WE ARE FOCUSED ON MONO-LINE WORKERS’ COMPENSATION INSURANCE. Berkley Industrial Comp, formally American Mining Insurance Grou ... p, began operating in 1989 as a specialty carrier offering workers’ compensation coverage to qualified mining and mining related accounts. Known for excellence in loss control, claims management and underwriting, Berkley Industrial Comp has remained focused on our mission as the company has grown and matured. Since becoming a W. R. Berkley Corporation member company in 2007, Berkley Industrial Comp has quadrupled its operating territory, introduced preferred rating plans, focused on continuous improvement in ease of doing business, made significant new investments in technology and added additional highly experienced staff to our team. With an AM Best rating of A+ Superior XV, Berkley Industrial Comp’s commitment to the mining sector remains unwavering. read more