The sinobi ransomware group listed Peaker Services on its data leak site on 2025-12-16. Country: US Sector: Manufacturing Domains named: www.peakerservices.com Claim as published on the leak site: Peaker Services, Inc. engages in rebuilding, repairing, and maintaining diesel engines and related equipment for railroad, power generation, and marine companies. The company also designs, assembles, and installs systems used in generator, compressor, propulsion, and mechanical drive systems; designs and installs custom control systems; and provides emergency and custom repair, case and pan repair, component and assembly rebuilding, contract maintenance, inspection, and surveying services. In addition, it engages in the distribution of power generation and control equipment. The company was founded in 1971 and is based in Brighton, Michigan with facilities in Brighton, Michigan; and New Castle, Delaware. Peaker Services, Inc. operates as a subsidiary of PSI Holding Company.