Nextbigfuture has interviewed Ryan Weed, CEO of Positron Dynamics. Positron Dynamics is developing antimatter catalyzed fusion propulsion which they will first demonstrate in a cubesat launch. They are getting around the still mostly unsolved difficulties of storing antimatter. They are doing this by using Sodium 22 isotopes.

Positron Dynamics has previously received a lot of press coverage when it was funded by the Thiel Breakthrough foundation to work on antimatter.