Mariner Wealth Advisors Data Breach Exposes Sensitive Information of Nearly 9,000 Individuals Mariner Wealth Advisors LLC, a Kansas-based wealth management firm, has reported a data breach affecting 8,995 individuals across the U.S., including 117 Massachusetts residents and 17 Maine residents. The incident stemmed from unauthorized access to three associates’ cloud applications by a criminal third party. The breach was discovered after the company detected suspicious activity, prompting an investigation with third-party cybersecurity experts. The probe confirmed that the attacker accessed and downloaded files containing personally identifiable information (PII), including names, account numbers, Social Security numbers, dates of birth, driver’s licenses, and other government ID numbers. In response, Mariner Wealth Advisors is providing complimentary credit monitoring through Cyberscout, offering single-bureau credit monitoring, reports, scores, and fraud assistance for 12 or 24 months, depending on the affected individual’s state. Those impacted must enroll within 90 days of receiving their notification letter via the Cyberscout website using a unique activation code. A dedicated support line is available for assistance. The breach highlights the ongoing risks of cloud-based storage and the potential exposure of sensitive financial data in cyberattacks.

Mariner Wealth Advisors Suffers Data Breach Impacting Nearly 9,000 Clients Mariner Wealth Advisors, a Kansas-based firm managing $609 billion in assets, disclosed a data breach last week that may have exposed the personal information of approximately 8,995 individuals. According to a filing with Maine regulators, the incident involved unauthorized access to three associates’ cloud applications, potentially compromising names, account numbers, birthdates, and Social Security numbers. The company detected suspicious activity in November and immediately activated its incident response plan, isolating and securing the affected accounts. While financial and investment systems remained unaffected, Mariner confirmed that a "criminal third party" accessed and downloaded certain files. No evidence of data misuse has been found to date. Mariner has engaged federal law enforcement and regulatory authorities, hired a third-party researcher to monitor for data misuse, and is offering identity theft protection services to affected clients. The firm, backed by private equity firm Leonard Green & Partners and asset manager Neuberger Berman, operates across 42 states. This breach follows a rising trend of cyber incidents targeting wealth management firms, including recent disclosures from LPL Financial and Ameriprise Financial.