Sierra Space Closes $550 Million in Series C Round, with a Valuation of $8 Billion

Sierra Space, defining the new era of space defense technology, led by Dan Jablonsky and the team, has raised $550 million in equity investment led by LuminArx Capital Management (“LuminArx Capital”), a global alternative investment manager, with participation from existing investors. The financing values the company at $8 billion post-money. Sierra Space’s investors include General Atlantic, Coatue, Moore Strategic Ventures, and Andalusian Private Capital, among others.

With this new capital, Sierra Space will expand production capacity, advance differentiated solutions for national security space efforts, and strengthen its position to secure new contracts and pursue growth beyond current satellite and spacecraft programs.

Sierra Space has undergone a strategic transformation since 2021, strengthening alignment with national security customer needs and advancing solutions that support American space and defense leadership, according to Board Chair Fatih Ozmen. Confidence from new equity investor LuminArx Capital reflects a strong belief in the company’s future growth trajectory.

Co-founder and Chief Investment Officer Min Htoo stated that Sierra Space stands out in the defense-technology space sector due to its team, technical expertise, and execution track record, with the partnership aimed at accelerating growth and expanding mission-critical national security capabilities.

Sierra Space has reached an important inflection point, according to Chief Executive Officer Dan Jablonsky, with investor confidence, customer demand, and operational readiness aligned to support the company’s scaling. The focus remains on expanding proven defense and civil capabilities while delivering mission-critical solutions with speed, reliability, and consistency.

Sierra Space has participated in more than 500 missions and carries over 30 years of spaceflight heritage. Over the past five years, several major milestones have been achieved, including:

• Key contract awards, including a $450 million program to build multiple satellites for a national security customer and a Space Development Agency Tranche 2 Tracking Layer contract with a potential value of $740 million to develop 18 missile warning, tracking, and fire-control satellites.

• Contract awards from all eight space procurement agencies across the U.S. Department of Defense and the Intelligence Community.

• Completion of a new power station facility used to manufacture high-rate solar arrays for critical satellite missions.

• Completion of Critical Design Reviews for two major national security satellite programs in 2025, alongside manufacturing and assembly milestones for the Dream Chaser spaceplane, with a demonstration flight planned for late 2026. 🚀

Moelis & Company served as the exclusive placement agent to Sierra Space for the Series C financing transaction.