Thrasio, the U.S. start-up that raised billions of dollars and popularized the concept of e-commerce aggregation — buying up and restructuring dozens of smaller brands and third parties selling on marketplaces like Amazon in a bid for better economies of scale — has commenced a restructuring of its own. The company has filed for Chapter 11 bankruptcy protection to cut its losses on a mountain of debt. It said it has also secured an emergency $90 million in emergency financing from unnamed existi...