FEDERALItem 1.05 · mandatoryHackingFinancial ServicesFinanceData ExfiltratedCustomer Data InvolvedDelayed DiscoveryPIILowActive

River Financial Corporation

bd_5003c9d941db0a9c · schema v1 · pii pii-v1

Severity

Low

Discovered

Jun 19, 2026

Filed

Jul 10, 2026

To disclose

21 days

Affected

Not disclosed

Linked

5 filings

Confidence

70%

Full breach record for River Financial Corporation →

River Financial Corporation filed a supplemental 8-K regarding a cybersecurity incident. An unauthorized threat actor accessed portions of its network and removed certain data. The nature and scope of the information, including PII, is still being determined. No fraud has been reported. Two class action lawsuits have been filed. The full impact has not yet been determined.

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SEC clockMateriality determined Jun 19, 2026 → Filed Jul 10, 202621d ✗ SEC 4-day late21 days discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

discovery → filing · 22 days

Jun 19, 2026

Discovered

Jul 10, 2026

Filed

vs. sector median

5 wks faster

This filing is one of 5 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

SEC 8-Kbd_712200f8a5f0b33a2026-07-06 · +4dVerified by operator
SEC 8-Kbd_994819586d228b3b2026-07-17 · +7dVerified by operator
SEC 8-Kbd_b49f2a1e760cb3ea2026-06-25 · +15dCandidate
SEC 8-Kbd_a605d6d2312874f32026-07-30 · +20dVerified

Name: River Financial Corporation
norm: river financial
SEC CIK: 0001641601

Name: River Financial Corporation
norm: river financial
SEC CIK: 0001641601
Industry: Financial Servicesllm

Discovered: Jun 19, 2026
Materiality determined: Jun 19, 2026
Notification sent: Jul 10, 2026
Affected individuals: Not disclosed
Data types: PII
Attack vector: Unauthorized Access
MITRE ATT&CK: T1041 Exfiltration Over C2 Channel
Threat actor: External

During the incident: River has determined that an unauthorized threat actor accessed portions of its network and removed certain data from its environment
River is working to determine the nature and scope of the information involved
Two class action lawsuits were filed against River relating to the incident
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 21 days(21 days from discovery to filing)
Compliance flags: SEC 4-day late · 21d
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.
Clock breakdown: Statute Window Elapsed Threshold Status
SEC
Materiality determined: Jun 19, 2026
→ Filed: Jul 10, 2026
21d cal. 4 business days SEC 4-day late

Statute	Window	Elapsed	Threshold	Status
SEC	Materiality determined: Jun 19, 2026 → Filed: Jul 10, 2026	21d cal.	4 business days	SEC 4-day late

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 5 filings

View merged incident ↗

SEC 8-KJun 25 · first

SEC 8-K+11d

SEC 8-K+15d · this page

SEC 8-K+22d

SEC 8-K+35d

Pattern: first filing Jun 25, last Jul 30 — a 35-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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 filing

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

SEC 8-K / victim statementThis record

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

Source URL: https://www.sec.gov/Archives/edgar/data/1641601/000119312526300763/ck0001641601-20260619.htm
DisclosureLens renders the full SEC/HHS filing inline below from the originating regulator’s public record (§4.5 fair report privilege).
Filed at: Jul 10, 2026
Raw hash: fce9ad5679b65d0acf3abc5a5e462ca98d1ac50c86f56d71f58cd0869b84341b

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Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityRiver Financial Corporation

Victim entityRiver Financial Corporation

Incidentdiscovered Jun 19, 2026

Stated responseRiver has determined that an unauthorized threat actor accessed portions of its network and removed certain data from its environment

ComplianceSEC 4-day late

Extraction provenanceno artifact recorded

Source provenancewww.sec.gov

Source filing