Check out the companies making headlines before the market opens. Humana – Shares plunged more than 22% after the health care company announced dire preliminary Medicare Advantage data for 2025. plan, down from 94% in 2024. Nike's first-quarter profit exceeded expectations, but revenue fell short of expectations. Nike also postponed its investor day as a new chief executive prepares to take office. CHINA STOCKS — Shares of Chinese companies continue to rise on the back of broader stimulus measures. E-commerce company JD.com and electric vehicle maker Li Auto each rose more than 9%, while technology company Baidu and Temu parent Pinduoduo gained more than 6%. Fellow e-commerce company Alibaba also gained more than 4%. Lamb Weston – Shares of Lamb Weston fell 5% after the French French fry maker warned in its fiscal first quarter that demand for restaurant and frozen products looked weak. Lamb Weston's adjusted earnings for the period did come in slightly above expectations, at 73 cents per share. Analysts polled by LSEG expected earnings of 72 cents per share. Diamondback Energy – The oil stock rose 3% after Barclays upgraded the stock to overweight from equal weight. Analyst Betty Jiang said Diamondback has one of the “clearest paths to positive events” and endorsed the company's $26 billion merger deal with Endeavor Energy Resources. LPL Financial – Shares of LPL Financial fell 3.4% after the company fired CEO Dan Arnold for allegedly violating its “commitment to a respectful workplace.” The company said Chief Growth Officer Rich Steinmeier will take over as interim CEO. Harley-Davidson – Shares of the motorcycle maker fell 4% after Baird downgraded the stock to neutral from buy. The company cited risks to its third-quarter guidance, including a weak retail outlook and excess inventory. ENERGY STOCKS – Shares of energy companies rose after Iran launched a missile attack on Israel. APA Corp and Marathon Oil both rose more than 2%, while Occidental Petroleum rose more than 1%. —CNBC’s Lisa Kailai Han, Jesse Pound, Sarah Min and Michelle Fox Theobald contributed reporting.