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Phase Four

US
commercialFounded 2015
Hawthorne, California, United States
www.phasefour.io/
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0.0-5.0

All verified mentions of this organization in source documents.

The acquisition of Phase Four’s technology will enhance Ranger's capabilities for Department of Defense missions.

RelationshipsCapabilityValue 3.5Sep 22, 2025Quantum Space Acquires Phase Four’s Propulsion Tech

Phase Four’s multi-modal propulsion system utilizes both chemical and electric propulsion for high thrust or high efficiency maneuvers.

CapabilityValue 4.0Sep 22, 2025Quantum Space Acquires Phase Four’s Propulsion Tech

Quantum Space is using its $40 million Series A extension round to acquire Phase Four’s multi-modal propulsion technology.

RelationshipsFinancialCapabilityValue 4.5Sep 22, 2025Quantum Space Acquires Phase Four’s Propulsion Tech

Quantum Space intends to integrate Phase Four’s propulsion capabilities to support its Golden Dome project ambitions.

RelationshipsCapabilityValue 3.8Sep 22, 2025Quantum Space Acquires Phase Four’s Propulsion Tech

Phase Four is testing its radio-frequency thruster at its facility in Hawthorne, California.

CapabilityGeneralValue 3.2Nov 4, 2024Phase Four announces monopropellant multi-mode propulsion systems

Phase Four will supply the electric propulsion component in operational ground demonstrations of both ASCENT and hydrazine-based multi-mode systems by the end of 2025-01-01.

RelationshipsPlanCapabilityValue 4.0Nov 4, 2024Phase Four announces monopropellant multi-mode propulsion systems

Phase Four was founded in 2015 to provide next-generation electric propulsion solutions and services for small satellites.

CapabilityGeneralValue 2.3Nov 4, 2024Phase Four announces monopropellant multi-mode propulsion systems

Phase Four anticipates taking orders for its monopropellant multimode systems in the first half of 2025.

PlanGeneralValue 3.0Oct 22, 2024Phase Four Announces Monopropellant Multi-Mode Propulsion Systems

Phase Four will supply the electric propulsion component in operational ground demonstrations of both ASCENT and hydrazine-based multi-mode systems by the end of 2025-01-01.

RelationshipsPlanCapabilityValue 4.0Oct 22, 2024Phase Four Announces Monopropellant Multi-Mode Propulsion Systems

Phase Four is testing a radio-frequency thruster at its facility in Hawthorne, California.

CapabilityGeneralValue 3.8Oct 22, 2024Phase Four Announces Monopropellant Multi-Mode Propulsion Systems

Redwire and Phase Four will design and develop a Hall Effect Thruster called the Valkyrie Thruster based on an existing design.

CapabilityRelationshipsValue 4.0Jul 9, 2024Redwire Developing Advanced Thruster Technology to Offer Reliable, High-Volume Production to Support DoD Small Satellite Supply Chain

Phase Four was founded in 2015 to develop radio-frequency thruster technology and address the needs of proliferating satellite constellations.

CapabilityGeneralValue 2.8Jul 9, 2024Phase Four Partners with Redwire to Expand Space Propulsion Offerings and Deliver Hall Effect Thrusters

Phase Four and Redwire Space signed a strategic cooperation agreement to build and deliver Hall Effect Thrusters to government and commercial markets.

RelationshipsValue 4.2Jul 9, 2024Phase Four Partners with Redwire to Expand Space Propulsion Offerings and Deliver Hall Effect Thrusters

Redwire Corporation (NYSE: RDW) signed a strategic cooperation agreement with Phase Four on 2024-07-09 to build and deliver advanced thruster technology for national security space programs.

RelationshipsCapabilityLegalValue 4.2Jul 9, 2024Redwire Developing Advanced Thruster Technology to Offer Reliable, High-Volume Production to Support DoD Small Satellite Supply Chain

Phase Four is an in-space propulsion company that will partner with Redwire to expand the types and volume of Hall Effect Thrusters available to the industry.

RelationshipsCapabilityGrowthValue 3.6Jul 9, 2024Redwire Developing Advanced Thruster Technology to Offer Reliable, High-Volume Production to Support DoD Small Satellite Supply Chain

Phase Four has a $14,900,000 DARPA Otter contract for an air-breathing electric propulsion system for extended satellite operations at altitudes ranging from 90 to 450 km.

RelationshipsFinancialCapabilityPlanValue 4.9Jun 17, 2024Redwire wins contract for VLEO demonstration

The Defense Advanced Research Projects Agency awarded Phase Four a $14,900,000 contract to deliver an air-breathing electric propulsion system for extended satellite operations in Very Low Earth Orbit at altitudes of about 90–450 km.

RelationshipsFinancialCapabilityPlanValue 5.0Apr 5, 2024Phase Four Awarded $14.9M Contract by DARPA to Develop Electric Propulsion for VLEO Satellites

Phase Four has designed and built electric propulsion systems that have been launched on nine satellites with over 5,300 days of cumulative on-orbit flight heritage since the company was founded.

CapabilityGrowthValue 4.0Apr 5, 2024Phase Four Awarded $14.9M Contract by DARPA to Develop Electric Propulsion for VLEO Satellites

Phase Four completed propellant fill operations for Maxwell propulsion units using in-house developed ground support equipment operated by its engineering team.

CapabilityValue 4.0Sep 12, 2023Phase Four's Maxwell Propulsion System Achieves Flight Heritage

Phase Four plans to begin delivering Maxwell Block 3 to customers in June 2024.

PlanGeneralValue 3.5Sep 12, 2023Phase Four demonstrates Maxwell Block 2 thruster in orbit
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