Name  | active from | active to | |
| Koubek, Vaclav | | |  |
| Koubkova, Jana | 1970 | | |
| Koudelova, Vlasta | | | |
| Kovarik, Miroslav | | | |
| Kovarik, Zdenek | | | |
| Kozelska, Zita | 1984 | | |
| Krabat | 1982 | 1984 | |
| Krabathor | 1988 | | |
| Krajanci | | | |
| Krajina Ro | 2020 | | |
| Krakatit | | | |
| Krakatit (CZ) | 1976 | | |
| Kral, Ivan | 1964 | | |
| Kralova, Marcela | 1973 | | |
| Krasne nove stroje | 1982 | | |
| Kratke spojeni | 1987 | 1988 | |
| Kratky Proces | 1987 | | |
| Kratochvil-Ackerman | | | |
| Kratochvil-Ackerman-Havel | | | |
| Kratochvil, Martin | | | |
| Kratochvilova, Jana | 1973 | | |
| Krausberry | 1984 | | |
| Krevel | 1987 | | |
| Krevel | 1990 | 1992 | |
| Kreyson | 1989 | 1994 | |
| Krch-off band | 2006 | | |
| Kristina | 2007 | | |
| Kriticka situace | 1988 | 1996 | |
| Krless | | | |
| Krobova, Sylvie | 1990 | | |
