| Detail | K S F spol. s r.o. | 45800995 | | | Detail |
| Detail | KSP Computer & Services, s.r.o. | 27875849 | | | Detail |
| Detail | KS spol. s r.o. | 41030737 | | | Detail |
| Detail | KSS SEIDL spol. s r.o. | 26873826 | Another entity | CZ071 | Detail |
| Detail | K-STAV TŘEBÍČ, s.r.o. | 28270452 | | | Detail |
| Detail | KTA technika, s.r.o. | 62618911 | | | Detail |
| Detail | KTendr s.r.o. | 22593187 | | | Detail |
| Detail | KTS - AME s.r.o. | 42194407 | | | Detail |
| Detail | KTTP s.r.o. | 26746131 | | | Detail |
| Detail | KUBE s.r.o. | 28261950 | | | Detail |
| Detail | KUBITA s.r.o. | 26945584 | | | Detail |
| Detail | KUBOUŠEK s.r.o. | 26076306 | | | Detail |
| Detail | KUDA architecture s.r.o. | 08862524 | | | Detail |
| Detail | Kufima s.r.o. | 09059440 | | | Detail |
| Detail | KUHN - BOHEMIA a.s. | 45242691 | | | Detail |
| Detail | Kulhánek - Mařík, stavební firma, spol. s r.o. | 46679375 | | | Detail |
| Detail | Kultura Jablonec, p. o. | 09555340 | Territorial self-governing unit or its contributory organization | CZ051 | Detail |
| Detail | Kultura Moravský Krumlov | 45671800 | Territorial self-governing unit or its contributory organization | CZ064 | Detail |
| Detail | Kulturní a informační služby Přerov, příspěvková organizace | 45180512 | Territorial self-governing unit or its contributory organization | | Detail |
| Detail | Kulturní a komunitní centrum Přeštice | 48333107 | Territorial self-governing unit or its contributory organization | CZ032 | Detail |
| Detail | Kulturní dům Kopřivnice | 66741122 | Territorial self-governing unit or its contributory organization | CZ080 | Detail |
| Detail | Kulturní dům města Soběslavi | 69092150 | Territorial self-governing unit or its contributory organization | CZ | Detail |
| Detail | Kulturní středisko města Blanska | 00163848 | Territorial self-governing unit or its contributory organization | CZ | Detail |
| Detail | Kumer - Prag spol. s r.o. | 45270520 | Another legal entity | CZ010 | Detail |
| Detail | KUPSTR s.r.o. | 08193410 | | | Detail |
| Detail | Kurka.Med s.r.o. | 41691849 | | | Detail |
| Detail | KURS Kolín a.s. | 26157454 | | | Detail |
| Detail | Kurštejn stavební a obchodní firma s.r.o. | 28762576 | | | Detail |
| Detail | KUSTOD s.r.o. | 27330052 | | | Detail |
| Detail | Kutchenhaus s.r.o. | 22078134 | | | Detail |
| Detail | KVADOS, a.s. | 25826654 | | | Detail |
| Detail | KVADRANT, spol. s r.o. | 46904468 | | | Detail |
| Detail | Kvalitní podzim života, z.ú. | 03338878 | Another legal entity | CZ | Detail |
| Detail | KVAPRO spol. s r.o. | 25479946 | | | Detail |
| Detail | KVAZAR akciová společnost | 00560383 | | | Detail |
| Detail | K & V ELEKTRO a.s. | 28463005 | | | Detail |
| Detail | Květnice Stavby s.r.o. | 24145751 | | | Detail |
| Detail | Květoslav Smrček | 60984678 | | | Detail |
| Detail | Kvinto s.r.o. | 47473509 | | | Detail |
| Detail | KVINT Vlachovo Březí spol. s r.o. | 60647621 | Another entity | CZ031 | Detail |
| Detail | KVIS Pardubice a.s. | 46506934 | | | Detail |
| Detail | KVL Group s.r.o. | 08431965 | | | Detail |
| Detail | KVOTYBEK spol. s r.o. | 05158681 | | | Detail |
| Detail | KVS stavební, s.r.o. | 28982703 | | | Detail |
| Detail | KWP, s.r.o. | 25751689 | Another entity | CZ | Detail |
| Detail | KyberDesk s.r.o. | 21035946 | | | Detail |
| Detail | Kyoto Fusioneering Ltd. | | | | Detail |
| Detail | KyraStav spol. s r.o. | 02408112 | | | Detail |
| Detail | KŽC Doprava, s.r.o. | 27423069 | Another legal entity | CZ010 | Detail |
| Detail | KZ Drážní s.r.o. | 07319274 | Another legal entity | CZ042 | Detail |
| Detail | KZ Šmelc s.r.o. | 07318677 | Another legal entity | CZ042 | Detail |
| Detail | KZ system s.r.o. | 25047752 | | | Detail |
| Detail | L29 Delfin s. r. o. | | | | Detail |
| Detail | L2o - architects s.r.o. | 06830951 | | | Detail |
| Detail | LABARA CABLES s.r.o. | 28340965 | | | Detail |
| Detail | LAB MARK a.s. | 25713001 | | | Detail |
| Detail | Laboratoř výzkumu a managementu rizik (LabR!SK), s.r.o. | 07752857 | | | Detail |
| Detail | Laboro ateliér s.r.o. | 03706940 | | | Detail |
| Detail | LABOSERV s.r.o. | 25507150 | | | Detail |
| Detail | LABOX spol. s r.o. | 49707833 | | | Detail |
| Detail | Labrys, o.p.s. | 27573486 | | | Detail |
| Detail | LABTECH Laboratoře, spol. s r.o. | 60733659 | | | Detail |
| Detail | LABtechnik, s.r.o. | 25330586 | | | Detail |
| Detail | LACHIM-HYGIENA spol. s r.o. | 25870467 | | | Detail |
| Detail | Lachnit - LERZ, s.r.o. | 26825732 | | | Detail |
| Detail | LACOMED, spol. s r.o. | 46348875 | | | Detail |
| Detail | LACTO MORAVA, a.s. | 25298780 | | | Detail |
| Detail | Ladislav Ambros | 08779325 | | | Detail |
| Detail | Ladislava Stejskalová | 73484164 | | | Detail |
| Detail | Ladislav Frídel | 13857321 | | | Detail |
| Detail | Ladislav Gladics | 68512686 | | | Detail |
| Detail | Ladislav Hofrajtr | 73443000 | | | Detail |
| Detail | Ladislav Kovařčík | 06931626 | | | Detail |
| Detail | Ladislav Latta | 64953734 | | | Detail |
| Detail | Ladislav MACEK | 60570989 | Another entity | CZ063 | Detail |
| Detail | Ladislav Pikl | 08632341 | | | Detail |
| Detail | Lakovna Ladná s.r.o. | 05396883 | Another legal entity | CZ064 | Detail |
| Detail | LAKRO, s.r.o. | 62915266 | | | Detail |
| Detail | LAKUM - GALMA a.s. | 28565860 | Another entity | CZ | Detail |
| Detail | LAKUM - KTL, a.s. | 25390538 | Another entity | CZ080 | Detail |
| Detail | La Lorraine, a.s. | 25544551 | | | Detail |
| Detail | Lama Construction s.r.o. | 44567022 | | | Detail |
| Detail | LAMALS a.s. | 00147303 | | | Detail |
| Detail | LAMAN s.r.o. | 25492641 | | | Detail |
| Detail | LAMA PB s.r.o. | 24749044 | | | Detail |
| Detail | LamaTech Solution s.r.o. | 04549848 | | | Detail |
| Detail | LAMBERGA s.r.o. | 29241723 | Another entity | CZ | Detail |
| Detail | Lamp Lighting Technology s.r.o. | 03610101 | | | Detail |
| Detail | LAM-X a.s. | 08968888 | Another legal entity | CZ020 | Detail |
| Detail | Lanči tisk s.r.o. | 03756572 | Another entity | CZ080 | Detail |
| Detail | Land05 s. r. o. | 07898860 | | | Detail |
| Detail | LANDWOOD s.r.o. | 25219766 | | | Detail |
| Detail | LANGARD s.r.o. | 28134800 | | | Detail |
| Detail | LANGER INTERIÉRY s.r.o. | 24291480 | | | Detail |
| Detail | Language solutions s.r.o. | 19590024 | Another legal entity | CZ064 | Detail |
| Detail | LANIGA s.r.o. | 06763286 | Another legal entity | CZ080 | Detail |
| Detail | LANŠKROUNSKO | 70902640 | Another legal entity | CZ053 | Detail |
| Detail | Lantaron s.r.o. | 24298255 | Another entity | CZ010 | Detail |
| Detail | LANTEA a.s. | 25945271 | | | Detail |
| Detail | LAPLAN a.s. | 29201691 | | | Detail |