Shares of Chinese tech giants fell in Hong Kong on Monday, after Beijing fined some of the country’s largest internet companies for failing to make proper antitrust declarations on previous deals.

Alibaba Group Holding Ltd. HK:9988, Tencent Holdings Ltd. HK:700 and Ping An Healthcare & Technology Co. HK:1833, which were named in the latest executive punishment notices, respectively fell 6.4%, 2.7% and 4.0%. Among peers, JD.com Inc. HK:9618 was down 4.7% and Meituan HK:3690 shed 5.5%.

The…