The logo of semiconductor design firm Arm on a chip.Shares of British chip designer Arm fell 8.22% in premarket trading on Thursday, as disappointing revenue guidance clouded a positive sales quarter driven by demand for artificial intelligence applications.Arm reported fourth-quarter revenue of $928 million Wednesday, marking a 47% year-over-year rise.Performance was driven by Arm's licensing business, which grew 60% to $414 million in the quarter. The firm cited "multiple high-value license agreements bei ...