Dominion Poweris a publicly traded company. SECO is a Cooperative such as the Northern Virginia Cooperative that I used to belong to in N VA.......WE Bought power from "D" as well as other sources. As a member of SECO, the cooperative, you are already an owner and after a period of years you will start to get dividends returned to you for the power you have used. Follow this link to see how a cooperative works....
http://www.secoenergy.com/co-ops.html .