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Insight Partners Begins Notifying 12,657 People After Ransomware Breach Detailed in State Filings

Attorney general filings newly pin down the October intrusion to January encryption timeline, confirming the scale of exposure.

Overview

  • Insight Partners says a threat actor used a sophisticated social engineering attack to access its servers on or around October 25, 2024.
  • After exfiltrating data, the attackers began encrypting servers at about 10:00 a.m. EST on January 16, 2025, consistent with ransomware activity.
  • The company reported to Maine that 12,657 individuals were affected, including current and former employees as well as limited partners.
  • Stolen information includes fund, management company and portfolio company data, plus banking, tax, and personal details tied to employees and investors.
  • Formal notification letters are being mailed with complimentary credit or identity monitoring, and the firm has not disclosed any extortion demands, ransom payments, or the responsible group.