| 3-ENERGY Sp. z o.o. | Warszawa | | W 26 | |
| 3N SOLUTIONS | Warszawa | | L1 2 | |
| 4U AUTOMATION | Bielsko-Biała | | Z 24 | |
| AARSLEFF | Warszawa | | T 5 | |
| ACS SYSTEMS | Kwidzyn | | O 21 | |
| AD MOTO | Siemianowice Śląskie | | L2 18 | |
| ADDEV MATERIALS | Żychlin | | W 33 | |
| ADT | Szamotuły | | Z 7 | |
| AE SOLUTION Sp. z o.o. | Gdańsk | | OZE 12 | |
| AFFS | Łomianki | | Z 17 | |
| AH HARDT | Liszki | | L2 21 | |
| AIM Project | Rączki | | G 29 | |
| AKS ZIELONKA | Kobyłka | | O 17 | |
| AKTYWIZACJA | Kraków | | A 45 | |
| Alfa Poland | Bielsko-Biała | | Z 1 | |
| Alfa Power | | | G 29 | |
| ALTRAFO POLSKA | Poznań | | W 19 | |
| AMISTON | Opole | | OZE 6 | |
| AMP POWER | Dębica | | T 33 | |
| ANDRA Sp. z o.o. | Warszawa | | A 72 | |
| ANDREW | Mszana Dolna | | Z 20 | |
| ANDRZEJ ASZYK WINDEX | Chojnice, Pawłówko | | L5 7 | |
| AOSIF ENGINEERING | | China | T 8 | |
| APA | Warszawa | | A 62 | |
| APAR Control | Raszyn | | K 5 | |
| APLISENS S.A. | Warszawa | | W 37 | |
| APS ENERGIA SA | Stanisławów Pierwszy | | A 26 | OZE 17 |
| ARMATEC | Warszawa | | G 9 | |
| ARTECHE | Mungia | Spain | A 65 | |
| ARTSMART/portal smart-grids.pl/ | Warszawa | | | |
| ASCO EQUIPMENT Sp. z o.o. | Tychy | | L2 4 | |
| ASKOM | Gliwice | | N 12 | |
| ASSECURO | Łazy k/Warszawy | | M 15 | |
| AST SYSTEM | Zielona Góra | | A 3 | |
| ASTAT - Automatyka przemysłowa | Poznań | | O 10 | |
| ASTAT - Energetyka | Poznań | | A 60 | L5 4 |
| ATEST GAZ | Gliwice | | W 4 | |
| ATLAS | Raszków | | L1 9 | |
| ATM LIGHTING | Gdańsk | | A 43 | |
| AUTOMATYKA | Warszawa | | A 2 | |
| AutomatykaB2B | | | A 62 | |
| AutomatykaOnline.pl | Warszawa | | A 2 | |
| AWEX | Masłomiąca | | A 51 | |
| BAKS | Karczew | | G 23 | G 24 |
| BALS-POLSKA | Brynica | | W 14 | |
| BANASZAK | Poznań | | N 4 | |
| BASE-IP | Katowice | | N 13 | |
| BEMKO Sp. z o.o. | Jawczyce | | L5 6a | |
| BENNING | Głosków | | G 17 | |
| BEZPOL | Myszków | | L2 7 | |
| BIALL | Gdańsk | | M 3 | |
| BLUMENBECKER H i S | Katowice/Opole | | W 34 | |
| Boplast Sp. z o.o. | Lębork | | A 58 | |
| BROTHER | Warszawa | | N 18 | |
| BUSCH POLSKA | Kraków | | O 20 | |
| C. C. JENSEN | Warszawa | | W 10 | |
| C.Z.E. Sp. z o.o. | Warszawa | | O 5 | |
| CABICON | Łódź | | T 15 | |
| CANTONI GROUP - EMIT S.A. | Cieszyn | | M 6 | |
| CAROLINA TOYOTA BIELSKO | Czechowice-Dziedzice | | SEL 1 | |
| CBI ELECTRIC / EMCOMP | Örebro | Sweden | T 24 | |
| CBM TECHNOLOGY | Niepruszewo | | A 8 | |
| CELLPACK Polska | Warszawa | | K 11 | |
| CELO | Konstantynów Łódzki | | O 9 | |
| CENTRUM ELEKTRYCZNE ANIA | Wieluń | | L5 5b | |
| Centrum Farb Przemysłowych | Miszewko | | T 31 | |
| CERBEX | Krosno | | T 7 | |
| CES | Podłęże | | A 39 | |
| CEW | Smolec | | K 17 | |
| ComAp | Praga 7 | Czech Republic | L1 1a | |
| COMPUTERS & CONTROL | Katowice | | A 79 | |
| Contec Kromiss | Krągola | | N 10 | |
| CONTRANS TI | Szewce | | A 24 | |
| COPA-DATA POLSKA | Kraków | | A 33 | |
| CORAB S.A. | Olsztyn | | OZE 11 | |
| COWEME SPA | Lazaro di Savena (BO) | Italy | M 1 | |
| CR GAMA SP. Z O.O. | Bielsko-Biała | | T 19a | |
| CUBIS-SYSTEMS / FILOFORM | Lurgan | United Kingdom | O 23 | |
| CZAH-POMIAR | Katowice | | K 5 | |
| DACPOL | Piaseczno | | A 31 | |
| DATA OPTICS POLAND | Opole | | Z 2 | |
| DEGSON TECHNOLOGY | NINGBO | China | N 30 | |
| DELTA ELECTRONICS | Warszawa | | A 49 | |
| DGT | Straszyn | | T 30 | |
| DIPOL | Kraków | | Z 33 | |
| DIY POWER SYSTEM | FUJIAN | China | T 9 | |
| DOKTORVOLT | Malichów | | A 48 | |
| DOLMAX | Lublin | | | |
| Dongturbo Electric | Chengdu | China | T 2 | |
| Druseidt, Paul | Remscheid | Germany | T 26 | |
| eaton | Gdańsk | | OZE 13 | |
| ecoGRAL | Czeladź | | T 11 | |
| EFEN sp. z o. o. | Czeladź | | G 28 | |
| EGE | Českē Budĕjovice | Czechia | A 60 | |
| EJ | Wienna | Austria | Z 21 | |
| EKOBOX SA | Zagnańsk | | M 12 | |
| EKO-TECH | Kalety | | Z 12 | |
| EKTO Sp. z o.o. | Zaścianki | | O 16 | |
| ELANTAS EUROPE | Hamburg | Germany | W 33 | |
| EL-BO KOMPENSACJA | Otwock | | W 8 | |
| ELECTRA POLSKA sp. z o.o. | Bydgoszcz | | G 30 | |
| ELECTRAPLAN | Piaseczno | | N 29 | |
| ELEKTRO BECOV | Bielsko-Biała | | O 11 | |
| ELEKTRO.INFO | Warszawa | | K 6 | |
| ELEKTROMETAL ENERGETYKA | Warszawa | | A 38 | |
| ELEKTROMETAL SA | Cieszyn | | G 18 | |
| ELEKTROMONTAŻ RZESZÓW SA | Rzeszów | | N 17 | L2 12 |
| ELEKTRONIK | Warszawa | | A 62 | |
| ElektronikaB2B | | | A 62 | |
| ELEKTROONLINE.PL | Białystok | | | |
| ELEKTRO-PLAST Opatówek | Opatówek | | N 21 | |
| ELEKTROSVIT | Grotniki | | L2 23 | |
| ELENCO | Jędrzejów | | L7 4 | |
| ELEXA | Łódź | | Z 8 | |
| ELGÓR + HANSEN S.A. | Chorzów | | A 6 | A 76 |
| ELHAND TRANSFORMATORY | Lubliniec | | A 15 | |
| ELKO-BIS Systemy Odgromowe | Wrocław | | L2 8 | |
| ELMA energia Sp. z o.o. | Olsztyn | | A 46 | |
| ELMARCO | Gdynia | | L1 5 | |
| ELMARK AUTOMATYKA S.A. | Warszawa | | O 13 | |
| Elmech | Pruszcz Gdański | | OZE 16 | |
| ELNORD | Reda | | N 1 | |
| ELPIO | Komorniki | | A 64 | |
| ELPLAST+ | Jastrzębie-Zdrój | | N 32 | |
| ELPRO Z O.O. | Pierwoszyno | | W 7 | |
| EL-PUK Sp. z o.o. | Konstantynów Łódzki | | G 21 | |
| ELQ SA | Częstochowa | | L2 9 | |
| ELSTA | Wieliczka | | OZE 9a | |
| EL-SUN SP. Z O.O. | Wieliczka | | OZE 4 | |
| ELTOM | Lębork | | L2 22 | |
| EMIT S.A. | Żychlin | | M 6 | |
| EMKA | Mysłowice | | G 26 | |
| ENAP SA | Kozienice | | A 26 | |
| ENCO | Warszawa | | L1 3 | |
| ENERGA-OPERATOR | Gdańsk | | A 40 | |
| ENERGETYKA.PLUS | Warszawa | | A 54 | |
| ENERGOTECH LUBLIN | Lublin | | G 12 | L3 1 |
| ENERGOTYTAN | Katowice | | K 21 | |
| Energy Partners | Dopiewo | | O 19 | |
| ENERSYS SP. Z O.O. | Bielsko-Biała | | A 49 | |
| ENERVISION | Bielsko-Biała | | W 17 | |
| ENVIBRA (DEWESOFT POLSKA) | Bielsko-Biała | | W 1 | |
| EP&M | Szczecinek | | A 56 | |
| ERGOM | Łódź | | A 36 | |
| ERKO | Jonkowo | | A 44 | |
| ESMETRIC Group | Warszawa | | A 70 | |
| ETA ENCLOSURES | Września | | O 8 | |
| ETAP IGE+XAO | Kraków | | O 2 | |
| ETC PLUS | Ostrowiec Świętokrzyski | | A 28 | |
| ETMAN INTERNATIONAL | Egersund | Norway | T 22 | |
| EURO PRO GROUP | Dzierżoniów | | G 2 | |
| EURODIS | Zamość k. Bydgoszczy | | A 75 | |
| EURO-ELEKTRO | Czeladź | | L2 10 | |
| EURO-LOCKS | Ruda Śląska | | N 14 | |
| EUROTRAFO Sp. z o.o. | Skierniewice | | Z 15 | |
| EUROWKRĘT | Radom | | N 24 | |
| EV VOLTA SP. Z O.O. | Słupsk | | T 19 | |
| EVOLTEC | Warszawa | | G 10 | |
| EXPLOSION POWER GMBH | Niederlenz | Switzerland | A 49 | |
| F&F Pabianice | Pabianice | | N 11 | |
| FACHOWY ELEKTRYK | Libiąż | | A 1 | |
| FAEN Sp. z o.o. | Nowa Wieś Lęborska | | W 29 | L5 10 |
| Famatel | Bielawa | | K 15 | |
| FCI | | Hungary | A 16 | |
| FIAMM EnergyTechnology | Montecchio Maggiore (VI) | Italy | A 11 | |
| FIBOX | Warszawa | | A 61 | |
| FIJALO-POLAND | Człuchów | | L2 3 | |
| FINDER POLSKA Sp. z o.o. | Sady | | A 57 | L5 1 |
| Forbox | Toruń | | T 17 | |
| FOXYTECH SP. Z O.O. | Świdnica | | A 27 | |
| FTZ | Żychlin | | K 7 | |
| FUIJAN NEW HONGFU MOTOR CO., LTD | | China | Z 9 | |
| FUIJAN XINHENGXIN MOTOR CO., LTD | | China | Z 6 | |
| G&W Electric | | | G 29 | |
| GAZEX | Warszawa | | W 24 | |
| GE VERNOVA | | | A 14 | |
| GENWAY | Płock | | T 21 | |
| GERDA | Sokołów | | Z 16 | |
| GIRA | Warszawa | | A 1 | |
| GRACO Sp. z o.o. | Warszawa | | L2 11 | |
| GRODNO S.A. | Michałów Grabina | | OZE 13 | |
| GROMTOR | Wrocław | | L2 13 | |
| GRUPA MCC | Warszawa | | W 5 | |
| GTV Poland | Pruszków | | OZE 2 | |
| GUENTHER POLSKA SP. Z O.O. | Długołęka | | W 13 | |
| HAEFELY AG | Bazylea | Switzerland | A 49 | |
| HAPAM Poland | Łódź | | W 17 | |
| HARTING POLSKA SP ZOO | Wrocław | | L6 7 | |
| HAUFF-TECHNIK | Hermaringen | Germany | K 12 | |
| HDW Polska | Bronisze | | L3 4 | |
| HELIOS STRATEGIA | Oleśnica | | T 14 | |
| HELLERMANNTYTON | Słupca | | A 30 | |
| Helmar | Warszawa | | A 49 | |
| HELUKABEL POLSKA | Radziejowice | | O 18 | |
| HENSEL POLSKA | Poznań | | G 4 | |
| HENSWELL ELECTRIC Co., Ltd | | China | Z 23 | |
| Herrmann Ultraschall | Karlsbad | Germany | O 24 | |
| HEWALEX | Czechowice-Dziedzice | | OZE 9 | |
| HEWEA | Mirków | | L6 1 | |
| Hiab Poland | Stargard | | L5 6 | |
| HIKVISION | Warszawa | | O 12 | |
| Hitachi Energy | Warszawa | | A 19 | L5 3 |
| HKL Maszyny Budowlane | Poznań | | L7 1 | |
| HMF POLSKA Sp. z o.o. | Pisary | | L6 8 | |
| HOKE S.C. | Chorzelów | | L2 15 | |
| HOPPECKE | Śródka | | A 37 | |
| HUBIX SP. Z O.O. | Huta Żabiowolska | | K 2 | |
| IASE | Wrocław | | A 55 | |
| IDE ELECTRIC | Bielsko Biała | | O 11 | |
| IEN-PIB | Warszawa | | A 16 | |
| IEN-PIB O/GDAŃSK | Gdańsk | | A 16 | |
| IEN-PIB ZD BIAŁYSTOK | Białystok | | A 16 | |
| IGUS | Warszawa | | K 13 | |
| IMEFY POLSKA | Świebodzice | | M 10 | |
| IMPACT | Warszawa | | A 7 | |
| INCOBEX SP. Z O.O. | Bielsko-Biała | | Z 18 | |
| Industrooprema | Sesvete | Croatia | Z 4 | |
| INNOTECHNIKA | Gdynia | | W 12 | |
| INNOVATOR Sp. z o.o. | Gliwice | | OZE 1 | |
| INOVA | Lublin | | Z 14 | |
| Interlab | Warszawa | | G 15 | |
| INTERNATIONAL WIRE POLSKA | Dąbrowa Górnicza | | Z 10 | |
| INTROL | Katowice | | K 19 | |
| IPC | Gliwice | | N 28 | |
| Izo-Erg sp. z o.o. | Gliwice | | K 4 | |
| JAINGSU YAWEI TRANSFORMER CO., LTD | | China | Z 11 | |
| JAKMET | Osieck | | L2 20 | |
| JD SYSTEM | Kraków | | N 31 | |
| JEAN MUELLER POLSKA | Warszawa | | M 7 | |
| JUSTPOWER EQUIPMENT | FUJIAN | China | T 6 | |
| KARED | Kowale | | A 25 | |
| KATKO | Nidzica | | O 4 | |
| Kingsine Electric | Shenzhen | China | T 4 | |
| KLGS SP. Z O.O. | Pcim | | Z 29 | |
| KME | Dolny Kubin | Slovak Republic | W 28 | |
| KOBEX | Kamień | | L3 5 | |
| KOMAG | Gliwice | | T 3 | |
| KOMPENSATORY TMSYS | Kraków | | Z 22 | |
| KONTAKT-SIMON S.A. | Czechowice-Dziedzice | | A 50 | |
| KORCZYK PLUS | Bielsko-Biała | | SEL 2 | |
| KPB INTRA POLSKA | Tychy | | A 5 | |
| KROGI ELECTRIC SP. Z O.O. | Wrocław | | M 5 | |
| KUVAG | Nepomuk | Czechia | W 25 | |
| LABARA SRO | Velká Bíteš | Czechia | M 1 | |
| LAMBERT POWER | Weifang | China | M 11 | |
| LAMEL ROZDZIELNICE SP Z O.O. | Żukowo | | G 8 | L6 4 |
| LAPP KABEL Sp. z o. o. | Kobierzyce | | G 1 | |
| leddriver.eu | Racibórz | | G 27 | |
| LEDOLUX POLAND | Głogów Małopolski | | O 22 | |
| LEDVANCE | Warszawa | | OZE 15 | |
| LEF POLAND | Gliwice | | L2 5 | |
| LEGRAND | Ząbkowice Śląskie | | L1 1 | |
| Leica Geosystems | Warszawa | | L3 6 | |
| LEMAITRE SÉCURITÉ | La Walck | France | G 7 | |
| Lifton Polska | Gliwice | | L2 6 | |
| LIMATHERM SENSOR Sp. z o.o. | Limanowa | | N 23 | |
| LOPI | Legionowo | | W 21 | |
| ŁUKASIEWICZ - ITR | Warszawa | | G 5 | |
| M.S. - TRONIK | Kutno | | N 5 | |
| M4 Maszyny - VOLTA | Lubin | | L2 2 | |
| MACTRONIC Group SP. Z O.O. | Wrocław | | K 1 | |
| MAKITA | Bielsko-Biała | | T 25 | |
| MAREL DOO | Krusevac | Serbia | Z 19 | |
| MARKER Sp. z o.o. | Pruszków | | Z 5 | |
| MEDCOM | Warszawa | | A 17 | |
| Mefta GreenTransfo | Mikołów | | O 28 | |
| MEGGER Sp. z o.o. | Stara Iwiczna | | G 22 | L6 3 |
| MERAWEX | Gliwice | | N 27 | |
| MERAZET | Poznań | | A 52 | |
| MERSEN | Kraków | | K 10 | |
| MERSERWIS | Warszawa | | W 18 | |
| MERYTRONIC | Amorebieta | Spain | G 3 | |
| METPOL WGMIE | Ląd Kolonia | | N 2 | |
| MG WIRES GROUP | Katowice | | T 34 | |
| MGM PROJEKT | Katowice | | L7 5 | |
| MICHAUD | Viriat | France | T 16 | |
| MICRORISC S.R.O. | Jicin | Czechia | Z 30 | |
| MICROSYS | Ostrava-Vitkovice | Czechia | N 19 | |
| mierzymy.pl | Dębie Wielkie | | L3 6 | |
| MIKANIT | Warszawa | | K 14 | |
| MIKRONIKA | Poznań | | A 32 | A 32 |
| ML SYSTEM | Zaczernie | | Z 13 | |
| MULTI-TAB | Gdynia | | K 16 | |
| NAPĘDY I STEROWANIE MIESIĘCZNIK | Racibórz | | A 9 | |
| NCT S.A. | Wodzisław Śląski | | L3 8 | L3 2 |
| NDN | Warszawa | | W 23 | |
| NECKS IMP | Lubicz Dolny | | T 18a | |
| NEX GROUP | Halinów | | L2 19 | |
| NEXANS | Racibórz | | G 14 | |
| NIKDIM LTD. | Kazaniak | Bulgaria | W 16 | |
| NINGBO WORLD STAR IMP, & EXP. CO. LTD | | China | Z 25 | |
| NOARK ELECTRIC | Poznań | | A 18 | |
| NO-EL SP. J. | Katowice | | O 1 | |
| NOVUM-ELECTRIC | Rzeszów | | L7 3 | |
| NT SYSTEM | Gliwice | | O 3 | |
| OEM AUTOMATIC | Warszawa | | Z 14 | |
| OLMEX S.A. | Wójtowo | | A 14 | |
| OMICRON electronics GmbH | Sosnowiec | | L1 7 | |
| ORAM | Łódź | | G 6 | |
| ORMAZABAL POLSKA | Gliwice | | G 16 | |
| ORT | Myszków | | L2 7 | |
| ORTA | Myszków | | L2 7 | |
| OSPEL S.A. | Wierbka | | W 36 | |
| PARTEX | Lubicz | | K 8 | |
| PAWILON SZWAJCARSKI | Warszawa | | A 49 | |
| PCE POLSKA | Dzierżoniów | | G 19 | |
| PF ELECTRONIC Sp. z o.o. | Gliwice | | O 27 | |
| PFIFFNER POLSKA | Warszawa | | A 49 | |
| Pfisterer sp. z o.o. | Płochocin | | A 35 | |
| PHOENIX CONTACT | Wrocław | | G 20 | |
| PHOTOMATE POLSKA | Warszawa | | OZE 10 | |
| PLAMEN D O.O. | Indjija | Serbia | T 23 | |
| PLP POLAND (BELOS) S.A. | Bielsko-Biała | | A 16 | L5 1a |
| POKÓJ S.E. | Łódź | | Z 26 | |
| POLCONTACT WARSZAWA | Warszawa | | K 9 | |
| POLLIN | Warszawa | | M 13 | |
| POLSKA IZBA KOLEI | Bydgoszcz | | W 6 | |
| POLTRADE -TECHNOLOGIES | Siemianowice Śląskie | | O 26 | |
| POWER ENGINEERING TRANSFORMATORY | Czerwonak | | W 3 | |
| POWER SP. z o.o. | Siemianowice Śląskie | | T 20 | |
| Power Trafo Components | Paniówki | | M 17 | |
| POZYTON | Częstochowa | | N 20 | |
| PPUH PRIMA-BUD | Sandomierz | | L3 7 | |
| PREbiel | Liszki k/Krakowa | | L5 5 | |
| PROMET | Sosnowiec | | G 11 | |
| PRONUTEC | Amorebieta (Vizcaya) | Spain | G 3 | |
| PROTEKT | Łódź | | G 13 | |
| PROTEKTEL | Przasnysz | | A 65 | |
| PRYSMIAN | Sokołów | | A 83 | |
| PSBE | Warszawa | | A 67 | |
| PSI POLSKA | Poznań | | A 66 | |
| PSME | Warszawa | | A 29 | |
| PTPIREE | Poznań | | A 71 | |
| R&M | Warszawa | | L2 14 | |
| RABBIT Sp. z o.o. | Wrocław | | W 32 | |
| RADIOLEX | Gdańsk | | A 74 | |
| RADPOL | Człuchów | | W 30 | |
| RATEART | Łódź | | N 26 | |
| Rawlplug | Wrocław | | M 4 | |
| RELCON POLSKA | Wrocław | | Z 32 | |
| RELPOL | Żary | | A 12 | |
| Remontowa Lighting | Gdańsk | | W 15 | |
| RITZ | Hamburg | Germany | L3 9 | |
| ROTHLEHNER | Skawina | | L5 8 | |
| ROXTEC POLAND SP. Z O.O. | Rumia | | N 6 | |
| RST | Białystok | | A 59 | |
| RST ROZTOCZE | Tomaszów Lubelski | | W 20 | |
| RTcom | Koszalin | | T 12 | |
| RUNPOTEC | Thalgau | Austria | K 21 | |
| Salwis Telemechanika OZE | Kraków | | T 29 | |
| SAREL POLSKA Sp. z o.o. | Niepołomice | | L2 1 | |
| SDÜNNGER POLSKA | Rybnik | | W 9 | |
| SEP | Warszawa | | A 82 | |
| SEPA-TECH GMBH | Engen | Germany | L2 16 | |
| SEZ DK a.s. | Dolný Kubin | Slovak Republic | N 15 | |
| SGB-SMIT TRAMSFORMERS POLSKA | Łódź | | T 1 | |
| SHAANXI VICTORY ELECTRIC CO., LTD | | China | Z 31 | |
| Shanghai Goodrun | Shang Hai | China | M 14 | |
| SHENHONG METAL CO., LTD | | China | Z 28 | |
| SIBA POLSKA Sp. z o.o. | Stare Babice | | W 35 | |
| SIMPAX | Piaski | | W 38 | |
| SINTUR Sp. z o.o. | Turek | | N 25 | |
| SITEL - CUBIS SYSTEMS | Warszawa | | W 27 | |
| SLAVITECH SP. Z O.O. | Warszawa | | M 5 | M 9 |
| SOLARBOX | Modena | Italy | O 14 | |
| SOLFINITY | Warszawa | | T 13 | |
| SONEL S.A. | Świdnica | | A 27 | |
| SPELSBERG GMBH + CO. KG | Schalksmühle | Germany | A 53 | |
| SPIE | Gdańsk | | A 41 | |
| SPIE ELBUD GDAŃSK S.A. | Gdańsk | | A 41 | |
| SPIE Energotest | Gliwice | | A 41 | |
| SSEL | | | A 16 | |
| STAR SAN DUO | Starachowice | | L6 5 | |
| STASIŃSKI | Częstochowa | | M 16 | |
| STAUBLI | Smardzew | | O 15 | |
| STEELER | Sokółka | | SEL 1 | |
| STEGO POLSKA | Sosnowiec | | O 6 | |
| STELMET | Pstrągowa | | G 25 | |
| STENERG | Kamień | | L3 5 | |
| STOWARZYSZENIE ENERGETYKA BEZPIECZNA | Kraków | | T 18 | |
| STYROBUD | Sokołów Małopolski | | L6 2 | |
| Sundoor Tech | Chorzów | | OZE 14 | |
| SUNNEW ENERGY | | | OZE 1 | |
| SZANSA | Bielsko-Biała | | Z 27 | |
| TABAL | Lublin | | W 2 | |
| TAT ECO | Warszawa | | A 49 | |
| TAURON DYSTRYBUCJA S.A. | Kraków | | L5 9 | |
| TAURUS - TECHNIC Sp. z o.o. | Osielsko | | L1 8 | |
| TDM Sp. z o.o. | Łuków | | L3 3 | |
| TECHNO METAL POST | Szczecin | | T 27 | |
| TECHNOKABEL S.A | Warszawa | | G 31 | L6 3a |
| TECPOLES | Stare Miasto | | N 10 | |
| TELERGON | Zaragoza | Spain | G 3 | |
| TELTAR | Chmielów | | N 7 | |
| TELZAS SP. Z O. O. | Szczecinek | | A 28 | |
| "TEXSIM" S.I. W MILICZU | Milicz | | N 3 | |
| TEZANA | Stare Babice | | O 25 | L2 17 |
| TFKable | Myślenice | | A 21 | OZE 3 |
| TGG | | China | A 16 | |
| THP | Wrocław | | A 69 | |
| TIGA-CYNK | Legnica | | T 27 | |
| TM TECHNOLOGIE | Morawica | | A 80 | |
| TME | Łódź | | W 31 | |
| TRAFECO | Boronów | | A 42 | |
| TRAFTA | Myszków | | L2 7 | |
| TREND Networks | Gdynia | | K 20 | |
| TT PLAST SA | Kłaj | | N 16 | |
| Turbiny Neuronowe | Gliwice | | OZE 8a | |
| TWELVE TECHNIKA ŚWIETLNA | Warszawa | | K 3 | |
| UBB | Bielsko-Biała | | A 46a | |
| uesa Polska Sp. z o.o. | Lubsko | | N 22 | |
| URZĄDZENIA DLA ENERGETYKI | Warszawa | | K 18 | |
| USTEC | Warszawa | | N 9 | |
| VIGKOO INTELLIGENT | FUJIAN | China | T 10 | |
| Vimap Sp. z o.o. | Olsztyn | | A 68 | |
| VISAVENTO AG | Fravenfeld | Switzerland | A 49 | |
| VOLTAR SYSTEM SP. Z O.O. | Tychy | | M 2 | |
| VOLTROG | Mikołów | | T 32 | |
| VOLZ®TAPES | Gniezno | | W 11 | |
| VR POLSKA | Smolec | | K 17 | |
| WAEL-bis | Kraków | | A 10 | |
| WAGO | Wrocław | | A 34 | |
| WB GROUP | Ożarów Mazowiecki | | O 7 | |
| WEIDÜMLLER | Warszawa | | L6 6 | |
| WENZHOU WANGKE TRADING CO., LTD | | China | Z 3 | |
| Wiadomości Elektrotechniczne | Warszawa | | A 63 | |
| WIELAND ELECTRIC | Swadzim | | M 8 | |
| WIHA | Schonach | Germany | K 21 | |
| WIRE SOLUTIONS | Wrocław | | A 73 | |
| WKK POLSKA SP. Z O.O. | Łódź | | A 4 | |
| WUHAN | | China | A 16 | |
| Wydawnictwo WPIIB | Warszawa | | A 81 | |
| XCMG POLAND SP. z o. o. | Warszawa | | L7 2 | |
| ZAMEL | Pszczyna | | A 13 | |
| ZAPEL S.A. | Boguchwała | | A 22 | |
| ZAZ-En Sp. z o.o. | Siemianowice Śląskie | | N 8 | |
| ZEG-ENERGETYKA | Pszczyna | | A 13 | |
| Zielona Energia | Kraków | | | |
| ZIRCON POLAND Sp. z o.o. | Warszawa | | A 78 | |
| ZPAS S.A. | Wolibórz | | A 47 | |
| ZPrAE Sp. z o.o. | Siemianowice Śląskie | | N 8 | |
| ZPUE SA | Włoszczowa | | L1 6 | |
| ZREW Tramsformatory | Łódź | | W 22 | |
| ZUP EMITER SP. Z O.O. | Limanowa | | L1 4 | |
| ZWAE Sp. z o.o. | Lębork | | A 23 | |
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