 Xerox Holdings Corp. shares XRX, -3.27 slid about 2 in premarket trade Tuesday, after the maker of printers and photocopiers posted weaker-than-expected revenue for the fourth quarter amid pandemic and supply chain snags. Norwalk, Connecticut-based Xerox swung to a net loss of 675 million, or 3.97 a share, for the quarter, after earnings of 77 million , or 36 cents a share, in the year-earlier period. 