The Real Rules of an M&A Transaction

19 May 2026

 

The sale or acquisition of a business is a major strategic transaction, the success of which depends on a thorough understanding of the legal, financial, and operational risks involved. Beyond the negotiated price, an M&A transaction is, above all, an exercise in allocating risks among the parties. Proper preparation and methodical structuring are essential to ensure the stability and longevity of the agreement.

This article outlines the fundamental principles governing this type of transaction, which should guide any sale or acquisition process.

 

The Contract : A Tool for Protection and Risk Management

A business sale contract is never limited to setting a price. Its primary purpose is to allocate two key risks :

  • For the seller : total or partial non-payment of the sale price.
  • For the buyer : the existence of unforeseen obligations or liabilities discovered after the transaction is concluded.

A clear understanding of these issues enables the negotiation of robust contractual provisions tailored to the context of the transaction.

 

Transaction Structure : Sale of Shares or Sale of Assets

The choice between a sale of shares and a sale of assets directly influences the legal scope of the transaction, its level of complexity, and the risks assumed by the parties.

 

Structure Characteristics Considerations
Sale of shares Complete transfer of the business, including its history Simplified operational process, but assumption of existing liabilities
Sale of assets Targeted transfer of selected elements Better risk control, but a more cumbersome and technical process

 

Factors That Can Compromise a Transaction

Transactional difficulties often stem from non-legal factors. Among the most common causes are :

  1. Underestimating the amount of work required;
  2. Significant factual complexity;
  3. Lack of alignment among the professionals involved;
  4. Emotional or unpredictable stakeholders.

Proactive management of these elements helps reduce delays, costs, and the risk of deal breakdown.

 

Due Diligence : An Essential Risk Management Process in an M&A Transaction

Due diligence is a cornerstone of any transaction. It allows, in particular, to :

  • confirm the accuracy of the information provided;
  • identify undisclosed or problematic issues;
  • adjust the sale price, if necessary;
  • guide contractual protections.

It is important to remember, however, that the buyer can only access the information the seller agrees to disclose, hence the need for a structured and comprehensive process.

 

Seller’s Perspective : Securing Payment for the Transaction

For the seller, the top priority is to ensure receipt of the purchase price. Several mechanisms can provide this protection :

  • avoiding non-essential holdbacks;
  • obtaining security to guarantee the balance of the purchase price;
  • preventing subrogation of the balance in favor of the buyer’s lender;
  • limiting the portion of the purchase price contingent on future performance (earn-outs).

The soundness of the transaction depends largely on the rigor of these mechanisms.

 

Buyer’s Perspective : Mitigating Risks and Surprises

The buyer of the shares assumes not only the assets but also the company’s history and obligations. To reduce risks, it is recommended to :

  • conduct a comprehensive due diligence review;
  • obtain indemnification commitments from solvent persons;
  • negotiate a holdback on the purchase price.

These measures help protect the investment and limit exposure to unforeseen liabilities.

 

Post-Transaction Disputes : A Risk to Anticipate

Disputes that arise after closing often result from ambiguous clauses or gray areas. The most common sources of dispute include :

  • non-compete clauses;
  • earn-out mechanisms;
  • overly aggressive pre-closing reorganizations;
  • adjustments to the purchase price.

Precise and comprehensive drafting is the best protection against these risks.

 

The Golden Rule of a Buy-Sell Transaction : Resolve the Issues Before the Closing

The strongest transactions are those in which issues are identified and resolved before signing. Best practices include :

  • early identification of sensitive issues;
  • transparent discussions;
  • clear and comprehensive documentation;
  • the implementation of appropriate resolution mechanisms.

An issue left unresolved before closing will, in most cases, become a dispute after the transaction.

The success of an M&A transaction depends on rigorous preparation, a thorough risk analysis, and precise contractual documentation. Guidance from experienced professionals helps structure a balanced agreement that aligns with the parties’ objectives and protects their interests.

 

 

Are you considering selling or acquiring a business?

Contact us today.

Our team of corporate lawyers has the expertise to guide you through every step of the process.

 

 

 

Author :

 

Jacques Cossette-Lesage,
Jacques.Cossette-Lesage@SteinMonast.ca
418-640-4406
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