Islamic insurance is an Islamic financial service that guarantees a participant's life, health, education, asset, and business. Some of them experienced a decline in their financial stability. This study aims to analyze the determinants of financial stability of Islamic insurance companies registered at the Indonesian Financial Services Authority (Otoritas Jasa Keuangan - OJK) from 2014 to 2018. Thirty-eight data observations were acquired from eight full-fledged Islamic insurance businesses' financial reporting and analyzed using panel data regression. The dependent variable is financial stability, whilst investment, capital structure, insurance premiums, independent board of commissioners, sharia supervisory board, board of directors, and institutional ownership are the independent variables. The results show that financial stability is significantly affected by investment, insurance premiums, independent boards, and institutional ownership. The capital structure, sharia supervisory board, and board of directors do not affect the financial stability. Increasing the number of participant contributions and strategic investments should be a concern of Islamic insurance managers. The role of an independent board and Institutional owners supervisory could strengthen the financial stability of Islamic Insurance. Research on Financial stability is supporting the development of Islamic insurance companies