Beijing pressed ahead with moves to assert greater control over technology companies, continuing a campaign that’s roiled financial markets from New York to Shanghai.

       In a flurry of action Friday, authorities summoned the country’s largest technology companies for a warning on data security, vowed tighter oversight of overseas share listings and accused ride-hailing companies of anti-competitive behavior. The Ministry of Industry Information Technology on Friday told 25 of China’s largest internet and hardware companies, including Alibaba Group Holding Ltd. and Tencent Holdings Ltd., to carry out internal reviews and rectify issues ranging from data security to consumer-rights protections.

       Ride-hailing firms under scrutiny

       In a separate statement, China’s transport ministry said authorities will step up oversight of ride-hailing and on-demand trucking companies, adding that some firms are operating irregularly and disrupting fair competition.

       Risk disclosures prompt US to freeze Chinese IPOs

       The crackdown by Beijing has prompted action from US stock regulators, according to Reuters. The Securities and Exchange Commission has stopped processing registrations of US IPOs and other sales of securities by Chinese companies, the news agency reported, citing people familiar with the matter.