Abstract. The worth of a company's assets is an important measure of its success. The health of a business is reflected in its stock price. The ownership structure, including management ownership and institutional ownership, is one of the variables that affects the value of a corporation. This research aims to shed light on the relationship between institutional ownership and firm value, as well as the relationship between managerial ownership and firm value, in manufacturing businesses operating in the coal sub-sector that are listed on the Indonesia Stock Exchange (IDX) from 2021 to 2023. Price book value (PBV) is a measure of a firm's worth, while the proportion of shares owned by institutional and management owners is a measure of their ownership. A quantitative methodology was used in this study's verification process. Seventeen businesses fulfilled the requirements during three time periods, for a total of fifty-one observations, as a result of the purposive sampling method. The data was derived from secondary sources and documentation approaches. Specifically, annual reports covering the period of 2021–2023, which were obtained either directly from the websites of the companies involved or via the Indonesia Stock Exchange. In the meantime, panel data multiple linear regression analysis was used as the data analysis approach. In order to analyze the data, the statistical program Eviews 12 SV Lite was utilized. Both institutional and managerial ownership styles had little effect on firm value, according to the study's findings. Abstrak. Nilai aset perusahaan merupakan ukuran penting keberhasilannya. Kesehatan bisnis tercermin dalam harga sahamnya. Struktur kepemilikan, termasuk kepemilikan manajemen dan kepemilikan institusional, merupakan salah satu variabel yang memengaruhi nilai perusahaan. Penelitian ini bertujuan untuk menjelaskan hubungan antara kepemilikan institusional dan nilai perusahaan, serta hubungan antara kepemilikan manajerial dan nilai perusahaan, dalam bisnis manufaktur yang beroperasi di sub-sektor batubara yang terdaftar di Bursa Efek Indonesia (BEI) dari tahun 2021 hingga 2023. Nilai buku harga (PBV) adalah ukuran nilai perusahaan, sedangkan proporsi saham yang dimiliki oleh pemilik institusional dan manajemen adalah ukuran kepemilikan mereka. Metodologi kuantitatif digunakan dalam proses verifikasi penelitian ini. Tujuh belas perusahaan memenuhi persyaratan selama tiga periode waktu, dengan total lima puluh satu observasi, sebagai hasil dari metode pengambilan sampel bertujuan. Data diperoleh dari sumber sekunder dan pendekatan dokumentasi. Secara spesifik, laporan tahunan yang mencakup periode 2021–2023, yang diperoleh langsung dari situs web perusahaan yang terlibat atau melalui Bursa Efek Indonesia. Sementara itu, analisis regresi linier berganda data panel digunakan sebagai pendekatan analisis data. Untuk menganalisis data, menggunakan program software statistik Eviews 12 SV Lite. Menurut temuan studi, baik gaya kepemilikan institusional maupun manajerial memiliki pengaruh yang kecil terhadap nilai perusahaan.