See the companies making the biggest moves in premarket trading: Boeing — Shares rose 4% after the planemaker reached a deal with a union representing factory workers, avoiding a potentially costly strike. MarineMax – Shares rose 6% after Citi upgraded the stock to buy from neutral. The firm highlighted the upside of the low interest rate environment and limited downside risks. Palantir Technologies, Dell Technologies — Shares of Palantir and Dell rose 8% and 5%, respectively, after Friday’s announcement that the stock would join the S&P 500 index. Palantir will replace American Airlines and Dell will replace Etsy. Merck – The pharmaceutical stock fell 2% after rival Summit Therapeutics announced phase three trial results for its lung cancer drug. Summit said its product has a “clinically significant benefit” over Merck’s Keytruda. Summit shares rose more than 30%. Arm Holdings — The chip stock rose nearly 3% after the Financial Times reported that Apple’s iPhone 16, which it will unveil on Monday, will use Arm’s artificial intelligence chip technology. United States Steel – Shares rose nearly 3% after JPMorgan upgraded the industrial stock from neutral to overweight. The firm believes the recent pullback indicates a buying opportunity on valuation support and expects the stock to pull back further if its planned sale to Nippon Steel goes through. JetBlue Airways — Shares gained 2% after Bank of America upgraded the airline’s stock to neutral from underperform and raised its price target, citing improving conditions such as lower fuel prices. The rating change also comes after JetBlue raised its third-quarter revenue estimates last week. — CNBC’s Jesse Pound, Hakyung Kim, Sarah Min and Sean Conlon contributed reporting.
