AccidentalHealthcareProfessional ServicesHealthcareMisdeliveryEmployee Data InvolvedGovernment IDIdentity (basic)EmploymentMediumResolved

DEXCOM, INC.

bd_1605ecaea23bf153 · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Jun 12, 2026

To disclose

—

Affected

Not disclosed

Linked

4 filings

Confidence

66%

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

The West Series of Lockton Companies, LLC, an insurance brokerage providing employee benefit services to Dexcom, Inc., inadvertently disclosed employee personal information to three RFP participants on May 13, 2026. An Excel file sent to solicit proposals for family forming benefits contained Social Security numbers, names, dates of birth, and potentially benefits election data. Access was promptly revoked, and participants confirmed deletion or non-access. Lockton is offering two years of Experian IdentityWorks to affected employees.

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Incident timeline

May 13, 2026

Begins

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

New Hampshire State AGbd_776fb90ed215b9e22026-06-12Verified
Nebraska State AGbd_b7744581e1d27ccc2026-06-12Verified
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: HealthcarellmProfessional Servicesllm

Discovered: —
Breach occurred: May 13, 2026
Materiality determined: —
Notification sent: Jun 12, 2026
Affected individuals: Not disclosed
Data types: Government IDIdentity (basic)Employment
Data elements: Social Security numberDate of birth
Attack vector: Unknown
Third party: via RFP participants

During the incident: Promptly revoked access to the file for RFP participants
Confirmed deletion of the Excel file by RFP participants
Provided complimentary two-year membership in Experian IdentityWorks
Changes made: Review, audit, and strengthen 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 ↗

New Hampshire State AGJun 12 · first

Nebraska State AGJun 12 · first

Massachusetts State AGJun 12 · first

California 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://oag.ca.gov/ecrime/databreach/reports/sb24-624765
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: 3e9177a7263b12cc5f961188a99dafd079417a494deee1bd126321d191a1cc8a

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entitythe West Series of Lockton Companies, LLC

Victim entityDEXCOM, INC.

IncidentUnknown

Stated responsePromptly revoked access to the file for RFP participants

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov