Melani Lowman-Walton
While the net wealth of Melani Lowman-Walton is uncertain, the total net worth of her and her husband Rob Walton is valued at $45.4 billion. Rob Walton is the successor to Walmart’s fortune, as Sam Walton’s eldest sibling, the father of Walmart. The pair is heavily engaged in philanthropic endeavors, and they have also founded the Rob and Melani Walton Foundation. It seeks to give grants to partners whose mission is to have a larger impact.
Cari Tuna Moskovitz
Dustin Moskovitz is one of the world’s youngest self-made billionaires, worth $11.6 billion at present. He is a Facebook co-founder who used to be VP of Engineering and CTO for the company until 2008. He went on to co-found another company named Asana, which is developing apps. The youngest pair to sign the Giving Pledge is Dustin and his wife Cari Tuna, which is a philanthropic initiative created by Warren Buffet and Bill Gates. The couple has founded Good Ventures, their own philanthropic organization. Cari oversees the foundation’s activities.