The research aims to examine the effect of financing types on sustainability reporting with financial performance as a mediating variable. The independent variables in this research are Murabahah Musyarakah, and Mudharabah, while the mediating variable in this research is financial performance measured using Capital Adequacy Ratio (CAR) as a proxy. The Population of this research is Islamic Banking listed in statistical of Otoritas Jasa Keuangan Indonesia and published sustainability reporting and annual reports for the 2014-2017 period. The result of this study concluded that Financing Type proxied with Murabahah financing affects financial performance (CAR), and financial performance (CAR) also affects the Sustainability Reporting. The other proxies of financing type (Musyarakah and Mudharabah) do not affect financial performance. This study also concluded that financial performance variable mediates the effect of Financing type (Murabahah) on Sustainability Reporting.

This research aims to analyze the effects of capital structure and organizational slack on sustainability reporting in Islamic banks of Indonesia, Qatar, and Bahrain. The capital structure variable consists of leverage and investment account holders, while the organizational slack variable consists of available slack and recoverable slack. Analysis content that used to measure the disclosure of sustainability reporting based on the AAOFII index consisting of 78 items. The observation data used were 120 observations consisting of 26 Islamic banks on Indonesia, Qatar, and Bahrain for the period 2014 to 2018 with a purposive sampling method. The results showed that there was a positive influence between leverage and a negative effect between investment account holders on sustainability reporting. This study also found a positive relationship between available slack and there was no significant effect between recoverable slack on sustainability reporting.

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