We examine the joint effects of litigation risk and regulation in shaping firms’ financial reporting decisions. Specifically, we investigate how these disciplining mechanisms influence firms’ disclosure of non-GAAP earnings metrics, which have been at the forefront of the SEC's regulatory concerns in recent years. We employ a plausibly exogenous shock to litigation risk based on a US circuit court ruling to explore how litigation risk influences firms’ non-GAAP earnings disclosures. We find a robust negative relation between litigation risk and both the likelihood and aggressiveness of non-GAAP reporting. However, we find a significant attenuation in the sensitivity of non-GAAP disclosure to litigation risk after the implementation of Regulation G (Reg G), despite evidence that aggressive non-GAAP reporting persists in the post-Reg G environment. Additional analyses indicate that this attenuation is actually the net result of two unique effects. First, we find that Reg G created a de facto “safe harbor” for non-GAAP reporting among firms in circuits with higher litigation risk and a “curtailment effect” among firms in the circuit with the lowest litigation risk. Overall, Reg G led to a convergence in non-GAAP reporting practices irrespective of firms’ circuit-specific litigation risk. We posit that this net attenuation of litigation risk's influence on non-GAAP reporting is likely an unintended consequence of Reg G.