James Proud

James Proud is a co-founder of Subtrate, a company operating in the semiconductor manufacturing sector. Subtrate substrate is building America's next-generation semiconductor foundry. Based in San Francisco, California, United States, James leads the company's strategic vision and day-to-day operations.

Under James's leadership, Subtrate recently secured $100M in Seed funding on Oct 28, 2025, backed by investors including Founders Fund. This funding milestone reflects strong investor confidence in both the founding team's execution capabilities and the company's market opportunity.

With fresh capital, James and the team are focused on scaling operations, expanding the product roadmap, and building out a world-class team. The semiconductor manufacturing market continues to see significant investment activity, positioning Subtrate to capitalize on growing demand.For vendors and partners, this represents an ideal window to engage.