Mason Sullivan

Mason Sullivan is an English singer and songwriter. After joining The Oatband in 2020 as a writer and vocalist on Longer Than a Lifetime, he became a contributing songwriter on all the band's subsequent albums. He is known for his extreme songwriting ability, and helped write several major hits for the group, including Thank You Oats, Amendment 19, Jimmy's Antiques, and Sixth Sense.

When Oatband members decided to embark on solo careers in 2022, Sullivan was the only member to continue making pop rock music.

As of March 4, 2024, he is the third richest musician in the world with a net worth of over $183 million. The next richest member of The Oatband, Floss Perot, is in 64th place with $62.5 million.