Shariah approved companies (ShAC) is one of the components of the Islamic capital market in Malaysia. The objective of the first part of the book is to develop a theoretical framework for voluntary disclosure form an Islamic perspective. The objective of the empirical part of the book is to examine the extent of voluntary disclosure (i.e. overall, conventional and Islamic) in the annual reports of ShAC. In addition, is to investigate the relationship between the extent of voluntary disclosure and firm-specific characteristics. The book developed a theoretical framework based on a holistic approach which includes conventional and Islamic perspectives. The empirical results show that the extent of voluntary disclosure is low for the three categories, however it is higher for conventional than Islamic. The results also reveal that firm size is statistically associated with the extent of voluntary disclosure. Whereas, the ownership structure is significant with overall and conventional voluntary disclosure, but the type of audit firm is significant with the overall and Islamic voluntary disclosure. Moreover, the industry type is significant with the Islamic voluntary disclosure.