| Symbol | Name | Country | Exchange |
|---|---|---|---|
| WVJ | AB Kauno Energija | DE | STU |
| WVJ | AB Kauno Energija | DE | MU |
| X92 | ZAZZ ENERGY OF SWEDEN B | DE | F |
| XEL | Xcel Energy Inc. | US | NASDAQ |
| XSG | Saibu Gas Holdings Co.Ltd | DE | F |
| YKENP | Public joint stock company Yakutskenergo | RU | MCX |
| YORW | The York Water Company | US | NASDAQ |
| YRSBP | Public Joint Stock Company TNS Energo Yaroslavl RUB1 PRF(USD) | RU | MCX |
| YU | Yu Group PLC | UK | LSE |
| ZOREN | Zorlu Enerji Elektrik Uretim AS | TR | IS |
| ZW1 | DALA ENERGI AB CL.A | DE | F |