FEDERALItem 1.05 · mandatoryMalwareManufacturingManufacturingRansomwareData ExfiltratedData EncryptedMulti-Stage ChainCustomer Data InvolvedPIIIP / systemLowActive

West Pharmaceutical Services

bd_7869724e0f5d9c92 · schema v1 · pii pii-v1

Severity

Low

Discovered

May 4, 2026

Filed

May 11, 2026

To disclose

7 days

Affected

Not disclosed

Linked

2 filings

Confidence

66%

Full breach record for West Pharmaceutical Services →

West Pharmaceutical Services, Inc. disclosed a material cybersecurity incident on May 7, 2026. The company detected an intrusion on May 4, 2026, involving data exfiltration and system encryption. The company activated incident response protocols, took systems offline globally, notified law enforcement, and engaged forensic experts. Core enterprise systems have been restored, though full restoration is ongoing. The investigation into the scope of affected data is active.

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SEC clockMateriality determined May 7, 2026 → Filed May 11, 20264d ✓ SEC 4-day OK7 days discovery → filing

⚠ occurrence dateThe stored discovery date equals the breach OCCURRENCE date. Detection is normally later, so this OVERSTATES the delay — a 'late' verdict here may not be real.

Incident timeline

discovery → filing · 7 days

May 4, 2026

Begins

May 4, 2026

Discovered

May 7, 2026

Scope determined

May 11, 2026

Filed

This filing is one of 2 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

SEC 8-Kbd_6cf422be95e67c2f2026-05-20 · +9dVerified

Name: West Pharmaceutical Services
norm: west pharmaceutical
SEC CIK: 0000105770
Domain: westpharma.com

Name: West Pharmaceutical Services
norm: west pharmaceutical
SEC CIK: 0000105770
Domain: westpharma.com
Industry: Manufacturingllm

Discovered: May 4, 2026
Breach occurred: May 4, 2026
Undetected for: 0 daysoccurrence → discovery
Materiality determined: May 7, 2026
Notification sent: May 11, 2026
Affected individuals: Not disclosed
Data types: PIIIP / system
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: notifying law enforcement

During the incident: Activated its incident response protocols
Proactively taking systems offline globally for containment purposes
Notifying law enforcement
Engaging external cyber-forensic experts
Changes made: Restored its core enterprise systems
Critical processes for shipping, receiving, and manufacturing have restarted at some sites
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 7 days(7 days from discovery to filing)
Compliance flags: SEC 4-day OK · 4d
Discovery-date grounding: occurrence dateThe stored discovery date equals the breach OCCURRENCE date. Detection is normally later, so this OVERSTATES the delay — a 'late' verdict here may not be real.
Clock breakdown: Statute Window Elapsed Threshold Status
SEC
Materiality determined: May 7, 2026
→ Filed: May 11, 2026
4d cal. 4 business days SEC 4-day OK

Statute	Window	Elapsed	Threshold	Status
SEC	Materiality determined: May 7, 2026 → Filed: May 11, 2026	4d cal.	4 business days	SEC 4-day OK

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings

View merged incident ↗

SEC 8-KMay 11 · first · this page

SEC 8-K+9d

Pattern: first filing May 11, last May 20 — a 9-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filing

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statementThis record

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://www.sec.gov/Archives/edgar/data/105770/000010577026000068/wst-20260507.htm
DisclosureLens renders the full SEC/HHS filing inline below from the originating regulator’s public record (§4.5 fair report privilege).
Filed at: May 11, 2026
Raw hash: e6b0ec3e9cfe99b7866e9fc3270670d8a2980955733d7330a534fda55c5a095a

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Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityWest Pharmaceutical Services

Victim entityWest Pharmaceutical Services

Incidentdiscovered May 4, 2026

Stated responseActivated its incident response protocols

ComplianceSEC 4-day OK

Extraction provenanceno artifact recorded

Source provenancewww.sec.gov

Source filing