Business Insider/Hayley Peterson
Traditional retailers such as Sears are in danger as Amazon expands into new categories.
Amazon is on a roll.The company just celebrated the biggest day in its history with the 30-hour Prime Day that ended on Tuesday. According to Amazon, the event grew 60% since last year, though the company didn't provide specific sales figures.
However, when Amazon thrives, other companies often suffer. Even the mere rumor that Amazon is entering a new sector can cause potential rivals' stocks to plummet. On Wednesday, Zillow's stock dropped 3% following whispers that Amazon is building a real estate service of its own.
Here are seven companies that the ecommerce giant threatens: