O Entertainment
- Country
- United States
- Founded
- 1990
- Animated series
- 1
Ocean Productions
- Founded
- 1994
- Animated series
- 1
- Format
- business
Odolttogi (Animation Studio)
- Country
- South Korea
- Founded
- April 1, 1997
- Format
- animation studio
Oh! Production
- Country
- Japan
- Founded
- April 1, 2002
- Format
- animation studio
Okuruto Noboru
- Country
- Japan
- Founded
- December 1, 2017
- Animated series
- 7
OLM, Inc.
- Country
- Japan
- Founded
- October 3, 1990
- Animated series
- 67
One and a half
- Country
- Cyprus
- Founded
- 2018
- Format
- animation studio
Orange
- Country
- Japan
- Founded
- May 1, 2004
- Animated series
- 9
Ordet
- Country
- Japan
- Founded
- August 2007
- Animated series
- 2
Origin Animation
- Country
- People's Republic of China
- Founded
- July 14, 2010
- Format
- film studio, animation studio, film production company, film and television production company, television production company, production company
Original Film
- Country
- United States
- Founded
- 1997
- Animated series
- 2
Original Force, Ltd.
- Country
- People's Republic of China
- Founded
- December 22, 2010
- Animated series
- 3
Oskar Fischinger
- Country
- German Reich
- Format
- animation studio
- Headquarters
- Friedrichstraße
Outfit7
- Country
- Slovenia
- Founded
- 2009
- Animated series
- 3