| Name | Account holder number (AIB code) | Type | Authorized issuing body |
| AKZ INFRA, s. r. o. | 20XAKZINF8 | Supplier | OKTE |
| AUTONOVA, s. r. o. | 20XAUTNOVV | Producer | OKTE |
| Axpo Solutions AG | 20XAXPOSK3 | Supplier | OKTE |
| BEZ TRANSFORMÁTORY, a.s. | 20XBEZTRSR | Supplier | OKTE |
| Bóna LABELS, s.r.o. | 20XBONLAB[ | Producer | OKTE |
| CBA VEREX, a.s. | 20XCBAVERG | Supplier | OKTE |
| CBA VEREX, a.s. | 20XCBAVERG | Producer | OKTE |
| CD - profil s.r.o. | 20XCDPROFB | Producer | OKTE |
| CHETRA SK, s. r. o. | 20XCHETRAZ | Producer | OKTE |
| ČEZ, a.s. | 20XCEZCZAS | Supplier | OKTE |
| ČEZ, a.s. | 20XCEZCZAS | Auction participant | OKTE |
| Delta Electronics (Slovakia), s.r.o. | 20XDELTAEI | Auction participant | OKTE |
| Delta Electronics (Slovakia), s.r.o. | 20XDELTAEI | Supplier | OKTE |
| DHOLLANDIA CENTRAL EUROPE s.r.o. | 20XDHCEEUP | Producer | OKTE |
| Didaktik, družstvo | 20XDIDADR3 | Producer | OKTE |
| Druhá levická kontrolná spol. s r.o. | 20XDRLEKOM | Producer | OKTE |
| Econ KF s.r.o. | 20XECONKF[ | Producer | OKTE |
| EDS International SK, s. r. o. | 20XEDSISKW | Supplier | OKTE |
| EDS International SK, s. r. o. | 20XEDSISKW | Auction participant | OKTE |
| ELGAS, s.r.o. | 20XELGASK4 | Auction participant | OKTE |
| ELGAS, s.r.o. | 20XELGASK4 | Supplier | OKTE |
| Energie2, a.s. | 20XENERG26 | Auction participant | OKTE |
| Energie2, a.s. | 20XENERG26 | Supplier | OKTE |
| ENERGY DISTRIBUTION a.s. | 20XENEDIS4 | Auction participant | OKTE |
| ENERGY DISTRIBUTION a.s. | 20XENEDIS4 | Supplier | OKTE |
| ENERGY ONE, s. r. o. | 20XENEONE9 | Supplier | OKTE |
| EP ENERGY TRADING, a.s., organizačná zložka | 20XEPETSKM | Supplier | OKTE |
| ESCO Distribučné sústavy a.s. | 20XCEZDSA9 | Supplier | OKTE |
| EUROPA CENTER, s. r. o. | 20XEURCENV | Auction participant | OKTE |
| EUROPA CENTER, s. r. o. | 20XEURCENV | Supplier | OKTE |
| EUROPA SC a.s. | 20XEUROSCZ | Auction participant | OKTE |
| EUROPA SC a.s. | 20XEUROSCZ | Supplier | OKTE |
| FINEZ a.s. | 20XFINEZAZ | Producer | OKTE |
| G&E Trading, a.s. | 20XGANDETX | Supplier | OKTE |
| GRAND POWER, s.r.o. | 20XGRAPOWK | Producer | OKTE |
| GREEN ENERGY CEROVÁ, s.r.o. | 20XGRENCE8 | Producer | OKTE |
| green energy slovakia, s.r.o. | 20XGRENSLI | Producer | OKTE |
| Greenlogy a.s. | 20XGREENLX | Auction participant | OKTE |
| Greenlogy a.s. | 20XGREENLX | Supplier | OKTE |
| HEC Services II, s. r. o. | 20XHECSK2X | Supplier | OKTE |
| HEC Services II, s. r. o. | 20XHECSK2X | Auction participant | OKTE |
| HEC Services, s. r. o. | 20XHECSK1Z | Supplier | OKTE |
| HEC Services, s. r. o. | 20XHECSK1Z | Auction participant | OKTE |
| HORNBACH – Baumarkt SK spol. s r.o. | 20XHORNBA1 | Producer | OKTE |
| HTMAS s.r.o | 20XHTMAS1F | Auction participant | OKTE |
| HTMAS s.r.o | 20XHTMAS1F | Supplier | OKTE |
| HYDINA KUBUS s. r. o. | 20XHYDKUB[ | Producer | OKTE |
| HYDRO-ENERGY a.s. | 20XHYDENE3 | Producer | OKTE |
| ISTROCENTRUM s. r. o. | 20XISTROC9 | Auction participant | OKTE |
| ISTROCENTRUM s. r. o. | 20XISTROC9 | Supplier | OKTE |
| KAFFEX, spoločnosť s ručením obmedzeným | 20XKAFFEXT | Producer | OKTE |
| KLF-ENERGETIKA, a.s. | 20XKLFENEE | Supplier | OKTE |
| KORD SIPOX a.s. | 20XKORDSIP | Producer | OKTE |
| KORD SIPOX a.s. | 20XKORDSIP | Supplier | OKTE |
| KRON ENERGY, s. r. o. | 20XKROENE5 | Auction participant | OKTE |
| KRON ENERGY, s. r. o. | 20XKROENE5 | Supplier | OKTE |
| KRONOSPAN, s.r.o. | 20XKRNSPN2 | Producer | OKTE |
| Lakeside Office 1, a. s. | 20XLAKEO1Z | Supplier | OKTE |
| Leitech s. r. o. | 20XLEITEC5 | Producer | OKTE |
| Lindner Immo Slovakia s.r.o. | 20XLINIMSG | Supplier | OKTE |
| Liptovská vodárenská spoločnosť, a.s. | 20XLIPVODE | Producer | OKTE |
| MAGNA ENERGIA a.s. | 20XMAGNAES | Auction participant | OKTE |
| MAGNA ENERGIA a.s. | 20XMAGNAES | Supplier | OKTE |
| MedAgro, s. r. o. | 20XMEDAGRR | Producer | OKTE |
| MET Slovakia, a.s. | 20XMETSLOA | Supplier | OKTE |
| MET Slovakia, a.s. | 20XMETSLOA | Auction participant | OKTE |
| Metsa Tissue Slovakia s.r.o. | 20XMETSSAH | Supplier | OKTE |
| MINERÁLNE VODY a.s. | 20XMINVODH | Producer | OKTE |
| Mondi SCP, a.s. | 20XMONSCP5 | Auction participant | OKTE |
| Mondi SCP, a.s. | 20XMONSCP5 | Supplier | OKTE |
| Mondi SCP, a.s. | 20XMONSCP5 | Producer | OKTE |
| Muehlbauer Technologies s.r.o. | 20XMUEHLBN | Producer | OKTE |
| MVE OPÁTSKE, spol. s r.o | 20XMVEOPAF | Producer | OKTE |
| MVE Želiezovce s. r. o. | 20XMVEZELI | Producer | OKTE |
| MVM CEEnergy Slovakia s.r.o. | 20XMFGKSKG | Supplier | OKTE |
| MVM CEEnergy Slovakia s.r.o. | 20XMFGKSKG | Auction participant | OKTE |
| OC PREŠOV, s.r.o. | 20XOCPRES9 | Supplier | OKTE |
| OFZ, a.s. | 20XOFZSVKA | Supplier | OKTE |
| OFZ, a.s. | 20XOFZSVKA | Auction participant | OKTE |
| OKTE, a.s. | 20XOKTEAS5 | Market operator | OKTE |
| Oxygene, s. r. o. | 20XOXYGEN[ | Producer | OKTE |
| Pow-en a. s. | 20XPOWENAS | Supplier | OKTE |
| Pow-en a. s. | 20XPOWENAS | Auction participant | OKTE |
| Power Solutions, s.r.o. | 20XPOWSOLJ | Auction participant | OKTE |
| Power Solutions, s.r.o. | 20XPOWSOLJ | Supplier | OKTE |
| PPA Power DS s.r.o. | 20XPPAPDSA | Supplier | OKTE |
| Priemyselný park Poprad, s.r.o. | 20XPPPSROX | Supplier | OKTE |
| Red Forest, s. r. o. | 20XREDFORK | Supplier | OKTE |
| Red Forest, s. r. o. | 20XREDFORK | Auction participant | OKTE |
| RESPECT ENERGY S.A. | 20XRESENEE | Supplier | OKTE |
| RESPECT ENERGY S.A. | 20XRESENEE | Auction participant | OKTE |
| Rettenmeier Tatra Timber, s.r.o. | 20XRETATIZ | Producer | OKTE |
| RIGHT POWER, a.s. | 20XRIGPOW3 | Auction participant | OKTE |
| RIGHT POWER, a.s. | 20XRIGPOW3 | Supplier | OKTE |
| RODACH, s.r.o. | 20XRODACH[ | Producer | OKTE |
| SL - TRADE, s.r.o. | 20XSLTRADL | Producer | OKTE |
| Slovenské elektrárne - energetické služby, s.r.o. | 20XSELENSE | Supplier | OKTE |
| Slovenské elektrárne - energetické služby, s.r.o. | 20XSELENSE | Auction participant | OKTE |
| Slovenské elektrárne, a.s. | 20XSLOELER | Auction participant | OKTE |
| Slovenské elektrárne, a.s. | 20XSLOELER | Producer | OKTE |
| Slovenské elektrárne, a.s. | 20XSLOELER | Supplier | OKTE |
| Slovenský plynárenský priemysel, a.s. | 20XSPPAASJ | Supplier | OKTE |
| Slovenský plynárenský priemysel, a.s. | 20XSPPAASJ | Auction participant | OKTE |
| Spanner SK, k.s. | 20XSPANSK4 | Producer | OKTE |
| Spilatex, s. r. o. | 20XSPILAT8 | Producer | OKTE |
| SSE - MVE, s.r.o. | 20XSSEMVE9 | Producer | OKTE |
| STADREKO, s.r.o. | 20XSTADREZ | Producer | OKTE |
| Stredoslovenská energetika, a.s. | 20XSSENAS4 | Trader | OKTE |
| Stredoslovenská energetika, a.s. | 20XSSENAS4 | Auction participant | OKTE |
| Stredoslovenská energetika, a.s. | 20XSSENAS4 | Supplier | OKTE |
| VeCom SK, a.s. | 20XVECOMS1 | Supplier | OKTE |
| VeCom SK, a.s. | 20XVECOMS1 | Auction participant | OKTE |
| V-Elektra Slovakia, a.s. | 20XVELESKU | Supplier | OKTE |
| V-Elektra Slovakia, a.s. | 20XVELESKU | Auction participant | OKTE |
| Veolia Utilities Žiar nad Hronom, a.s. | 20XVEUTZHI | Supplier | OKTE |
| Veolia Utilities Žiar nad Hronom, a.s. | 20XVEUTZHI | Producer | OKTE |
| Veolia Utilities Žiar nad Hronom, a.s. | 20XVEUTZHI | Auction participant | OKTE |
| VODOHOSPODÁRSKA VÝSTAVBA, ŠTÁTNY PODNIK | 20XVVBSKKI | Producer | OKTE |
| VODOHOSPODÁRSKA VÝSTAVBA, ŠTÁTNY PODNIK | 20XVVBSKKI | Auction participant | OKTE |
| VODOHOSPODÁRSKA VÝSTAVBA, ŠTÁTNY PODNIK | 20XVVBSKKI | Supplier | OKTE |
| Východoslovenská energetika, a.s. | 20XVSENASJ | Auction participant | OKTE |
| Východoslovenská energetika, a.s. | 20XVSENASJ | Supplier | OKTE |
| ZSE Energia, a.s. | 20XZSEENEG | Producer | OKTE |
| ZSE Energia, a.s. | 20XZSEENEG | Auction participant | OKTE |
| ZSE Energia, a.s. | 20XZSEENEG | Supplier | OKTE |
| ZSE MVE, s. r. o. | 20XZSEMVEW | Producer | OKTE |