We provide evidence that some profitable insider stock selling is motivated by public information. At firms that disclose having concentrated sales relationships, insiders appear to sell their own stock profitably based on public information about their principal customers. Supplier insiders...

We explore similarities in insider trading as a proxy for information flows. We observe that corporate insiders cluster trades around those of other insiders at their firm, especially around trades of insiders with whom they work closely. Clustering is greater when informational advantages are...

We explore insider trading at multinational firms and find multinational firm insiders make larger trades followed by larger abnormal returns relative to those at domestic firms. Multinational firm insider trading profits are concentrated among top-level insiders (CEO, President and Chairman),...