| Detail | Výzkumný ústav stavebních hmot, a.s. | 26232511 | Another legal entity | CZ064 | Detail |
| Detail | Výzkumný ústav vodohospodářský T. G. Masaryka veřejná výzkumná instituce | 00020711 | Another legal entity | CZ | Detail |
| Detail | Výzkumný ústav živočišné výroby, v. v. i. | 00027014 | Another legal entity | CZ01 | Detail |
| Detail | Vzdělávací a komunitní centrum Integra Vsetín o.p.s. | 26842149 | Another legal entity | CZ072 | Detail |
| Detail | Vzdělávací centrum transperfect s.r.o. | 04668766 | | | Detail |
| Detail | Vzduchotechnika Macák, spol. s r.o. | 49704991 | | | Detail |
| Detail | VZDUCHOTECHNIK, s.r.o. | 40233707 | Another legal entity | CZ05 | Detail |
| Detail | VZS RYCHTÁŘ s.r.o. | 25840428 | | | Detail |
| Detail | WAKENHAT s.r.o. | 27123197 | | | Detail |
| Detail | WAKOS, s.r.o. | 62241834 | | | Detail |
| Detail | Waldorfská základní škola a mateřská škola Olomouc s.r.o. | 28595475 | Another legal entity | CZ071 | Detail |
| Detail | Waldorfská základní škola a střední škola Dobromysl z.ú. | 01811193 | Another legal entity | CZ032 | Detail |
| Detail | Waldorfská základní škola a střední škola, Ostrava-Poruba, příspěvková organizace | 62348264 | Territorial self-governing unit or its contributory organization | CZ080 | Detail |
| Detail | Waldorfská základní škola Mistra Jana | 05981883 | Territorial self-governing unit or its contributory organization | CZ031 | Detail |
| Detail | WALEKTRO s.r.o. | 07795009 | | | Detail |
| Detail | WALI CZ s.r.o. | 25042238 | | | Detail |
| Detail | WALLET s.r.o. | 26704871 | | | Detail |
| Detail | Walstead Moraviapress s.r.o. | 00543411 | | | Detail |
| Detail | Walter de Gruyter GmbH | | | | Detail |
| Detail | WALTER Graphtek CZ s.r.o. | 26440318 | | | Detail |
| Detail | Wampano s.r.o. | 02276895 | Another entity | CZ | Detail |
| Detail | WANDEL CZECH s.r.o. | 28977955 | Territorial self-governing unit or its contributory organization | CZ063 | Detail |
| Detail | want it s.r.o. | 19878257 | | | Detail |
| Detail | Wapit Tech s.r.o. | 21421927 | | | Detail |
| Detail | W.A.R. Defender s.r.o. | | | | Detail |
| Detail | WAREX spol. s r.o. | 18628419 | | | Detail |
| Detail | WARMNIS spol. s r.o. | 43224679 | | | Detail |
| Detail | WASHINA engineering s.r.o. | 27715191 | Another entity | CZ072 | Detail |
| Detail | WASTECH a.s. | 07476728 | | | Detail |
| Detail | WASTEWAY s.r.o. | 17242991 | Another legal entity | CZ | Detail |
| Detail | WATENVI CZ a.s. | 02034697 | | | Detail |
| Detail | Water & Heat Systems, s.r.o. | 06428207 | | | Detail |
| Detail | WATER POWER SERVICE s.r.o. | 24811611 | Another entity | CZ064 | Detail |
| Detail | WATERS Gesellschaft m.b.H., organizační složka | 60459441 | | | Detail |
| Detail | Wattcom s.r.o. | 26694425 | | | Detail |
| Detail | WATT-GURU s.r.o. | 09781781 | | | Detail |
| Detail | Wattstor s.r.o. | 05533295 | Another legal entity | CZ010 | Detail |
| Detail | Wave tracks s.r.o. | 17945186 | | | Detail |
| Detail | W a Weinzettl, s.r.o. | 26031116 | Another entity | CZ031 | Detail |
| Detail | WAY UP s.r.o. | 28108701 | | | Detail |
| Detail | WCOMP s.r.o. | 26080095 | | | Detail |
| Detail | WC Servis s.r.o. | 24794503 | | | Detail |
| Detail | WDF s.r.o. | 24836974 | | | Detail |
| Detail | WD LUX, s.r.o. | 64945031 | | | Detail |
| Detail | WDS s.r.o. | 60707526 | | | Detail |
| Detail | Web4U s.r.o. | 17311501 | | | Detail |
| Detail | Web-co IT s.r.o. | 02531259 | | | Detail |
| Detail | Weber Architects | | | | Detail |
| Detail | webProgress, s.r.o. | 26282143 | | | Detail |
| Detail | Webra System s.r.o. | 24027910 | | | Detail |
| Detail | WECKO sanitární technika s.r.o. | 03818811 | | | Detail |
| Detail | WeDo Services s.r.o. | 09212043 | | | Detail |
| Detail | Weinhold Legal, s.r.o. advokátní kancelář | 25628470 | | | Detail |
| Detail | WEKUS spol. s r.o. | 25013831 | Another entity | CZ042 | Detail |
| Detail | WELAN Solution s.r.o. | 07813228 | | | Detail |
| Detail | Weldis RK, s.r.o. | 25277235 | | | Detail |
| Detail | WELLCO Brno s.r.o. | 25337009 | | | Detail |
| Detail | WELLEN a.s. | 26751666 | | | Detail |
| Detail | WELTOR GROUP s.r.o. | 23785951 | | | Detail |
| Detail | WERFFT,spol. s r.o. | 49433318 | | | Detail |
| Detail | Wertu studio, s.r.o. | 04350766 | | | Detail |
| Detail | WESLIK s.r.o. | 21971951 | | | Detail |
| Detail | WESTech CZ s.r.o. | 02396718 | | | Detail |
| Detail | Westinghouse Electric Company LLC | | | | Detail |
| Detail | Westinghouse Electric Czech Republic s.r.o. | 44846011 | | | Detail |
| Detail | W.H.A. system, spol. s r. o. | 61945251 | | | Detail |
| Detail | WH Develop s.r.o. | 28116992 | | | Detail |
| Detail | WHIRR CREW s.r.o. | 03369145 | | | Detail |
| Detail | White & Case, s.r.o., advokátní kancelář | 07744536 | | | Detail |
| Detail | WhiteHat Security s.r.o. | 23907002 | | | Detail |
| Detail | W H P TECHNIK s.r.o. | 60717971 | | | Detail |
| Detail | WIA spol. s r.o. | 26703297 | | | Detail |
| Detail | Wichterlovo gymnázium, Ostrava-Poruba, příspěvková organizace | 00842702 | Territorial self-governing unit or its contributory organization | CZ080 | Detail |
| Detail | WIFCOM a.s. | 24192830 | Another entity | CZ | Detail |
| Detail | Windhunter Service Sp. z o.o. | | | | Detail |
| Detail | WINGL s.r.o. | 21420840 | | | Detail |
| Detail | Winning PS - stavební firma s.r.o. | 49436589 | | | Detail |
| Detail | WINSITE a.s. | 27409058 | | | Detail |
| Detail | W-INVEST WŰNSCH s.r.o. | 04384431 | | | Detail |
| Detail | WIP Reklama spol. s r.o. | 00511099 | | | Detail |
| Detail | WIRINE ELECTRIC s.r.o. | 09883908 | | | Detail |
| Detail | WN service s.r.o. | 02687631 | | | Detail |
| Detail | WOHER s.r.o. | 62742272 | | | Detail |
| Detail | Wohnstav s.r.o. | 22634321 | | | Detail |
| Detail | WOKESEN s.r.o. | 29050383 | Another entity | CZ | Detail |
| Detail | Wolf Verpackungsmaschinen GmbH | | | | Detail |
| Detail | WOLLOW a. s. | 15030032 | Another entity | CZ | Detail |
| Detail | WOMBAT, s.r.o. | 47912553 | | | Detail |
| Detail | WOOD4YOU s.r.o. | 24187798 | | | Detail |
| Detail | WOODjoix s.r.o. | 23002140 | | | Detail |
| Detail | WOODLIKE s.r.o. | 09440381 | | | Detail |
| Detail | WOOD&STONE s.r.o. | 25862740 | | | Detail |
| Detail | WOOD STYL CZ s.r.o. | 26841568 | | | 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 | WORLD INVEST - Stavby a doprava s.r.o. | 05630584 | | | Detail |
| Detail | "WORLD INVEST" v.o.s. | 14868938 | | | Detail |
| Detail | Worley Czech Republic s.r.o. | 28451911 | | | 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 | WUKA - GROUP s.r.o. | 27561071 | | | Detail |
| Detail | Würth, spol. s r.o. | 48036021 | | | Detail |
| Detail | XANADU a.s. | 14498138 | | | Detail |
| Detail | X-ARMOR s.r.o. | 04068076 | | | Detail |
| Detail | XART s.r.o. | 29261864 | | | Detail |
| Detail | X Consulting Co. s.r.o. | 06579621 | | | Detail |
| Detail | XENIUM Europe s.r.o. | 29193991 | | | Detail |
| Detail | XEROX CZECH REPUBLIC s.r.o. | 48109193 | | | Detail |
| Detail | Xervon GmbH, org.složka | 28456394 | | | Detail |
| Detail | XESS Group s.r.o. | 11854987 | | | Detail |
| Detail | XEVOS Solutions s.r.o. | 27831345 | Czech Republic | CZ080 | Detail |
| Detail | X FUTURE Group s.r.o. | 25113437 | | | Detail |
| Detail | Xolution s.r.o. | | | | Detail |
| Detail | Xolution s.r.o. | 23038217 | | | Detail |
| Detail | X SEVEN dopravní stavby s.r.o. | 08480753 | | | Detail |
| Detail | XT-Card a.s. | 27408256 | | | Detail |
| Detail | XTOPIX architekti s.r.o. | 03780961 | | | 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 | YASHICA s.r.o. | 46980121 | | | Detail |
| Detail | YELLOW SHAPES s.r.o. | 05322138 | | | Detail |
| Detail | YLK spol. s r.o. | 26145634 | | | Detail |
| Detail | Ynot technologies s.r.o. | 28390156 | | | Detail |
| Detail | Yord s.r.o. | 07787537 | | | Detail |
| Detail | YoungLink s.r.o. | 19371837 | Another legal entity | CZ031 | Detail |
| Detail | Your IT s.r.o. | 24180513 | | | Detail |
| Detail | yoursport plus s.r.o. | 04430379 | | | Detail |
| Detail | YOUR SYSTEM, spol.s r.o. | 00174939 | | | Detail |
| Detail | Y S S E N - spol. s r.o. | 44566565 | | | Detail |
| Detail | YUCON CZ, s.r.o. | 29184771 | | | Detail |
| Detail | Yumer s.r.o. | 22801464 | | | Detail |
| Detail | Yunex, s.r.o. | 09962638 | | | Detail |
| Detail | YURA Hotel Čeladná s.r.o. | 08164771 | | | Detail |
| Detail | YYYY s.r.o. | 28742745 | | | Detail |
| Detail | Zábrodská Klára, Mgr., advokát | 71333193 | State contributory organization | CZ010 | Detail |
| Detail | Záchranný útvar Hasičského záchranného sboru České republiky | 75152304 | Czech Republic | | Detail |
| Detail | Zadavatel | 00000000 | Another entity | CZ | Detail |
| Detail | Zahradní architektura Martinov s.r.o. | 27395421 | | | Detail |
| Detail | ZAHRADNÍ ARCHITEKTURA TÁBOR s.r.o. | 14504588 | | | 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 | Zahradní domky s.r.o. | 19988478 | | | Detail |
| Detail | ZAHRADY BEZ HRANIC s.r.o. | 21778477 | | | Detail |