European Listing Reform: The UK Listing Rules and the EU Listing Act

Introduction

European listing reform is the regulatory response to the multi-year migration of European issuers toward US listings. The UK Listing Rules came into force July 29, 2024, marking the biggest changes to the UK listing regime in over 30 years. The EU Listing Act was adopted October 8, 2024, with main amendments effective December 4, 2024 and the rest phased in through March and June 2026. Both reforms address common themes (lower free-float thresholds, flexibility on dual-class share structures, simplified prospectus requirements, faster IPO timing) but with distinct UK and EU approaches reflecting the post-Brexit regulatory divergence. Both aim to win issuer mandates back from NYSE, Nasdaq, and HKEX, and 2026 tested that aim: with the new rules in place, London recorded a single IPO in the third quarter and EMEA its weakest ECM quarter of the year. The reforms helped at the margin, but demand depth and the macro backdrop decide where Europe lists.

UK Listing Rules (2024)

The Financial Conduct Authority's comprehensive overhaul of UK listing regulations effective July 29, 2024. Key elements: replacement of premium and standard segments with a single listing category, a 10 percent free float carried over from the 2021 reforms, more flexible dual-class share structures, and a disclosure-based regulatory approach that aligns UK practice with US-style flexibility. The reforms are designed to make London more competitive against NYSE, Nasdaq, and HKEX for issuer mandates post-Brexit.

Single Listing Category

The new rules replaced the previous premium and standard listing segments with a single listing category for commercial companies. The simplification removes complexity that had constrained UK listings and mirrors US-style single-tier standards.

Free Float Reduction

The free float requirement of 10 percent (reduced from 25 percent under FCA Policy Statement PS21/22, effective December 3, 2021) and the minimum market capitalization of £30 million (raised from £700,000 under the same 2021 reforms) were both retained unchanged in the July 2024 rules. Together they form the baseline an issuer must meet to list on the Official List.

Dual-Class Share Structures

Dual/multiple class share structures became materially more flexible. At IPO, individual founding investors, employees, and directors can hold enhanced voting rights with no mandatory maximum time period or voting ratio. Pre-IPO institutional or corporate investors (VC, PE) can also hold enhanced voting rights but for a maximum 10 years. The enhanced voting rights are exercisable on most resolutions other than specific Listing Rules matters.

Disclosure-Based Approach

The new rules institute a simpler, more flexible, disclosure-based listing regime that places primary responsibility on issuers and investors to evaluate the disclosed risks rather than imposing detailed prescriptive requirements, closer to the US model.

EU Listing Act (2024)

The EU regulatory package adopted October 8, 2024, amending the Prospectus Regulation, Market Abuse Regulation (MAR), and MiFIR, plus introducing a new directive on multiple-vote share structures. Main amendments effective December 4, 2024, with further provisions applying from March 5 and June 5, 2026. Key elements include shortened minimum IPO offer period (six to three days), new prospectus formats, page limits, MAR exemptions, and the multiple-vote share structures harmonization. The Act is part of the broader Capital Markets Union project.

Prospectus Regulation Reform

Key changes to the Prospectus Regulation include the minimum IPO offer period shortened from six to three working days (effective December 4, 2024), new prospectus formats (EU Follow-on Prospectus and EU Growth Issuance Prospectus), standardization of prospectus disclosure, and introduction of a maximum page limit for equity prospectuses. The reforms substantially reduce the documentation burden for European IPO issuers.

Market Abuse Regulation Changes

MAR amendments include changes in disclosure obligations for protracted processes and delayed disclosure of inside information, plus broader exemptions for transactions executed by persons discharging managerial responsibilities (PDMRs) during closed periods, easing compliance burdens on newly listed issuers.

Multiple-Vote Share Structures Directive

The Listing Act includes a new directive on multiple-vote share structures for companies seeking admission to trading on multilateral trading facilities (MTFs). The directive provides EU-level harmonization on dual-class structures that had previously varied substantially across member states.

Implementation Timeline

Main amendments, including the three-day offer period, entered into force December 4, 2024. After 15- and 18-month transitional periods, the two new prospectus formats applied from March 5, 2026, and the standardised format, the 300-page cap on share prospectuses, a single €12 million exemption threshold, and the MAR disclosure changes from June 5, 2026. The Level 2 rules lagged: the Commission adopted the delegated regulation setting the standardised format on May 7, 2026, but Delegated Regulation (EU) 2026/1061 was not published in the Official Journal until August 13, so ESMA recommended that issuers follow the adopted text in the interim.

Euronext launched the European Common Prospectus on April 25, 2025, a single standardized template for equity issuances designed to support deeper integration of European capital markets.

Template Mechanics

The European Common Prospectus is designed to be flexible and adaptable, meeting the regulations in force at launch while being built to absorb the Listing Act's standardised format, which applied from June 2026. It simplifies the disparate national requirements that had fragmented European IPO documentation.

Strategic Importance

The Common Prospectus is part of Euronext's strategy to compete with US and Asian venues for issuer mandates, cutting the friction of cross-border European listings in line with the Listing Act's goals.

The two reform packages differ in specific provisions but share common themes.

Post-Brexit Divergence

Post-Brexit, the UK has pursued reforms tailored to its own market without EU-wide harmonization, while the EU has continued its multi-jurisdictional Capital Markets Union project. The paths differ in detail but share one goal: making European venues competitive with US and Asian alternatives.

Issuer behaviour since 2024 shows what the rules can and cannot do: they lowered the barriers to listing in Europe, but deal volume still follows investor demand.

UK Listings Activity

UK 2025 produced 23 IPOs (9 on the Main Market plus 14 on AIM) raising £2.1 billion, up 170% on 2024, according to EY-Parthenon. The recovery was almost entirely a fourth-quarter event: 11 IPOs raised £1.9 billion between October and December, led by Fermi, Princes Group and Shawbrook, each raising roughly £400-585 million. The momentum did not carry into 2026. EY-Parthenon counts eight listings raising £606.9 million in the first nine months of 2026, most of it from a single Main Market float, and just one IPO in the third quarter, the quietest quarter since late 2023. The Middle East conflict, a sell-off in AI-exposed shares and rising rates kept issuers away, and EY says most companies considering a float are now looking to 2027.

The policy toolkit kept growing regardless. A three-year stamp duty reserve tax exemption removes the 0.5% charge on trades in companies newly listed on a UK regulated market from November 27, 2025, the LSE's overhauled AIM Rules took effect August 5, 2026, and trading in private-company shares under the FCA's PISCES regime began in March 2026, including the first event on the LSE's Private Securities Market. None of it moved the count. UK selectivity persists: mid-cap growth, life-sciences, and specialty financial issuers choose London; US-targeted technology issuers continue to prefer NYSE and Nasdaq.

European Activity

Euronext (Paris, Amsterdam, Brussels) and Frankfurt have continued to win selected mandates, and the Listing Act's remaining prospectus changes applied on schedule from June 5, 2026. The calendar did not respond. Dealogic's nine-month 2026 review puts EMEA ECM issuance at $37.2 billion in the third quarter, just over a tenth of global volume and the region's weakest quarter of the year, and ties the lag to the absence of a domestic AI industry on anything like the US or Chinese scale. Lighter prospectuses cannot create the issuers investors are paying for. Euronext's IPOready 2026 cohort, the largest pre-IPO programme in Europe with over 160 companies, remains the clearest pipeline indicator.

Cross-Listing Patterns

Some issuers continue to choose dual UK-US or EU-US listings to capture the deepest US institutional capital pool while keeping a European home market. The pattern balances US depth against European venue advantages, and nothing in the reforms removes the need for it.

The verdict on European listing reform is sharper than the early evidence suggested. The rules removed real frictions and helped at the margin, but demand depth and the macro cycle decide where European companies list, which is why many still reach for US capital through cross-border listings, the ADR, GDR, and dual-listing mechanics covered in the next article.