China Seeks Sensitive Data From US Firms in Semiconductor Probe

China is demanding some US semiconductor firms submit sensitive information about their sales in the world’s largest chips market as part of its probe of American suppliers.

On Wednesday, China’s Trade Remedy and Investigation Bureau under the Ministry of Commerce published questionnaires designed to gather intelligence for an anti-dumping investigation on certain American-made analog IC chips, the sort of products sold by Texas Instruments Inc. and Analog Devices Inc.The bureau seeks data on sales activities in China, including a comparison of the costs and profits for the investigated chips in their home country and the Asian nation.

While Chinese ...