisoft shares is the same?
Because the valuation input moves daily. In practice, net worth figures based on equity stakes will swing with Ubisoft’s share price, plus occasional corporate events that change share structure (for example, buybacks, issuance, or conversion terms), even if your referenced shareholder count looks unchanged.
What’s the difference between using percentage of capital versus percentage of voting rights for calculations?
They can diverge when share classes differ or when certain agreements weight voting power. If a source gives capital and voting percentages, you may get different implied values depending on which percentage you apply to market cap. For consistency, use the percentage that matches the filing’s basis, typically voting rights for concert-controlled calculations.
If the family reduced its reported share count due to prepaid futures settlement, does that mean Yves sold shares?
Not necessarily. The article explains that technical transactions like settling prepaid futures can reduce the reported share count without a straightforward “sale for cash” story. To understand the real economic impact, look for accompanying disclosures that indicate whether the settlement resulted in delivered shares, cash netting, or exposure transfer.
Do Ubisoft dividends meaningfully affect yves guillemot net worth?
Usually only marginally in this case. When a fortune is dominated by a large equity stake, dividend payments are typically smaller and inconsistent during downturns, so the share-price move tends to outweigh dividend yield in the short to medium term.
Should I include Yves’s salary and CEO compensation in a net worth estimate?
You can include it as “known annual income,” but it generally will not materially change a headline net worth number for an equity-concentrated fortune. A better approach is to treat compensation as a minor incremental component unless there is a clearly disclosed large non-equity payout or a one-time transaction.
How do stock buybacks change the net worth calculation for Yves’s stake?
Buybacks can alter per-share metrics by reducing share count, which can indirectly affect the share price and therefore the market value of the remaining shares. Your best quick method is to recalculate using actual share count from the latest filing, then multiply by the post-buyback market price, rather than trying to adjust the old valuation manually.
What’s the quickest way to estimate the net worth range on a given day?
Use a two-point range based on market cap scenarios or share price thresholds, then compute: (shares held) × (low share price) to (high share price). This mirrors the article’s explanation that a single stake can look like two very different fortunes depending on valuation timing.
Why might different estimators disagree by hundreds of millions for the same person?
They may use different valuation dates, different share-count sources, and different treatment of private holdings, debt, or tax assumptions. Even small differences in what they assume Yves owns beyond the Ubisoft stake can create large gaps when their base is already a concentrated equity position.
How often should I update my own yves guillemot net worth estimate during volatile periods?
During major restructurings or after big corporate news, consider updating after each significant share-price move or after new shareholder-transaction filings. If you are doing monthly tracking, anchor to fixed dates for comparability, similar to how some lists use a snapshot date.
Does Yves’s net worth reflect only what he personally owns, or also family and holding structures?
Most public “net worth” writeups for founder-linked European businesses reflect the economic benefit of the controlled shareholder group, not just a single individual’s direct holdings. The article notes the wealth is a family construct, so you should treat calculations as “stake-controlled” rather than strictly “one person’s brokerage account.”
If a buyout rumor spikes Ubisoft shares, will yves guillemot net worth estimates automatically stay elevated later?
Often they drop quickly when the market re-prices the probability of the deal, especially after clarifications or failure to proceed. For equity-linked fortunes, the estimate is as much about deal likelihood and discount rates as it is about the theoretical offer price.