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

On this episode of Stock Movers:
- Constellation Energy (CEG) shares fell as much as 9.3% after it gave an full-year earnings per share guidance that missed the average analyst estimate at the midpoint, and failed to advance details on data-center deals.

- Marvell Technology (MRVL) shares jumped as much as 11% in trading on Tuesday on news that Nvidia (NVDA) is taking a $2 billion stake in it. Nvidia, which has made several billion-dollar investments in firms across the artificial intelligence supply chain in recent years, and Marvell also agreed to collaborate on the development of silicon photonics, which use light instead of traditional copper wiring to move data faster and more efficiently. And the companies will work together on ways to better leverage telecommunications networks for AI computing, according to a statement issued Tuesday.

- Unilever (ULVR) shares fall as much as 7.3% in London to the lowest level since April 2024 after the Anglo-Dutch company confirmed a $44.8 billion deal to combine its food business with spice maker McCormick. Analysts at RBC Capital Markets said they are unimpressed by the deal. McCormick shares fell as much as 10% to the lowest since November 2017.