Someone wants to buy your company. You were not looking for them, they came to you.

It is a moment many business owners experience at least once, especially when the company is performing well, has a strong reputation in its sector, and numbers that speak for themselves. It is also a moment where it is easy to make mistakes that are hard to undo.

The first thirty days are not a formality. They are the phase where your negotiating position is either built or lost.

Why an unsolicited acquisition offer is different from a planned sale

When a business owner decides to sell in a structured way, they start with a real advantage: time to prepare, clean up the financials, build an equity story, and choose who to approach.

When someone approaches you first, the dynamic reverses. The other side has already decided you are a target. They have run their numbers. They likely know what you are worth and have a figure in mind.

You, at that moment, may never have seriously considered selling. Or you may have thought about it, but without a plan. That asymmetry is the real risk of the first thirty days.

The first mistake: responding too quickly

Receiving an acquisition offer does not mean you have to respond immediately. Yet many business owners, driven by enthusiasm, curiosity, or fear of missing out, open a conversation before understanding who they are actually talking to.

In the first week, the only sensible move is to gather information without giving any away.

Who sent the message? Is it an advisor acting on behalf of a fund? A competitor reaching out directly? A broker working on commission for someone else? The answer changes everything: intentions, timeline, negotiating style and, above all, the valuation they have in mind.

A brief, cordial, non-committal reply buys you the time you need to understand the context.

How to qualify the other side

In the second week, the focus shifts to qualifying the counterpart. There are questions worth asking, directly or through informal channels, before any formal meeting takes place.

The first is who they represent. A private equity fund, a strategic investor (typically a competitor or a complementary player) and a family office think very differently. The fund focuses on exit multiples. The strategic buyer looks at synergies. The family office often seeks long-term stability. They are not the same, and they should not be treated the same way.

The second is whether they have completed similar acquisitions before. A buyer’s track record says a great deal about their operational seriousness and their ability to close. A player who has never completed a deal of this size is a risk, not an opportunity.

The third is why now. Timing is rarely coincidental. They may be closing a fundraising round, trying to get ahead of a competitor, or responding to a sector that has become attractive for external reasons. Understanding the “why now” gives you a real negotiating edge.

What not to do in the first thirty days

Some things feel natural at this stage. Almost all of them are mistakes.

The first is sharing financial data without a signed non-disclosure agreement. An NDA is not complete protection, but it is the minimum threshold before discussing revenue, EBITDA, or margins. Doing so before this step puts you in a weak position.

The second is saying no too quickly. An unexpected approach, even if it does not match your expectations, may be the first signal of a market that is starting to move. Closing the door before understanding the context is a strategic mistake.

The third is involving people inside the company. Speaking with the commercial director, the CFO, or, worse, minority shareholders before you have a clear picture can create instability. Rumours spread. Management gets unsettled. Clients sometimes sense it too.

The fourth is handling the negotiation alone. If you have never been through a transaction of this kind, this is not the right time to learn on the job.

When to bring in an advisor

The most common question at this stage is straightforward: do I really need to pay an advisor if the offer has already arrived on its own?

The answer is yes, precisely because the offer arrived on its own.

The buyer already has a team: a financial advisor, probably an M&A lawyer, and an analyst group that has already studied your company. You are entering a game where the other side has been playing for longer.

An M&A advisor at this stage is not there to find you a buyer. They are there to assess whether the valuation being proposed reflects market value or is below it, to structure the conversation before you lose ground in the early weeks, and to manage which information you share and which you hold back.

The right time to bring them in is well before the first formal meeting, not after. Once you sit down at the table unprepared, part of your negotiating leverage is already gone.

The logic of thirty days

This is not about slowing things down for the sake of it. It is about using time actively.

By the end of the first week, you know who contacted you and why. By the end of the second, you have assessed whether the counterpart is qualified and serious. By the end of the third, you have decided whether it makes sense to go deeper and on what terms. By the end of the fourth, you have a clear position: either you enter an exploratory phase with the ground rules defined, or you close the door politely without burning the relationship.

This sequence does not happen on its own. It requires a guide, someone who knows how these early stages work and where the risks tend to hide.

One last thing

Receiving an unsolicited acquisition offer is a positive signal about the value you have built. But the value a buyer attributes to you at the start of the process is almost always lower than what you could achieve with a negotiation handled the right way.

The first thirty days do not determine the final price. They determine whether you will still have the leverage to negotiate it.