Alibaba, Baidu, and Tencent were among a dozen companies being examined for inclusion in a Defense Department list of firms deemed to support Chinas military, intelligence and security services.
In the wake of the riot at the Capitol, companies moved to cut ties with President Trump and his supporters and fired workers who participated.
Online stores run by the Trump Organization and Trump campaign were taken offline on Thursday by the e-commerce software provider, which said President Trump violated company policy against promoting violence.
The legal action followed a monthslong investigation by attorneys general in Colorado and other states into whether the tech giant abuses the market power of its dominant search business.
Unlike Standard Oil and U.S. Steel, its market share is beneficial to sellers and customers.
A federal judge temporarily blocked the Trump administrations executive order curbing Americans use of WeChat, agreeing with free-speech arguments raised by users of the popular Chinese-owned messaging and e-commerce app.