Adult DVD Studios
- K Beech dreamland midnight
- K-Beech Video
- K.C. Sales
- Kalan Lp.
- Kama Sutra X
- Kamikaze Entertainment
- Kandi Peach Productions
- Karnova
- Karups Private Collection
- Katie Banks
- Katoey Ladyboy
- Kelly Madison Productions
- Kelly Shibari Ent.
- Kennston Diamond Feature
- Kheper Games
- Kick Ass
- Kiiroo Bv
- Killer Bea
- Killerporn
- Kim Chambers Production
- Kim Christy
- Kimberly West
- King Midas
- King Productions
- Kingman Industries, Inc
- Kink Men
- Kink Video
- Kink-O-Rama
- Kink.com
- Kinkkrew
- Kinklab
- Kinky Curious
- Kinky Spa
- Kinkyspa.com
- Kiss Condoms
- Kitty
- Klimaxx
- Knight Patrol
- Knight Storm Films
- Knob Ryder
- Knock Out
- Knotty Ties
- Koch Entertainment
- Koch Releasing
- Kokeshi
- Kotengu
- KSEX
- Kshara