| Detail | WELLEN a.s. | 26751666 | | | Detail |
| Detail | WELTOR GROUP s.r.o. | 23785951 | | | Detail |
| Detail | Westinghouse Electric Company LLC | | | | Detail |
| Detail | Westinghouse Electric Czech Republic s.r.o. | 44846011 | | | Detail |
| Detail | WH Develop s.r.o. | 28116992 | | | Detail |
| Detail | W.H.A. system, spol. s r. o. | 61945251 | | | Detail |
| Detail | White & Case, s.r.o., advokátní kancelář | 07744536 | | | Detail |
| Detail | WIA spol. s r.o. | 26703297 | | | Detail |
| Detail | WIFCOM a.s. | 24192830 | Another entity | CZ | Detail |
| Detail | Wichterlovo gymnázium, Ostrava-Poruba, příspěvková organizace | 00842702 | Territorial self-governing unit or its contributory organization | CZ080 | Detail |
| Detail | Windhunter Service Sp. z o.o. | | | | Detail |
| Detail | WIRINE ELECTRIC s.r.o. | 09883908 | | | Detail |
| Detail | WN service s.r.o. | 02687631 | | | Detail |
| Detail | WOLLOW a. s. | 15030032 | Another entity | CZ | Detail |
| Detail | WOOD&STONE s.r.o. | 25862740 | | | Detail |
| Detail | Woodwaste s.r.o. | 08773815 | Another entity | CZ032 | Detail |
| Detail | wopee labs s.r.o. | 17997224 | Another legal entity | CZ | Detail |
| Detail | Woring s.r.o. | 29159342 | | | Detail |
| Detail | Wotan Forest, a.s. | 26060701 | Another legal entity | CZ | Detail |
| Detail | WrapStyle s.r.o. | 29304849 | Czech Republic | CZ | Detail |
| Detail | WRDATACENTRUM s.r.o. | 07048831 | | | Detail |
| Detail | WTE PowerBolt s.r.o. | 28202759 | Another legal entity | CZ | Detail |
| Detail | XANADU a.s. | 14498138 | | | Detail |
| Detail | Xervon GmbH, org.složka | 28456394 | | | Detail |
| Detail | XEVOS Solutions s.r.o. | 27831345 | Czech Republic | CZ080 | Detail |
| Detail | XT-Card a.s. | 27408256 | | | Detail |
| Detail | Yacht klub Jestřábí, z.s. | 03569039 | Another legal entity | CZ031 | Detail |
| Detail | YANNICK - Plast s.r.o. | 27777294 | Another legal entity | CZ | Detail |
| Detail | Yaroslav Duminskyi | 17965187 | | | Detail |
| Detail | Yashica Events a.s. | 07306041 | Another legal entity | CZ063 | Detail |
| Detail | Yord s.r.o. | 07787537 | | | Detail |
| Detail | YoungLink s.r.o. | 19371837 | Another legal entity | CZ031 | Detail |
| Detail | yoursport plus s.r.o. | 04430379 | | | Detail |
| Detail | Yumer s.r.o. | 22801464 | | | Detail |
| Detail | YYYY s.r.o. | 28742745 | | | Detail |
| Detail | Z I T E X s.r.o. | 25273825 | | | Detail |
| Detail | Zábrodská Klára, Mgr., advokát | 71333193 | | | Detail |
| Detail | Zadavatel | 00000000 | Another entity | CZ | Detail |
| Detail | Zahradnické služby Měšice s.r.o. | 03542637 | Another entity | CZ020 | Detail |
| Detail | Zahradnické úpravy s.r.o. | 27707113 | | | Detail |
| Detail | ZAHRADNICKÝ SERVIS s.r.o. | 28971396 | | | Detail |
| Detail | Zahradnictví vlaštovka s.r.o. | 06993745 | Another legal entity | CZ080 | Detail |
| Detail | ZAHRADY BEZ HRANIC s.r.o. | 21778477 | | | Detail |
| Detail | Záchranný útvar Hasičského záchranného sboru České republiky | 75152304 | Czech Republic | | Detail |
| Detail | Zaitra s.r.o. | 08908508 | Another legal entity | CZ | Detail |
| Detail | Základní škola a Mateřská škola Běly Jensen, Opatov, okres Svitavy | 75015595 | Czech Republic | CZ | Detail |
| Detail | Základní škola a Mateřská škola Březová, okres Opava, příspěvková organizace | 70984557 | Territorial self-governing unit or its contributory organization | CZ080 | Detail |
| Detail | Základní škola a Mateřská škola Cehnice, okres Strakonice | 70994285 | Territorial self-governing unit or its contributory organization | CZ031 | Detail |
| Detail | Základní škola a mateřská škola Častolovice | 70188874 | Territorial self-governing unit or its contributory organization | CZ052 | Detail |
| Detail | Základní škola a mateřská škola Dolní Lánov | 71009761 | Territorial self-governing unit or its contributory organization | CZ052 | Detail |
