Martinez & Shanken, an accounting and tax firm based in Gilbert, Arizona, was targeted in a cyberattack by the Qilin ransomware group on May 28, 2026. This incident has been reported by third-party analysis sites and social media, but official confirmation from the company or regulators regarding a data breach and data exposure is not available.
As of now, there is no verified data on the number of affected individuals or specific types of data compromised, such as SSN, medical, or financial information. No official breach notification letters have been released, nor have any state Attorney General filings been made. There is also no information indicating whether this was a vendor breach affecting other entities.
Details about what specific data, if any, was compromised remain unconfirmed. Information about this event primarily stems from ransomware group claims rather than official company or regulatory statements.