The IMNCrew ransomware group listed Derp.org on its data leak site on 2025-05-05. Country: US Sector: Retail & E-Commerce Domains named: derp.org Claim as published on the leak site: We’re the Denver Employees Retirement Plan (DERP). Your partner in building, planning, and living a secure retirement future while serving the city you love. DERP was established January 1, 1963, to provide a defined benefit plan for eligible City and County of Denver employees in the Career Service, certain employees of the Denver Health and Hospital Authority, and DERP staff. We provide a monthly DERP Pension Benefit payment to more than 10,800 retirees and beneficiaries, and are an essential element of the future financial security for almost 10,000 active members.