UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of

the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): February 28, 2020

ATLANTIC POWER CORPORATION

(Exact name of registrant as specified in its charter)

British Columbia, Canada |  | 001-34691 |  | 55-0886410
(State or other jurisdiction of incorporation or organization) |  | (Commission File Number) |  | (IRS Employer Identification No.)

3 Allied Drive, Suite 155 Dedham, MA |  | 02026
(Address of principal executive offices) |  | (Zip Code)

(617) 977-2400

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class | Trading Symbol | Name of Exchange on which registered
Common Shares, no par value, and the associated Rights to Purchase Common Shares | AT | The New York Stock Exchange

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

| ¨ | Written communication pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

| ¨ | Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

| ¨ | Pre-commencement communication pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

| ¨ | Pre-commencement communication pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ¨ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Item 2.02. | Results of Operations and Financial Condition.

On February 28, 2020, Atlantic Power Corporation (the “Company”) held its fourth quarter and year end 2019 financial results conference call and webcast. A copy of management’s prepared remarks and a copy of the related presentation are attached hereto as Exhibits 99.1 and 99.2, respectively, and are hereby incorporated by reference.

The information in Item 2.02, including Exhibits 99.1 and 99.2 is being furnished and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 (the “Exchange Act”) or otherwise subject to the liability of that Section, nor shall such information be deemed to be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933 or the Exchange Act, except as otherwise stated in that filing.

Item 9.01. | Financial Statements and Exhibits

(d) Exhibits

| Exhibit |  |
| Number |  | Description
| 99.1 |  | Atlantic Power Corporation’s management’s prepared remarks with respect to the Atlantic Power Corporation fourth quarter and year end 2019 financial results conference call and webcast.
| 99.2 |  | Presentation prepared with respect to the Atlantic Power Corporation fourth quarter and year end 2019 financial results conference call and webcast.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

| Atlantic Power Corporation
Dated: February 28, 2020 | By: | /s/ TERRENCE RONAN
|  | Name: Title: | Terrence Ronan Chief Financial Officer