HackingFinancial ServicesTechnologyFinanceStolen CredentialsCustomer Data InvolvedIdentity (basic)Government IDMediumContained

ASSETMARK, INC.

bd_7ac3f8543828d6ee · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 15, 2026

Filed

Jun 11, 2026

To disclose

—

Affected

Not disclosed

Linked

12 filings

Confidence

67%

Full breach record for ASSETMARK, INC. →2 incidents on file

AssetMark, Inc. notified Nebraska residents of a data breach involving suspicious activity with employee login credentials. On May 15, 2026, unauthorized access was gained, resulting in the download of files containing customer personal information, including names, addresses, and government identifiers. AssetMark terminated access, reset credentials, engaged forensic investigators, and offered 24 months of credit monitoring.

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Incident timeline

May 15, 2026

Discovered

Jun 11, 2026

Filed

This filing is one of 12 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Washington State AGbd_33f04a386aea24d32026-06-11Verified
Montana State AGbd_5589a85ddada03aa2026-06-11Verified
Oregon State AGbd_6886b6cefdfdb7fd2026-06-11Verified
Delaware State AGbd_6af2c69a79abc5b22026-06-11Verified

Show 6 more filings ↓up to 27d gap

New Hampshire State AGbd_c7f8a628cbde3f8a2026-06-11Verified
Massachusetts State AGbd_6ed05ad3f644267a2026-06-12 · +1dCandidate
Rhode Island State AGbd_e099e3ab62a709032026-06-15 · +4dVerified
Texas State AGbd_30436bcce43994592026-06-18 · +7dVerified
California State AGbd_b328f99afc4a52512026-06-26 · +15dVerified
Rhode Island State AGbd_cb19c05bc1b11d032026-07-08 · +27dVerified

Showing first 10 of 11 linked disclosures.

Name: ASSETMARK, INC.
norm: assetmark

Name: ASSETMARK, INC.
norm: assetmark
Industry: Financial ServicesllmTechnologyllm

Discovered: May 15, 2026
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: ExternalFinancial
Initial access: valid_credentials

During the incident: Terminating the unauthorized access
Re-setting employee credentials
Engaging internal and external information security professionals to conduct a forensic investigation
Increasing systems monitoring
Implementing additional security safeguards
Offering credit monitoring and identity theft prevention services at no cost to you for 24 months
Changes made: Re-setting employee credentials
Increasing systems monitoring
Implementing additional security safeguards
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 · 11 filings · 10 states

View merged incident ↗

Washington State AGJun 11 · first

Montana State AGJun 11 · first

Oregon State AGJun 11 · first

Delaware State AGJun 11 · first

New Hampshire State AGJun 11 · first

Nebraska State AGJun 11 · first · this page

Massachusetts State AG+1d

Rhode Island State AG+4d

Texas State AG+7d

California State AG+15d

Rhode Island State AG+27d

Pattern: first filing Jun 11 (WA), last Jul 8 (RI) — a 27-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Cascade drawn from the first 10 linked disclosures of 11 — the full spread may be wider.

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/5c2e7b66-1909-4ed9-8b3c-c603b1b92bfc.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 11, 2026
Raw hash: 8b0b09eca155d00ad02c14f4e21cf38477f08a9a8cbee195faddabd69e6fe259

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityASSETMARK, INC.

Victim entityASSETMARK, INC.

Incidentdiscovered May 15, 2026

Stated responseTerminating the unauthorized access

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancenebraska.gov