Panama’s sociedad anónima, governed by Law 32 of 1927, is one of the most flexible corporate structures in the region. Incorporating one requires very little: a pacto social, a resident agent, and not much else. That same flexibility, however, carries a quiet cost: Panamanian law says almost nothing about how shareholders should relate to one another once the company is up and running.

The pacto social — the document filed with the Public Registry that gives the company its legal existence — sets out the corporate purpose, capital, directors, and little more. It doesn’t address what happens when shareholders disagree, when one wants to sell their stake, or when one dies. That’s the role of a separate document: the shareholders’ agreement.

What it is, and why it’s different from the pacto social

The shareholders’ agreement — sometimes called a partners’ agreement or a parasocial pact — is a private contract among a company’s shareholders. Unlike the pacto social, it is not filed with the Public Registry: it is confidential, and it can be amended by agreement among the parties without any registration procedure.

That difference is not a technicality. It is exactly what makes the document valuable: it lets shareholders agree on specific rules — governance, share transfers, exit — without exposing them to third parties or leaving them to the generic interpretation the law otherwise provides.

What a complete shareholders’ agreement should contain

There is no single template — every company has a different ownership structure and risk profile — but a well-built shareholders’ agreement in Panama should cover, at minimum, the following:

• Governance. Which decisions require a simple majority and which require unanimity or a qualified majority. Without this, any disagreement between shareholders turns into a fight over the rules themselves, not the substance.
• Transfer restrictions. A right of first refusal before a shareholder can sell their stake to a third party, and terms for permitted transfers among family members or by inheritance.
• Drag-along and tag-along clauses. What happens if the majority decides to sell the company, and what protection the minority shareholder has if it’s the majority selling its stake instead.
• Valuation mechanism. An objective formula or method (independent appraisal, EBITDA multiple, book value) for pricing shares on exit — agreed before any disagreement over that price exists.
• Deadlock resolution. What mechanism kicks in when shareholders — typically in 50/50 structures — cannot agree on a key decision.
• Exit events. What happens to a shareholder’s stake in the event of death, incapacity, divorce, or voluntary withdrawal.
• Non-compete and confidentiality. Protecting the company from a departing shareholder who could compete directly or use sensitive information.

Drag-along and tag-along: the clauses that cause the most confusion

Of everything listed above, two clauses deserve separate explanation because they’re routinely confused with each other:

Drag-along. If majority shareholders decide to sell the company to a third party, this clause lets them force minority shareholders to sell as well, on the same terms. It protects the buyer — and the majority — from a minority holdout blocking a full sale of the company.

Tag-along. If majority shareholders sell their stake, this clause gives minority shareholders the right to sell theirs on the same terms. It protects the minority from being left bound to a buyer they never chose and with whom they have no prior relationship.

Without these two clauses, two scenarios become common: a full company sale blocked by a single minority shareholder, or a minority shareholder who ends up tied to a third party entirely outside the original relationship, with no say in the decision.

How it’s formalized in practice

Formalizing a shareholders’ agreement in Panama doesn’t require a public deed or registration with the Public Registry — though shareholders can choose to notarize it if they want an added layer of certainty over its date and content. In practice, the process follows these steps:

• Diagnosis. Identify that particular company’s likely friction points — not just current conflicts, but those that could reasonably arise given the ownership structure, the industry, and the number of shareholders.
• Joint drafting. The agreement is drafted together with the shareholders, not for them. A document imposed by a single party tends to generate resistance and, in practice, often ends up unsigned.
• Signing. It is signed with the same formalities as any private contract between capable parties. No public deed is required, unless the shareholders choose to notarize it.
• Periodic review. The agreement should be revisited every time the ownership structure changes — a new shareholder joining, one exiting, or a material change in the business.

When it should be signed

The correct answer, almost without exception, is: the same day the pacto social is signed — not years later, once a disagreement is already on the table. A shareholders’ agreement negotiated in the middle of a conflict is no longer a governance document; it’s a late attempt at a fix, and it arrives with every disadvantage of urgency and accumulated distrust.

For companies already operating that never formalized this document, the good news is that it’s not too late — as long as the shareholders remain able to negotiate in good faith, without an active conflict already in play.