General InformationPhase Four is a California-based electric propulsion company founded in 2019 that manufactures Hall Effect thrusters for commercial satellites, with approximately 100-150 employees.
Funding & FinancialsPhase Four has raised over $40 million in funding including Series A and Series B rounds, with backing from venture firms including Initialized Capital and Khosla Ventures.
Leadership & TeamThe company was co-founded by Fatih Yilmaz (CEO) and Ryan Hartman, with Yilmaz leading as Chief Executive with expertise in advanced propulsion systems.
Recent ActivityPhase Four has secured multiple contracts for satellite propulsion systems and has achieved qualification testing milestones for their Hall Effect thrusters, with increasing commercial adoption among satellite operators.