Mason Asset Management, Inc. | 600 followers on LinkedIn. Mason Asset Management is a Long Island-based real estate investment and advisory company with expertise in the acquisition, management, disposition, and leasing of commercial real estate properties throughout the United States. Founded in 2010, the company invests in value-add properties and provides transactional and advisory services to banks, financial institutions, and owners with a focus on the real estate restructuring industry. Since inception, Mason Asset Management has firmly established its position as the preeminent privately owned owner/operator of retail assets nationally and currently has a national portfolio of more than 120 shopping centers, including 45 regional malls, totaling more than 30 million square feet.