Westat, Inc. — May 2023 breach
Clustered 11 records across 8 jurisdictions: 10 filings and 1 leak-site claim · filing window Jul 21, 2023 → Nov 3, 2023. View entity profile → Other incidents for this victim →
incident inc_c86759fc19634658 · merged by deterministic · confidence 100%
Litigation Timing
Discovered → first regulatory filing
Range of discovered_at dates across filings
Days between the first sighting of the earliest-seen leak-site claim and the first regulatory filing. Measured from when the aggregator first saw the post, not the crew's own (often earlier) date. Positive = the claim came first (public exposure before disclosure). Negative = the claim trailed the filing, so there was no pre-disclosure leak. Counts regulatory filings only — press coverage is not a regulatory disclosure.
Time between earliest and latest filing
Not recorded for this incident
Materiality delta · SEC filing delay — no SEC 8-K in this cluster.
Sensitive data
identity_governmentIncident timeline
Dashed segments are unestablished, not zero — they fill in as filings merge into this incident.
Member cascade — every filing and leak-site claim in this incident
- JUL 10Leak sitecl0p postfirst record · attacker claim · unverifiedoperator-confirmedday 0
- JUL 21NH AGNH AG notice60 NH residentsoperator-confirmed+11d
- JUL 21VT AGVT AG noticeno count statedauto-linked+11d
- JUL 21MT AGMT AG notice68 MT residents+11d
- JUL 21IN AGIN AG noticestates nationwide total 7,954operator-confirmed+11d
- JUL 21ME AGME AG noticestates nationwide total 7,954+11d
- JUL 21MA AGMA AG notice130 MA residentsoperator-confirmed+11d
- OCT 13IN AGIN AG noticestates nationwide total 261auto-linked+95d
- OCT 13HHS OCRHHS OCR noticestates nationwide total 51,513auto-linked+95d
- OCT 16SC AGSC AG notice10,282 SC residentsoperator-confirmed+98d
- NOV 3HHS OCRHHS OCR noticemost recent · states nationwide total 20,045+116d
- Watching for additional filings — new sources merge into this incident automatically.
Roll-up facts — reconciled across members
- Breach window
- May 28, 2023 – May 29, 2023 NH AG
- Discovered
- May 30, 2023NH AG + VT AG + MT AG +1Jun 22, 2023ME AG + HHS OCRfilings disagree on discovery
- Data types
- Employment · Health (basic) · Identity (basic) · Government ID · PHI · PII NH AG + VT AG + MT AG +4
- Attack vector
- Unauthorized Access NH AG
Each fact cites the member filing that establishes it; when filings conflict, every value shows with its source.
Count reconciliation
per-state reported counts
Nationwide (stated in a filing)
51,513
Sum of filed state slices
10,696· 20.8% of stated
79% of the stated total lives in states whose filings carry no count — the dashed share shrinks as filings land.
State AGs report only their own residents; teal bars show each state's reported slice. The gray US row is the nationwide total reported in a linked filing.
Evidence ladder — rungs this incident occupies
Attacker assertion only. Establishes: claim date, group, alleged victim.
No press coverage linked yet.
Unlocks: discovery date, data types, affected count, compliance clock.
No SEC filing or victim statement yet.
Merge provenance
- Method
- deterministic
- Confidence
- 1.00 · above the 0.85 auto-merge floor
- Reviewed
- operator-reviewed Oct 22, 2026 · at least one link edge was human-adjudicated
- Audit
- Every link edge records its method, confidence and model + prompt versions (100% is the strongest edge).
Merges are reversible — a wrong link can be detached with its audit trail intact. How merging works.
Filing velocity
Spread
105 days
Cadence
~1 / 11.7d
vs. multi-state median
17.5× slower
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. This page states only what the linked filings agree on; each filing's own account stays on its own record, linked from the timeline below.
The weekly clock on records like this one
The Disclosure Clock is a weekly briefing on what landed in the disclosure record, and the gap between the criminals' post and the regulator's filing — measured on the whole record, with the method shown.
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