The sinobi ransomware group listed Optimum Window Manufacturing on its data leak site on 2025-12-18. Country: US Sector: Manufacturing Domains named: www.optimumwindowmanufacturing.com Claim as published on the leak site: Optimum Window Mfg is the largest and most diversified manufacturer of steel windows and doors in the United States, offering custom high-tech metal systems for commercial and high-end residential applications since 1985. The company specializes in a wide range of products including fire-rated and non-rated steel windows and doors, aluminum windows and doors, as well as bronze and stainless steel options. Optimum collaborates closely with architects to create custom designs that merge performance, structural integrity, and aesthetic appeal. Their mission emphasizes the importance of precision craftsmanship and technology to deliver unique, high-quality products tailored to their clients' specifications.