| ACT | COUNTRYCNT | EDITIONED | FESTIVALFES |
|---|---|---|---|
| Octavian | GBUnited Kingdom 2019 | | |
| Odd Beholder | CHSwitzerland 2019 | | |
| Ondt Blod | NONorway 2019 | | |
| Our Stories | SKSlovakia 2019 | | |
| OMIRI | PTPortugal 2018 | | |
| One Sentence. Supervisor | CHSwitzerland 2018 | | |
| Onuka | UAUkraine 2017 | | |
| Ortega | NLNetherlands 2017 | | |
| Oaktree | BEBelgium 2016 | | |
| Ocellot | ESSpain 2016 | | |
| Ocho Macho | HUHungary 2016 | | |
| Orange Skyline | NLNetherlands 2016 | | |
| OSCAR | GBUnited Kingdom 2016 | | |
| Óbó | ISIceland 2015 | | |
| Odd Hugo | EEEstonia 2015 | | |
| Ogris Debris | ATAustria 2015 | | |
| O. J. Band | BGBulgaria 2015 | | |
| Oratnitza | BGBulgaria 2015 | | |
| ORCHESTRE TOUT PUISSANT MARCEL DUCHAMP | CHSwitzerland 2015 | | |
| Orla Gartland | IEIreland 2015 | | |
| Oscar & the Wolf | BEBelgium 2015 | | |
| OWLLE | FRFrance 2014 | | |
| Orange Skyline | NLNetherlands 2013 | | |
| Oscar and the Wolf | BEBelgium 2013 | | |
| Olivia Pedroli | CHSwitzerland 2012 | | |
| OqueStrada | PTPortugal 2011 | | |
| Ost & Kjex | NONorway 2011 | | |
| OY | CHSwitzerland 2011 | | |
| Óriás | HUHungary 2010 | | |
| Orka | FOFaroe Islands 2010 | | |
| Ou Est Le Swimming Pool | GBUnited Kingdom 2010 | | |
| Ottoboy the Onemantrashband | NLNetherlands 2009 | | |
| Our Broken Garden | DKDenmark 2009 | | |
| Ólafur Arnalds | ISIceland 2008 | | |
| Olga Kouklaki | GRGreece 2008 | | |
| Op:l Bastards | FIFinland 2008 | | |
| Orgasmic | FRFrance 2008 | | |
| Ozark Henry | BEBelgium 2007 | | |
| Ojos de Brujo | ESSpain 2006 | | |
| OctavePussy | NLNetherlands 2005 | | |
| One Dimensional Man | ITItaly 2005 | | |
| Original | NLNetherlands 2005 | | |
| Orlando | NLNetherlands 2005 | | |
| Overhead | FRFrance 2005 | | |
| O.D. Babe | NLNetherlands 2004 | | |
| Oi Va Voi | GBUnited Kingdom 2004 | | |
| Ojos de Brujo | ESSpain 2003 | | |
| Onakentona | NLNetherlands 2003 | | |
| Orange Black | BEBelgium 2003 | | |
| Over the Moon | NLNetherlands 2001 | |