Phase Four announced the first close of its Series C funding round, securing nearly 60% of the target raise with strong participation from new and existing investors. The round is led by Artemis Group Capital, the Oklahoma-based investment firm helmed by former NASA Administrator Jim Bridenstine, underscoring the growing confidence in Phase Four's innovative propulsion solutions.

Phase Four is a disruptive provider of next generation in-space electric propulsion solutions. The company was founded in 2015 to address the demands of the rapid proliferation of satellite constellations and to accelerate the advancement of its radio-frequency thruster. Phase Four is now a full-spectrum in-space electric propulsion provider of hardware, software and services, teaming with a variety of constellation operators and satellite bus manufacturers to optimize mission effectiveness and control costs through creative exploration of propulsion solutions.