S Share acquisitions are corporate actions that must be reported to the business competition supervisory commission (kppu) as regulated under law number 5 of 1999. delays in fulfilling this reporting obligation may result in administrative sanctions in the form of fines. however, in practice, the kppu often grants reductions in administrative fines based on certain considerations. this study aims to analyze the legal consequences of delayed reporting of share acquisitions and to assess the appropriateness of the reasons used by the kppu in granting reductions of administrative fines in kppu decisions issued between 2022 and 2024. the research employs a normative legal research method using a statutory approach and a case approach. the findings show that delayed reporting results in administrative sanctions in accordance with competition law provisions. nevertheless, the kppu’s decisions to reduce fines are based on specific considerations, such as the cooperative attitude of the business actors, which in practice has led to differences in the amount of fines imposed across decisions. this situation has the potential to create legal uncertainty, highlighting the need for greater consistency in the determination of administrative sanctions.