Skip to main content

News story

November 22, 2023

When dealmakers bite down on a MAC clause

Court ruling highlights the challenge for buyers if a deal turns sour. Any MAC clause needs to be well drafted, so it is unambiguous.

picture of hands looking like they're eating an imaginary burger with the riaa barker gillette logo in the middle of it representing someone biting down on a MAC clause.

The takeover of Twitter by Elon Musk hit the headlines last year when the billionaire tried to stop the deal, arguing that Twitter had misled him about the amount of spam on the platform.

When he announced his intention to abandon the acquisition rather than pay an over-priced valuation, the board of Twitter took legal action to enforce the original agreement, which saw a victory for the little blue bird’s brand when they finally completed the deal.

Buyers generally look to protect themselves against change during dealmaking through material adverse change (MAC) clauses. These allow a party to a contract to back out or claim compensation if something happens that has a severe impact on the commercial transaction.

However, the challenge of getting MAC clauses right has just been reinforced by the latest ruling from the Court of Appeal in the case of an IT consultancy acquisition where predicted revenues failed to materialise.

The case involved the acquisition of IT consultancy Copperman by global technology services company Decision Inc.

In the sale and purchase agreement (a document that forms a binding legal contract obliging the buyer to buy and the seller to sell, generally known as a SPA), Copperman’s shareholders offered various contractual warranties about the state of the company’s business. These included stating that “Since the Accounts Date … there has been no material adverse change in the turnover, financial position or prospects of the Company”.

The nature of Copperman’s business meant it had a small number of large projects going on, making a pipeline of large contracts essential to its future performance. Negotiations for the sale focused on the potential business in the pipeline. During the dealmaking process, the buyer continually asked for an up-to-date position. 

The sellers sometimes responded, but when they did, it was to present a more optimistic picture than the actual position, with inaccurate descriptions of the progress of crucial contracts that were critical to future performance. Even before Copperman completed the sale, they had been performing significantly worse than the forecast, with turnover running at half of predictions.

Although Decision Inc. expressed concerns at the information that Copperman gave them, the deal went ahead with an initial lump sum paid on completion and further payments under an earn-out if the company hit specific earnings targets.

When the predicted turnover failed to materialise, and the company started to generate substantial losses, Decision Inc. proposed restructuring the acquisition, asking for repayment of 40% of the initial purchase price and adjusted earn-out targets. Copperman’s shareholders refused, and Decision Inc. took action, claiming a breach of warranties in the SPA. 

When the case reached the High Court, the judge agreed there had been a breach of the MAC warranty, awarding damages of £1.31m to Decision Inc. But now, the Court of Appeal has ruled that the High Court applied the wrong test in deciding whether there had been a change in the company’s prospects.

“The Appeal Court’s ruling says the earlier judgement focused on the wrong date, comparison, reference data, and assessment period. It might seem surprising that so much could be wrong, but this speaks to the complexity of MAC clauses and the challenge in interpretation.”

Explains our head of corporate and commercial, Victoria Holland

“There is no new law in this judgement, just a reinforcement of how difficult it can be to assess material adverse change. Any MAC clause needs to be well drafted, so it is unambiguous, but that’s not easy, and it is why these clauses and warranties tend to be the focus of much negotiation during a deal.”

Victoria added: “It’s about finding a balance between a cover-all, which may be so generic as to be difficult to pin down, and one that is so specific that it may not relate to given circumstances.

Contact partner and head of corporate and commercial Victoria Holland today.

Note: This article is not legal advice; it provides information of general interest about current legal issues.

Stay in touch

Subscribe to our newsletter

Stay in touch

By completing your details and submitting this form you confirm you are happy for us to send you marketing communications and that you agree to our Website Privacy Policy and Legal Notice and to us using Mailchimp to process your data.


Sending

News/Insight

  • Double jeopardy of digital asset inheritance planning amid probate delays
    Hidden digital assets and mounting interest on inheritance tax bills are creating a costly double risk for families dealing with estates following the death of a loved one, as probate delays continue to impact thousands across England and Wales, addi


    Read more
  • Deal or no deal? Keeping negotiations on track
    How to keep commercial deals on track with Heads of Terms, NDAs and exclusivity, improving efficiency, reducing risk and avoiding delays.


    Read more
  • Rights and wrongs: How AI is reshaping Employment Tribunal claims
    AI may be a familiar presence in the workplace, but it’s now starting to appear somewhere less expected: the Employment Tribunal (ET). Grayson Stuckey explores this trend – and what it means for employers.


    Read more
  • Renters’ Rights Act: why process and paperwork matter more than ever for landlords
    The Renters’ Rights Act has now passed into law, marking one of the most significant shifts in the private rented sector in a generation. Most of the new measures will take effect in May 2026, with a national landlord database to follow later in th


    Read more
  • Understanding the Roles of Executors and Trustees
    When making a will, you place significant trust in those appointed to carry out your wishes. Executors and trustees are key roles, often held by the same people, but their responsibilities differ. Understanding these roles and their obligations helps


    Read more

What they say...

  • W Sandover, April 2026
    Boundary Wall dispute “Although (for complex, not relevant) reasons, this matter never reached the point of either negotiations or a court case, Barker Gillette staff provided us with excellent support. I would certainly go back to them in the

  • Client, April 2026
    Excellent suppy “Karen Cole supported me through a difficult time with warmth and professionalism. She made the entire process as smooth as possible, responding quickly to communication and giving clear advice. I would highly recommend Karen to

  • Client, April 2026
    So helpful! “Pippa Marshall listened and offered supportive, practical advice. She was very friendly, easy to talk to and did not pressure me to make any costly decisions during my free 30-minute consultation. I would definitely recommend Pippa

  • Nika Franke-Matthecka, April 2026
    “We had an excellent experience working with Michael Davies and his team on the sale of our property. They were efficient, knowledgeable, and highly diligent throughout the entire process. Communication was always prompt and clear, which made w

  • Paul Woodman, March 2026
    Will writing “Excellent service from start to finish. Efficient and good value. Charlotte was very professional, knowledgeable and understanding.”

Read more
Send this to a friend