What discloses insider information requirements for AIM listed companies?

AIM listed companies are subject to specific regulations regarding the handling and disclosure of insider information. The correct choice highlights that these companies must maintain insider lists in accordance with the Market Abuse Regulation (MAR). This regulatory requirement is crucial because it ensures that companies have a systematic way of documenting individuals who have access to insider information, which can help in preventing market abuse.

The regulations require that these lists be regularly updated and that they include details such as the identity of the insider, the date they gained access to the information, and the nature of the information. Such measures are designed to enhance transparency and maintain market integrity, as they allow regulators to monitor who has access to critical, non-public information.

In contrast, the other options do not directly relate to the disclosure of insider information. Maintaining an advisory board, for example, may serve to provide guidance and support to the company but does not have any regulatory implications for insider information. Publishing earnings reports quarterly and submitting financial forecasts annually are important corporate governance practices but are separate from the specific requirements regarding insider lists mandated by MAR. These practices focus on broader financial transparency rather than the specialized handling of insider information.