0001387131-20-011921 8-K 1 20201229 5.02 20201229 20201229 ATLANTIC POWER CORP 0001419242 4900 550886410 A1 1231 8-K 34 001-34691 201423220 3 ALLIED DRIVE SUITE 155 DEDHAM MA 02026 617-977-2400 3 ALLIED DRIVE SUITE 155 DEDHAM MA 02026 8-K 1 at-8k_122920.htm CURRENT REPORT