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): March 16, 2021

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 8.01.

Other Events.

On March 16, 2021, Atlantic Power Corporation (the “Company”) issued a press release (the “Press Release”) announcing that its indirect, wholly-owned subsidiary, Atlantic Power Limited Partnership (“APLP”), had announced the successful completion of its previously announced consent solicitation process with respect to certain proposed amendments to the trust indenture governing its 5.95% Medium Term Notes due June 23, 2036, in connection with the previously announced proposed transaction with I Squared Capital (the “Transaction”). The Company also announced in the Press Release that the meeting of holders of its 6.00% Series E convertible unsecured subordinated debentures due January 31, 2025 initially scheduled to be held on March 18, 2021 at 10:00 a.m. (Toronto time) is being adjourned to Wednesday, April 7, 2021 at 12:00 p.m. (Toronto time) to allow additional time to solicit proxies. The Press Release is filed as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

Item 9.01.

Financial Statements and Exhibits

(d) Exhibits

	Exhibit Number	Description
	99.1	Press Release of Atlantic Power Corporation, dated March 16, 2021.

	104	Cover Page Interactive Data File (embedded within the Inline XBRL document).

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: March 17, 2021	By:	/s/ Terrence Ronan
		Name:	Terrence Ronan
		Title:	Chief Financial Officer