Several companies posted sharp midday moves after corporate disclosures, earnings-related updates and policy news. Vicor surged 14% after forecasting sequential third-quarter revenue growth of more than 20%, compared with prior guidance of nearly 10%. On Holding jumped more than 10% after setting 2029 targets that include at least CHF5.6 billion in net sales and a 65% gross profit margin, alongside plans to repurchase up to $1 billion of Class A ordinary shares by December 2029. Lennar rose more than 4% after Berkshire Hathaway disclosed a purchase of more than 2.7 million shares. Other gainers included Grab Holdings, Capri, Shopify, Amgen, SoFi Technologies and GameStop. Quest Diagnostics and Labcorp Holdings declined after the Centers for Medicare & Medicaid Services said Medicare has paid 16% more than private payors for laboratory services and will align most payments with private-sector rates.