The best available estimate for Yves-André Istel's net worth sits somewhere in the range of $5 million or more, anchored almost entirely by his publicly documented holdings in Analog Devices (ADI) stock. GuruFocus puts the figure at over $5 million based on roughly 14,225 ADI shares reported in SEC filings. A separate tracker, CoreStreet, pegs a much lower floor of around $123,000, derived purely from recent SEC Form 4 transaction data and conservative holding assumptions. Neither figure captures the full picture, but the GuruFocus estimate is the more credible headline number given the share count it references.
Yves-André Istel Net Worth Estimate: How It’s Built and Verified
Laurent Devereaux
22 Jun 2026
Who Yves-André Istel is
Yves-André Istel is a French-American financier who built a career at the intersection of investment banking and luxury conglomerate governance. He is best known in wealth-tracking circles for two board roles: a long tenure on the board of Compagnie Financière Richemont SA, the Swiss luxury giant behind Cartier, Van Cleef and Arpels, and IWC, and a directorship at Analog Devices (ADI), the U.S. semiconductor company.
At Richemont, he joined the board in 1990, became Deputy Chairman in 2010, and served as Chairman from September 2013 to September 2014, after which he continued in an individual advisory capacity. At Analog Devices, he served as a director until he notified the board on December 16, 2015, that he would not stand for re-election at the next annual meeting. More recently, SEC filings connect him to Alvarium Tiedemann Capital LLC, where he appears as a Managing Director in governance documents. He also runs a small private foundation, the Y A Istel Foundation Inc, which had net assets of just $108,084 as of fiscal year 2022.
He sits in a different wealth category from the headline French billionaires this site typically profiles, like the Arnault or Pinault families. But he is a genuine figure in French and European luxury finance, and his Richemont connection makes him relevant to anyone tracing how major luxury conglomerates are governed and who benefits financially from sitting at the top of those structures. For a quick summary of how his wealth is calculated and what analysts cite, see the discussion of Yves-François Blanchet net worth.
How analysts estimate his net worth
There is no public wealth disclosure for Istel the way there is for a billionaire with a listed company stake. If you are comparing how these wealth estimates work in practice, see also yves béhar net worth for another example of how public filings and assumptions drive the final figure. Instead, every estimate you will find online is built from one primary source: SEC Form 4 filings, which directors of U.S.-listed companies must submit when they acquire or sell shares. Those filings report beneficial ownership, transaction dates, share counts, and cost basis.
GuruFocus aggregates these filings and multiplies the reported share count (roughly 14,225 ADI shares) by the current market price of Analog Devices stock to arrive at their $5 million-plus estimate. CoreStreet uses a similar methodology but applies more conservative assumptions about which holdings are still active, landing on a much lower $123,461 floor. The difference between those two numbers tells you how sensitive these estimates are to assumptions about whether reported historical shares are still held today.
Neither source has visibility into private investments, real estate, cash, retirement accounts, or any compensation he may have received from Richemont or Alvarium Tiedemann. Those are significant blind spots. His Richemont role alone, spanning more than two decades including a stint as Chairman, would have involved director fees and potentially equity-linked compensation, none of which appears in U.S. public filings.
What actually drives his wealth
Analog Devices stock holdings
The most directly documented asset is his ADI shareholding. Analog Devices trades on Nasdaq under the ticker ADI. As of the GuruFocus data (updated April 2026), approximately 14,225 shares are attributed to him. At ADI's price range in 2025 and 2026 (generally between $180 and $250 per share), that block of stock would be worth roughly $2.5 million to $3.5 million at the lower share-count interpretation, or over $5 million if additional options or unreported holdings are factored in.
Richemont board compensation
Richemont is a Swiss-listed company and its board compensation disclosures are published in annual reports, but only in aggregate or with Swiss disclosure norms that do not always break out individual directors. Istel's roles as Deputy Chairman and then Chairman of the Audit Committee from 2010 onward would have come with significant director fees. Richemont’s own disclosure describes Yves-André Istel as Deputy Chairman of the Board and as [Chairman of the Audit Committee of Compagnie Financière Richemont SA](https://www. richemont.
com/news-media/press-releases-news/additional-member-of-the-richemont-audit-committee/) (as of 2010). In 2013 to 2014, his brief tenure as Chairman would have placed him at the very top of the board compensation structure. These earnings are unquantified in public data but are a material part of any realistic net worth estimate.
Alvarium Tiedemann role
SEC filings related to Alvarium Tiedemann Capital LLC include Istel's signature as Managing Director. Alvarium Tiedemann is a wealth and asset management firm with significant assets under management. A Managing Director role at such a firm typically involves either a compensation arrangement, a carried interest or profit-sharing structure, or both. No specific financial terms are disclosed in the public filings, so this remains an unquantified but plausible contributor to his wealth.
The Y A Istel Foundation
His private foundation (Y A Istel Foundation Inc) is a small philanthropic vehicle, not a wealth-building structure. IRS Form 990-PF data from ProPublica shows it had revenue of $93,460 and net assets of $108,084 for the fiscal year ending April 2022, with expenses of $135,163 producing a net loss of roughly $41,700. This is a modest foundation by any measure and does not materially affect his net worth estimate.
What can move the number up or down
His documented ADI holdings are directly tied to Analog Devices' stock price, which can swing 20 to 30 percent in a given year depending on semiconductor sector conditions. If the 14,225-share figure is accurate and ADI trades at $220, that position alone is worth about $3.1 million. At $260, it is closer to $3.7 million. Any shares sold since his last Form 4 filing would reduce the position without triggering an updated disclosure unless the transaction itself requires one.
The bigger unknown is Richemont. As a long-serving board member of one of the world's largest luxury groups, any equity awards, fee structures, or deferred compensation arrangements tied to Richemont's performance would track the company's share price and Swiss franc exchange rate. Richemont has had significant valuation swings over the past decade, and its stock roughly doubled between 2020 and 2022 before correcting. Someone who accumulated equity or cash fees across a 30-year board tenure could have accumulated a meaningful private portfolio from that alone.
Changes in his role at Alvarium Tiedemann, any new board appointments, or changes in private investment valuations could also shift the estimate without appearing in any public filing until a disclosure event triggers them.
How to verify the number yourself today
If you want to cross-check or update these estimates, here is exactly where to look and what to search.
- Go to the SEC EDGAR full-text search at efts.sec.gov and search for 'Yves Andre Istel' or 'ISTEL YVES ANDRE'. Filter by Form Type 4 to see all insider transaction filings for Analog Devices. Note the most recent filing date, the share count, and any transactions reported.
- On the SEC EDGAR company search, look up 'Analog Devices Inc' and pull the most recent proxy statement (DEF 14A). These filings include beneficial ownership tables that list each director's share count as of the record date.
- Check GuruFocus (gurufocus.com) and search 'Yves Andre Istel'. Their insider page aggregates Form 4 filings and calculates a current estimated value based on live ADI price. This is the fastest way to get an updated number.
- Search CoreStreet or similar SEC-aggregator sites for the same name to get a second data point. Compare the share counts, not just the dollar figures, since the gap between estimates usually comes from different assumptions about current holdings rather than different share prices.
- For Richemont context, download the most recent Richemont Annual Report PDF from richemont.com and search for 'Istel' in the board of directors section. This will confirm his current role (or absence) and any disclosed compensation structure.
- For the Alvarium Tiedemann connection, search SEC EDGAR for 'Alvarium Tiedemann' and filter for SC 13D or 13G filings. Look for any exhibit pages or signature blocks that name Istel and confirm whether his role is still active.
- Finally, check ProPublica's Nonprofit Explorer (projects.propublica.org/nonprofits) and search 'Y A Istel Foundation' to pull the most recent 990-PF, which will show whether the foundation's assets have grown or shrunk since the 2022 filing.
Putting the estimate in context
Istel's wealth profile is very different from the other prominent figures named Yves in French business. Yves Saint Laurent's estate and brand value reached billions, and Yves Guillemot's stake in Ubisoft has historically been worth hundreds of millions. If you are comparing him to more widely covered luxury heirs, you may also want to look up Yves Saint Laurent net worth and how it was driven by the brand estate. Istel is a financier and board-level operator, not a founder or controlling shareholder, which means his wealth is primarily compensation-driven and investment-based rather than tied to a single concentrated equity position.
The honest summary is this: the publicly verifiable floor of his net worth is in the low millions based on documented ADI shares. If you are specifically looking for Yves-André Istel’s net worth, start with the SEC-based estimates and then compare how Richemont and Alvarium Tiedemann could change the total. The realistic estimate, once you factor in decades of director fees from Richemont, likely private investments, and his Alvarium Tiedemann role, is almost certainly higher, but by how much is genuinely unknown. If you need a single number to work with, the GuruFocus estimate of $5 million-plus is the most defensible public figure available as of mid-2026.
FAQ
What actually updates Yves-André Istel net worth figures, and how often should I expect changes?
For this type of estimate, the most common update trigger is a new SEC Form 4 transaction for his Analog Devices (ADI) shares. If his ADI position changes (buy, sell, or option exercises), you will see new share counts and dates, which can move the estimate quickly because ADI’s price swings can be large.
Why can “ADI shares times price” differ from Yves-André Istel’s real net worth?
Don’t treat the “share count times stock price” result as his true net worth unless you also model taxes, transaction timing, and any debt or encumbrances. An estimate based on beneficial ownership is closer to an equity position value, it is not automatically his spendable net worth.
How can two trackers both use SEC filings and still produce very different net worth numbers?
If his latest Form 4 shows beneficial ownership that includes options or indirect holdings, some sites may count them as if they are currently held at full share value, which inflates totals. The CoreStreet-style conservative floor is often lower because it effectively discounts uncertainty about whether older reported shares are still active holdings.
If there has been no recent SEC filing, how should I “refresh” the estimate responsibly?
If no new Form 4 appears, estimates often become stale because they assume the same shares are still owned. One practical step is to cross-check his ownership history and look for the most recent filing date, then apply today’s ADI price to that last disclosed share count.
Why is Richemont compensation a major blind spot for Yves-André Istel net worth estimates?
Richemont board compensation is frequently harder to individualize because disclosures are sometimes aggregated or follow Swiss reporting norms. Even if fees are substantial, you may not be able to convert them into a reliable lifetime personal value without knowing what portion was taken as cash versus deferred or reinvested.
What should I assume, and not assume, about his Alvarium Tiedemann Managing Director role?
Role changes at Alvarium Tiedemann are another hidden-variable. A Managing Director title can involve compensation components like profit-sharing or carried interest-like structures, but without disclosed terms you generally cannot convert the role into a numeric net worth contribution.
Does the Y A Istel Foundation net assets number increase Yves-André Istel’s net worth?
Foundation assets shown on IRS Form 990-PF are not the same as personal wealth. The foundation is separate legal property used for philanthropy, so it should be treated as an organization’s financial snapshot, not as an add-on to his personal net worth.
What types of wealth are most likely missing from SEC-based Yves-André Istel net worth estimates?
A net worth estimate can ignore private investments, retirement accounts, and cash-like holdings because those usually are not itemized in public filings. If he built wealth over decades, those missing components can be the difference between a “floor” number and a realistic total.
What events could cause a sudden change in the estimate without obvious public news?
Watch for events that create disclosure obligations, for example large share sales, option exercises, or changes in indirect beneficial ownership. Even if he is not selling frequently, corporate actions or reorganizations that affect beneficial ownership can sometimes force an update.
If I want a more realistic total, how should I build a range estimate instead of picking a single number?
When the article concludes “likely higher but unknown,” the practical move is to treat the SEC-based ADI-derived figure as a conservative baseline and add scenario ranges for Richemont fees, equity-linked compensation, and private investment growth separately. Without numeric disclosures, the correct approach is scenario modeling, not replacing the baseline with a single guess.