Check out the companies making headlines in premarket trading. Delta Air Lines — Shares advanced nearly 12% before the opening bell after the airline reinstated its 2025 profit outlook , and second-quarter revenue and net income exceeded analyst estimates. Brazilian stocks — The iShares MSCI Brazil ETF (EWZ) dropped nearly 2% premarket after President Donald Trump announced a 50% tariff on Brazilian imports into the U.S. Brazil’s president said the country would respond with similar duties of its own targeting American products. Shares of oil giant Petrobras fell more than 1%, while commercial and executive jet maker Embraer sank 6.5%. WK Kellogg — The breakfast food company gained 30% after agreeing to a buyout from Italian chocolate maker Ferrero for $23 a share in cash , valuing the Froot Loops maker at $3.1 billion. The deal was originally reported by the Wall Street Journal after the market close Wednesday. Advanced Micro Devices — The chipmaker moved nearly 2% higher following an upgrade to buy at HSBC. AMD said higher-than-expected pricing for its newest artificial-intelligence chip could add significant upside to revenue. Trex — The building materials maker rose more than 4% on light trading volume following an upgrade to outperform from neutral at Baird. The investment bank said demand for decking contractors appears set to rise year over year, which should boost Trex, which has fallen some 13% in 2025. Byrna Technologies — Shares popped 5% ahead of Byrna Technologies’ fiscal second quarter results to be released at 9 a.m. ET. Roth maintained a buy rating on the personal defense company, which produces less lethal alternatives to firearms, saying there are unlikely to be surprises in the release after Byrna in June preannounced sales that were better than expected. PTC — The software stock pulled back more than 3%. Shares climbed more than 17% on Wednesday following a report from Bloomberg that Autodesk is considering a potential takeover of PTC, citing people familiar with the matter. Autodesk is down 3% premarket after dropping 2.4% Wednesday. Helen of Troy Ltd. — The consumer products maker sank nearly 16% on disappointing second-quarter guidance. Helen of Troy, whose stock has been cut in half in 2025, forecast earnings per share in the range of 45 cents to 60 cents, excluding one-time items, while analysts polled by FactSet were looking for $1.14. Helen of Troy forecast revenue between $408 million and $432 million, versus the Street’s $470.2 million. — CNBC’s Michelle Fox, Sarah Min, Fred Imbert and Jesse Pound contributed reporting.
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