Bristol Myers Squibb reported a data breach to the Montana Attorney General. The breach was reported on 2023-06-29. The breach occurred from 5/27/2023 to 6/1/2023. 1 Montana residents were affected.
Clustered 3 filings across 3 jurisdictions · filing window Jun 29, 2023 → Jul 3, 2023. View entity profile → Other incidents for this victim →
incident inc_fa595a11d81b40d4 · merge_method deterministic · confidence 100%
Discovered → first regulatory filing
Range of discovered_at dates across filings
MT NH WA
Time between earliest and latest filing
Not recorded for this incident
Leak precedence · Materiality delta · SEC filing delay — no leak-site claim in this cluster; no SEC 8-K in this cluster.
all State AG
per-filing reported counts
State AGs report only their own residents; bars show per-filing counts.
Earliest sighting first · deep chronology in Litigation Timeline
May 27, 2023
When the intrusion reportedly occurred, per the linked filings
May 31, 2023
Reported by WASHINGTON AG, NEW HAMPSHIRE AG filings
Bristol Myers Squibb reported a data breach to the Montana Attorney General. The breach was reported on 2023-06-29. The breach occurred from 5/27/2023 to 6/1/2023. 1 Montana residents were affected.
About this clustering
DisclosureLens links filings into incidents through layered matchers: deterministic rules (same source document, multistate filings of one breach, tight-window same-victim pairs), a weighted-similarity scorer for cross-source candidates, and an operator review queue for everything uncertain. Each link records its own method and confidence — shown per filing in the timeline below. The system defaults to NOT merging when uncertain, because a false merge (collapsing two unrelated breaches) is more harmful than a false split (showing related filings separately); uncertain pairs route to human review instead of auto-merging. Filing summaries shown in the timeline are AI-generated extracts — verify each against its linked source.
Affected (this filing): 1
Bristol Myers Squibb, a health sector entity reported a malware incident to the Washington Attorney General. The organization became aware of the incident on 2023-05-31 and filed notice on 2023-06-30. 2,231 Washington residents were affected. 30 days elapsed between awareness and notification. 4 days to identify the breach.
Affected (this filing): 2,231
Bristol Myers Squibb notified New Hampshire AG of a MOVEit vulnerability exploitation. Unauthorized access occurred as early as May 27, 2023. Data of 5 NH residents, including SSNs and names, was exfiltrated. BMS engaged law enforcement, patched the vulnerability, and offered 24 months of credit monitoring.
Affected (this filing): 5