X0306 4 2018-03-19 0 0001419242 ATLANTIC POWER CORP AT 0001136877 MOORE JAMES J JR C/O ATLANTIC POWER CORPORATION 3 ALLIED DRIVE, SUITE 220 DEDHAM MA 02026 1 1 0 0 Chief Executive Officer Notional shares 2018-03-19 4 A 0 150000 A Common shares 150000 781818 D Represents a grant of notional shares pursuant to the Company's Long-Term Incentive Plan (LTIP) in consideration of services previously provided and Mr. Moore's continued employment, which will vest, in full, on the three year anniversary of the grant date. Under the LTIP, each notional share represents a right to receive one-third in cash, which will be deposited into the reporting persons applicable payroll tax withholding account, and the remainder in common shares. /s/ John S. Miele, attorney-in-fact 2018-03-21