Breaches and leak-site claims

Ordered by the source-provided record date when present, even when its meaning is unknown; otherwise, by when this tracker first saw the record. Every displayed date states which event it represents.

Per-incident affected-count reconciliation across government breach sources is not currently possible. The Maine Attorney General portal has been offline since 2026-06-12, and the California Attorney General publishes no affected-persons count. Where one incident is reported to more than one source it is cross-linked, and every count shown is only the number that source itself reported.

A "No longer listed" badge means the victim was present on the leak site and is now absent from the claiming group's current listing, confirmed across two consecutive checks. It is an observation only. It is not a confirmation that the organization paid, negotiated, or resolved the incident, and a group that takes down its own site can cause it. Removal is tracked for RansomLook claims, the only source that publishes a full per-group listing. A claim from another source carries no badge because its removal is not tracked, which is not evidence the victim is still listed.

Leak-site claim data:RansomLook(CC BY 4.0), withransomware.liveas a failover, credited voluntarily (it carries no attribution obligation). Claims are unverified until the affected organization confirms an incident. Confirmed breaches come from the California Attorney General breach portal, the Department of Health and Human Services Office for Civil Rights (including its 42 CFR Part 2 records), Securities and Exchange Commission 8-K filings, andHave I Been Pwned(CC BY 4.0).