This document discusses the business case for companies and investors to engage on anti-bribery and corruption issues. It outlines that corruption costs an estimated $2.6 trillion annually, or over 5% of global GDP. Corruption scandals can result in huge financial losses and reputational damage for companies. Regulatory enforcement is also increasing across jurisdictions, with the US and UK aggressively prosecuting companies. Deferred prosecution and non-prosecution agreements now require companies to pay large fines, admit wrongdoing, and implement compliance measures. As such, engagement helps companies strengthen anti-corruption controls to mitigate risks and supports investors' fiduciary duty to protect shareholder value.