Check out the companies making headlines before the bell. Under Armor – Shares fell 5.3% on news of founder Kevin Plank's return as CEO of the athletic apparel company. Evercore ISI said Plank's return is a clear signal that UAA's strategy is not working, downgrading the stock to underperform. Robinhood – The financial services platform said Thursday that stock trading volumes in February were up 41% from a year ago, sending shares up about 12%. Dollar General – Shares of the discount retailer rose 5.8% on the back of a stronger-than-expected fourth-quarter earnings report. Dollar General reported earnings of $1.83 per share on revenue of $9.86 billion, while analysts polled by LSEG expected $1.75 per share in earnings and $9.78 billion in revenue. Shares of United States Steel fell 5.8%, deepening their decline on Wednesday, after reports that President Joe Biden plans to express “serious concern” about Japan's Nippon Steel Corp.'s proposed takeover of US Steel. Less than 19 cents a share after The Wall Street Journal reported The electric vehicle developer, which has long struggled to grow its sales, has hired restructuring advisers to help with a potential bankruptcy filing, according to individuals familiar with the matter. SentinelOne – The AI-powered cybersecurity provider lost 8% as investors viewed its $812 million to $818 million revenue outlook as weak. Analysts surveyed by LSEG expected fiscal 2025 revenue to reach $815.8 million. After the market closed on Wednesday, SentinelOne reported stronger-than-expected quarterly results. Dick's Sporting Goods – Shares rose 3.6% after the sporting goods retailer reported fourth-quarter earnings and revenue. Dick's also boosted its dividend by 10% and said it expects fiscal 2024 earnings per share to be between $12.85 and $13.25, versus estimates of $12.90 per LSEG. Citigroup – Shares rose 1% after Goldman Sachs upgraded the bank's shares to buy from neutral and raised its price target, saying Citigroup can increase its revenue and make expense cuts. MicroStrategy – Shares rose 1.6% after MicroStrategy said it raised $500 million to purchase additional bitcoin, and use it for other general corporate purposes. Shares of the company, which develops software but primarily serves as an alternative to bitcoin, rose 11% on Wednesday. – CNBC's Alex Haring, Sarah Main and Michelle Fox contributed reporting.