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When Siblings Inherit the Same Structure and Disagree

Alfonso Martínez RuizFounder and Chief Executive Officer, Montclare Capital Partners · Published August 2026 · Reviewed September 2026

Dividing an estate into equal parts feels like the fairest thing a parent can do, and in most families it is the least contested decision in the whole will. Three children, three equal blocks of shares in the holding company, no preference expressed and no explanation required. The parent avoids having to say out loud that one child is better suited to run things than another, which is usually the real reason the division is equal.

The difficulty appears about eighteen months later. Equal ownership is a fair way to divide value and a poor way to design a decision making body. Nothing in the will says who chairs, who signs, what happens when two of the three want to sell and one does not, or how the one who wants out is paid. The parent resolved the question of what each child receives and left untouched the question of how they are supposed to act together for the next forty years.

Where the disagreement actually starts

The trigger is almost never a disagreement about strategy in the abstract. It comes from the collision of three different personal situations with one indivisible asset.

One sibling works in the business and draws a salary from it, so the company is both his employer and his investment. One lives abroad, pays tax somewhere else and would rather hold a liquid portfolio than an illiquid stake in something she cannot influence. One has a mortgage, a divorce or a business of her own that needs capital, and looks at a holding company distributing very little and thinks about what her third would be worth in cash.

None of those positions is unreasonable, and that is what makes the situation hard. There is no villain to identify and no obviously correct answer, only three people with different needs and an asset that was designed to serve one.

Two further sources of friction are worth naming because they are so often unspoken. The first is the perception of unequal effort, where the sibling who runs the business believes his salary undercompensates him and the others believe it is a distribution in disguise. The second is spouses, who have no formal role, hear only one side of every meeting and are frequently the party pressing hardest for a sale.

Deadlock is a structural condition, not a mood

Where ownership is split evenly between two branches, or where an unspoken convention requires unanimity, deadlock is not an accident. It is a property of the design, and it will occur eventually regardless of how well the siblings get on.

Its consequences run deeper than a stalled decision. A company that cannot resolve a governance dispute cannot easily refinance, because lenders read shareholder agreements and ask who has authority. It struggles to complete a transaction, because a buyer will not spend money on diligence without knowing who can sign. Auditors and banks ask questions. Key employees, who can see perfectly well what is happening, start taking calls from competitors. The value of the asset falls while the argument about how to divide it continues.

The other cost is time. Disputes of this kind consume years, and the siblings who eventually settle usually settle on terms not very different from those available at the outset, having paid for the delay in fees and in a business that stopped investing.

Mechanisms for breaking a deadlock

Several standard devices exist, and each buys resolution at a price worth understanding before it is adopted.

The mildest is an escalation clause: a defined period of negotiation, then mediation by a named person, then a binding decision by an expert or an arbitrator on the specific matter in dispute. This preserves the relationship better than anything else and works well for recurring operational questions.

Next comes the casting vote, given to an independent chairman appointed by agreement or by a named third party. Families resist this because it means handing a decision to an outsider, but a chairman who can break a tie also changes behaviour before ties occur, since neither side benefits from a decision reached by somebody who is not in the family.

Then come the exit mechanisms. A put option lets a shareholder require the others to buy her out on defined terms. A call option lets the others require her to sell. The reciprocal offer clause, in which one party names a price and the other chooses whether to buy or sell at it, is elegant on paper and dangerous in practice, because it favours the sibling with access to liquidity rather than the one with the better argument. In a family where one branch is cash rich and the other is not, it is an instrument of expropriation with a fair sounding name.

Last is dissolution, which no family should choose but every set of documents should address, because the absence of an agreed route is what pushes a dispute towards whatever statutory or judicial mechanism the relevant jurisdiction provides. Those routes exist in most company law systems and vary widely in speed, cost and outcome.

Buying a sibling out means agreeing what it is worth

Every exit mechanism eventually reduces to one question, and it is the question families are worst at answering. What is a minority stake in a private holding company actually worth?

The seller values her third as a third of the whole. The buyers point out that a minority stake with no control, no market and no exit is worth considerably less than that, and both positions are supportable. Left to be resolved at the moment of exit, this becomes a negotiation in which the outcome depends on who is in more of a hurry.

The answer is to agree the method in advance rather than the number. That means specifying who values, on what basis, and with what adjustments. Whether the valuer is a named firm or one appointed by a professional body. Whether the basis is a multiple of maintainable earnings, a net asset value with property revalued, or a formula fixed by the parties. Whether a discount for lack of control or lack of marketability applies, and if so at what rate. Whether real estate is appraised independently and how often. What happens if either side disputes the result.

A method agreed while everyone is on good terms will produce a number that both sides can live with. A method argued about while one sibling is trying to leave will produce two valuations several years apart.

Paying for it without dismantling the structure

Agreeing a price solves only half the problem. The remaining half is that the money usually does not exist in cash.

The workable answers are conventional and should be written into the documents. Payment in instalments over a defined period, with interest and with security. A company buyback where the holding company itself acquires the shares, which requires checking distributable reserves and the relevant capital maintenance rules before anyone relies on it. External finance secured on the underlying assets. The transfer of a specific asset in partial satisfaction, which sometimes suits a family holding several properties. Or a partial sale of the operating business to a third party, which is the option nobody wants but which at least converts the argument into a market price.

The tax treatment of each route differs, sometimes sharply, and it differs again where the exiting sibling is resident in another country. That analysis belongs at the point when the mechanism is drafted, not when it is exercised, because a clause that is efficient for one sibling and punitive for another will simply not be used.

There is also a question of what the departing shareholder gives up besides the shares. An exit is the right moment to settle director resignations, personal guarantees given to lenders, loans in either direction, the use of family property, and any continuing role in a foundation or philanthropic vehicle. Handled together, these are administrative. Handled one at a time over the following two years, each of them reopens the argument.

The clauses that should have been agreed first

Reading backwards from the disputes, the same short list recurs. A shareholders agreement signed by the next generation rather than inherited by them. A defined governance structure with a chair, a quorum and a decision list. A distribution policy expressed as a formula. A valuation method with a named appointment mechanism. Pre emption rights with a workable timetable. A deadlock procedure. Rules for what happens on death, divorce, insolvency or a shareholder moving abroad. And a review clause, so the whole arrangement is reconsidered periodically rather than becoming an artefact.

Most of this can be prepared while the parent is alive, which is the single most useful thing a family in this position can hear. Documents signed by siblings in front of a parent are signed in a different atmosphere than documents negotiated between siblings after a funeral.

When nothing was agreed

Many families reading this have already inherited without any of it, and the situation is recoverable. The sequence that works is to separate the questions and answer them in order.

Establish first what everybody actually wants, individually and privately, because siblings frequently negotiate against positions the other side does not hold. Then obtain an independent valuation so that the discussion has a common reference point. Then decide, on the evidence, whether this is a family that will continue owning together or one that is heading towards a separation, and stop pretending otherwise if it is the second. Then document whichever answer it is.

It helps to run that sequence with somebody who is not a sibling. Each of the three will otherwise arrive with an adviser of their own, and three advisers with three mandates produce a negotiation rather than a design. A single coordinator who reports to all of them, on terms everyone has agreed, can put the same set of facts in front of each branch and take the arithmetic out of dispute.

The outcome that costs the least is rarely the one where everybody stays. It is the one where the family decides quickly, on good information, and writes it down.

This article is informational and does not constitute legal advice. The law differs by jurisdiction and the treatment of any matter depends on its facts. Each engagement is subject to scope and applicable regulation.

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