Short answers, pulled from the story.
Pink Floyd formed in 1965 with founding members Roger Waters, Nick Mason, Richard Wright, and Syd Barrett. The group initially played under the name Sigma 6 before evolving into the Pink Floyd Sound by late 1965.
Syd Barrett left Pink Floyd due to mental deterioration and erratic behavior caused by regular LSD use. His departure was announced by Blackhill Enterprises on the 6th of April 1968 after he agreed to leave in early March 1968.
The Dark Side of the Moon became the world's third best-selling album after its release in March 1973. It sold more than 45 million copies worldwide and remained on the Billboard Top LPs & Tape chart for more than fourteen years.
Pink Floyd performed together for the first time in more than 24 years on the 2nd of July 2005 at the Live 8 benefit concert in Hyde Park, London. The reunion was arranged by Bob Geldof and included all four surviving members of the band.
Pink Floyd agreed to sell their catalogue to Sony Music for approximately $400 million in October 2024. The sale included rights to recordings and merchandise but excluded songwriting rights.
The soundtrack album for the 4K restoration of Pink Floyd: Live at Pompeii was released on the 2nd of May 2025. It became Pink Floyd's seventh UK number-one album.