Today's biggest winners and losers in the stock market.

On this episode of Stock Movers:

- Sezzle (SEZL) shares rallied in postmarket trading after the financial technology company raised its total revenue growth forecast for the full year.

- Whirlpool (WHR) shares tumbled as much as 20% in afterhours trading after the household appliance manufacturer cut its revenue forecast for the full year, missing the average analyst estimate.

- AMD (AMD), the leading challenger to Nvidia in AI computing chips, soared to a record in early trading after a flood of data center spending bolstered its sales forecast. Second-quarter revenue will be $11.2 billion, plus or minus $300 million, the company said in a statement Tuesday. That compares with an average analyst prediction of $10.5 billion, according to data compiled by Bloomberg. The stock soared in trading on Wednesday, rising as much as 21%.