We find direct evidence that sovereign default risk has a negative impact on corporate performance via a rating spillover pooling mechanism. Our results show that this adverse effect is concentrated in firms that are more likely to experience limited access to external finance following a rating downgrade. Difference-in-differences tests exploiting the heterogeneity in corporate credit ratings following sovereign rating downgrades reveal that firm performance deteriorates predominantly for sovereign bound firms with higher information asymmetry, limited financial flexibility, and those operating in countries with less developed banking systems and weaker investor protection.