A Special Breakthrough Prize in Fundamental Physics was awarded to the LIGO Scientific Collaboration for the discovery of gravitational waves on September 14th, 2015.
The prize is described on the organization’s website as:
“The Breakthrough Prize in Fundamental Physics recognizes individuals who have made profound contributions to human knowledge. It is open to all physicists – theoretical, mathematical and experimental – working on the deepest mysteries of the Universe. The prize can be shared among any number of scientists.”
The announcement can be found at https://breakthroughprize.org/News/32