Venus is the planet that has no satellite.
A satellite, in this context, refers to a natural object that orbits a planet. For example, Earth has one natural satellite, the Moon, which orbits around it.
While Venus is the second planet from the sun and similar in size and composition to Earth, it does not have any natural satellite orbiting around it. In contrast, the other three planets listed - Uranus, Neptune, and Jupiter - all have several known natural satellites in orbit around them.