Strategic Investment Solutions Inc. Suffers Data Breach, Exposing Sensitive Personal Information New York and Chicago-based law firm Wolf Haldenstein Adler Freeman & Herz LLP is investigating a data breach at Strategic Investment Solutions Inc. (SIS), an Illinois-based financial services firm. The breach, which occurred in November 2025, may have exposed sensitive personal data, including names, Social Security numbers, and financial account information of affected individuals. SIS has begun notifying impacted parties, warning that compromised data may be circulating on the dark web. The firm is urging those who received breach notifications and observed suspicious activity to seek legal counsel. Wolf Haldenstein, a national consumer rights law firm with offices in New York, Chicago, Nashville, and San Diego, is leading the investigation. The firm has extensive experience in data breach litigation and has been appointed to key roles in complex consumer rights cases. Affected individuals may contact the firm for further details.