Amazon Prime Day officially got underway Tuesday, with the summer sales event slated to last through July 11. Competitors Target and Walmart are also holding multi-day sales events.

Amazon Prime Day is officially underway. But where's the fun in letting Amazon have all the glory? Target Circle Week kicked off Sunday, bringing huge deals across groceries, clothing, toys, and more.

Independent businesses that sell goods through Amazon account for more than 60% of the company's retail sales. Some third-party sellers are expected to sit out Prime Day and not offer discounts to preserve their profit margins during the ongoing tariff uncertainty, analysts said.