We study whether Section 404 of the Sarbanes-Oxley Act of 2002 made cross-listed firms less opaque via an examination of analyst earnings forecasts. To test this, we compare European Union (EU) firms that are cross-listed in the US—and therefore subject to S404—with comparable EU firms that are not cross listed. We find that while both types of firms experienced a decrease in opaqueness over time, this decrease was significantly larger for cross-listed firms. Our results are robust to accounting for concurrent sell-side analyst regulations in the US, delistings, and changes in corporate risk taking. Overall, our analysis suggests that SOX had a positive effect on corporate disclosure quality.