Stocks making the biggest moves premarket: American Airlines, Diageo, Palantir & more

Check out the companies making headlines before the bell : MP Materials — The rare earth mine operator rose 3% after a Deutsche Bank upgrade to buy from hold. The bank highlighted MP as a buying opportunity for investors looking for exposure to rare earths. Palantir — Shares of the defense technology stock popped 3%. The stock tumbled more than 11% amid the selloff in artificial intelligence-focused names last week. American Airlines , United Airlines and Delta Air Lines — These three airline stocks all rose about 2% in premarket trading on hopes that the U.S. government shutdown could be ending soon. The Senate passed the first stage of a deal that would end the impasse, which began on Oct. 1. Hundreds of flights have been canceled due to the disruptions. Metsera — The obesity drug developer tumbled 15% after Pfizer won a bidding war to acquire the company, beating out rival Novo Nordisk. Pfizer agreed to pay $86.25 per share for Metsera, a premium of nearly 4% to Friday’s close. Rumble — The video-sharing platform’s shares surged more than 17% after the firm secured a $100 million advertising commitment from Tether while announcing a deal to buy German AI firm Northern Data for about $767 million. Viasat — The communications company reported a narrower loss in the latest quarter with strength seen in communication services segment, prompting the stock stock pop 12%. Raymond James also upgraded the shares following the results. Diageo — The spirits giant announced it’s bringing in former Tesco chief Dave Lewis as new CEO to revive growth. The news triggered the stock to rally nearly 8%. Lewis, who will join Diageo in 2026, is best known for cost-cutting and innovative marketing. — CNBC’s Alex Harring, Fred Imbert and Michelle Fox contributed reporting.