This research aims to explore the implications of beneficiary ownership in financial services sector conglomerates in Indonesia on financial system stability. Because financial services sector conglomerates can obscure the true beneficiaries within the conglomerate in Indonesia. This can pose risks to the financial system. If one financial institution within the conglomerate fails, it can have cascading effects on other institutions within the conglomerate. This can lead to systemic crises, which can harm the overall economy. Therefore, the problem lies in how to uncover the true beneficiaries within a financial services sector conglomerate in Indonesia. This is a normative legal research, prescriptive in nature, employing a legislative and legal comparison approach. Secondary data used includes legislation such as the Limited Liability Company Law, Banking Law, Financial Sector Development and Strengthening Law, as well as the Financial Services Authority Regulation on Financial Conglomerates. Additionally, international journals and legal dictionaries are used as references, supported by empirical data in the form of interviews with the Financial Services Authority. Data is analyzed qualitatively, with conclusions drawn using deductive-inductive reasoning. An individual or legal entity as a primary entity that can control changes in the Articles of Association, Share Ownership Structure, replacement of directors, board of commissioners, control the company's finances, but the individual/legal entity is not listed in the company's articles, then can be categorized as a beneficial owner of a limited liability company. Similarly, in a financial services sector conglomerate existing in Indonesia, it can be proven by finding out who controls the conglomerate.