Undisclosed investors have contributed upwards of 40% of a planned $500m round for the GV-backed space services provider, according to a securities filing.

SpaceX, the US-based space exploration technology and services provider backed by internet technology conglomerate Alphabet, has raised $214m of a planned $500m, according to a regulatory filing yesterday.

Although the company has not identified the investors, the filing states 15 participants provided the capital, and TechCrunch reported last month financial services group Fidelity was set to lead the $500m round.

Founded in 2002, SpaceX designs, develops and manufactures space exploration vehicles before launching them into space to undertake missions on…