Shares of UK-based semiconductor designer Arm Holdings plunged 7.48% in after-hours trading Wednesday after the company's licensing revenue missed Wall Street estimates. Arm's fiscal third-quarter licensing revenue rose 25% from a year earlier to $505 million, but came in 2.9% below the $519.9 million expected by analysts surveyed by FactSet. "ARM is down -8% in late trading after its guidance only slightly beat – not helped by the negative read through from Qualcomm numbers after-hours given