Financial crimes may happen in financial industry or use financial institutions as channels. Financial crimes affect interests of investors and have a negative impact on the order of capital markets. There may be serious and long-term consequences to a country's economic developments and its image as a whole. Internal control is the foundation of financial crime prevention. An effective internal control requires a solid comprehension and ability to comply with all regulations, rules, and policies by employees at financial institutions. This study uses DEMATEL mode to analyze employees of securities firms in their comprehension of regulatory compliance. The result of the study demonstrates that employees' comprehension level is greatly impacted by the perception of securities firms in their own obligation and responsibilities.