| 4041 | Kuželka d.o.o. | http://peugeot.kuzelka.com |
| 4042 | Kvadra consulting | http://www.kvadraconsulting.com |
| 4043 | Kvadrat, obrt | http://www.kvadrat.hr |
| 4044 | Kvaksi | http://www.kvak-si.com |
| 4045 | Kvantum, obrt | http://www.kvantum.hr |
| 4046 | Kvantum-tim d.o.o. | http://www.kvantum-tim.hr |
| 4047 | Kvarner Express International | http://www.kvarner-express.com |
| 4048 | Kvarner Info | http://www.kvarner.hr |
| 4049 | Kvarnerplastika d.o.o. | http://www.kvarnerplastika.hr |
| 4050 | Kvarnerski radio | http://www.kvarnerskiradio.hr |
| 4051 | K-V-K, SB | http://www.kvk.hr |
| 4052 | KVP RH | http://www.crosec.hr |
| 4053 | Kyara d.o.o. | http://www.kyara.hr |
| 4054 | Kyokushinkai karate | http://www.kyokushinkai.hr |
| 4055 | L & M Split d.o.o. | http://www.lm-split.hr |
| 4056 | L.P.D. Tours | http://www.lpdtours.hr |
| 4057 | La casa di Matiki | http://www.matiki.com |
| 4058 | La Rocka | http://www.larocka.hr |
| 4059 | Labomar d.o.o. | http://www.labomar.hr |
| 4060 | Labrador | http://www.labrador.hr |