- KSR Architects
- KSS
- KST Architecture & Interiors
- Kstar New Energy Co., Ltd.
- k-studio
- KSV Krüger Schuberth Vandreike
- kt
- KT Architects
- KT Exclusive GmbH
- KTB Architecture
- KTB Production
- K-Tel Comunication di cristantiello Claudio
- KTK KLIMATECHNIK G.I. Industrial Holding s.p.a.
- KTX archiLAB
- KUATRO CARPETS
- Kuatro Carpets
- Kub Planning
- Kuba Kolec
- KUBE architecture
- Kubedesign
- Kubedesign by Scatolificio Mengoni srl
- KÜBERIT PROFILE SYSTEMS
- kubic
- Kubico s.r.l. / architettura degli interni
- KUBIKOFF
- Kübler GmbH
- Kubo Tsushima Architects
- Kubota Architect Atelier
- Kubus interier
- Küchen & Inneneinrichtungen
- Küchen Staude
- kuci a.r.l
- Kudra srl
- Kuehn Malvezzi