| Detail | T-SOFT a.s. | 40766314 | | | Detail |
| Detail | TSP DATA, a.s. | 26224712 | | | Detail |
| Detail | TSP Plus s.r.o. | 05650780 | | | Detail |
| Detail | TSV Electrics s.r.o. | 23561521 | | | Detail |
| Detail | TŠ recycling s.r.o. | 23441127 | | | Detail |
| Detail | TT HOLDING, a.s. | 24171034 | Another legal entity | CZ064 | Detail |
| Detail | TTC Controls s.r.o. | 09358650 | | | Detail |
| Detail | TTC MARCONI s. r. o. | 48591254 | | | Detail |
| Detail | ttc, s.r.o. | | | | Detail |
| Detail | TTC TELEKOMUNIKACE, s.r.o. | 41194403 | | | Detail |
| Detail | T-Technology s.r.o. | 03934527 | | | Detail |
| Detail | TTK CZ s.r.o. | 25928180 | | | Detail |
| Detail | TTS energo s.r.o. | 60724692 | Another entity | CZ | Detail |
| Detail | TUBES spol. s r.o. | 25062255 | | | Detail |
| Detail | Tudos Solution s.r.o. | 14011158 | | | Detail |
| Detail | TUFÍR, spol. s r.o. | 26263718 | | | Detail |
| Detail | TU-FLOR spol. s r.o. | 48264873 | Another entity | CZ042 | Detail |
| Detail | TUkas ČSAO a.s. | 25614304 | Czech Republic | CZ | Detail |
| Detail | Tunkr, spol. s r.o. | 26952734 | | | Detail |
| Detail | TURBION, s.r.o. | 03222446 | | | Detail |
| Detail | Turck, s.r.o. | 64256642 | | | Detail |
| Detail | Turek Lukáš | 66877181 | Another entity | CZ020 | Detail |
| Detail | TUZETU s.r.o. | 17447828 | | | Detail |
| Detail | TVAR, výrobní družstvo Klatovy | 00028983 | | | Detail |
| Detail | TVD-Technická výroba, a.s. | 26252937 | Another legal entity | CZ072 | Detail |
| Detail | Tvé barvy s.r.o. | 23303204 | | | Detail |
| Detail | TVM stavby s.r.o. | 06331807 | | | Detail |
| Detail | Tvoje elektrárna a.s. | 27488764 | | | Detail |
| Detail | twibbit spol. s r.o. | 03569004 | | | Detail |
| Detail | Twinpax Service s.r.o. | 01895095 | | | Detail |
| Detail | TX GROUP a.s. | 28823532 | | | Detail |
| Detail | TYP AGENCY s.r.o. | 48039306 | Another legal entity | CZ | Detail |
| Detail | Type.Bo s.r.o. | 14305356 | | | Detail |
| Detail | TYPINGO s.r.o. | 23753536 | | | Detail |
| Detail | Typos, tiskařské závody, s.r.o. | 28433301 | | | Detail |
| Detail | Tyr-stav s.r.o. | 23803665 | | | Detail |
| Detail | TZ Kubíček s.r.o. | 03234291 | | | Detail |
| Detail | TZB Consult Prague s.r.o. | 24832618 | | | Detail |
| Detail | TZMO Czech Republic s.r.o. | 26723476 | | | Detail |
| Detail | T2K Progressive s.r.o. | 09849009 | | | Detail |
| Detail | U Hezounů s.r.o. | 10873988 | Another entity | CZ080 | Detail |
| Detail | U Laury s.r.o. | 28388721 | | | Detail |
| Detail | UCA a.s. | 24311642 | | | Detail |
| Detail | Účetní ústředna s.r.o. | 09362258 | | | Detail |
| Detail | UDI MORAVA s.r.o. | 25893076 | | | Detail |
| Detail | UDIMO, spol. s r.o. | 44740069 | | | Detail |
| Detail | UFIR s.r.o. | 09186701 | | | Detail |
| Detail | UH CAR, s.r.o. | 25512021 | Another legal entity | CZ072 | Detail |
| Detail | Uhelný Mlýn s.r.o. | 60742399 | Another legal entity | CZ020 | Detail |
| Detail | Uherskohradišťská nemocnice a.s. | 27660915 | Another legal entity | CZ072 | Detail |
| Detail | UCHYTIL s.r.o. | 60734078 | | | Detail |
| Detail | UCHYTILCZ, s.r.o. | 29211492 | | | Detail |
| Detail | ÚJV Řež, a. s. | 46356088 | Another entity | CZ020 | Detail |
| Detail | Úklid a Pořádek, s.r.o. | 21751901 | | | Detail |
| Detail | UKLIDHK s.r.o. | 04265092 | | | Detail |
| Detail | Úklid-Zlín s.r.o. | 06509088 | | | Detail |
| Detail | Ulehla Ivan s.r.o. | 29212375 | | | Detail |
| Detail | uLékaře.cz, s.r.o. | 05341051 | | | Detail |
| Detail | ULIMEX, spol. s r.o. | 14864878 | | | Detail |
| Detail | U+M Servis s.r.o. | 25157540 | | | Detail |
| Detail | UMBRELLA CITY LINES s.r.o. | 09057846 | | | Detail |
| Detail | UMBRELLA Coach & Buses s.r.o. | 02665824 | | | Detail |
| Detail | UMBRELLA s.r.o. | 25299352 | Another entity | CZ052 | Detail |
| Detail | Umbrella.technology s.r.o. | 17132959 | Czech Republic | CZ042 | Detail |
| Detail | Uměleckoprůmyslové museum v Praze | 00023442 | State contributory organization | | Detail |
| Detail | U-MYVAL Čištění & Nátěry s.r.o. | 21810354 | | | Detail |
| Detail | UNBC spol. s r.o. | 05720621 | | | Detail |
| Detail | Underline, a.s. | 25294482 | | | Detail |
| Detail | UniCab, s.r.o. | 26961873 | | | Detail |
| Detail | Unicont Opava s.r.o. | 65142756 | | | Detail |
| Detail | Unicorn Business Systems a.s. | 21940321 | | | Detail |
| Detail | Unicorn Market Systems a.s. | 21941751 | | | Detail |
| Detail | Unicorn Systems a.s. | 25110853 | | | Detail |
| Detail | UNIDATAZ s.r.o. | 25339061 | | | Detail |
| Detail | Unifrol CZ s.r.o. | 04132327 | Another entity | CZ071 | Detail |
| Detail | UNIGEO a.s. | 45192260 | | | Detail |
| Detail | Unigras trend s.r.o. | 07315651 | | | Detail |
| Detail | UNIKO PÍSEK, s.r.o. | 46679405 | | | Detail |
| Detail | UNIKOL CZ, s.r.o. | 25682539 | | | Detail |
| Detail | Unikont Group s.r.o. | 41193113 | | | Detail |
| Detail | UNILES, a.s. | 47307706 | | | Detail |
| Detail | Unimed Praha, s.r.o. | 14891344 | | | Detail |
| Detail | UNIMETAL - engineering, s.r.o. | 26787385 | | | Detail |
| Detail | UNIMONT J.C.K. s.r.o. | 25269445 | | | Detail |
| Detail | UNImont plus s.r.o. | 06875327 | Another entity | CZ063 | Detail |
| Detail | UnionOcel, s.r.o. | 26487292 | Another legal entity | CZ010 | Detail |
| Detail | UNIONSTEEL s.r.o. | 25381601 | Another entity | CZ080 | Detail |
| Detail | UNIOSO s.r.o. | 03379787 | | | Detail |
| Detail | UNIPRESS spol. s r.o. | 47282789 | Czech Republic | CZ | Detail |
| Detail | UNIPRO - ALPHA C.S., spol. s r.o. | 26435357 | | | Detail |
| Detail | UNIQA pojišťovna, a.s. | 49240480 | | | Detail |
| Detail | Unis Services s.r.o. | 29370451 | | | Detail |
| Detail | UNISERVIS HAŠEK, s.r.o. | 25719980 | | | Detail |
| Detail | UNISMINI - služby, spol. s r.o. | 62418742 | | | Detail |
| Detail | UNISSA plus, SE | 28998081 | | | Detail |
| Detail | UNISTAV CONSTRUCTION a.s. | 03902447 | | | Detail |
| Detail | UNISYSTEMS s.r.o. | 19590865 | | | Detail |
| Detail | UNITED BAKERIES a.s. | 28976231 | Another legal entity | CZ | Detail |
| Detail | United Polymers, s.r.o. | 18055290 | Another legal entity | CZ071 | Detail |
| Detail | Unitender, s.r.o. | 25394495 | | | Detail |
| Detail | UnitX s.r.o. | 07850646 | | | Detail |
| Detail | Universal Smart Solutions s.r.o. | 01442023 | | | Detail |
| Detail | Univerzita Hradec Králové | 62690094 | Another legal entity | | Detail |
| Detail | UNTRACO s.r.o. | 15503623 | | | Detail |
| Detail | UP constructions s.r.o. | 60724609 | | | Detail |
| Detail | UpGrid Aerospace s.r.o. | 24085642 | | | Detail |
| Detail | upit s.r.o. | 07522908 | | | Detail |
| Detail | UPS Servis spol. s r.o. | 62577328 | | | Detail |
| Detail | UPSTRUCTURE s.r.o. | 10836004 | | | Detail |
| Detail | Urban Centre družstvo | 02347300 | | | Detail |
| Detail | Urban Digital s.r.o. | 11654368 | | | Detail |
| Detail | URBAN FORESTRY s.r.o. | 14057476 | | | Detail |
| Detail | Urban legal, advokátní kancelář s.r.o. | 17983835 | | | Detail |
| Detail | URBANIST architects + designers s.r.o. | 04276922 | | | Detail |
| Detail | URBANITY Development Tachov s.r.o. | 11633000 | Another entity | CZ010 | Detail |
| Detail | URBANKRAFT s.r.o. | 23154497 | | | Detail |
| Detail | URC Systems, spol. s r.o. | 25547526 | | | Detail |
| Detail | Urotech GmbH, odštěpný závod | 29321735 | | | Detail |
| Detail | Úřad Národní rozpočtové rady | 05553539 | Czech Republic | CZ010 | Detail |
| Detail | Úřad práce České republiky | 72496991 | Czech Republic | CZ | Detail |
| Detail | Úřad pro civilní letectví | 48134678 | Czech Republic | CZ010 | Detail |
| Detail | Úřad pro dohled nad hospodařením politických stran a politických hnutí | 05553466 | Czech Republic | CZ064 | Detail |
| Detail | Úřad pro mezinárodněprávní ochranu dětí | 00025402 | Czech Republic | CZ064 | Detail |
| Detail | Úřad pro ochranu hospodářské soutěže | 65349423 | Czech Republic | CZ064 | Detail |
| Detail | Úřad pro ochranu osobních údajů | 70837627 | Czech Republic | CZ | Detail |
| Detail | Úřad pro přístup k dopravní infrastruktuře | 05553521 | Czech Republic | CZ010 | Detail |
| Detail | Úřad pro technickou normalizaci, metrologii a státní zkušebnictví | 48135267 | Czech Republic | CZ010 | Detail |
| Detail | Úřad pro zastupování státu ve věcech majetkových | 69797111 | Czech Republic | | Detail |
| Detail | Úřad průmyslového vlastnictví | 48135097 | Czech Republic | CZ010 | Detail |
| Detail | Úřad vlády České republiky | 00006599 | Czech Republic | CZ01 | Detail |
| Detail | US PRINT s.r.o. | 28472781 | | | Detail |
| Detail | USDistribution s.r.o. | 05709156 | Czech Republic | CZ010 | Detail |
| Detail | ÚSPĚŠNÍ s.r.o. | 04286880 | | | Detail |
| Detail | Ústav analytické chemie AV ČR,v. v. i. | 68081715 | Another legal entity | CZ064 | Detail |
| Detail | Ústav archeologické památkové péče severozápadních Čech, v. v. i. | 47325011 | Another entity | | Detail |
| Detail | Ústav biologie obratlovců AV ČR, v. v. i. | 68081766 | Another legal entity | CZ064 | Detail |
| Detail | Ústav fotoniky a elektroniky AV ČR, v. v. i. | 67985882 | Another legal entity | CZ010 | Detail |
| Detail | Ústav fyzikální chemie J. Heyrovského AV ČR, v.v.i. | 61388955 | Another legal entity | CZ010 | Detail |
| Detail | Ústav geoniky AV ČR, v. v. i. | 68145535 | Another legal entity | CZ080 | Detail |
| Detail | Ústav hematologie a krevní transfuze | 00023736 | State contributory organization | CZ010 | Detail |
| Detail | Ústav chemických procesů AV ČR, v. v. i. | 67985858 | Another legal entity | CZ010 | Detail |
| Detail | Ústav chirurgie ruky a plastické chirurgie, příspěvková organizace | 00193011 | Territorial self-governing unit or its contributory organization | CZ051 | Detail |
| Detail | Ústav leteckého zdravotnictví Praha | 61382981 | State contributory organization | CZ01 | Detail |
| Detail | Ústav mezinárodních vztahů, v. v. i. | 48546054 | Another legal entity | CZ01 | Detail |
| Detail | Ústav pro českou literaturu AV ČR, v. v. i. | 68378068 | Another legal entity | CZ01 | Detail |
| Detail | Ústav pro odborné zjišťování příčin leteckých nehod | 70990948 | Czech Republic | CZ01 | Detail |
| Detail | Ústav pro péči o matku a dítě | 00023698 | State contributory organization | CZ010 | Detail |
| Detail | Ústav pro státní kontrolu veterinárních biopreparátů a léčiv | 00019453 | Czech Republic | CZ | Detail |
| Detail | Ústav pro studium totalitních režimů | 75112779 | Czech Republic | CZ010 | Detail |
| Detail | Ústav přístrojové techniky AV ČR, v. v. i. | 68081731 | Another legal entity | CZ064 | Detail |