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) ~~June~~January 135, ~~2019~~2021

CommissionFile Number	Registrant, State of Incorporation,Address and Telephone Number	I.R.S. EmployerIdentification No.
001-37803	Southern Power Company(A Delaware Corporation)30 Ivan Allen Jr. Blvd., N.W.Atlanta, Georgia 30308(404) 506-5000	58-2598670

Commission
File Number

Registrant,
State of Incorporation,
Address and Telephone Number

I.R.S. Employer
Identification No.

001-37803

Southern Power Company

58-2598670

(A Delaware Corporation)

30 Ivan Allen Jr. Boulevard, N.W.

Atlanta, Georgia 30308

(404) 506-5000

The name and address of the registrant have not changed since the last report.

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:

[☐ ] Written communications 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 communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) [☐ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Registrant			Title of each class	TradingSymbol(s)	Name of each exchangeon which registered
Series 2016A 1.000% Senior Notes due 2022	SO/22B	New York Stock Exchange
Southern Power Company			Series 2016A 1.000% Senior Notes due 2022	SO/22B	New York Stock Exchange
Series 2016B 1.850% Senior Notes due 2026	SO/26A	New York Stock Exchange
Southern Power Company			Series 2016B 1.850% Senior Notes due 2026	SO/26A	New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

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 28.01. ~~Completion~~ ofOther ~~Acquisition or Disposition of Assets~~Events.

On ~~June~~January 135, ~~2019~~2021, Southern Power Company ~~completed~~(the ~~its~~“Company”) ~~previously-announced~~entered ~~sale~~into ofan ~~all~~Underwriting ofAgreement covering the ~~equity~~issue ~~interests~~and insale ~~Nacogdoches~~of ~~Power~~$400, ~~LLC~~000,000 ~~the~~aggregate ~~owner~~principal amount of anits ~~approximately~~Series ~~115-megawatt~~2021A ~~biomass~~0.90% ~~facility~~Senior ~~located~~Notes indue ~~Nacogdoches~~January ~~County~~15, ~~Texas,~~2026 to(the ~~The~~“Series ~~City~~2021A ofSenior ~~Austin~~Notes”). The ~~d/b/a~~Series ~~Austin~~2021A ~~Energy,~~Senior ~~for~~Notes anwere ~~aggregate~~registered ~~cash~~under ~~purchase~~the ~~price~~Securities Act of ~~approximately~~1933, ~~$460~~as ~~million~~amended, ~~subject~~pursuant to ~~customary~~the ~~working~~shelf ~~capital~~registration ~~adjustments~~statement (Registration No. 333-234433) of the Company.

Item 9.01. Financial Statements and Exhibits.

(b) Pro Forma Financial Information.


(d) Exhibits.
1.1			Underwriting Agreement relating to the Series 2021A Senior Notes, dated January 5, 2021, among the Company and BofA Securities, Inc., J.P. Morgan Securities LLC and Mizuho Securities USA LLC, as representatives of the several Underwriters named in Schedule I thereto.

4.4			Eighteenth Supplemental Indenture to Senior Note Indenture dated as of January 8, 2021, providing for the issuance of the Series 2021A Senior Notes.

4.7			Form of the Series 2021A Senior Note (included in Exhibit 4.4 above).

5.1			Opinion of Troutman Pepper Hamilton Sanders LLP relating to the Series 2021A Senior Notes.

8.1			Tax Opinion of Troutman Pepper Hamilton Sanders LLP relating to the Series 2021A Senior Notes.

23.1			Consent of Troutman Pepper Hamilton Sanders LLP (included in Exhibit 5.1 above).

23.2			Consent of Troutman Pepper Hamilton Sanders LLP (included in Exhibit 8.1 above).

104			Cover Page Interactive Data File – The cover page iXBRL tags are embedded within the inline XBRL document.

Unaudited pro forma condensed consolidated financial information as of March 31, 2019 and for the three months ended March 31, 2019 and the year ended December 31, 2018 is attached hereto as Exhibit 99.1.

(d) Exhibits.

2.1	Membership Interest Purchase Agreement, dated as of April 17, 2019, by and between Southern Power Company and The City of Austin d/b/a Austin Energy.
2.2	Letter Agreement, dated as of May 24, 2019 by and between Southern Power Company and The City of Austin d/b/a Austin Energy.
99.1	Unaudited pro forma condensed consolidated financial information.

SIGNATURE

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.

Date: June 13, 2019	SOUTHERN POWER COMPANY
Date: January 8, 2021			SOUTHERN POWER COMPANY
	By	~~/s/Melissa K. Caen~~	By	/s/Melissa K. Caen
		~~Melissa K. CaenAssistant Secretary~~		Melissa K. CaenAssistant Secretary

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