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    Often referred to as the UK Listing Act, the UK Listing Rules reforms represent the most significant overhaul of the UK’s listing framework in over 30 years. While the reforms change how issuers approach disclosure by removing certain prescriptive requirements, they do not alter the underlying obligations. UK MAR continues to apply in full, requiring firms to identify inside information promptly, manage insider risk consistently, and disclose material information to the market in a timely way.  

     

    Key Highlights

    This article explains how the UK Listing Act changes disclosure processes and why insider risk management becomes more complex under an unchanged UK MAR framework.  

    • Reduced prescriptive requirements: The Listing Act removes certain formal processes and shifts responsibility to internal governance.
    • UK MAR remains unchanged: Firms must continue to identify and disclose inside information in line with existing obligations.
    • Earlier assessment is required: Firms must identify inside information before formal milestones are reached.
    • Judgment-based risk increases: Less structure creates greater potential for inconsistency and delayed disclosure.
    • Connected compliance is essential: Coordinated workflows and centralized controls are critical to managing insider risk.

    What is the the UK Listing Act?

    Often referred to as the UK Listing Act, the new UK Listing Rules (UKLRs) introduce a single listing category and reduce prescriptive requirements, without changing the market conduct obligations that apply to issuers.

    The new UKLRs came into force on 29 July 2024 and represent the most significant change to the UK’s listing framework in more than three decades. Introduced by the FCA following an extended period of market consultation, the Act’s objective was to simplify the listing regime and make it more attractive to a broader range of issuers.

    While the reforms remove certain prescriptive listing rule requirements, they do not alter the underlying framework governing market conduct. Issuers remain subject to unchanged obligations around the identification and disclosure of inside information, the accuracy of market communications, and the control of material non‑public information.

    Does the UK Listing Act Reduce Disclosure Obligations?

    While some formal approval requirements have been removed, core disclosure obligations and expectations around transparency remain unchanged.

    The reforms remove the requirement for shareholder votes on certain significant transactions under the previous class test thresholds. Instead, listed companies are generally required to announce such transactions to the market and ensure appropriate internal governance processes support decision-making. However, some events—such as reverse takeovers and cancellations of listing—continue to require shareholder approval.

    What has changed under the UK Listing Rules:

    • Removal of shareholder approval for certain significant transactions
    • Increased reliance on issuer-led governance and board decision-making
    • Greater flexibility in how transactions are executed and disclosed

    What has not changed under the UK Listing Rules:

    • Ongoing obligation to make timely market announcements under FCA disclosure rules
    • Continued requirements to ensure transparency of price-sensitive information
    • Responsibility to manage and control inside information under MAR obligations

    Overall, the UK Listing Rules reforms reshape how disclosure and transaction approvals are handled, shifting certain procedural requirements while maintaining core FCA obligations around transparency, market disclosure, and inside information management.

    How Does UK MAR Apply Under the New Regime?

    UK MAR, the UK Market Abuse Regulation governing insider dealing, unlawful disclosure, and market manipulation, continues to apply in full, requiring prompt identification, control, and disclosure of inside information regardless of Listing Rule changes.

    Under UK MAR, firms must:

    • Identify inside information promptly
    • Maintain accurate insider lists
    • Control the flow of confidential information
    • Disclose inside information to the market as soon as possible (unless delay is justified)

    Inside information remains defined as information of a precise nature that, if made public, would be likely to have a significant effect on the price of a financial instrument or related derivative, or on the market perception of a firm.

    Read more about MAR and the risk of market abuse in the UK, Europe and across the globe.

    Why The UK Listing Act Raises the Stakes for Insider Risk Management

    The shift to judgment‑based disclosure increases the risk of inconsistent decisions and delayed identification of inside information.

    Teams must proactively and consistently decide whether a matter constitutes inside information and when a MAR-compliant announcement is required — even where no specific Listing Rule obligation has been triggered.

    The FCA provided guidance in Primary Market Bulletin 52 that underscores the difficulty. The Bulletin highlights three specific scenarios where it has observed inconsistent approaches by issuers: offer processes, the preparation of periodic financial information, and CEO resignations and appointments. In each case, inside information was not always identified as soon as it arose.

    Reduced Disclosure Doesn’t Mean Reduced Risk

    Obligations to identify inside information, maintain insider lists, manage confidential information, and make timely public disclosures remain unchanged.

    The compliance challenge under the new Listing Act regime is more interpretive, not less demanding. Less reliance on formal process means more reliance on internal judgment. More reliance on internal judgment means a higher risk of inconsistency. And inconsistency in how inside information is identified and managed creates the perfect conditions for leaks, selective disclosure, and delayed announcements — all of which attract regulatory attention and set the stage for increased risk.

    Why a Connected Approach to Insider Risk Management Matters

    Managing disclosure, insider lists, trading restrictions, and communications as disconnected processes increases regulatory and execution risk.

    A single corporate event can now trigger multiple simultaneous obligations including:

    If those processes run in parallel but separately — across different systems, teams, or records — the risk of a missed trigger or contradictory documentation increases significantly, including:

    A connected approach — where disclosure decisions, insider list updates, restricted list controls, and communications review are coordinated within a shared framework — reduces the risk of gaps between teams and creates a defensible audit trail if the FCA chooses to review how a matter was handled.

    How MCO Enables Firms to Manage Compliance Under the UK Listing Act and MAR

    (MCO) MyComplianceOffice provides a single platform that helps firms manage disclosure obligations, insider risk, and regulatory compliance across market abuse, personal trading, and employee conduct.

    As firms move from prescriptive rules to judgment-based compliance, the strength of internal controls becomes the defining factor. MCO enables firms to operationalize a connected approach by:

    • Standardizing disclosure workflows
      Ensuring consistent assessment of inside information across scenarios
    • Centralizing insider and restricted lists
      Maintaining accurate, real-time records aligned to FCA requirements
    • Connecting the areas of compliance
      Managing core functions including insider information, deal review, personal trading and communications compliance on a single platform
    • Providing a defensible audit trail
      Capturing decisions, approvals, and actions to demonstrate compliance

    MCO’s robust single platform directly addresses a core risk introduced by the new Listing Act regime--inconsistency. The MyComplianceOffice platform provides a connected, technology-enabled framework that ensures decisions are made consistently, documented clearly, and executed in line with FCA expectations, with capabilities including:

    Ready to learn more? Request a demo today to see how MCO can help your firm stay ahead of UK Listing Act, UK MAR, and other compliance obligations.

    This post was written by Keith Pyke, Director of Solutions at MCO.

     

    Related Resources

    Frequently Asked Questions

     Often referred to as the UK Listing Act, the UK Listing Rules reforms introduced a single listing category for commercial companies and removed certain prescriptive requirements, without changing the underlying framework governing market conduct.  
    The reforms remove some formal approval and disclosure requirements, such as shareholder votes for certain transactions, but core obligations around timely market disclosure and transparency remain unchanged.  

    Yes. The UK Listing Act does not alter UK MAR, which continues to apply in full, including requirements to identify inside information, manage confidentiality, maintain insider lists, and disclose inside information promptly.  

    By reducing reliance on prescribed processes and increasing reliance on internal judgment, the new regime increases the risk of inconsistent identification and handling of inside information, including delayed disclosure and selective information flow.  
    Firms must identify inside information earlier and more consistently, as fewer events automatically trigger formal disclosure workflows and more decisions depend on internal assessment.  

    A single corporate event can trigger multiple overlapping obligations, including disclosure assessment, insider list updates, trading controls, and communications review. Managing these activities in isolation increases the risk of missed triggers and incomplete audit trails.  

    MCO provides a single platform to manage disclosure obligations, insider risk, and compliance workflows consistently across teams, supporting accurate records, coordinated controls, and defensible audit trails. 

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