Nexperia’s Chinese parent, Wingtech Technology, faces delisting from the Shanghai Stock Exchange due to an audit failure, amid a row over control of the Dutch chipmaker.

Wingtech said in an exchange filing that its auditor has issued a “disclaimer of opinion” due to restrictions in verifying the financial records of Nexperia’s operations outside China, triggering the delisting risk.

The Dutch government seized control of Nexperia last September over concerns around Wingtech’s management of the firm, which makes mature-grade chips that are widely used in the automotive and other sectors.

Since then, Nexperia and the company’s operation in China have broken off relations with one another, with the China unit in March accusing the Dutch headquarters of “mass disabling” the office accounts of staff based in China.

In its filing, Wingtech said it was working to restore its internal management system and gain full access to Nexperia data to resolve the audit issues.

Nexperia said in a statement that it had provided “all necessary support” to Wingtech’s auditors and that its efforts had been “positively acknowledged”, adding that it had no intention of harming the interests of Wingtech’s shareholders.

As of 6 May, restrictions are to be placed on Wingtech’s stock so that trading will halt if its shares fluctuate more than 5 percent, Wingtech’s filing said.

If the issues are not resolved by the end of this year, Wingtech could be forced to delist.

The company’s stocks and convertible bonds were suspended from trading for one day on 30 April.

Nexperia China has been building a domestic supply of wafers within China, while the Dutch headquarters has been building its own supply chain in which China does not participate.

Wingtech’s first-quarter revenue plunged 94 percent year-on-year to 816 million yuan (£88m) after Nexperia’s overseas business was no longer consolidated in the results.