Ransomware.live listed Argentem Creek Partners, a U.S. investment management and private credit firm, as a victim of the N0n ransomware group. The listing identifies September 18, 2026, as the attack date and reports that the group claimed evidence from the firm’s corporate network. The incident has not been independently confirmed by Argentem Creek Partners or a government regulator in the available research.
The reported material includes more than 2.5 million connection records, an internal systems map covering Active Directory, SharePoint, managed-service-provider tooling and office-security integrations, and tax-season document flows involving the firm and its investor document delivery platform. The available information does not state how many individuals were affected and does not confirm exposure of Social Security numbers, medical information, bank-account information, credit-card information or other specific personal financial records. No official consumer notification, regulator filing or litigation was identified.