| 3N SOLUTIONS | Warszawa | | L1 2 | |
| 4EN S.A. | Warszawa | | L5 3 | |
| 4U AUTOMATION | Bielsko-Biała | | Z 23 | |
| A.EBERLE | Norymberga | Germany | A 60 | |
| AD MOTO | Katowice | | L6 9b | |
| ADDEV MATERIALS | Żychlin | | W 29 | |
| ADELID | Bielawa | | Z 11 | |
| AE SOLUTION Sp. z o.o. | Gdańsk | | OZE 15 | |
| AIM Project | Rączki | | O 10 | |
| AKTYWIZACJA | Kraków | | A 44 | |
| Alfa Power | | | O 10 | |
| ALFRA GMBH | Hockenheim | Germany | L2 23 | |
| ALLFORGEN | Gdynia | | L2 11 | |
| ALSEVA EPC | Kraków | | L1 1 | |
| ALTER SA | Tarnowo Podgórne | | W 8 | |
| ALTRAFO POLSKA | Poznań | | W 15 | |
| AMAGO | Liszki | | L2 17 | |
| AMICUS | Rybie | | M 11 | |
| AMISTON | Opole | | L2 14 | |
| ANDRA Sp. z o.o. | Warszawa | | A 70 | |
| APA | Warszawa | | A 62 | |
| APLISENS S.A. | Warszawa | | W 35 | |
| APS ENERGIA SA | Stanisławów Pierwszy | | A 26 | OZE 11 |
| Arcon Polska Sp. z o.o. | Warszawa | | L5 5 | |
| AREX Sp. z o.o. | Gdynia | | L5 3 | |
| ARINET sp. z o.o. | Gliwice | | O 13 | |
| ARTECHE | Mungia | Spain | A 65 | |
| ARTECHE | Mungia | Spain | A 60 | |
| ARTSMART/smart-grids.pl | Warszawa | | | |
| ASAV | Myszków | | L2 8 | |
| AST SYSTEM | Zielona Góra | | A 3 | |
| ASTAT | Poznań | | A 60 | |
| ATEST GAZ | Gliwice | | Z 17 | |
| Atest Ochrona pracy | Warszawa | | A 12 | |
| ATLAS | Raszków | | L1 9 | |
| ATM LIGHTING | Gdańsk | | A 42 | |
| AUTOMA.NET | Rzeszów | | Z 23 | |
| AUTOMATYKA | Warszawa | | A 2 | |
| AWEX | Masłomiąca | | A 51 | |
| AXPO POLSKA | | | A 49 | |
| BAKS | Karczew | | G 23 | G 22 |
| Basor Electric | Gandia | Spain | M 13 | |
| BENNING | Głosków | | G 16 | |
| BEZ TRANSFORMATORY A.S. | Bratislava | Slovak Republic | Z 13 | |
| BEZPOL | Myszków | | L2 8 | L3 2 |
| BIALL Sp. z o.o. | Gdańsk | | M 4 | |
| BIEL PRE | Liszki k/Krakowa | | L5 4 | |
| BLUMENBECKER H i S | Katowice/Opole | | W 30 | |
| BMZ POLAND | Gliwice | | O 30 | |
| Boplast Sp. z o.o. | Lębork | | A 58 | |
| BROTHER | Warszawa | | N 18 | |
| BUDNIOK TECHNIKA | Czechowice-Dziedzice | | | |
| C. C. JENSEN | Warszawa | | K 11 | |
| C.H. ERBSLÖH POLSKA | Warszawa | | Z 9 | |
| C.Z.E. Sp. z o.o. | Warszawa | | O 7 | |
| CANTONI GROUP - EMIT S.A. | Cieszyn | | M 6 | |
| CAROLINA TOYOTA BIELSKO | Czechowice-Dziedzice | | SEL 1 | |
| CBM TECHNOLOGY | Niepruszewo | | A 8 | |
| CELLPACK Polska | Warszawa | | K 12 | |
| CELO | Konstantynów Łódzki | | Z 15 | |
| CENTRAL EUROPEAN WORKS | Smolec | | K 22 | |
| CES | Podłęże | | A 38 | |
| CIPSACIRCUITS | Rubi | Spain | G 30 | |
| CME | Piaseczno | | Z 27 | |
| COMPUTERS & CONTROL | Katowice | | A 78 | |
| CONNECT SOLUTIONS | Wejherowo | | N 4 | |
| CONTRANS TI | Szewce | | A 24 | |
| COPA-DATA POLSKA | Kraków | | A 32 | |
| CORAB S.A. | Olsztyn | | OZE 12 | |
| COWEME SPA | Lazaro di Savena (BO) | Italy | M 1 | |
| CR GAMA | Bielsko-Biała | | W 8a | |
| DACPOL | Piaseczno | | A 30 | |
| DAMLIGHT | Racibórz | | G 1 | |
| DEGSON TECHNOLOGY | NINGBO | China | N 29 | |
| DEHN POLSKA | Warszawa | | N 12 | |
| DELES GROUP | Warszawa | | Z 14 | |
| DELTA ELECTRONICS | Warszawa | | A 49 | |
| DGT | Straszyn | | Z 22 | |
| Digitop Electric | Kraków | | A 63 | |
| DIPOL | Kraków | | Z 29 | |
| DIRAK Polska Sp. z o.o. | Żołędowo | | W 23 | |
| DMKGENERALGROUP | Włosań | | L5 11 | |
| DOKTORVOLT | Malichów | | W 16 | |
| DPM | Oborniki | | M 7 | |
| DRIM | Dąbrowa Górnicza | | K 6 | |
| DUCATI ENERGIA | Bologna | Italy | W 18 | |
| EasySolar | Poznań | | G 8 | |
| EATON ELECTRIC Sp. z o.o. | Gdańsk | | | |
| EFEN Sp. z o.o. | Czeladź | | G 27 | |
| EGE | Českē Budĕjovice | Czechia | A 60 | |
| ELANTAS EUROPE | Hamburg | Germany | W 29 | |
| EL-BO KOMPENSACJA | Otwock | | W 7 | |
| ELBOK SP. J. | Katowice | | O 29 | |
| ELECTRA POLSKA | Bydgoszcz | | G 29 | L6 7 |
| ELECTRAPLAN | Piaseczno | | N 28 | |
| ELEKTRO OMEGA | Katowice | | L6 9 | |
| ELEKTRO.INFO | Warszawa | | K 7 | |
| Elektroinstalator | Warszawa | | A 12 | |
| ELEKTROMETAL ENERGETYKA | Warszawa | | A 37 | |
| ELEKTROMETAL SA | Cieszyn | | G 17 | |
| ELEKTROMONTAŻ RZESZÓW SA | Rzeszów | | N 17 | L2 15 |
| ELEKTRONIK | Warszawa | | A 62 | |
| ELEKTROONLINE.PL | Białystok | | | |
| ELEKTRO-PLAST Opatówek | Opatówek | | N 21 | |
| ELEKTROSVIT | Grotniki | | L2 25 | |
| ELENCO | Jędrzejów | | L2 19 | |
| ELGÓR + HANSEN SA | Chorzów | | A 75 | |
| ELHAND TRANSFORMATORY | Lubliniec | | A 16 | |
| ELIT S.A. | Warszawa | | O 18 | A 49a |
| ELKO-BIS Systemy Odgromowe | Wrocław | | L2 4 | L2 24 |
| ELMA energia Sp. z o.o. | Olsztyn | | A 45 | |
| ELMARK AUTOMATYKA S.A. | Warszawa | | O 12 | |
| Elmech-ASE S. A. | Pruszcz Gdański | | OZE 18 | |
| ELNAP | Dąbrowa Górnicza | | K 6 | |
| ELNORD | Reda | | N 1 | |
| ELPIO | Komorniki | | W 11 | |
| ELPLAST+ | Jastrzębie-Zdrój | | N 31 | |
| EL-PUK Sp. z o.o. | Konstantynów Łódzki | | G 20 | |
| EL-Q S.A. | Częstochowa | | L2 10 | |
| ELSTA Sp. z o.o. | Wieliczka | | OZE 17 | |
| EL-SUN | Wieliczka | | OZE 4 | |
| ELTOM | Lębork | | L2 7 | |
| ELTROX | Częstochowa | | K 5 | |
| EMIT S.A. | Żychlin | | M 6 | |
| EMITER Sp. z o.o. | Katowice | | L5 9 | |
| EMKA | Mysłowice | | G 25 | |
| EMU | Gdańsk | | A 29 | |
| ENAP SA | Kozienice | | A 26 | |
| ENCO | Warszawa | | L1 3 | |
| ENECONSULTING | Poznań | | Z 19 | |
| Energa-Operator SA | Gdańsk | | A 39 | |
| ENERGETYKA.PLUS | Warszawa | | A 46 | |
| ENERGIA CAPITAL | Inowrocław | | Z 3a | |
| ENERGOTOOLS | Kraków | | | |
| ENERGOTYTAN | Katowice | | K 23 | L1 5 |
| Energy Partners | Dopiewo | | Z 12 | |
| EnergyOn | Warszawa | | O 8 | |
| ENERVISION | Bielsko-Biała | | W 14 | |
| EP&M | Szczecinek | | A 56 | |
| ERGOM | Łódź | | A 35 | |
| ERKO | Jonkowo | | A 43 | |
| ERLOS GMBH | Zwickau | Germany | OZE 1 | |
| ETA ENCLOSURES | Września | | O 14 | |
| ETAP IGE+XAO | Kraków | | O 4 | |
| ETC PLUS | Ostrowiec Świętokrzyski | | A 28 | |
| EURO PRO GROUP | Dzierżoniów | | W 32 | |
| EURO-BOX | Świebodzin | | W 1 | |
| EURODIS | Zamość k. Bydgoszczy | | A 76 | |
| EURODRUT | Tarnowo Podgórne | | N 23 | |
| EURO-ELEKTRO POLSKA | Czeladź | | L6 3 | |
| EURO-LOCKS | Ruda Śląska | | N 14 | |
| EUROTRAFO Sp. z o.o. | Skierniewice | | Z 7 | |
| EVOLTEC | Warszawa | | G 11 | |
| EXAR | Bielsko-Biała | | L2 3 | |
| EXPLOSION POWER GmbH | Niederlenz | Switzerland | A 49 | |
| F&F Pabianice | Pabianice | | N 11 | |
| FACHOWY ELEKTRYK | Libiąż | | A 1 | |
| FALESIA SYSTEMY | Warszawa | | O 28 | |
| Famatel | Bielawa | | M 10 | |
| FIAMM ENERGY TECHNOLOGY | Montecchio Maggiore | Italy | A 11 | |
| FIBOX | Warszawa | | A 61 | |
| FINDER POLSKA Sp. z o.o. | Sady | | A 57 | L5 1 |
| FOXYTECH SP. Z O.O. | Świdnica | | A 27 | |
| FTZ | Żychlin | | K 8 | |
| G&W | | USA | O 10 | |
| GAZEX - detektory gazów | Warszawa | | W 21 | |
| GENERAL ENERGY POLAND | Bielsko-Biała | | L7 9 | |
| GENWAY | Płock | | O 17 | |
| GERDA | Sokołów | | G 14 | |
| GIRA | | | A 1 | |
| GRACO Sp. z o.o. | Warszawa | | L6 9a | |
| GRODNO S.A. | Michałów Grabina | | OZE 14 | |
| GROMTOR | Wrocław | | L2 16 | |
| GRUPA TOPEX | Warszawa | | A 1 | |
| GUENTHER POLSKA | Długołęka | | O 21 | |
| HABER ENERGIA | Chełm | | K 9 | |
| HAEFELY AG | Basel | Switzerland | A 49 | |
| HAPAM | Łódź | | W 14 | |
| HAUFF-TECHNIK | Hermaringen | Germany | K 13 | |
| HDW POLSKA SP. Z O.O. | Bronisze | | L7 1 | |
| Heilind Electronics Sp. z o.o. | Kraków | | W 26 | |
| HELIOS STRATEGIA | Oleśnica | | O 20 | |
| HELLERMANNTYTON | Słupca | | W 10 | |
| HELMAR | Warszawa | | A 49 | |
| HELUKABEL | Jaworzno | | O 1 | |
| HENGTONG | Suzhou | China | Z 19 | |
| HENSEL | Poznań | | G 5 | |
| HEWEA | Mirków | | L6 12 | |
| Hitachi Energy | Warszawa | | A 20 | L5 2 |
| HMF POLSKA Sp. z o.o. | Krzeszowice | | L6 14 | |
| HOKE S.C. | Chorzelów | | L2 18 | |
| HOPPECKE | Śródka | | A 36 | |
| HUAWEI | Warszawa | | OZE 19 | |
| HUBEI HAN GUANG | | China | O 24 | |
| HUBIX SP. Z O.O. | Huta Żabiowolska | | K 2 | |
| IASE | Wrocław | | A 54 | |
| IEN | Warszawa | | A 76a | |
| IEn GDAŃSK | Gdańsk | | A 17 | |
| IEn ZD BIAŁYSTOK | Białystok | | A 17 | |
| IGUS | Warszawa | | K 14 | |
| IMEFY | Świebodzice | | Z 21 | |
| IMPACT | Warszawa | | A 7 | |
| INCOBEX SP. Z O.O. | Bielsko-Biała | | Z 16 | |
| Industrooprema | Sesvete | Croatia | Z 1 | |
| INGREMIO Bracia Kotulscy | Bolesław | | W 25 | |
| INNOTECHNIKA | Gdynia | | W 9 | |
| Interlab sp. z o.o. | Warszawa | | N 27 | |
| INTROL | Katowice | | K 20 | |
| IPC | Gliwice | | Z 18 | |
| IPC DIGITAL | Gliwice | | Z 18 | |
| IVENDO | Iława | | Z 5 | |
| IZO-ERG | Gliwice | | K 4 | |
| JAKMET | Sobienki | | L2 22 | |
| Janaszek Electric | Warszawa | | L2 2 | |
| JD SYSTEM | Kraków | | N 30 | |
| JEAN MUELLER POLSKA | Warszawa | | M 3 | |
| JMP INTER | Bydgoszcz | | L6 2 | |
| K SYSTEM | Gdynia | | Z 10 | |
| KARED | Kowale | | A 25 | |
| KATKO | Nidzica | | G 26 | |
| KEMA Labs, a CESI division | Milan | Italy | O 6 | |
| Kingsine Electric | Shenzhen | China | O 25 | |
| KONTAKT-SIMON | Czechowice-Dziedzice | | A 50 | |
| KOPOS ELEKTRO PL SP. Z O.O. | Wrocław | | G 9 | |
| KORCZYK | Bielsko-Biała | | | |
| KORCZYK PLUS | Bielsko-Biała | | | |
| KPB INTRA POLSKA | Tychy | | A 5 | |
| KREATOR | Warszawa | | | |
| KROGI ELECTRIC | Wrocław | | M 12 | |
| KUVAG | Nepomuk | Czechia | W 22 | |
| LABARA SRO | Velká Bíteš | Czechia | M 1 | |
| LABORATORIUM KOMAG | Gliwice | | A 7 | |
| LAMEL ROZDZIELNICE | Żukowo | | L3 1a | |
| LEDOLUX POLAND | Głogów Małopolski | | O 15 | |
| LEF POLAND | Gliwice | | L2 5 | |
| Leica Geosystems | Warszawa | | L2 20 | |
| Lifton Polska | Zabrze | | L2 6 | |
| LIMATHERM SENSOR Sp. z o.o. | Limanowa | | N 25 | |
| LOGISTICS PACK | Czechowice-Dziedzice | | OZE 5 | OZE 8 |
| LONGKAI POWER | | China | Z 6 | |
| LOPI SP. Z O.O. | Legionowo | | O 19 | |
| ŁUKASIEWICZ - GIT | Gliwice | | A 74 | |
| ŁUKASIEWICZ - IEL | Warszawa | | A 74 | |
| ŁUKASIEWICZ - IMN | Gliwice | | A 74 | |
| ŁUKASIEWICZ - ITR | Warszawa | | G 6 | |
| ŁUKASIEWICZ - ITR | Warszawa | | A 74 | |
| ŁUKASIEWICZ - WIT | Warszawa | | A 74 | |
| ŁUKASIEWICZ - WIT - Branżowy Punkt Kontakowy | Warszawa | | A 74 | |
| ŁUKASIEWICZ EMAG | Katowice | | A 74 | |
| M4 Maszyny - VOLTA | Lubin | | L7 4 | |
| MACTRONIC | Wrocław | | K 1 | |
| MARKEL | Piaseczno | | W 18 | L6 13 |
| MARLANVIL SpA | Milan | Italy | W 16 | |
| MARONA | Pajęczno | | L3 3 | |
| MECCA POWER | | China | Z 24 | |
| MEDCOM | Warszawa | | A 18 | |
| Mefta Green Transfo | Mikołów | | O 9 | |
| MEGGER Sp. z o.o. | Stara Iwiczna | | G 21 | L6 6 |
| MERAWEX | Gliwice | | N 26 | |
| MERAZET SA | Poznań | | A 52 | |
| MERSERWIS | Warszawa | | W 33 | L6 11 |
| MERYTRONIC | | | G 3 | |
| METPOL WGMIE | Ląd Kolonia | | N 2 | |
| MFiPR | Warszawa | | Z 3 | |
| MG WIRES GROUP | Chybie | | O 22 | |
| MICROSYS | Ostrava-Vitkovice | Czechia | N 19 | |
| mierzymy.pl | Dębie Wielkie | | L2 20 | |
| MIESIĘCZNIK SEP INPE | Bełchatów | | | |
| MIKANIT | Warszawa | | K 15 | |
| MIKRONIKA | Poznań | | A 31 | A 31 |
| MILWAUKEE | Warszawa | | M 5 | |
| ML SYSTEM | Zaczernie | | L2 12 | |
| MOREK | Warszawa | | G 2 | |
| MULTI-TAB | Gdynia | | K 10 | |
| MUTLUSAN ELECTRIC | Ba ak ehir-istanbul | Turkey | W 1 | |
| NANJU POLYMER | Guangdong | China | O 27 | |
| NAPĘDY I STEROWANIE | Racibórz | | A 9 | |
| NCT S.A. | Wodzisław Śląski | | L3 10 | L3 1 |
| NDN | Warszawa | | K 21 | |
| NEXANS | Racibórz | | G 13 | |
| NIEDAX GROUP | Tarnowskie Góry | | G 28 | |
| NINGBO WORLD STAR | | China | Z 4 | |
| NOARK | Poznań | | A 19 | |
| NODIGMARKET24 | Zabrze | | L2 24a | |
| NRG PROJECT | Ksawerów | | OZE 10 | |
| NVENT ERIFLEX | Tilburg | Netherlands | L7 8 | |
| OBR ORAM | Łódź | | G 7 | |
| OLMEX KMB | Wójtowo | | A 55 | |
| OMICRON electronics GmbH | Sosnowiec | | L1 7 | |
| ORMAZABAL | Gliwice | | G 15 | |
| ORT | Myszków | | L2 8 | |
| OSPEL S.A. | Wierbka | | W 34 | |
| Panduit Europe Ltd | London | United Kingdom | W 26 | |
| PARTEX | Lubicz | | K 18 | |
| PASTUSZKO | Chwaszczyno | | M 14 | |
| PAWILON SZWAJCARSKI | Warszawa | | A 49 | |
| PCE POLSKA | Dzierżoniów | | G 18 | |
| PF ELECTRONIC Sp. z o.o. | Gliwice | | O 2 | |
| PFIFFNER POLSKA | Warszawa | | A 49 | |
| Pfisterer sp. z o.o. | Płochocin | | A 34 | |
| PGNiG OD Grupa Orlen | Warszawa | | L3 7 | |
| PHOENIX CONTACT | Wrocław | | G 19 | |
| PHOTOMATE POLSKA | Warszawa | | OZE 13 | |
| PLASTROL | Lotyń | | W 13 | |
| PLP POLAND (BELOS) S.A. | Bielsko-Biała | | A 17 | |
| PLUMETTAZ S.A. | Bex | Switzerland | O 13 | |
| POLCONTACT WARSZAWA | Warszawa | | K 17 | |
| POLLIN | Warszawa | | M 2 | |
| POLSKA IZBA KOLEI | Bydgoszcz | | W 5 | |
| POLTRADE -TECHNOLOGIES | Siemianowice Śląskie | | Z 25 | |
| POWER ENGINEERING TRANSFORMATORY | Czerwonak | | W 3 | |
| POZYTON | Częstochowa | | N 20 | |
| PRIMA-BUD | Sandomierz | | L3 9 | |
| PROMET | Sosnowiec | | G 10 | |
| PRONUTEC | Amorebieta (Vizcaya) | Spain | G 4 | |
| PROTEKT Łódź | Łódź | | G 12 | |
| PROTEKTEL | Przasnysz | | A 65 | |
| PRYSMIAN GROUP | Sokołów | | A 73 | |
| PSBE | Warszawa | | A 67 | |
| PSI POLSKA | Poznań | | A 66 | |
| PSME | Warszawa | | A 21a | |
| PSPA | Warszawa | | SEL 2 | |
| PTPIREE | Poznań | | A 71 | |
| PTWP-OnLine | Katowice | | | |
| PULSAR | Łapczyca | | W 4 | |
| Qoltec | Gliwice | | W 24 | |
| RABBIT Sp. z o.o. | Wrocław | | W 28 | |
| RATEART | Łódź | | O 9a | |
| RAWICOM SA | Łabiszyn | | L3 4 | |
| RELPOL | Żary | | A 13 | |
| Remontowa Lighting | Gdańsk | | Z 20 | |
| REMOR SOLAR POLSKA | Recz | | OZE 9 | |
| RENT | Warszawa | | L7 2 | |
| RITZ | Hamburg | Germany | L3 11 | |
| ROMGOS GRUPA | Jarocin | | L6 1 | |
| ROMOLD | Saaldorf-Surheim | Germany | N 13 | |
| Rongying Automation | | China | Z 26 | |
| ROTHLEHNER | Skawina | | L5 10 | |
| ROXTEC POLAND SP. Z O.O. | Gdynia | | N 5 | |
| RST | Białystok | | A 59 | |
| RST ROZTOCZE | Tomaszów Lubelski | | W 17 | |
| RTcom | Koszalin | | O 16 | |
| RYNEK ELEKTRYCZNY | Warszawa | | | |
| SAN-MAX Sp. z o.o. | Szczecin | | L2 23 | |
| SAREL POLSKA Sp. z o.o. | Niepołomice | | L2 1 | |
| SAVLO KOMPENSATORY | Kraków | | K 16 | L7 7 |
| Schneider Electric Polska | Warszawa | | O 11 | |
| SDÜNNGER POLSKA | Rybnik | | W 12 | |
| SEP | Warszawa | | A 68 | |
| SEP O. Bielsko-Bialski | Bielsko-Biała | | A 69 | |
| Serafin Maszyny | Przybysławice | | L5 8 | |
| SEZ DK a.s. | Dolný Kubin | Slovak Republic | N 15 | |
| SIBA POLSKA Sp. z o.o. | Stare Babice | | W 31 | |
| SIEĆ BADAWCZA ŁUKASIEWICZ | Warszawa | | A 74 | |
| SIGMA | Stambuł | Turkey | A 60 | |
| SIMET S.A. | Jelenia Góra | | A 15 | |
| SIMPAX | Piaski | | W 36 | |
| SINTUR Sp. z o.o. | Turek | | N 24 | |
| SITEL - CUBIS SYSTEMS | Warszawa | | W 20 | |
| SOCOMEC | Warszawa | | L2 9 | |
| SONEL S.A. | Świdnica | | A 27 | |
| SPAMEL | Twardogóra | | G 3 | |
| SPELSBERG GMBH + CO. KG | Schalksmühle | Germany | A 53 | |
| SPIE ELBUD GDAŃSK | Gdańsk | | A 40 | |
| SPIE Energotest | Gliwice | | A 40 | |
| STAR SAN DUO | Starachowice | | L6 8 | |
| STASIŃSKI | Częstochowa | | M 13 | |
| STEELER | Sokółka | | SEL 1 | |
| STELMET | Pstrągowa | | G 24 | |
| STYROBUD SPJ | Sokołów Małopolski | | L6 4 | |
| Sundoor Tech | Chorzów | | OZE 16 | |
| TABAL | Lublin | | W 2 | |
| TAT ECO | | | A 49 | |
| TAURON DYSTRYBUCJA S.A. | Kraków | | L5 1a | |
| TAURUS-TECHNIC Sp. z o.o. | Osielsko | | L1 8 | |
| TAVRIDA ELECTRIC POLSKA | Tychy | | A 6 | |
| TDM | Łuków | | L3 2a | |
| TECHNOKABEL | Warszawa | | G 31 | |
| TECPOLES | Krągola | | N 10 | L2 13 |
| TELERGON | | | G 3 | |
| TELTAR | Chmielów | | N 6 | |
| TELWOLT-BETON | Sandomierz | | L3 6 | |
| TELZAS SP. Z O. O. | Szczecinek | | A 28 | |
| Tesar Polska | Niepołomice | | W 19 | |
| TESPOL | Wrocław | | O 3 | |
| TEXSIM S.I. W MILICZU | Milicz | | N 3 | |
| TFKable | Myślenice | | A 21 | OZE 2 |
| TGG | | China | A 17 | |
| THIRARD POLSKA SP.z o.o. | Warszawa | | A 64 | |
| Thytronic | Milano | Italy | M 8 | |
| Tianli Electrical | Hangzhou | China | O 23 | |
| TM TECHNOLOGIE | Morawica | | W 6 | |
| TMC Transformers SpA | Busto Arsizio (VA) | Italy | L6 3 | |
| TME | Łódź | | W 27 | |
| TOMBIG | Brzeźno | | L2 21 | |
| TRAFECO | Boronów | | A 41 | |
| TRAFOSTACJE | Nadolice Wielkie | | L7 5 | |
| TRAFTA | Myszków | | L2 8 | |
| TRONIA | Warszawa | | O 5 | |
| TWELVE TECHNIKA ŚWIETLNA | Warszawa | | K 3 | |
| uesa Polska Sp. z o.o. | Lubsko | | N 22 | |
| ULAMEX | Tomaszów Mazowiecki | | Z 2 | |
| URZĄDZENIA DLA ENERGETYKI | Warszawa | | N 9 | |
| USTEC | Warszawa | | N 8 | |
| VON ROLL VR POLSKA | Smolec | | K 19 | |
| WAEL-bis | Kraków | | A 10 | |
| WAGO | Wrocław | | A 33 | |
| WAMTECHNIK | Warszawa | | A 48 | |
| WB GROUP | Ożarów Mazowiecki | | L5 3 | |
| WEIDÜMLLER | Warszawa | | L6 10 | |
| Wellwin Precision | Guangdong | China | O 26 | |
| Wiadomości Elektrotechniczne | Warszawa | | A 12 | |
| WIELAND ELECTRIC | Swadzim | | M 9 | |
| WINDEX ANDRZEJ ASZYK | Chojnice, Pawłówko | | L5 7 | |
| WIRE SOLUTIONS | Wrocław | | A 72 | |
| WISH POWER | | China | Z 8 | |
| WKK POLSKA SP. Z O.O. | Łódź | | A 4 | |
| Województwo Śląskie | Katowice | | A 79 | |
| WOJTAP | Częstochowa | | Z 28 | |
| WPŻ ELBUD GDAŃSK Sp. z o.o. | Łubiana | | L5 6 | |
| XCMG POLAND SP. z o. o. | Warszawa | | L7 3 | |
| ZAMEL | Pszczyna | | A 14 | |
| ZAPEL S.A. | Boguchwała | | A 22 | |
| ZAZ-En Sp. z o. o. | Siemianowice Śląskie | | N 7 | |
| ZEG-ENERGETYKA | Pszczyna | | A 14 | |
| ZIRCON POLAND Sp. z o.o. | Warszawa | | A 77 | |
| ZOE-GRUPA TECHNITEL | Zgierz | | N 16 | |
| ZPAS S.A. | Wolibórz | | A 47 | |
| ZPrAE Sp. z o.o. | Siemianowice Śląskie | | N 7 | |
| ZPUE SA | Włoszczowa | | L1 6 | |
| ZREW Tramsformatory | Łódź | | W 19 | |
| ZUP EMITER SP. Z O.O. | Limanowa | | L1 4 | |
| ZWAE Sp. z o.o. | Lębork | | A 23 | |
