ESMA Proposes Simpler Market Abuse Disclosure Rules Under Listing Act

ESMA has opened a consultation on changes to its Market Abuse Regulation guidelines, focusing on when listed companies can delay disclosing inside information. The proposed rewrite is designed to align the guidance with the EU Listing Act and reduce administrative burden for issuers, but it also matters for traders because disclosure timing shapes how quickly price-sensitive information reaches the market.

One of the biggest changes is that, from June 2026, issuers will no longer have to disclose inside information immediately when it relates to a protracted process that is still incomplete. ESMA says that shift means some existing examples of “legitimate interests” for delay should be removed from the guidelines because the law itself is changing.

The regulator is also proposing new examples of legitimate delay, including cases where a public authority requests non-disclosure, where an issuer needs more time to gather information, or where several similar procurement processes are running at once. ESMA additionally wants to remove the old “no misleading the public” test from the guidelines because the Listing Act replaced it with a narrower rule: delayed disclosure must not contradict the issuer’s latest public statement on the same matter.

That is technical, but technical disclosure rules can still change volatility around corporate events, especially in European single stocks.

Why it matters

Traders rely on timely issuer disclosure when pricing earnings updates, deal talks and capital-markets activity. If the delay rules change, the information flow around those events can change too.

What to watch next

Watch for ESMA’s final report in Q4 2026 and for how national regulators and issuers interpret the new June 2026 regime in practice.