Clustered 6 filings across 4 jurisdictions · filing window Nov 1, 2025 → Jan 25, 2026. View entity profile → Other incidents for this victim →
incident inc_ca3bee5f3f544b1d · merge_method human · confidence 100%
Discovered → first regulatory filing
Range of discovered_at dates across filings
Gap between first leak claim and first regulatory filing
Time between earliest and latest filing
Not recorded for this incident
Materiality delta · SEC filing delay — no SEC 8-K in this cluster.
IN ME NH
Leak Site · 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
Nov 1, 2025
When the intrusion reportedly occurred, per the linked filings
Cytek Biosciences Cytek Biosciences is a leading cell analysis solutions company founded in 1992 and headquartered in Fremont, California with global offices across North America, Europe, and Asia. Sold 0% All data was sold, stay with us, we will upload new Companies later More
Nov 5, 2025
Reported by NEW HAMPSHIRE AG filing
Nov 28, 2025
Reported by MAINE AG filing
A biotechnology firm that develops and supplies advanced, cost-effective flow cytometry instruments and related services used worldwide by researchers and clinicians. Its compact systems and streamlined workflows enable high-throughput, single-cell analysis for applications such as cancer immunology, leukemia and lymphoma diagnosis, and transplant monitoring. Distinguished by offering high-end capabilities at lower cost, the company accelerates scientific discovery through technical innovation, exceptional customer support, and a commitment to ethical practices and community engagement. Headquartered in Fremont, California, it has been publicly traded on NASDAQ since 2021. We have 7.36 TB of downloaded data.
Cytek Biosciences Cytek Biosciences is a leading cell analysis solutions company founded in 1992 and headquartered in Fremont, California with global offices across North America, Europe, and Asia. Sold 0% All data was sold, stay with us, we will upload new Companies later More
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.
Cytek Biosciences Inc reported a data breach to the Indiana Attorney General. The breach occurred on 2025-11-01 and was reported on 2025-12-22. 2 Indiana residents were affected. 331 individuals affected in total.
Affected (this filing): 331
Cytek Biosciences, Inc. reported a data breach to the Maine Attorney General, stating that an external system breach (hacking) occurred on November 1, 2025. The breach was discovered on November 28, 2025. One Maine resident was affected. The company offered 24 months of identity theft protection services to those impacted.
Affected (this filing): 1
Cytek Biosciences, Inc. notified the New Hampshire Attorney General of a security incident involving unauthorized access to systems affecting 3 New Hampshire residents. The breach occurred around November 1, 2025, and was discovered on November 5, 2025. Personal information of Cytek employees, including names, SSNs, health data, and credentials, was accessed. Cytek engaged forensic investigators, reported to law enforcement, and offered 24 months of credit monitoring.
Affected (this filing): 3