The economic decision makings require information generally resulting from accounting system. In fact, the final goal of decisions made by users of financial reports is the optimal allotment of economic resources to profitable activities so that it is provided an economic growth and prosperity. Financial reporting reveals the allotment of capital resources in a trade company and its profitability capacity. It is clear that the disclosure principle, as one of the accounting principles, expresses all important and relevant facts concerned with events and activities of trade unit. Without pressures from outside the organization and legal and professional requirements, however, the trade units don’t tend to reveal financial data adequately. Unwillingness to sufficient disclosure is likely to relate to the characteristics of companies and main issue of this research is the study of the effects of non-financial characteristics on the disclosure extent. Studied non-financial characteristics include: 1. The number of shareholders, 2. Acceptance record in stock exchange, 3. The kind of industry that company has activity in (manufacturing or service), 4. The kind of auditing institution, and 5. Directorate’s composition. Keywords: disclosure, non-financial characteristics, number of shareholders, acceptance record in stock exchange, kind of industry, kind of auditing institute, directorate’s composition.

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