0001179110-21-005596 4 1 20210514 20210519 20210519 Ronan Terrence 0001557506 4 34 001-34691 21941966 ONE FEDERAL STREET 30TH FLOOR BOSTON MA 02110 ATLANTIC POWER CORP 0001419242 4900 550886410 A1 1231 3 ALLIED DRIVE SUITE 155 DEDHAM MA 02026 617-977-2400 3 ALLIED DRIVE SUITE 155 DEDHAM MA 02026 4 1 edgar.xml FORM 4 -