Stratolaunch

Stratolaunch LLC is a private American aerospace company providing high-speed flight test services. It was founded in 2011 to develop a new air-launched space transportation system, with its corporate headquarters in Seattle. The company and development project were announced in December 2011 by Microsoft co-founder Paul Allen and Scaled Composites founder Burt Rutan, who had previously collaborated on SpaceShipOne. The company was acquired in 2019 by Cerberus Capital Management and has continued privately funded, operating as a non-traditional defense contractor. via Wikipedia ↗