Publishers
Every publisher in the catalog, from the majors to single-book imprints.
- Optical Illusion Studios
- Optika Križan
- Optimal
- Optimal; HDK; Göteborgs universitet
- Optimum Wound
- Opuntia Books
- Opus Comics
- Opus Graphics
- Opzij
- Orac
- Oracle Comics
- Oracom
- Oral Roberts Evangelical Association
- Orange Books
- Orange Cone Productions
- Orange Hand
- Orb City Comics
- Orb Publications
- Orbis
- Orbis
- Orbit-Wanted
- Orbita
- Orbital
- Orchard Books
- Ordbilder Media AB
- Ordet
- Ordfront Förlag AB
- Ordfront Galago
- Ordfront; Föreningen Seriefront
- Orell Füssli
- Orgacom
- Organic Comix
- Organic Comix; Original Watts
- Organizator ekon. servis
- Orgcomicart
- Oriental Enterprises
- Orientmen i spółka
- Origin House Comics
- Original Comix
- Original Syndicate Press
- Original Watts
- Original; Linda Shamma Östrand
- Origo Press
- Orin Books
- Orion
- Orion
- Orion Books
- Orix
- Orlanda Verlag
- Orlok Press
- Orosdi-Back
- Orphan Underground Comics
- Ortega Colunga
- Osborne Enterprises
- Oscar Caesar
- Oscaria
- Osinga
- Oskar Aspman
- Oskar Aspman; Mattias Elftorp; Jacob Kindstedt; Daniel Novakovic
- Oslo Comics Expo
- Oslo Tegneserieforum
- Oslo og Akershus Eiendomsmeglerforening
- Oslobođenje
- Osprey Publishing
- Ossenbühl
- Ossm Comics
- Ostfalia-Verlag
- Osuuskunta Käyttökuva
- Ota A/S
- Otava
- Other Comics
- Oto Shobo
- Otokar Keršovani
- Otomo-san
- Ototo
- Ottenheimer Publishers
- Otter Press
- Otter-Barry Books
- Otto Maier Verlag
- Otto Press
- Otto Schneider
- Otto Simon
- Ouest-France
- Oulun sarjakuvaseura
- Our Publishing Co.
- Our Publishing Co.; Toytown; Patches
- Our Sunday Visitor, Inc.
- Out Of The Blue Productions
- Out There Press
- Out of the Cellar
- Out of the Past Comics
- Outdoor Power Equipment Institute
- Outerbridge & Dienstfrey
- Outerealm Comix
- Outfit, The
- Outland
- Outland Entertainment
- Outlander Comics
- Outlaw Comics
- Outlaw comics; Mats Källblad
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