What is Apollo Fusion?
Apollo Fusion specializes in the design and manufacturing of state-of-the-art Hall thruster propulsion systems. Founded by serial entrepreneur Mike Cassidy, the firm leverages a team with extensive aerospace heritage, having contributed to systems currently operational on over 1,000 satellites. The company has successfully industrialized its production processes, achieving the capacity to deliver dozens of propulsion units monthly. This operational maturity allows Apollo Fusion to serve a diverse client base, ranging from government agencies to commercial satellite constellations, positioning the firm as a vital supplier in the rapidly expanding space logistics market.
How much funding has Apollo Fusion raised?
Apollo Fusion has raised a total of $18M across 2 funding rounds:
Series A
$8M
Series B
$10M
Series A (2016): $8M, investors not publicly disclosed
Series B (2018): $10M led by Greylock Partners
Key Investors in Apollo Fusion
Greylock Partners
A global venture capital firm managing over $2.2 billion, focused on supporting exceptional entrepreneurs across all stages to build category-leading technology companies.
Undisclosed Investor
Undisclosed investor participating in the funding round.
Undisclosed Investor
Undisclosed investor participating in the funding round.
What's next for Apollo Fusion?
With the recent capital injection, Apollo Fusion is well-positioned to scale its manufacturing footprint and further refine its propulsion architectures. The strategic focus will likely shift toward optimizing supply chain resilience and expanding market share within the burgeoning small-satellite and mega-constellation sectors. As the demand for orbital mobility increases, the company's ability to deliver high-performance, flight-proven hardware at scale will be a key differentiator. Future growth will likely involve deepening partnerships with prime contractors and government entities to integrate their propulsion solutions into next-generation satellite platforms, thereby cementing their role as a cornerstone of space-based infrastructure.
See full Apollo Fusion company page
