| K | — | 1982 | Original Production | — |
| K Records | United States | January 1, 1982 | — | 1 |
| K-tel | Canada | January 1, 1968 | — | 1 |
| Kabad | United States | June 7, 1990 | — | — |
| Kabad Entertainment | United States | January 1, 2019 | — | — |
| Kabad Music Group | United States | January 1, 2019 | — | — |
| KADOKAWA | Japan | 2014 | Imprint | — |
| Kahvi Collective | United Kingdom | 1999 | Original Production | — |
| Kaiku Entertainment | Finland | January 1, 2007 | — | 3 |
| KAIROS | — | 1999 | Original Production | — |
| Kakao Entertainment | South Korea | March 2, 2021 | Publisher | — |
| Kakao Entertainment | South Korea | July 20, 2010 | — | 1 |
| Kakao M | South Korea | January 1, 2018 | — | 4 |
| KAKUBARHYTHM | Japan | January 1, 2002 | — | — |
| Kama Digital Entertainment | South Korea | October 1, 1988 | — | — |
| Kama Sutra | United States | January 1, 1964 | — | 1 |
| Kanine Records | United States | January 1, 2002 | — | 1 |
| Kannibalen Records | Canada | 2011 | Original Production | — |
| KAO!INC. | Taiwan | July 1, 2005 | — | — |
| Kapa Records | Slovenia | January 1, 1998 | — | 1 |
| Kapp Records | United States | 1954 | Original Production | — |
| Kapp Records | United States | January 1, 1954 | — | 3 |
| Kaptein Sabeltann AS | Norway | January 1, 2004 | — | — |
| KaraokeNova | — | February 4, 2021 | Distributor | — |
| KARENT | Japan | 2008 | Imprint | — |
| Karisma & Dark Essence Records | Norway | January 1, 2004 | — | — |
| Karusell | Sweden | January 1, 1953 | — | 1 |
| Karussell | Germany | 1952 | — | — |
| Katakombi | Finland | January 1, 2018 | — | 1 |
| Kaushik Films & Entertainment Company | India | August 3, 2021 | — | — |
| Keeled Scales | United States | January 1, 2014 | — | 1 |
| Keltia Musique | France | 1978 | Original Production | — |
| Kemado Records | United States | January 1, 2002 | — | 1 |
| Kemosabe | United States | November 2011 | Imprint | — |
| Key Sounds Label | Japan | 2001 | Imprint | — |
| Key Sounds Label | Japan | January 1, 2001 | — | 5 |
| KeyEast | South Korea | January 1, 1996 | — | — |
| Khanti Records | France | January 1, 2013 | — | — |
| Ki/oon | Japan | 1992 | Imprint | — |
| KICKER® | France | — | Original Production | — |
| Kiddinx | — | 2000 | Original Production | — |
| KIDinaKORNER | United States | 2011 | Imprint | — |
| Kill Rock Stars | United States | 1991 | Original Production | — |
| Kill Rock Stars | United States | January 1, 1991 | — | 1 |
| Kilomaître Production | France | February 1, 1997 | — | — |
| KING | Japan | January 1931 | Original Production | — |
| KING AMUSEMENT CREATIVE | Japan | August 2017 | Imprint | — |
| King Amusement Creative | Japan | August 1, 2017 | — | 2 |
| King Records | United States | 1943 | Original Production | — |
| King Records | Japan | January 1, 1931 | — | 7 |
| Kinne Piano | Norway | January 1, 2007 | — | — |
| Kioon Music | Japan | January 1, 1992 | — | 8 |
| Kirkelig Kulturverksted | — | November 13, 1974 | Production | — |
| Kitchenware Records | United Kingdom | January 1, 1982 | — | 1 |
| Kitsuné | France | 2002 | Original Production | — |
| Kitty Records | Japan | 1972 | Imprint | — |
| KM Culture | South Korea | June 4, 1999 | — | — |
| Knitting Factory Works | United States | January 1, 1990 | — | 2 |
| KOCH International | — | 1975 | Production | — |
| Koch International | Austria | January 1, 1975 | — | 1 |
| KOCH Records | United States | June 1, 1999 | Original Production | — |
| Koch Records | United States | January 1, 1987 | — | 2 |
| Koch Universal | Germany | — | Imprint | — |
| Koch Universal Music | — | 2002 | Imprint | — |
| Kompakt | Germany | — | Original Production | — |
| Kompakt | Germany | January 1, 1998 | — | 1 |
| Kompakt Extra | Germany | — | Imprint | — |
| KONAMI | Japan | 1989 | Imprint | — |
| Konami Digital Entertainment | Japan | March 31, 2006 | — | — |
| Konkurrent Onafhankelijk Muziekbedrijf | Netherlands | January 1, 1985 | — | — |
| Konnect Entertainment | South Korea | June 5, 2019 | — | — |
| Kontor Records | Germany | 1996 | Original Production | — |
| Kontor Records | Germany | January 1, 1996 | — | 6 |
| Konvict Muzik | United States | January 1, 2005 | — | 1 |
| Kosinus | France | — | Original Production | — |
| KOZ Entertainment | South Korea | November 1, 2018 | — | 1 |
| KPM Music | United Kingdom | — | Original Production | — |
| KQ Entertainment | South Korea | January 1, 2016 | — | — |
| Kranky Records | United States | January 1, 1993 | — | 1 |
| Kråklund Records | Finland | January 1, 1991 | — | — |
| Kscope | United Kingdom | 2008 | Imprint | — |
| Kscope | United Kingdom | January 1, 1990 | — | 4 |
| KT Genie Music | South Korea | January 1, 1991 | — | 1 |
| Kung Fu Records | United States | January 1, 1996 | — | 1 |
| Kvadro-Disk | Russia | January 1, 1995 | — | 1 |
| K‐tel | Canada | 1968 | Reissue Production | — |