Mergers and divisions 2026: what the new law asks of your SL

There comes a moment in the life of many companies when the corporate structure gets too small or, the other way round, too tangled. Joining another business to gain size, separating a line of activity that already works on its own or simplifying before a generational handover are business decisions that, in legal terms, are called mergers and divisions. They sound like something for big corporations, but any Spanish limited company (SL) can end up there.

Mergers and divisions: what they are exactly

A merger brings two or more companies together into one: the assets, the shareholders and the activity end up living under the same legal roof. It can be done by one company absorbing another or by creating a new one that takes in all of them.

A division goes the opposite way: part of a company’s assets is split off and transferred to another company, either an existing one or one newly created. Sometimes only one branch of activity is separated and the original company stays alive; other times the company is divided completely.

Both operations share something that sets them apart from an ordinary sale and purchase: the assets are transferred as a block and the shareholders of one company become shareholders of the other. That is why the law groups mergers and divisions under the name of structural modifications and surrounds them with safeguards.

The three situations that lead to mergers and divisions

Mergers and divisions rarely come from a legal impulse. They usually arrive along one of these three paths:

  • Gaining size. Two businesses that already work side by side decide to stop being two.
  • Separating what already stands alone. A line of activity that has grown inside the company and is asking for a life of its own: its own accounts, its own shareholders and its own risk.
  • Preparing a generational handover. Simplifying the structure before the children come in or the founders step out, so the split does not end in conflict.

None of the three is a purely legal decision. The legal part comes afterwards, to give shape to something that has already been discussed in the boardroom or at the kitchen table.

The legal framework for mergers and divisions since 2023

The rule that governs mergers and divisions in Spain today is Royal Decree-Law 5/2023, of 28 June, published in the BOE on 29 June of that year. Its Book One deals with structural modifications: transformation, merger, division and global assignment of assets and liabilities, as well as cross-border operations.

That text replaced the earlier Law 3/2009, of 3 April, on structural modifications of commercial companies, repealed with effect from 30 June 2023. If you are working with a template or a manual dated before then, it is worth reviewing it: the framework changed.

What the law requires of mergers and divisions

Book One opens with a block of preliminary and common provisions that apply to this type of operation. Translated into what you will actually have on your desk, there are four pieces.

A common draft terms document

The document that explains what is being joined or separated and on what conditions. It is the backbone of the operation: the reports, the shareholders’ meeting resolutions and the later registration all hang from it. If the draft is weak, everything that comes after it will be weak too.

A balance sheet that reflects the real situation

A convenient snapshot will not do. The balance sheet has to show how the company really stands, because the split rests on it: what each shareholder receives and what each company takes on.

Safeguards for shareholders and creditors

The law devotes a section of its own to protecting whoever does not take the decision but does carry its consequences. Shareholders and creditors have ways to obtain information and to make claims if something does not add up, and that right cannot be sidestepped.

Publicity and registration at the Commercial Registry

In mergers and divisions the operation is not a private matter between shareholders. It has to be given publicity and registered at the Commercial Registry, the point at which it takes effect against third parties.

Order matters more than speed

The temptation in these operations is always the same: to rush. Close the deal with the other side, sign, and the paperwork will sort itself out. With mergers and divisions that shortcut is expensive, because each piece rests on the previous one and a badly drafted project forces you to redo the whole chain.

It is also worth looking beyond the Commercial Registry. Mergers and divisions touch contracts with clients and suppliers, licences, leases, staff and tax. None of that is solved simply by registering the deed, and all of it is handled better if it has been anticipated from the start.

Tecem, alongside companies in Málaga and Benalmádena

At Tecem we work with companies in Málaga and Benalmádena on mergers and divisions, from the first question to the final registration. The usual thing is to start with a simple conversation: what you want to achieve, what structure you have today and what moving it involves.

No two operations are alike. The size of the company, the number of shareholders, the type of assets being moved and the position of the creditors change the route completely, so mergers and divisions do not take a textbook recipe: every case needs its own analysis before the first step.

Frequently asked questions about mergers and divisions

Does a merger mean closing down one of the two companies?
Not in the sense of a liquidation. In a merger by absorption, the absorbed company is extinguished but its assets and its shareholders pass to the absorbing one; there is no closing down with a share-out and the shutters pulled down.

Is a merger or a division taxed like a sale?
They are not the same thing. These operations have their own tax treatment, different from that of an ordinary sale, and it varies according to how the operation is structured. It is one of the points worth having analysed before deciding anything, not afterwards.

Is an agreement between the parties enough for the operation to take effect?
No. Besides the agreement, the law requires it to be given publicity and registered at the Commercial Registry. Until that moment it does not take effect against third parties.

What happens to employees and contracts in force?
As the assets are transferred as a block, contracts, licences and employment relationships are affected and have to be reviewed one by one. It is one of the parts that demands the most preparatory work in mergers and divisions, and it is worth analysing it with your advisers before signing anything.

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