Mark Cuban invested $500,000 in Relativity Space after receiving a cold email from founder Tim Ellis, an ex-Blue Origin intern, in Dallas. The initial investment was made without any in-person meetings, and Cuban has since put in several million dollars. Today, Relativity Space is valued at $4 billion, positioning itself as a competitor to SpaceX, according to fortune.com.
The relationship between Cuban and Relativity Space’s founders developed entirely over email, with Cuban admitting he had no expertise in space technology but wanted to support the team. Ellis, who previously led Blue Origin’s metal 3D-printing division, and his co-founders reached out to Cuban with their vision for a new space company. Cuban credited the founders’ intelligence and hard work for the company’s success rather than his investment alone.
Relativity Space’s rise reflects growing interest in private space ventures challenging established players like SpaceX and Blue Origin. The company’s focus on 3D-printed rockets offers a unique approach within the aerospace sector. Cuban’s early backing highlights how unconventional investments can yield substantial returns in emerging industries, with Relativity now among the most valuable private space startups.
Relativity Space’s valuation milestone comes nearly two years after Cuban’s initial email investment. The company continues to develop its rocket technology and expand its market presence, with Cuban’s total investment reaching several million dollars, as detailed in a September 2024 interview with Cuban on fortune.com.