Katherina Bornefeld is a drummer and vocalist, know as the drummer in The Ex since 1984.She has also been in the groups Ex Orkest, Ig Henneman Tentet, and Katjonband.

"Terrie Hessels, AKA Terrie Ex, is an improvising guitarist from the Netherlands. In addition to his work as an improviser, he's a founding member of the iconic Dutch punk band The Ex. Terrie founded the Terp label to document the work of Ethiopian musicians as well as his own improvising projects."

"Andy Moor [aka Andy Ex] (born 1962) began his musical life in Edinburgh, Scotland playing guitar with Dog Faced Hermans, an eclectic group that mixed post-punk energy with traditional tunes and improvisations. In 1990 he moved to the Netherlands after an invitation to join Dutch band The Ex. In 1995 he began another group, Kletka Red with Tony Buck Joe Williamson and Leonid Soybelman, fusing traditional klezmer, Greek and Russian songs with their own styles of playing.

Moor's own background is rooted in the post-punk Britain of the 1980s, but in more recent years he has collaborated with many musicians from varied backgrounds and disciplines. Many of these collaborations are duos, with amongst others Cypriot composer Yannis Kyriakides with whom he performs a set of rebetika songs (urban Greek tunes from the 1920s and 1930s), French sound poet Anne James Chaton, ex bass player from Dog Faced Hermans Colin Mclean, who now works with electronic music and live sampling, Brooklyn-based DJ, producer and writer DJ /rupture, and Lebanese Paris-based saxophonist Christine Abdelnour.

Moor has also begun composing soundtracks for films, working former Dog Faced Hermans vocalist-turned filmmaker Marion Coutts, with Iranian filmmaker Bani Khoshnoudi and US experimental filmmaker Jem Cohen. His latest projects include a quartet with Ken Vandermark, Terrie Ex and Paal Nilssen-Love called Lean Left, a trio with Berlin-based artists and musician Alva Noto and Anne James Chaton called Decade, and a trio project with Anne James Chaton and Thurston Moore called Heretics. In 2013 he began a duo project with John Butcher. Moor lives in Amsterdam at present and continues to be a full-time member of The Ex. He is a founding member of the music label Unsounds, in Amsterdam, with Yannis Kyriakides and Isabelle Vigier."

Arnold de Boer is a Netherlands vocalist, guitar and keyboard player, known for his solo project Zea, and as a guitarist and vocalist in The Ex.