By Will Feuer
MKS Instruments Inc. said it was hit by a ransomware attack, which has affected production-related systems and prompted the company to suspend operations at certain facilities.
The Andover, Mass.-based company, which makes instruments and components used in various end markets, said it noticed the breach on Feb. 3. MKS said it took immediate action to contain the incidents and is investigating the impact of the event. The company said it has notified law enforcement and engaged incident-response professionals.
MKS has paused operations at certain facilities as it works to contain the incident. The company is still assessing the full scope of the costs and impacts of the incident, including whether and the extent to which the company's cybersecurity insurance will offset costs.
Shares slipped 2% to $107.00 in premarket trading.
Write to Will Feuer at Will.Feuer@wsj.com