LauncherOne would look much like the current Pegasus system, which is operated by Orbital Sciences Corporation.

BBC: Science & Environment

In 2008, NASA awarded contracts to deliver cargo to the International Space Station to SpaceX and Orbital Sciences Corporation.

FORBES: Dragon Returns To Earth With 'Space Fish,' Toothpaste Research

The Orbital Sciences Corporation (OSC) will shortly test its new Antares rocket before undertaking its own ISS demonstration with a robotic vessel called Cygnus.

BBC: SpaceX capsule returns with safe landing in Pacific