| Magma | s/t | 1970 | 2CD | |
| Magma | Mëkanik Dëstruktïw Kömmandöh | 1973 | CD | ≡ |
| Magma | Live | 1975 | CD | |
| Magma | Attahk | 1976 | CD | |
| Magma | Üdü wüdü | 1976 | CD | |
| Magma | K.A | 2004 | CD | |
| Magnetic Band | s/t | 1980 | 7" | |
| Magyar | Uusiin maisemiin | 1974 | CD | ≡ |
| Majakka ja Perävaunu | s/t | 2005 | 2CD | |
| Majakka ja Perävaunu | s/t | 2006 | CD | |
| Man Doki | People in Room No 8 | 1997 | CD | |
| Man Doki | Soulmates | 2002 | CD | |
| Man Doki | Soulmates. Jazz-cuts | 2003 | CD | |
| Man Doki Soulmates | Absolutely Life | 2003 | CD+DVD | |
| Manço, Barış | 2023 | 1975 | CD | |
| Mandoki | Mother Europe | 1993 | CDS | |
| Mannhai | Spiritraiser | 2003 | CDS | |
| Manogurgeil | Unirytmejä | 2006 | CD | |
| Maraire, Dumisani Abraham | The African Mbira: Music of The Shona People | 1971 | CD | |
| Marin, Marko | Frisbee | 2002 | CD | |
| Marin, Marko | Heijastu, katoa ja ole valmiina | 2005 | CD | |
| Markku Lahtelan Sirkus | Vol. 1 | 2005 | CD | |
| Marko & Myky | Mekonium baby | 2009 | CD | ≡ |
| Mars Volta, The | De-Loused in the Comatorium | 2003 | CD | |
| Mars Volta, The | Frances The Mute | 2005 | CD | |
| Martyn, John | Inside Out | 1973 | CD | |
| Martyn, John | Glorious Fool | 1982 | CD | |
| Masturbaatio | Ääret | 2000 | CD | |
| Matching Mole | Matching Mole's Little Red Record | 1972 | CD | |
| Matching Mole | s/t | 1972 | CD | |
| Matti & Teppo | Kuulut aikaan parhaimpaan / Sinä sen teit | 1984 | 7" | |
| Matti ja Teppo | Kissankultaa / Kai vielä muistat minut kerran | 1970 | 7" | |
| Matti ja Teppo | Antaa mennä vaan / Nyt tunnen mitä rakkaus on | 1975 | 7" | |
| Matti ja Teppo | Kunnon mies / Se toinen nainen | 1983 | 7" | |
| Matti ja Teppo | Kun sua hain / Kivikylän tarina | 1990 | 7" | |
| MC Tuhis | Fiilistelkää Nyt | 2010 | CD | |
| McDonald and Giles | s/t | 1971 | CD | |
| McTell, Blind Willie | King of The Georgia Blues | 2007 | 6CD | |
| MD Howser | Phat Beat Farming | 2008 | CD | |
| MD Howser | More Phat Beats | 2009 | CD | |
| Meisselschieber | Ohikuolija | 2010 | CD | |
| Mellencamp, John / King, Stephen / Burnett, T Bone | Ghost Brothers of Darkland County | 2013 | CD+DVD | ≡ |
| Messiaen, Olivier | Trois petites liturgies de la présence divine / Méditations sur& | 1993 | 2CD | ≡ |
| Metallica | Load | 1996 | CD | |
| Metallica | Reload | 1997 | CD | |
| Meteor Vortex | Cosmic Labyrinth | 2017 | MC | |
| Metsämorfeus | Origin of Specilecties | 2005 | CD | |
| Metsämorfeus | Purkamo | 2006 | CD | |
| Metsämorfues | Draco | 2004 | CD | |
| Mika Huusari Trio | Taavi's Tune | 1996 | CDEP | |
| Mikko Torvisen Viihdeorkesteri | s/t | 2007 | CD | |
| Mikko Torvisen Viihdeorkesteri / Moppi ja Aivokurkiaiset | Ruotsalainen kansanlaulu / Nudismin aakkoset | 2008 | 7" | |
| Milton, Antony | The End of This Short Road | 2006 | CD | |
| Mimmit | Hats hats harakkainen | 2017 | CD | |
| Ming | Versus The Great Satan | 2004 | CD | |
| Mingus, Charles | Mingus Ah Um | 1959 | CD | |
| Mingus, Charles | Mingus Dynasty | 1959 | CD | ≡ |
| Moğollar | Yürüdük durmadan | 2004 | CD | |
| Mona Carita | 20 suosikkia: Rasputin | 1997 | CD | |
| Monolyth & Cobalt with Keijo | s/t | 2013 | CD | |
| Monty Python | …Sings | 1989 | CD | |
| Moody Blues, The | Days of Future Passed | 1967 | CD | ≡ |
| Moody Blues, The | In Search of The Lost Chord | 1968 | CD | ≡ |
| Moody Blues, The | On The Threshold of A Dream | 1969 | CD | |
| Moody Blues, The | To Our Children's Children's Children | 1969 | CD | ≡ |
| Moon Safari | Himlabacken. Vol I | 2013 | CD | |
| Moonlight | The Edge | 1978 | CD | |
| Moppi ja Aivokurkiaiset | Homorakkautta | 2007 | CD | |
| Moppi ja Aivokurkiaiset | s/t | 2008 | CD | |
| Moppi ja Aivokurkiaiset / Mikko Torvisen viihdeorkesteri | Homoreikä / Haistakaapa vittu | 2005 | 7" | |
| Moppi ja Aivokurkiaiset / Mikko Torvisen viihdeorkesteri | Iso ja voimakas mies / Olet kuollut | 2006 | 7" | |
| Morguetology | s/t | 2004 | CD | |
| Morricone, Ennio | For A Few Dollars More / A Fistful of Dollars | 1966 | CD | |
| Morricone, Ennio | The Good, The Bad and The Ugly. Original Motion Picture… | 1966 | CD | |
| Morricone, Ennio | Ruffian, Le. Bande Originale du Film | 1982 | CD | |
| Morricone, Ennio | Film Music 1966–1987 | 1987 | 2CD | |
| Morricone, Ennio | Passion. A Collection of His Best Soundtrack Music | 1996 | CD | |
| Morricone, Ennio | Fistful of Sounds, A | 1999 | 2CD | ≡ |
| Morricone, Ennio | Mission to Mars. Original Score | 2000 | CD | |
| Morricone, Ennio | Crime and Dissonance | 2005 | 2CD | |
| Morricone, Ennio / v/a | Selection of Western Film Music | 1996 | 2CD | |
| Mosaik | Var. IX | 2005 | CD | |
| Motelli Skronkle | Collection | 2000 | CD | |
| Mothers of Invention | 'Tis The Season to Be Jelly. Live in Sweden 1967 | 1991 | CD | |
| Mothers of Invention, The | Freak Out! | 1966 | CD | |
| Mothers of Invention, The | Absolutely Free | 1967 | CD | |
| Mothers of Invention, The | Cruising with Ruben & The Jets | 1968 | CD | |
| Mothers of Invention, The | We're Only in It for The Money | 1968 | CD | |
| Mothers of Invention, The | Uncle Meat | 1969 | 2CD | |
| Mothers of Invention, The | Burnt Weeny Sandwich | 1970 | CD | |
| Mothers of Invention, The | Weasels Ripped My Flesh | 1970 | CD | |
| Mothers of Invention, The | The Ark | 1988 | CD | |
| Mothers of Invention, The | Ahead of Their Time | 1993 | CD | |
| Mothers, The | Fillmore East – June 1971 | 1971 | CD | |
| Mothers, The | Just Another Band from L.A. | 1972 | CD | |
| Motorspandex | Torment Star | 2008 | 7" | |
| Mozart, Wolfgang Amadeus | Taitoa ja mielikuvitusta | 2006 | CD | |
| Mr. Bungle | s/t | 1991 | CD | |
| Mr. Bungle | Disco Volante | 1995 | CD | |
| Mr. Bungle | California | 1999 | CD | |
| Muje, Sasu | Pilvitehdas | 2009 | CDS | |
| Muksut | Viisumi keväästä syksyyn. Kootut laulut 1966–70 | 1994 | 2CD | ≡ |
| Mummi kutoo | s/t | 1975 | CD | ≡ |
| Museo Rosenbach | Zarathustra | 1973 | CD | |
| Musiikkivyöry | Tulemme sokeiksi | 2009 | CD | |
| Mustajärvi, Pate | Miehen tie. Paten soolohitit 1983–2006 | 2006 | 2CD | |
| Mutantea | Sleepy Sounds Electric | 2006 | CD | |
| Mutants, The | Death Cult | 2005 | CD | |
| Mutants, The | Grave Groove | 2007 | CD | |
| Muurahaisen Varjo | Jättiläinen | 1997 | CDEP | |
| My Cat Is An Alien | Secret of The Dancing Snow, The | 2005 | CD | |
| Müller, Fritz | Fritz Müller Rock | 1977 | CD | ≡ |
| Mythos | s/t | 1971 | CD | |
