The medusa ransomware group listed Hartwig Mechanical Inc on its data leak site on 2025-06-09. Country: US Sector: Manufacturing Domains named: hartwigmechanical.com Claim as published on the leak site: Hartwig Mechanical Inc is a company that operates in the Commercial & Residential Construction industry. It employs 10to19 people and has 1Mto5M of revenue. The company is headquartered in 20800 E. Brink Street Harvard, IL 60033 The total amount of data leakage is 456 GB