AccidentalFinancial ServicesFinanceMisdeliveryCustomer Data InvolvedGovernment IDIdentity (basic)MediumContained

DEXCOM, INC.

bd_b7744581e1d27ccc · schema v1 · pii pii-v1

Severity

Medium

Discovered

Apr 29, 2026

Filed

Jun 12, 2026

To disclose

—

Affected

Not disclosed

Linked

4 filings

Confidence

65%

Full breach record for DEXCOM, INC. →4 incidents on file

Lockton, an insurance brokerage, inadvertently disclosed employee PII (SSNs, names, DOBs) to RFP participants in an Excel file on April 29, 2026. Access was revoked, and participants confirmed deletion. Lockton provided two years of Experian IdentityWorks to affected Dexcom employees. No evidence of misuse was found.

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Incident timeline

Apr 29, 2026

Begins

Apr 29, 2026

Discovered

Jun 12, 2026

Filed

This filing is one of 4 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

California State AGbd_1605ecaea23bf1532026-06-12Candidate
New Hampshire State AGbd_776fb90ed215b9e22026-06-12Verified
Massachusetts State AGbd_c65511a6a83cc3732026-06-12Verified

Name: the West Series of Lockton Companies, LLC
norm: the west series of lockton companies

Name: DEXCOM, INC.
norm: dexcom
Domain: dexcom.com
Industry: Financial Servicesllm

Discovered: Apr 29, 2026
Breach occurred: Apr 29, 2026
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jun 12, 2026
Affected individuals: Not disclosed
Data types: Government IDIdentity (basic)
Data elements: Social Security numberDate of birth
Attack vector: Misconfiguration
MITRE ATT&CK: T1535 Unused/Extra Cloud Storage

During the incident: Revoked RFP participants' access to the Excel file
Provided complimentary, two-year membership in Experian IdentityWorks
Changes made: Reviewed, audited, and strengthened controls and processes
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 4 states

View merged incident ↗

California State AGJun 12 · first

New Hampshire State AGJun 12 · first

Massachusetts State AGJun 12 · first

Nebraska State AGJun 12 · first · this page

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://nebraska.gov/ago/data-breach/documents/160f2c75-393a-4c59-a83e-1414228f6b95.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 12, 2026
Raw hash: 4c692435d4c0dceb7e65a2a50146a661682abded9b3845bfc3d546574f53f0f5

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entitythe West Series of Lockton Companies, LLC

Victim entityDEXCOM, INC.

Incidentdiscovered Apr 29, 2026

Stated responseRevoked RFP participants' access to the Excel file

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancenebraska.gov