Check out the companies making the biggest moves premarket: Airlines — Shares of Delta Air Lines , United Airlines and Southwest Airlines surged more than 4.5% on news that the U.S. strikes against key energy infrastructure in Iran would be halted. The group struggled after the war on concerns of what it would do to fuel prices and consumer spending. Cruise lines — Both Carnival and Royal Caribbean Cruises jumped more than 5% on the latest development in the U.S.-Iran war. Cruise lines have also fallen amid concerns about the economic fallout from the war, with Carnival down more than 23% as of Friday’s close and Royal Caribbean down more than 15%. Oil stocks — Energy stocks fell alongside oil prices, as the latest developments gave investors hope that the Strait of Hormuz could reopen soon. Occidental Petroleum Corporation fell more than 2.5%, EOG Resources fell more than 1.5% and Chevron slipped 1%. MongoDB — The software company rose more than 4% after an upgrade by Mizuho. While fears of artificial intelligence disrupting the software space has rippled through the group in 2026, the bank says MongoDB is unlike its peers where AI will make the company stronger, not weaker. Synopsys — Shares rose nearly 4.5% after The Wall Street Journal reported, citing people familiar with the matter, that activist Elliott Investment Management has a multibillion-dollar stake in the chips company. The report added Elliott believes there is an opportunity for the company’s financial performance to better reflect its value. Banks — A slew of banks were higher on Monday as fears over consumer spending eased after new developments in the U.S.-Iran war. Big banks Capital One and Citigroup jumped 2%. Regional banks PNC Financial Services Group and Citizens Financial Group were also up more than 2%. Travel stocks — With less worries over consumer spending, many travel-related names rose on Monday. Online travel booking sites Expedia Group and Booking Holdings rose around 2%. Hotel chain operators Hyatt Hotels and Marriott International were up more than 2%, while Hilton Worldwide Holdings was up more than 3%. Short-term rental platform Airbnb was up nearly 2%. Memory stocks — Shares of the group, which have led the market higher in 2026, were rising as the broader market rallied on Monday. Western Digital Corporation rose nearly 2%, while Seagate Technology Holdings was up 2.3%. Sandisk , the best stock in the S & P 500 in 2026, was up just under 1%.
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