| Horizons Music | — | — |
| Hotflush Recordings | 2003 | — |
| Hudson Music Library | — | 6824 |
| Hut Recordings | 1990 | 3098 |
| Hybrid Music | 2014 | — |
| Hydrogen Dukebox | 14 February 1992 | — |
| Hyperion | 1980 | 7533 |
| ICR | 1981 | — |
| Illuminated Records | — | — |
| Immediate | 1965 | 9 |
| INCredible Records | — | 2868 |
| Independiente | 1997 | — |
| Inferno | — | — |
| Infrared | — | — |
| Insanity Records | — | — |
| Inspected Records | 14 February 2011 | 37363 |
| Integral Records | 7 January 2000 | — |
| Integrity Records | 1 January 1994 | — |
| Internal | — | 7654 |
| Invisible Hands Music | — | — |
| Jackpot | — | — |
| Jagex | 28 April 2000 | — |
| Jeepster Recordings | 1995 | — |
| Jericho | 1998 | — |
| Jezus Factory Records | 2006 | — |
| Juice Records | 1995 | — |
| Jumpin’ & Pumpin’ | 1989 | — |
| Junior Boy’s Own | August 1990 | — |
| Just Another Label | 1992 | — |
| Kahvi Collective | 1999 | — |
| Kickin Records | 1988 | — |
| KLF Communications | 1987 | 9308 |
| Korova | 1979 | 7259 |
| KPM Music | — | 2061 |
| LAB Records | 2007 | — |
| Labello Blanco Recordings | 1990 | — |
| Law & Audio | — | 51025 |
| Leaf | 1994 | 12877 |
| Lex Records | 2001 | — |
| Liberty EMI Records UK | 2001 | 542 |
| Liquid Records | — | — |
| Liquid Sound Design | 1998 | — |
| Live Here Now | 2004 | — |
| Lo Recordings | 1995 | — |
| Loaded Records | 1990 | — |
| Lockjaw Records | 18 May 1997 | — |
| Lojinx | 2004 | 28123 |
| London American Recordings | — | 309 |
| London Records 90 | 1998 | — |
| Loose Torque | 2005 | — |
| Lost Children Net Label | 2003 | — |
| LSO Live | 1999 | — |
| Major Minor | 1966 | — |
| Manifesto | — | — |
| Mantra Recordings | 1995 | 11591 |
| Mega Dodo | 11 May 2011 | — |
| Memphis Industries | 1998 | 13549 |
| Metalheadz | 1994 | — |
| Mighty Force | 1991 | — |
| Millennium Jazz Music | 2003 | — |
| Mixmag | — | — |
| Mo Wax | 1992 | — |
| Modena Records | 28 February 1997 | — |
| Modern Love | 2002 | — |
| Moshi Moshi Records | 1998 | 23175 |
| Mote-Evolver | 2006 | — |
| Mother Records | — | 309 |
| Movie Queen Music | 1 June 2012 | — |
| Moving Shadow | 1991 | 5681 |
| Mr Bongo | 1989 | 12527 |
| MTA Records | 2009 | — |
| Mumble Etc. | 2013 | — |
| Music De Wolfe | 1909 | — |
| Music for Nations | 1983 | 8541 |
| Naim Jazz | 2009 | — |
| Nano Records | — | — |
| Navigator Records | 2007 | — |
| Nebula | — | — |
| Nervous Records | 1978 | 3459 |
| Never Say Die | 2009 | — |
| Night Slugs | 2010 | — |
| Ninja Tune | 1990 | 12885 |
| NMC | 1988 | — |
| No Future | — | — |
| Novamute | 1991 | 5834 |
| NRK Sound Division | 1996 | — |
| Nu Energy | 1998 | — |
| Nu-Directions | 1999 | — |
| Nude Records | 1991 | 5632 |
| Odd Box Records | April 2009 | — |
| Odio Records | 1 January 2018 | — |
| Off Me Nut Records | 2010 | — |
| On-U Sound | — | 8619 |
| One Little Independent Records | 10 June 2020 | 3275 |
| One Little Indian Records | 1985 | 3275 |
| Opal Records | — | — |
| Opal Tapes | 2012 | — |
| Orchid Classics | 2005 | — |
| Panegyric | — | 614 |
| Paradox Music | — | — |