Stocks making biggest moves midday: UNH, AMAT, SNDK, CSCO, EVLV, FLO

Check out some of the companies making the biggest moves midday: UnitedHealth — The health insurer rallied 14% after Warren Buffett's Berkshire Hathaway revealed a stake of five million shares, worth about $1.6 billion. The "Big Short" investor Michael Burry and Appaloosa Management's David Tepper also disclosed sizable stakes in the company. If the UNH gains hold through the end of the session, it will mark the stock's best day since 2008. Applied Materials — The semiconductor equipment manufacturer plunged 13% after the company's current-quarter outlook trailed estimates from analysts polled by LSEG. Applied Materials' fiscal third-quarter earnings and revenue topped Wall Street expectations. Intel — Intel climbed more than 3% in early trading Friday, adding to Thursday's 7% gain. The ch