Optima Tax Relief

Disclosed Jun 6, 202519,732 affectedConfirmed

Chaos ransomware gang leaks Optima Tax Relief case files

The Chaos ransomware gang listed Optima Tax Relief on its leak site and claimed to have stolen 69 GB of corporate data and customer case files.

What is known

People affected	19,732 (as reported by the organization)
Disclosed	Jun 6, 2025
Discovered	Oct 10, 2025
Happened	May 1, 2025
Attack	Ransomware
Data exposed	Internal documentsOtherSocial Security numbersHealthInsurancePayment cardsFinancialNames
Sector	Finance · US
Status	Confirmed

Sources

Official noticeoag.ca.gov

California Attorney General breach notice: Optima Tax Relief

Newsbleepingcomputer.com

Tax resolution firm Optima Tax Relief hit by ransomware, data leaked

Official noticeoag.my.site.com

Texas Attorney General data security breach report BR-0004675: Optima Tax Relief

Official noticeago.vermont.gov

Vermont Attorney General: 2025-10-20 Optima Tax Relief Data Breach Notice to Consumers

Official noticein.gov

Indiana Attorney General 2025 data breach report: Optima Tax Relief

Notices filed

TotalJun 6, 2025

ResearchCount not stated

Residents of CAAug 15, 2025

California AGCount not stated

Residents of INAug 15, 2025

Indiana AG296 people

Residents of VTOct 20, 2025

Vermont AGCount not stated

Residents of CANov 18, 2025

California AGCount not stated

Residents of TXNov 19, 2025

Texas AG2,351 people

Other breaches at Optima Tax Relief

Breach, details not statedBreach notice filed with the Indiana AG, details not stated.5,027 affectedFinanceUSMay 2, 2023

History of this record

source2026-09-25

empty to https://www.in.gov/attorneygeneral/consumer-protection-division/id-theft-prevention/files/DB-Year-to-Date-Report-2025.pdfby backfillSource

source2026-09-25

empty to https://ago.vermont.gov/document/2025-10-20-optima-tax-relief-data-breach-notice-consumersby backfillSource

data_types2026-09-25

["internal-docs","other"] to ["internal-docs","other","ssn","health","insurance","payment-card","financial","names"]by backfillSource

records_basis2026-09-25

empty to organizationby backfillSource

records2026-09-25

empty to 19732by backfillSource

discovered2026-09-25

empty to 2025-10-10by backfillSource

attack2026-09-25

unknown to ransomwareby seedSource

data_types2026-09-25

[] to ["internal-docs","other"]by seedSource

disclosed2026-09-25

2025-08-15 to 2025-06-06by seedSource

summary2026-09-25

empty to The Chaos ransomware gang listed Optima Tax Relief on its leak site and claimed to have stolen 69 GB of corporate data and customer case files.by seedSource

title2026-09-25

empty to Chaos ransomware gang leaks Optima Tax Relief case filesby seedSource

disclosed2026-09-25

2025-11-18 to 2025-08-15by backfillSource

Added2026-09-25

First recordedby backfillSource

First seen 2026-09-25 (California AG), confirmed by California AG. Record counts are as reported. Not legal advice.

Everything about Optima Tax Relief