MAG Partners LP | 7,801 followers on LinkedIn. Woman-owned, WBE-certified, real estate company developing impactful large-scale projects led by MaryAnne Gilmartin. | MAG Partners is a woman-owned and managed 21st century urban development company, dedicated to diversity and inclusivity in the real estate industry. Founded by MaryAnne Gilmartin, we are seasoned leaders in New York City in the development of large-scale, ground-up office, residential and mixed-use projects with decades of experience executing all aspects of the process to realize world class assets that deliver value for our investors. Our mission is to be a premier brand and transformative player in developing a diversified portfolio of assets in strong urban markets.