Nvidia Corp. isn’t expected to announce earnings for another month, but results this week from the chipmaker’s biggest customers are about to set the tone for its shares, which are trading near an all-time high on optimism around the AI boom.

But Nvidia is still the hands-down star of the show this earnings season. Investors will be looking for signs of continued AI spending from hyperscalers like Microsoft ( MSFT ), Google ( GOOG, GOOGL ), Meta ( META ), and Amazon ( AMZN ), which make up a huge portion of AI sales, to get a sense of how well Nvidia chips are selling.