Clustered 8 filings across 7 jurisdictions · filing window Aug 14, 2023 → Aug 18, 2023. View entity profile → Other incidents for this victim →
incident inc_39461b0994a0482c · merge_method deterministic · confidence 100%
Discovered → first regulatory filing
Range of discovered_at dates across filings
⚠ one filing cites 1,000,000 nationwide
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.
Identity (basic) · Government ID
CA ID ME MT NH OR WA
all State AG
per-filing reported counts · nationwide total 1,000,000
State AGs report only their own residents; bars show per-filing counts. A linked filing cites a larger nationwide total than the incident's deduplicated headline count.
Earliest sighting first · deep chronology in Litigation Timeline
8 filings across 7 jurisdictions · Aug 14, 2023 – Aug 18, 2023 · 3 milestones
May 29, 2023
When the intrusion reportedly occurred, per the linked filings
May 31, 2023
Reported by WASHINGTON AG, IDAHO AG, NEW HAMPSHIRE AG filings
Jul 21, 2023
Reported by MAINE AG, OREGON AG filings
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.
Milliman, Inc. reported a data breach occurring between May 29 and May 30, 2023, affecting approximately 1 million individuals. The incident involved unauthorized access to personal information including names, addresses, Social Security numbers, and financial data. The company engaged forensic investigators and is offering credit monitoring services to affected individuals.
Affected (this filing): 1,000,000
Milliman, Inc., a provider of administrative services for employee benefit and pension plans, reported a data breach that occurred through a third-party vendor, Pension Benefit Information, LLC (PBI). PBI utilized the MOVEit Transfer software, which contained a zero-day vulnerability (CVE-2023-34362). Between May 29 and May 30, 2023, an unauthorized third party exploited this vulnerability to access and download data from PBI's servers. The breach was discovered on July 21, 2023, and affected personal information, including names and Social Security numbers.
Affected (this filing): 160
Milliman, Inc., a business sector entity reported a unauthorized access incident to the Washington Attorney General. The organization became aware of the incident on 2023-05-31 and filed notice on 2023-08-14. 2,879 Washington residents were affected. 75 days elapsed between awareness and notification. 2 days to identify the breach. 0 days to contain the breach.
Affected (this filing): 2,879
Milliman, Inc. reported a data breach to the Oregon Attorney General. The breach was reported on 2023-08-14. The breach occurred during 5/29/2023 - 5/30/2023. The breach was discovered on 7/21/2023. 44,415 individuals were affected. Notice was sent on 8/14/2023.
Affected (this filing): 44,415
Milliman, Inc. notified the Idaho Attorney General of a data breach involving its third-party vendor, Pension Benefit Information, LLC (PBI). PBI's MOVEit Transfer software was exploited via zero-day vulnerability CVE-2023-34362 between May 29-30, 2023. The incident affected 869 Idaho residents, exposing names, addresses, dates of birth, and Social Security numbers. PBI patched the vulnerability and offered 24 months of credit monitoring. Milliman halted data transfers to PBI and is reviewing vendor security practices.
Affected (this filing): 869
Milliman Inc reported a data breach to the Montana Attorney General. The breach was reported on 2023-08-14. The breach occurred from 5/29/2023 to 5/30/2023. 145 Montana residents were affected.
Affected (this filing): 145
Milliman, Inc. notified the NH AG of a data breach involving its third-party vendor, Pension Benefit Information, LLC (PBI). PBI's MOVEit Transfer software was exploited via CVE-2023-34362 (zero-day) on May 29-30, 2023. An unauthorized actor downloaded data belonging to 335 New Hampshire residents. Milliman stopped data transfers to PBI and is enhancing vendor security. PBI patched the vulnerability and offered 24 months of credit monitoring.
Affected (this filing): 335
Milliman, Inc. reported an external system breach (hacking) occurring between May 29 and May 30, 2023, discovered on July 21, 2023. The incident affected 5,023 individuals, including 8 Maine residents. Personal information acquired included names and Social Security Numbers. Milliman provided 24 months of credit monitoring and identity theft protection services through Kroll.
Affected (this filing): 5,023