In 1997, Greenwood participated in a campaign to encourage students from
state schools to apply for his alma mater,
Cambridge University. In 2004, Greenwood participated on a panel in the annual
sixth-form conference run by
Radley College in collaboration with
School of St Helen and St Katharine, speaking about
digital rights management. Greenwood contributed bass to two soundtracks by his brother Jonny,
Bodysong (2003) and
Inherent Vice, and to the soundtrack for the 2008 film
Woodpecker. He played bass on the albums
Amir (2018) and
Sahar (2022) by the Belgian-Egyptian singer
Tamino, the album
''World's Strongest Man (2018) by
Gaz Coombes, and on "
Brasil" from
Earth'' (2020), the debut solo album by the Radiohead guitarist
Ed O'Brien. He contributed beat programming to Yorke's song "Hearing Damage" from the
soundtrack to The Twilight Saga: New Moon, and on "Guess Again!" from Yorke's album ''
Tomorrow's Modern Boxes'' (2014). In 2013, he soundtracked a
Dries van Noten runway show, performing solo bass guitar. In 2018, he reviewed
Michael Palin's book
Erebus: The Story of a Ship for the
Spectator. In late 2022, Greenwood toured Australia as part of
Nick Cave and
Warren Ellis's band. He appeared on their 2023 live album
Australian Carnage. Greenwood joined Cave's North American tour in September 2023, and contributed bass to the 2024 album
Wild God by
Nick Cave and the Bad Seeds. He joined Cave and the Bad Seeds on their 2024 tour after their bassist,
Martyn P. Casey, fell ill. That October, Greenwood published a book,
How to Disappear: A Portrait of Radiohead, comprising his photographs of Radiohead taken between 2003 and 2016. On March 18, 2026, Greenwood performed as part of the house band at the
Barbican Centre, London, for the release of the
Marianne Faithfull documentary
Broken English. ==Personal life==