Stuart Posin

Stuart Posin is a Partner and Limited Partner at MKT1 Capital, a venture capital firm based in Pasadena, California. In this role, he focuses on providing investment and strategic support for early-stage B2B startups, contributing to a firm that has advised over 100 emerging companies. Working alongside industry professionals such as Amanda Runner and Andrew Caravella, Posin helps guide portfolio companies in developing scalable marketing strategies and content frameworks. Prior to his transition into venture capital, he built a career in technology leadership, acquiring versatile expertise across multiple operational domains. His current firm also actively engages with the broader technology ecosystem by hosting educational events that have reached thousands of marketing professionals. Posin currently leverages his extensive technical background to evaluate investment opportunities and mentor founders on go-to-market execution within the B2B sector.