Sonora Productions
Specializes in Classical and Sacred music.
http://www.sonoraproductions.com/index.html

Stieglitz
(Classical Label of Pink Tontraeger) Rarities; online shopping. [German/English]
http://www.stieglitz-klassik-musik-label.de

Symposium Records
Re-issues recordings from the late 19th and early 20th centuries.
http://www.symposiumrecords.co.uk

Somm Recordings
Choral and instrumental music. Recordings of British conductor Sir Thomas Beecham. Online catalogue with MP3 samples.
http://www.somm-recordings.demon.co.uk

Sherman Records
Audio and video content licensing including Libretto Classics series.
http://www.shermanrecords.com/

Selene
Polish label, with a focus on Polish composers and performers.
http://members.aol.com/seleneusa/

Sotone
Releases of French Horn performances.
http://www.sotone.com

Sound Dynamics Associates
Recording and reissuing Classical music performances and recordings on CD.
http://sd-associates.com/

Sanctuary Classics
Specializing in contemporary Classical music.
http://www.sanctuaryclassics.com/homepage.php?section=0&subsection=0&gotFlash6=true

Sony Classical
Classical, crossover, and soundtrack music label. Features sound clips, tour schedules, and upcoming releases.
http://www.sonybmgmasterworks.com/

Supraphon
A Czech company devoted to spread music of the genre by local artists. Features a catalogue composed by new recordings as well as digitally remastered re-editions of historic recordings.
http://www.supraphon.com/