Check out some of the companies making the biggest moves midday: Kyndryl Holdings — The IT infrastructure services provider spun out from IBM tumbled 55% after Kyndryl disclosed in a regulatory filing that its audit committee is reviewing the company’s cash management practices. It also reported CFO David Wyshner and General Counsel Edward Sebold have left their positions , effective immediately. Kyndryl also reported third-quarter results. Nexstar Media Group , Tegna — TV and digital media provider Nexstar jumped 12% and Tegna climbed 8% after President Donald Trump in a social media post Saturday reversed his earlier position by saying he now supports their merger. Oracle — Shares advanced 9% as the enterprise software developer was upgraded to buy from neutral at DA Davidson. ” We believe that a revamped OpenAI will return to its position as Google’s top challenger and with a fresh stack of capital be able to live up to its obligations this year, including to Oracle,” DA Davidson analysts wrote in a note to clients. Cleveland-Cliffs — The steelmaker dove 19% after posting a wider-than-expected adjusted loss before interest, taxes, depreciation and amortization of $21 million. Performance was hurt by weakness in the auto and Canadian markets, but the company said it anticipated 2026 would improve as the trade challenges ease and costs fall. Workday — The software company fell more than 6% after it said CEO Carl Eschenbach will be replaced immediately by Workday co-founder Aneel Bhusri. Previously, Bhursi has had multiple stints as CEO and co-CEO of Workday. The company’s stock is down nearly 45% in the past year. STMicroelectronics — The European semiconductor maker gained almost 9% after announcing an expanded, multibillion-dollar partnership with Amazon Web Services to support infrastructure for cloud and AI data centers. Kroger — Shares jumped 6% after the grocery chain named former Walmart executive Greg Foran its next CEO. While head of Walmart’s U.S. business, Foran oversaw a turnaround at the division. AppLovin — The mobile marketing platform surged 13% after CapitalWatch issued an apology and correction for a money laundering charge made in January. AppLovin last month demanded that CapitalWatch, a short seller, retract its 35-page report. Novo Nordisk , Hims & Hers Health — Novo Nordisk advanced 3% as Hims & Hers pulled its copycat weight-loss pill off the market after Novo had threatened legal action against the telehealth firm. Hims & Hers’ stock tumbled 24%. Robinhood — The trading platform rallied 5% after an upgrade to buy from Wolfe Research. The firm pointed to Robinhood’s attractive risk-reward profile, despite a recent pullback in crypto-connected stocks. Semiconductor stocks — Stocks across the semiconductor industry fell after a South Korean media report that Samsung will begin producing next-generation high-bandwidth memory chips as soon as this month. Micron Technology shed 2%, while shares of Broadcom and Advanced Micro Devices added 3%. Valaris — Shares of the offshore drilling services company soared 28% after it agreed to be bought by Transocean for $5.8 billion. Valaris shareholders will receive 15.235 shares of Transocean stock for each Valaris share held. Transocean rose nearly 2%. Waters Corp — Shares of the lab equipment maker fell 11% after it warned that first-quarter profits would be lower than Wall Street was expecting. Waters expects first-quarter earnings in the range of $2.25 to $2.35 per share, while analysts surveyed by FactSet predicted a profit of $3.03. However, for the full-year earnings are expected to range between $14.30 and $14.50 per share, above with an average estimate of $14.29. Monday.com — Shares sank 22% and hit a 52-week low. The project management platform issued weak guidance amid concerns over artificial intelligence’s disruption of the software business model. Monday.com forecast revenue for the full year between $1.452 billion and $1.462 billion. Analysts polled by FactSet anticipated guidance of $1.48 billion. Dynatrace — The software maker’s stock jumped 7.5% after its fiscal third-quarter results outpaced estimates. Dynatrace earned 44 cents per share on an adjusted basis on revenue of $515 million. Analysts had predicted it would earn 41 cents per share with revenue of $505.8 million. Expand Energy — Shares of the natural gas company fell more than 5% after it said CEO Domenic Dell’Osso would step down and it would move its headquarters to Houston from Oklahoma City. Dell’Osso will be replaced by Chairman Michael Wichterich on an interim basis. —CNBC’s Michelle Fox, Sarah Min, Davis Giangiulio, Liz Napolitano and Christina Cheddar Berk contributed to this report