SPACE INDEX COMPANIES INSIGHTS SECTORS PRODUCTS NEWS BLOG ANSWERS RESEARCH ABOUT FOR COMPANIES BUILD / 2026.06.06
Phase Four logo

Phase Four

CLOSED 1-10 EMPLOYEES

Developed electrodeless radio-frequency and multi-mode electric propulsion systems for satellites

NEWS

No news articles yet.

OVERVIEW
Founded 2015
HQ Hawthorne, California
Type Private Company
LEADERSHIP
Steve Kiser
CEO
M. Umair Siddiqui
President & CTO
Simon Halpern
Founder
CLASSIFICATION
DATA QUALITY
CLAIM THIS PROFILE SUGGEST EDITS
Last Verified Jun 3, 2026