| 4021 | Kula nekretnine | http://www.kula-nekretnine.hr |
| 4022 | Kulina d.o.o. | http://www.kulina.hr |
| 4023 | Kult studio-Madato d.o.o. | http://www.kult-studio.com |
| 4024 | Kultura Plus | http://www.kulturaplus.com |
| 4025 | kultura prostora | http://free-zg.htnet.hr/kultura_prostora |
| 4026 | Kulturni front | http://www.kulturnifront.hr |
| 4027 | Kumal d.o.o. | http://www.kumal.hr |
| 4028 | KUMI, udruga | http://www.kumi.hr |
| 4029 | Kumrovec | http://www.kumrovec.hr |
| 4030 | Kuna Corporation d.o.o. | http://www.kuna-corporation.hr |
| 4031 | Kunapak d.o.o. | http://www.kunapak.hr |
| 4032 | Kundih - Pomorski konzalting | http://www.pomorsko-dobro.com/ |
| 4033 | Kunis d.d. | http://www.kunis.hr |
| 4034 | Kunkera d.o.o. | http://www.kunkera.hr |
| 4035 | Kupujemhrvatsko.com | http://www.kupujemhrvatsko.com |
| 4036 | Kurenat, obrt | http://www.kurenat.hr |
| 4037 | Kušić promet d.o.o. | http://www.kusic-promet.hr |
| 4038 | Kutjevo d.d. | http://www.kutjevo.com |
| 4039 | Kuželka d.o.o. | http://peugeot.kuzelka.com |
| 4040 | Kuželka d.o.o. | http://peugeot.kuzelka.com |