The appeal of a 50:50 shareholding is obvious. Two equal partners, a shared vision, a sense of trust and fairness. But what happens when that trust breaks down?

The 50:50 structure is one of the most fertile grounds for shareholder disputes in English company law. When two equal shareholders fall out, the result is often a complete deadlock.  And where deadlock festers, an unfair prejudice petition under section 994 of the Companies Act 2006 is rarely far behind.

 What Is a Deadlock?

A deadlock occurs when shareholders or directors are unable to reach the majority required to pass a resolution or make a binding decision. In a 50:50 company, this can happen at virtually every level of governance:

• At board level: Two directors, each holding one vote, cannot agree on a course of action. One cannot outvote the other. The company becomes paralysed.
• At shareholder level: Ordinary resolutions require a simple majority (more than 50%). Special resolutions require 75%. Where each shareholder holds exactly 50%, neither can pass an ordinary resolution alone, and neither can block a special resolution without the other’s support.
• Operationally: Day-to-day decisions that require consensus (signing contracts, hiring staff, opening bank accounts, approving accounts etc.) can grind to a halt.

 Why Is the 50:50 Structure So Problematic? 

Unlike a 51:49 split, where one party has a casting vote and can ultimately drive decisions through, the 50:50 structure offers no tiebreaker. Unless the company’s articles of association or a shareholders’ agreement contain a deadlock resolution mechanism, the parties are stuck.

The Companies Act 2006 provides no statutory mechanism for breaking deadlocks, and the courts are reluctant to interfere in the internal management of a company simply because its shareholders disagree. Without contractual provisions to fall back on, the only realistic routes out are often:

1. Negotiation and compromise (which may be impossible if the relationship has broken down);
2. A voluntary buy-out (usually following an expert valuation);
3. Winding up on the just and equitable ground under section 122(1)(g) of the Insolvency Act 1986; or
4. An unfair prejudice petition under section 994 of the Companies Act 2006.

Unfair Prejudice: The Legal Framework

Section 994 allows a member of a company to petition the court on the grounds that the company’s affairs are being or have been conducted in a manner that is unfairly prejudicial to the interests of its members (or some of them).

The leading case, O’Neill v Phillips [1999] 1 WLR 1092, established that:

• Unfair prejudice is broad and equitable in nature;
• It is not enough that the petitioner has suffered prejudice – the conduct must also be unfair; and
• Fairness is assessed not just by reference to strict legal rights, but also by reference to legitimate expectations – particularly in quasi-partnership companies.

Warning Signs That a Claim May Be Coming

Disputes rarely erupt without warning. Recognising the signs early gives you the best chance of resolving matters before litigation becomes inevitable.

Communication breaks down. Emails go unanswered, responses become terse and formal, solicitors are copied into routine correspondence, or one party begins making decisions unilaterally. When two people who used to speak daily start communicating only through lawyers, the relationship has almost certainly passed a point of no return.

Exclusion from management. One director is removed from email chains, denied access to systems or bank accounts, left out of key meetings, or formally removed from the board. In a quasi-partnership, exclusion from management is very often unfairly prejudicial – regardless of whether it is technically permitted by the articles.

Unusual financial activity. Unexplained salary increases, irregular expenses, contracts with connected parties on non-arm’s-length terms, assets being transferred out of the company, or dividends withheld without a clear commercial reason. These behaviours may constitute misappropriation or self-dealing – both common grounds for a petition.

Attempts to dilute shareholding. New shares issued without authorisation, or restructuring that shifts the balance of power away from 50:50. Any attempt to alter the equal balance without consent may itself constitute unfair prejudice.

Entrenched deadlock. The company cannot pass resolutions on basic matters. Prolonged deadlock is itself a form of prejudice, particularly where one party is using their blocking power to frustrate the other, against the best interests of the company.

Competing business activity. One party sets up or works for a rival, and diverts business. Directors owe fiduciary duties to the company, including a duty not to exploit its business opportunities for themselves – breach of which can found a petition in its own right if it causes prejudice.

Attempts to amend constitutional documents. Unilateral attempts to change the articles or act inconsistently with a shareholders’ agreement are a strong indicator that one party is trying to gain an advantage.

Practical Tips: What to Do If You Spot the Warning Signs

• Take legal advice early. The earlier you act, the more options you have. Waiting until a threatened prejudicial action has actually occurred, or a petition has been issued, significantly narrows your choices and increases your costs.

• Preserve evidence. Keep contemporaneous records including emails, WhatsApp messages, board minutes, financial documents, and notes of significant conversations. Evidence gathered at the time is far more persuasive than reconstructed accounts.

• Do not act unilaterally. Removing the other director, changing bank signatories, or locking someone out of the office is likely to constitute unfair prejudice in its own right and will significantly weaken your position in any subsequent litigation.

• Review your constitutional documents. Understand what your articles and shareholders’ agreement say about deadlock, share transfers, pre-emption rights, and director removal before taking any action.

• Consider mediation. It is faster, cheaper, and more flexible than litigation. Courts actively encourage alternative dispute resolution, and a failure to engage can have costs consequences even if you ultimately succeed.
• Protect the business. Ensure key contracts and relationships are maintained, staff are not drawn into the dispute, and statutory obligations continue to be met. Allowing the business to deteriorate will reduce the value of any eventual settlement or court order
• Consider a without prejudice offer. An offer to buy out the other shareholder at a fair value can be a powerful tactical move. In O’Neill v Phillips, Lord Hoffmann made clear that such an offer — without a minority discount, in a quasi-partnership — may be sufficient to make a petition inappropriate. This principle can be used both offensively and defensively.

If Litigation Is Unavoidable

The most common remedy sought in unfair prejudice proceedings is a buy-out order where one party purchases the other’s shares at a fair value determined by the court. In quasi-partnerships, this is typically on a pro rata basis without a minority discount. However, the Court has broad discretion to make whatever order it considers would best remedy the unfair prejudice suffered.

Valuation is often the most contested aspect of unfair prejudice proceedings, with disputes arising in respect of the appropriate date of valuation; whether a discount applies; and whether the value should be adjusted for any misconduct.

Where the relationship between the parties has broken down completely and the company has little value, winding up on the just and equitable ground may be a preferable option – though it is a drastic remedy and the court will not order it where a more proportionate alternative is available.

Conclusion

The 50:50 structure is a ticking time bomb without the right safeguards. Most disputes can be resolved without litigation, but only if the warning signs are recognised early and the right steps are taken promptly.

• Act early – the longer a dispute festers, the more entrenched and expensive it becomes;
• Take specialist advice – the stakes are high and this is a specialist area of law;
• Protect the business – its interests must not be sacrificed in the heat of a personal dispute; and
• Consider all options – negotiation, mediation, and structured buy-outs are almost always preferable to litigation.

The author is Katie Allard, Senior Associate in the Dispute Resolution team at Kingsley Napley LLP