Check out the companies making headlines in midday trading: Spirit Airlines — Trading in shares of the discount airline was halted on Monday after Spirit filed for bankruptcy . Trump Media & Technology Group — Shares in President-elect Donald Trump’s media company pulled back roughly 5%. Although the stock has been increasingly volatile in the wake of Trump’s election, it has gained more than 52% in 2024. Liberty Energy , Oklo — Stock in Liberty Energy gained about 5% after President-elect Donald Trump selected CEO Chris Wright as his incoming energy secretary . Shares of nuclear company Oklo, where Wright is a board member, advanced more than 20%. Roku — Shares climbed about 4% on the back of Baird’s upgrade to outperform from neutral. After a sizable drop to the streaming stock’s share price this year, Baird said investors are now “overlooking” long-term potential and changes in the business backdrop. Redfin — The online real estate company’s stock slipped 3.4% following a downgrade at Goldman Sachs to sell from neutral. The bank cited rising competition for the call. CVS Health — Shares of the drugstore operator jumped nearly 6% following a decision to add four new board members in a deal with Glenview Capital. Separately, Wells Fargo upgraded the stock to overweight from equal weight. The firm believes downside to aggressive growth initiatives at Aetna, the company’s health insurance segment, have peaked. Robinhood — Shares of the financial services platform jumped more than 8%, hitting a new 52-week high, after Needham upgraded the stock to buy from hold . The firm believes changes at the U.S. Securities and Exchange Commission under Trump’s new administration will lead to more product launches from the company. On Monday, Piper Sandler also became more bullish on the name, with its updated price target reflecting more than 11% upside from Friday’s close. Super Micro Computer — Shares of the chipmaker surged more than 17% following a Barron’s report that Super Micro is expected to file a plan for its annual report by Monday as to avoid having its listing removed from the Nasdaq . Moderna — Shares of the biotech company jumped more than 5% after HSBC upgraded the stock to buy from hold and said it views the stock as being undervalued. The firm said Moderna’s “pipeline deserves more than the market is giving it credit for,” noting that an upcoming stock catalyst is an interim analysis expected by the end of this year for the company’s cytomegalovirus, or CMV, vaccine phase 3 study. Warner Bros. Discovery — Stock in the media conglomerate added nearly 3% after the company reached a settlement with the National Basketball Association over allegations of breach of contract, per a Wall Street Journal report. — CNBC’s Alex Harring, Sean Conlon, Hakyung Kim, Pia Singh and Michelle Fox contributed reporting.