9999999995-21-001986 EFFECT 1 20210518 20210519 20210518 ATLANTIC POWER CORP 0001419242 4900 550886410 A1 1231 EFFECT 33 333-245462 21938324 3 ALLIED DRIVE SUITE 155 DEDHAM MA 02026 617-977-2400 3 ALLIED DRIVE SUITE 155 DEDHAM MA 02026 EFFECT 1 primary_doc.xml