ThinkOrbital Raises Seed Funding Led by TFX Capital to Advance In-Space Assembly and Orbital Defense Technologies

ThinkOrbital, a U.S.-based space infrastructure company focused on autonomous in-space assembly, welding and orbital defense technologies, has closed a seed funding round to accelerate development of its next-generation capabilities for national security and commercial space missions. The round was led by TFX Capital, an investment firm specializing in early-stage defense and space technologies, marking a significant funding milestone for the company as it advances technologies designed to build and maintain infrastructure directly in orbit.

Founded in 2021 and headquartered in Colorado, ThinkOrbital is co-led by Co-Founder and Chief Executive Officer Lee Rosen, a retired U.S. Air Force colonel and former SpaceX executive, and Co-Founder and Chief Technology Officer Dr. Vojtech Holub. The company’s mission centers on enabling scalable space infrastructure through robotic construction, in-space welding, inspection and sensing technologies that address the growing complexity and strategic importance of Earth’s orbital environment.

The seed funding from TFX Capital will support the continued development of ThinkOrbital’s core technology portfolio, including its space-to-space X-ray imaging system designed to inspect spacecraft and orbital structures. This capability is intended to provide high-resolution insight into the condition, configuration and potential damage of space assets, supporting both space domain awareness and on-orbit defense applications. ThinkOrbital has announced plans to conduct demonstration missions using this technology in 2026, underscoring how the new capital will be applied toward near-term testing and validation.

The funding round builds on a foundation of earlier non-dilutive capital secured through federal and state programs. ThinkOrbital has received multiple contracts and awards from U.S. defense innovation organizations, including an AFWERX Phase I STTR contract focused on orbital staging concepts and a SpaceWERX SBIR Phase II contract supporting the advancement of its spacecraft inspection technologies. These awards highlight continued government interest in the company’s approach to in-space operations and defense-oriented capabilities.

At the state level, ThinkOrbital has also received funding from Colorado’s Advanced Industries Accelerator Program, which awarded the company $250,000 to support development of in-space welding, debris-free cutting, additive manufacturing and multi-sensor inspection systems. This funding has contributed to the design and testing of technologies intended to enable large-scale orbital construction and servicing missions that are not feasible using Earth-based assembly alone.

In addition to TFX Capital, ThinkOrbital has attracted early support from venture groups such as Pathbreaker Ventures and 7percent Ventures, which focus on deep-tech and frontier technology investments. These investors and partners have supported the company’s early growth and helped position it within the defense and aerospace innovation ecosystem.

Combined with venture capital, government contracts and grants, ThinkOrbital’s funding to date exceeds several million dollars, providing the financial foundation needed to achieve key technical milestones. One such milestone includes the successful demonstration of autonomous in-space welding technology, validating the company’s ability to perform precision construction tasks in orbit and reinforcing the feasibility of its long-term vision for orbital infrastructure.

The seed funding will enable ThinkOrbital to expand its engineering and operations teams, increase testing cadence and advance multiple technology programs in parallel. The company’s roadmap includes capabilities for on-orbit servicing, inspection and repair, as well as platforms for constructing large structures such as space stations, manufacturing facilities and other infrastructure that must be assembled beyond Earth’s gravity well.

With backing from TFX Capital and other early investors, ThinkOrbital is positioned to play a growing role in the evolving space economy. As governments and commercial operators increasingly rely on space-based assets for communications, security and exploration, the ability to build, inspect and maintain infrastructure in orbit is becoming essential. ThinkOrbital’s funding and technological progress reflect the rising importance of space infrastructure startups in shaping the future of orbital operations and space security.