 Shares of Xerox Holdings Corp. XRX, -0.93 sank 6.5 in premarket trading Tuesday, after the copier and other workplace hardware company reported third-quarter profit that was less than half what was expected, citing persistently high inflation and supply chain constraints, and lowered its full-year outlook. The company swung to a net loss of 383 million, or 2.48 a share, from net income of 90 million, or 48 cents a share, in the year-ago period. 