Arthur Chen

Arthur Chen is a London-based solo angel writing $100k-$250k checks at seed and Series A in digital health and AI/ML in healthcare. The combination of UK geography, AI focus, and meaningful check size positions him as a credible participant in European AI-healthcare seed and Series A rounds, though the absence of a website, Twitter, or thesis statement makes intelligence on his program thin. Founders building UK or European AI-native healthcare software, digital health platforms with strong AI defensibility, or companies where a London-based individual angel can add value to the cap table alongside an institutional lead are the natural fit. He is unlikely to be useful for biotech, devices, or healthcare companies without a clear AI or digital health angle. The check size is meaningful enough to be a real signal in a seed round and a participant in a Series A. Outreach via LinkedIn is the primary channel; warm introductions through the London AI and digital health community will materially outperform cold notes. Without a published thesis, founders should rely on Crunchbase to validate recent activity and on the London venture community for context on his deal flow before investing time. Best treated as a high-quality individual angel for the right European AI healthcare founder; US founders are unlikely to be a fit unless there’s a clear UK or European angle to the company.