Pinterest Investor Sues Over Tariff Impact, AI-Fueled Turnaround

Pinterest Inc. overhyped its resiliency in the face of Trump administration tariffs impacting its advertising partners, a proposed class action said.

The social platform’s stock price deflated as the scope of the ad revenue issue came to light and Pinterest announced an artificial-intelligence focused turnaround, according to the lawsuit filed Monday.

On Nov. 4, 2025, Pinterest filed a financial report for its third quarter of 2025 which included fourth quarter revenue guidance below Wall Street expectations. Pinterest’s share price plunged almost 22% to close at $25.75 on Nov. 5—the stock’s biggest one-day drop since 2022, according to data compiled by ...