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|Nigel Rennard (Founder)|
|Products||DVD, Blu-ray Disc, Digital Video|
Founder and managing director Nigel Rennard started Siren in 1987 as a music distribution company, and expanded to include VHS distribution in 1994, starting with the distribution of Anime from Manga Entertainment's UK division. It then expanded to acquiring Anime like Astro Boy and Pokémon. It expanded to distribution of Arthouse, Horror and Asian Cinema. In 2001 Siren was no longer a home entertainment distributor and is now solely an acquisition company.
In the early 2000s, Siren repositioned itself as a specialist licensing company. Distribution was outsourced to Shock Records. At the beginning of 2007 Siren parted ways with Shock Records, teaming up with independent sales and distribution company Gryphon Entertainment.
- Alejandro Jodorowsky's "The Holy Mountain", "Fando y Lis" and "El Topo"
- Ruggero Deodato's "Cannibal Holocaust"
- Studio 4°C's "Genius Party"  and "Genius Party Beyond"
- Selected titles from Sentai Filmworks
- Angel Beats!
- Clannad/Clannad After Story
- Clannad (film)
- Ghost Hound
- Golgo 13
- Heaven's Memo Pad
- Intrigue in the Bakumatsu – Irohanihoheto
- Legends of the Dark King
- Nadia: The Secret of Blue Water
- Night Raid 1931
- Princess Resurrection
- Tears to Tiara
- The Book of Bantorra
- Selected titles from Funimation
- A Lull in the Sea
- Ayakashi: Samurai Horror Tales
- Black Rock Shooter
- Chi's Sweet Home
- Dennō Coil
- Higurashi When They Cry (Season 1 & 2)
- House of Five Leaves
- Iria: Zeiram the Animation
- Ninja Nonsense
- Now and Then, Here and There
- Parasite Dolls
- The Tatami Galaxy
- Thermae Romae
- Usagi Drop
- Welcome to Dr. Irabu's Office
- Welcome to the N.H.K.
- X (TV)
- Tiger & Bunny
- Tiger & Bunny -The Beginning-
- Hakaba Kitaro
- Queen's Blade
- "Siren Visual". Siren News. Siren Visual. 2009-11-04. Retrieved 2009-11-20.
- "Siren moves to Gryphon". themusic.com.au. www.themusic.com.au. 2009-11-19. Retrieved 2009-11-19.