Arthur Keller

Arthur Keller is a five-time founder with two successful exits, who has built his entire career outside traditional corporate structures. He has exclusively founded and led his own companies, turning contrarian thinking into a competitive edge across fintech, AI, creative production, and global commerce.

Arthur's entrepreneurial path includes founding and exiting a high-end production company, as well as a premium tequila brand he successfully sold after prevailing in a complex U.S. federal court case. Today, as Founder & CEO of London-based Ross & Andersen LLP, he delivers global financial solutions to independent professionals and small businesses, with approved vendor status at LVMH, Kering, Amazon, Universal and more. Through Vantage Partners Limited in Hong Kong, he accelerates growth in the luxury and sports sectors. Arthur was also an early force behind the adoption of local AI at Euclid, a Swiss commodity trading and risk management company. He helped secure institutional funding from former C-suite executives of a top-three global commodity trading house and drove the implementation of privacy-first AI systems in one of the most data-sensitive industries. He now serves as a board member of Euclid SA.

A former top-50 Olympic-class sailor, Arthur brings elite discipline and execution focus to every venture. This is complemented by a creative vision shaped by a decade in New York City's fashion industry, working for the world's biggest fashion brand. Today, all of it converges in Monark, the American neobank for global citizens. AI amplifies capability, remote work erases distance, and a new generation of the world's most ambitious people already lives and earns without borders. Arthur Keller is building the financial home for the new economy.