Although I don't know much about UP Aerospace, from what I do know, I would come to the conclusion they are not the large corporate presence of Boeing and Sea Launch. But, a group if individuals who financed a company that is now in position to support flights into space, and hopefully see them evolve to full fledged LEO and beyond. Their current series of rockets, are based on solid rocket fuel, and fly a "ballistic" sounding rocket style trajectory, albeit, into space. While it appears the Solid rocket motor, is the entire lower-half of the vehicle, the upper-half is recoverable, and probably the payload bays, re-usable. I would infer this vehicle hits around mach 5. Also, believe the impulse is around an "S" sized rocket motor, which has an impulse of between 327,680.01-655,360.00 N-s. (that is a big range, but gives you a good minimum... for the huge amount of power)
This last SL-6 Mission, provided a unique opportunity. The rocketry association my family are members of, flew membership cards into space. I am quite jealous that I did not get one for my self, I on the other hand wanted my son to feel like he had something truly special, and that others don't get. So not to cheapen his experience, I elected to not participate. However, I will show it off... Here is his "card that has been in space"