How Much Did Phase Four Raise?
Funding & Key Investors

Phase Four, a pioneer in the aerospace sector specializing in next-generation electric propulsion (EP) solutions, has successfully secured significant capital to bolster its market position. With a total funding accumulation of $33M, the company continues to demonstrate robust investor confidence. The most recent financing round, totaling $0, underscores the firm's ongoing commitment to scaling its proprietary radio-frequency thruster (RFT) technology for the rapidly expanding small satellite market.

This latest injection of capital arrives as the company transitions from initial research and development into a phase of high-volume manufacturing and operational deployment. By securing this backing, Phase Four is well-positioned to meet the increasing demands of satellite constellation operators who require cost-effective, mass-manufacturable, and propellant-agnostic propulsion systems.

What is Phase Four?

Phase Four
ManufacturingAerospace & Defense

Founded in 2015, Phase Four has established itself as a disruptive force in the space industry. The company's core innovation, the radio-frequency thruster (RFT), represents a fundamental shift in satellite propulsion architecture. By prioritizing miniaturized power electronics and high-performance capabilities, Phase Four addresses the critical bottlenecks faced by small satellite operators. The successful flight heritage of the Maxwell turn-key propulsion system in 2021 served as a pivotal milestone, validating the company's technical roadmap and its ability to deliver reliable, flight-ready hardware to a competitive global market.

How much funding has Phase Four raised?

Phase Four has raised a total of $33M across 4 funding rounds:

2020

Debt

$350K

2021

Debt

$359K

Series B

$26M

2024

Other Financing Round

$6.3M

Debt (2020): $350K with participation from PPP

Debt (2021): $359K led by PPP

Series B (2021): $26M supported by New Science Ventures

Other Financing Round (2024): $6.3M featuring Leonid

Key Investors in Phase Four

Leonid

Leonid Capital Partners is a private equity firm focused on middle-market businesses, providing growth capital and strategic investments to drive long-term value creation.

New Science Ventures

New Science Ventures is a venture capital firm that invests in early and late-stage companies utilizing novel scientific approaches in life sciences and information technology.

PPP

Public-Private Partnership

What's next for Phase Four?

Looking ahead, the strategic deployment of this recent capital will likely focus on scaling production capacity to support the growing backlog of satellite constellation projects. As the industry shifts toward more frequent, high-density launches, Phase Four's ability to provide scalable, efficient propulsion will be a key differentiator. The company is expected to leverage this financial runway to further refine its RFT architecture, potentially exploring new propellant configurations and enhancing the integration capabilities of its Maxwell system. By maintaining its focus on performance and cost-efficiency, Phase Four is poised to remain a critical supplier in the evolving landscape of orbital logistics and space infrastructure.

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Frequently Asked Questions Regarding Phase Four Financial Insights

What are the most recent funding rounds that Phase Four has completed, and what were the funding rounds?
Phase Four has recently completed 3 funding rounds: Other Financing Round on Mar 13, 2024, Series B on Jun 11, 2021, Debt on Mar 25, 2021.
What is the total amount of funding Phase Four has raised to date?
Phase Four has raised a total of $33M in funding to date.
How many funding rounds has Phase Four completed?
Phase Four has completed 3 funding rounds.
How much funding did Phase Four raise in its most recent funding round?
Phase Four raised $6.3M in its most recent funding round.
Who are the lead investors in Phase Four's latest funding round?
The lead investor in Phase Four's latest funding round was Leonid. To access investor data and explore similar companies, sign up for ZoomInfo.
Which was the largest funding round in Phase Four's history?
The largest funding round in Phase Four's history was $26M.
See more information about Phase Four