West Pharmaceutical Says Recent Cybersecurity Attack Temporarily Disrupted Operations

Dow Jones05-12

By Freddy Sebastian

West Pharmaceutical Services said some data were exfiltrated by an unauthorized party and certain systems were encrypted in what the company called a material cybersecurity attack.

The incident and the company's proactive response temporarily disrupted business operations globally, it said Monday.

Shares ticked down 2.3% to $315 in late trading.

While West Pharmaceutical said it has restored its core enterprise systems, and critical processes for shipping, receiving, and manufacturing have restarted at some sites with restoration of the remaining sites in process, the timeline for a complete restoration hasn't been finalized, it added.

West Pharmaceutical said after initially detecting an intrusion on May 4, it promptly activated its incident response protocols, including proactively taking systems offline globally for containment purposes, notifying law enforcement and engaging external cyber-forensic experts.

An investigation into the nature and scope of the incident remains ongoing, including the extent of the data affected, the company said.

West Pharmaceutical said it has taken steps to mitigate the risk of dissemination of the exfiltrated data.

It hasn't yet determined the incident's material impact, if any, on its financial condition and results of operations.

Write to Freddy Sebastian at freddy.sebastian@wsj.com

(END) Dow Jones Newswires

May 11, 2026 17:41 ET (21:41 GMT)

Copyright (c) 2026 Dow Jones & Company, Inc.

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were exfiltrated by an unauthorized party and certain systems were encrypted in what the company called a material cybersecurity attack. \n\n\n  The incident and the company's proactive response temporarily disrupted business operations globally, it said Monday. \n\n\n  Shares ticked down 2.3% to $315 in late trading. \n\n\n  While West Pharmaceutical said it has restored its core enterprise systems, and critical processes for shipping, receiving, and manufacturing have restarted at some sites with restoration of the remaining sites in process, the timeline for a complete restoration hasn't been finalized, it added. \n\n\n  West Pharmaceutical said after initially detecting an intrusion on May 4, it promptly activated its incident response protocols, including proactively taking systems offline globally for containment purposes, notifying law enforcement and engaging external cyber-forensic experts. \n\n\n  An investigation into the nature and scope of the incident remains ongoing, 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