Members O-P
| Member | ||
| Ok-Q8 AB | ||
| OK A.M.B.A | ||
|
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| Ompex AG | ||
| Optimax Energy GmbH | ||
| Osaühing VKG Energia | ||
| Ovako Bar AB | ||
| Ovako Bar Oy Ab | ||
| Oy AGA Ab | ||
| Oy Elkraft Finland Ab | ||
| Oy Perhonjoki Ab | ||
| Oy Turku Energia-Åbo Energi Ab | ||
| Oulun Energia Oy | ||
| PD Power Oy | ||
| Pohjois-Karjalan Sähkö Oy | ||
| Pori Energia Oy | ||
|
||
| Priogen Holding B.V. | ||
| Pure.energy GmbH | ||
| PVO Power Management Oy | ||
| PVO Power Services Oy | ||
| Quadra Energy GmbH |