Pinnacol Assurance | 6,941 followers on LinkedIn. Pinnacol is a workers’ compensation insurance carrier offering top-rated injured worker care. | Pinnacol Assurance is a top-performing provider of workers’ compensation insurance. Our members receive top-rated injured worker care, customized safety solutions and a comprehensive return to work program that helps reduce risk and save costs. Our highest-performing injured worker care, tailored safety solutions and renowned return to work program reduce costs while keeping workers safe regardless of where they are.