(Bloomberg) -- SenseTime Group Inc.’s share price collapse after a lock-up period expired has heaped pressure on other Chinese companies that face similar situations this month.

More than 260 billion yuan ($39 billion) of restricted shares from 76 companies listed on the Star board in Shanghai -- home to China’s new-economy listings -- are scheduled to be free for sale this month, according to China International Capital Corp. The value could “hit a peak” for the year in July, analysts including Qiusuo Li wrote in a recent note. 

Lock-up expiries have been thrust into the spotlight since shares of artificial-intelligence software maker SenseTime more than halved and dropped below their IPO price immediately after restrictions on sales by cornerstone investors ended last week. 

With Chinese shares on the cusp of a new bull market after rallying from a trough earlier this year, traders are acutely sensitive to investors taking the opportunity to sell.

Shares in the Star market that are poised to be unlocked are mostly in the electronics, high-end manufacturing and health-care sectors, the CICC report said. They include shares of electronic-components manufacturer Montage Technology Co. and China Railway Signal & Communication Corp.

In Hong Kong, electric-vehicle maker XPeng Inc. will see the lock-up period on about 350 million Class B shares end on Wednesday -- about a fifth of those outstanding -- according to data compiled by Bloomberg. Those unlisted shares are all held by Chairman Xiaopeng He, coming up for sale one year on from the company’s initial public offering in the city.

China Tech Rally Sends Insiders Rushing for Exits: Tech Watch

“Experience shows that unlocking of restricted shares and stock sales by important shareholders may place short-term pressure on share prices,” according to the CICC team.

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