French software maker Dassault Systèmes plunges 21%, on track for worst day ever

By 8:50 a.m. in London, the Paris-listed shares were 21% lower, after trading of the stock was briefly suspended at the open.

It came after the company published its fourth-quarter earnings on Wednesday morning, which showed adjusted revenues from software dropped 5% in the final three months of last year.

For the full year, total revenue was flat at a weaker-than-expected 6.24 billion euros ($7.43 billion), and software revenue also showed little growth at 5.64 billion euros.

Analysts had been expecting total revenues to hit 6.3 billion euros, according to LSEG data.

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