Exhibit G-12

Units	Owner	Form of Ownership	Percentage Ownership
Conowingo	Exelon Generation	Stock Interest*	100 %
Eddystone 1-2	Exelon Generation	Fee Interest	100 %
Cromby 1	Exelon Generation	Fee Interest	100 %
Pennsbury 1-2	Exelon Generation	Fee Interest	100 %
Cromby 2	Exelon Generation	Fee Interest	100 %
Eddystone 3-4	Exelon Generation	Fee Interest	100 %
Fairless Hills	Exelon Generation	Fee Interest	100 %
Cromby 1C1	Exelon Generation	Fee Interest	100 %
Delaware 1	Exelon Generation	Fee Interest	100 %
Schuyhill 1, 10-11, 1C1	Exelon Generation	Fee Interest	100 %
Croydon	Exelon Generation	Fee Interest	100 %
Richmond	Exelon Generation	Fee Interest	100 %
Falls	Exelon Generation	Fee Interest	100 %
Moser	Exelon Generation	Fee Interest	100 %
Delaware 9-12	Exelon Generation	Fee Interest	100 %
Eddystone 10-40	Exelon Generation	Fee Interest	100 %
Southwark 3-6	Exelon Generation	Fee Interest	100 %
Chester 7-9	Exelon Generation	Fee Interest	100 %
Muddy Run	Exelon Generation	Fee Interest	100 %
Keystone 1-2	Exelon Generation	Fee Interest	20.99 %
Keystone	Exelon Generation	Fee Interest	20.99 %
Conemaugh 1-2	Exelon Generation	Fee Interest	20.72 %
Conemaugh	Exelon Generation	Fee Interest	20.72 %

^* Exelon Generation owns 100% of the stock Susquehanna Power Company, which owns the Conowingo unit.