Jurisdiction(s):
United Kingdom

Key definition

AIM Rules definition

What does AIM Rules mean? The rulebook setting the admission requirements and ongoing compliance obligations for companies whose securities trade on aim, the london stock exchange’s growth market. In practice, “AIM rules” is a descriptive term used by practitioners to refer primarily to the AIM Rules for Companies (and, where relevant, the separate AIM Rules for Nominated Advisers). It is not a statutory definition. Key features include: the need to appoint and retain a nominated adviser (Nomad); admission and disclosure standards (including the admission document and website disclosures); continuing obligations on financial reporting and inside information; and transaction controls for substantial transactions, related...

AIM Rules 17–19 for Companies: UK disclosure, half-yearly reporting and annual accounts—DTR 5 overlap, MAR, COVID-19 measures, Brexit accounting changes and LSE guidance

Published by a LexisNexis Corporate expert

Practice notes

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This Resource Note

This Resource Note summarises the key provisions in rules 17, 18 and 19 of the aim rules for Companies (AIM Rules). These rules address disclosure of miscellaneous information and the publication of half-yearly reports and annual accounts by an aim company. It also signposts relevant materials, commentary and guidance from the London Stock Exchange (LSE), alongside Lexis+® UK analysis and resources, to deliver practical guidance on interpreting and applying Rules 17, 18 and 19 of the AIM Rules...

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Web page updated on 28/05/2026

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