According to Nikkei, Kadokawa Group Holdings has announced that they have incorporated Media Factory as a subsidiary of the holdings on October 12th. As a result, most of the major light novel publishers are now affiliated with Kadokawa Group.
Light novel publishers belonging to Kadokawa Group
Dengeki Bunko
Shakugan no Shana
Ore no Imouto ga Konnani Kawaii Wake ga Nai
Durarara!!
Fujimi Fantasia Bunko
Full Metal Panic!
Seitokai no Ichizon
Kore wa Zombie Desu ka?
Kadokawa Sneaker Bunko
Suzumiya Haruhi no Yuuutsu
Rental Magica
Dantalian no Shoka
Kadokawa Beans Bunko
Saiunkoku Monogatari
Gosick
Uragiri wa Boku no Namae wo Shitteiru
Famitsu Bunko
Baka to Test to Shoukanjuu
Bungaku Shoujo
Yoshinaga-san’chi no Gargoyle
Media Factory Bunko J
IS: Infinite Stratos
Zero no Tsukaima
Hidan no Aria
Light novel publishers unrelated to Kadokawa
Shueisha Super Dash Bunko
Kure-nai
Yokuwakaru Gendaimahou
Mayoi Neko Overrun!
GA Bunko
Haiyore! Nyaruko-san
Shinkyoku Soukai Polyphonica
GaGaGa Bunko
Jinrui wa Suitai Shimashita
Toaru Hikuushi e no Tsuioku
HJ Bunko
Ichiban Ushiro no Daimaou
Source: Nikkei (PDF file)
