German chipmaker Dialog Semiconductor (DLGS.DE), which counts Apple as one of its customers, rose 1.5 percent by 0819 GMT.
Dialog makes chips that manage power consumption of consumer electronics such as smartphones and tablet computers. Apple and Samsung Electronics are among its main customers and its shares are up almost a fifth this year.
Apple smashed its quarterly forecasts, selling 74.5 million iPhones in its fiscal first quarter ended Dec. 27, compared with a forecast of fewer than 70 million. Revenue rose to $74.6 billion (49 billion pounds) from $57.6 billion a year earlier.
Profit of $18 billion was the biggest ever reported by a public company, worldwide, according to S&P analyst Howard Silverblatt.