Phase Four is a provider of electric propulsion (EP) for small satellites.
Phase Four's investors include Lightspeed Venture Partners, Alumni Ventures, Leonid Capital Partners, New Science Ventures, Artemis Capital Partners.
Phase Four is headquartered in El Segundo, United States.
Phase Four is a provider of electric propulsion (EP) for small satellites.
Phase Four is at the Series C stage.
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"Phase Four — Funding & Investors." VCBacked, January 9, 2025, https://www.vcbacked.co/company/phase-four. Accessed August 14, 2026.
VCBacked. (2025). Phase Four — Funding & Investors. Retrieved August 14, 2026, from https://www.vcbacked.co/company/phase-four
{{cite web |title=Phase Four — Funding & Investors |url=https://www.vcbacked.co/company/phase-four |website=VCBacked |access-date=August 14, 2026}}Profile data sourced and verified per the VCbacked methodology · Last funding round dated