0001104659-13-009692 4/A 1 20121231 20130212 20130212 Gerstein Irving Russell 0001489403 4/A 34 001-34691 13596905 200 CLARENDON STREET BOSTON MA 02116 ATLANTIC POWER CORP 0001419242 4900 550886410 A1 1231 ONE FEDERAL STREET FLOOR 30 BOSTON MA 02110 617-977-2400 ONE FEDERAL STREET FLOOR 30 BOSTON MA 02110 4/A 1 a4a.xml 4/A