President Trump and U.S. tech executives are expected to gather for a major summit in Shenzhen next week. On the agenda: a stalled trade war, expanding export controls, and suspected spy games.

Mr. Huang championed start-ups, with Nvidia holding $48 billion worth of stakes in 229 private companies, including OpenAI and Anthropic, at the end of July.

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The ouster of Jensen Huang from the chipmaker he helped found is reverberating throughout Silicon Valley, Washington and beyond.

News that the chipmaker’s chief executive, Jensen Huang, resigned drove Nvidia’s stock down, though the broader market rose slightly.

The company’s board is weighing the fate of its chief executive. Silicon Valley and Washington are steeling themselves for life without him.

Elon Musk and other Silicon Valley figures cast the Nvidia chief’s relationship with a woman believed to be a Chinese spy as a personal lapse, not a security failure.

Some of the biggest investors in the artificial intelligence giant’s upcoming listing are also some of its most important business partners.