Qualcomm shares fell 1.8 percent to $63.05 in after-market trading on Wednesday. The move comes after hedge fund Jana Partners called for Qualcomm to spin off its chip business from its highly profitable patent-licensing income, among other changes the activist asked for. “We decided we were going to take a fresh look at the corporate structure of the company,” Qualcomm president Derek Aberle said in an interview, adding that the chipmaker has reviewed its options twice already in the past decade.