Steve Mollenkopf, CEO of Qualcomm.

Check out the companies making headlines midday Monday:

Qualcomm, Xilinx, BroadcomChipmakers were under pressure led by declines in Qualcomm and Xilinx, which tumbled 6% and 3.6%, respectively. Broadcom also dropped 6%. The drop came after the U.S. blacklisted Huawei and effectively halted its ability to buy American-made parts and components. This led Google to suspended business activity with the Chinese telecom giant. Other Huawei suppliers, including Qualcomm, Broadcom, Intel and Xilinx, will reportedly stop selling to the Huawei until further notice. U.S. chip suppliers are losing a big customer as Huawei purchases $20 billion of semiconductors each year.