DisclosureLens
Leak SiteState AGConfirmed6 records · 4 statesLifecycle stage 2 of 3: ConfirmedUnverified claimConfirmedEnforcedrhysidahigh sensitivity
Merged incident · 6 records

CYTEK BIOSCIENCES, INC. — November 2025 breach

Clustered 6 records across 4 jurisdictions: 4 filings and 2 leak-site claims · filed Dec 22, 2025. View entity profile → Other incidents for this victim →

Determination

Confirmed

Members

6 records

States

4

Affected · reported

331

First → last filing

Dec 22, 2025

Merge confidence

100%

incident inc_ca3bee5f3f544b1d · merged by human · confidence 100%

Confirmed breach. Merged as one breach: 4 regulatory filings and 2 unverified claims. The filings describe unauthorized access. Intrusion Nov 1, 2025, discovered Nov 5, 2025 — the first regulatory filing landed 47 days later. 331 individuals reported across the linked filings. Data reported: Government ID, Identity (basic), Financial account, and 2 more. Each member filing remains the legal record for its jurisdiction.

Litigation Timing

Supplemental
Notification delay
47days

Discovered → first regulatory filing

Discovery variance
23days

Range of discovered_at dates across filings

Leak precedence
Noneclaim trailed by 34d

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.

Filing span
0days

Time between earliest and latest filing

Not recorded for this incident

Materiality delta · SEC filing delay — no SEC 8-K in this cluster.

Regulatory clocksDate basis✓ Clock withheld · confirmation dateMassachusetts✓ MA credit monitoring dueFull clock table in Litigation Timeline

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Cytek Biosciences, Inc. data breach (2025) — filings in 4 jurisdictions, November 2025 · DisclosureLens