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) ~~November~~May 1020, ~~2016~~2018



Commission File Number	Registrant, State of Incorporation, Address and Telephone Number	I.R.S. Employer Identification No.

001-37803	Southern Power Company (A Delaware Corporation) 30 Ivan Allen Jr. Blvd., N.W. Atlanta, Georgia 30308 (404) 506-5000	58-2598670

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))

~~Item~~Indicate 8by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.01405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240. ~~Other~~12b-2 ~~Events~~of this chapter).

OnEmerging ~~November~~growth ~~10,~~company 2016, Southern Power Company (the “Company”) entered into Underwriting Agreements covering the issue and sale of $600,000,000 aggregate principal amount of its Series 2016D 1.950% Senior Notes due December 15, 2019 (the “Series 2016D Senior Notes”), $300,000,000 aggregate principal amount of its Series 2016E 2.500% Senior Notes due December 15, 2021 (the “Series 2016E Senior Notes”) and $400,000,000 aggregate principal amount of its Series 2016F 4.950% Senior Notes due December 15, 2046 (the “Series 2016F Senior Notes”). Each of the Series 2016D Senior Notes, the Series 2016E Senior Notes and the Series 2016F Senior Notes were registered under the Securities Act of 1933, as amended, pursuant to the shelf registration statement (Registration No. 333-213264) of the Company.¨

~~Item~~If ~~9.01. Financial~~an ~~Statements~~emerging ~~and~~growth ~~Exhibits~~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. ¨

(d) Exhibits
1.2(a)	Underwriting Agreement relating to the Series 2016D Senior Notes, dated November 10, 2016, among the Company and Barclays Capital Inc., BNP Paribas Securities Corp., Merrill Lynch, Pierce, Fenner & Smith Incorporated, Mizuho Securities USA Inc., Scotia Capital (USA) Inc. and U.S. Bancorp Investments, Inc., as representatives of the Underwriters named in Schedule I thereto.
1.2(b)	Underwriting Agreement relating to the Series 2016E Senior Notes, dated November 10, 2016, among the Company and Barclays Capital Inc., BNP Paribas Securities Corp., Merrill Lynch, Pierce, Fenner & Smith Incorporated, Mizuho Securities USA Inc., Scotia Capital (USA) Inc. and U.S. Bancorp Investments, Inc., as representatives of the Underwriters named in Schedule I thereto.
1.2(c)	Underwriting Agreement relating to the Series 2016F Senior Notes, dated November 10, 2016, among the Company and Barclays Capital Inc., BNP Paribas Securities Corp., Merrill Lynch, Pierce, Fenner & Smith Incorporated, Mizuho Securities USA Inc., Scotia Capital (USA) Inc. and U.S. Bancorp Investments, Inc., as representatives of the Underwriters named in Schedule I thereto.
4.4(a)	Fourteenth Supplemental Indenture to Senior Note Indenture dated as of November 16, 2016, providing for the issuance of the Series 2016D Senior Notes.
4.4(b)	Fifteenth Supplemental Indenture to Senior Note Indenture dated as of November 16, 2016, providing for the issuance of the Series 2016E Senior Notes.
4.4(c)	Sixteenth Supplemental Indenture to Senior Note Indenture dated as of November 16, 2016, providing for the issuance of the Series 2016F Senior Notes.

Item 1.01. Entry into a Material Definitive Agreement.

4.5(a)	Form of the Series 2016D Senior Note (included in Exhibit 4.4(a) above).
4.5(b)	Form of the Series 2016E Senior Note (included in Exhibit 4.4(b) above).
4.5(c)	Form of the Series 2016F Senior Note (included in Exhibit 4.4(c) above).
5.1(a)	Opinion of Troutman Sanders LLP relating to the Series 2016D Senior Notes.
5.1(b)	Opinion of Troutman Sanders LLP relating to the Series 2016E Senior Notes.
5.1(c)	Opinion of Troutman Sanders LLP relating to the Series 2016F Senior Notes.
8.1(a)	Tax Opinion of Troutman Sanders LLP relating to the Series 2016D Senior Notes.
8.1(b)	Tax Opinion of Troutman Sanders LLP relating to the Series 2016E Senior Notes.
8.1(c)	Tax Opinion of Troutman Sanders LLP relating to the Series 2016F Senior Notes.
12.1	Computation of ratio of earnings to fixed charges.
23.1(a)	Consent of Troutman Sanders LLP relating to the Series 2016D Senior Notes (included in Exhibit 5.1(a) above).
23.1(b)	Consent of Troutman Sanders LLP relating to the Series 2016E Senior Notes (included in Exhibit 5.1(b) above).
23.1(c)	Consent of Troutman Sanders LLP relating to the Series 2016F Senior Notes (included in Exhibit 5.1(c) above).
23.2(a)	Consent of Troutman Sanders LLP relating to the Series 2016D Senior Notes (included in Exhibit 8.1(a) above).
23.2(b)	Consent of Troutman Sanders LLP relating to the Series 2016E Senior Notes (included in Exhibit 8.1(b) above).
23.2(c)	Consent of Troutman Sanders LLP relating to the Series 2016F Senior Notes (included in Exhibit 8.1(c) above).

On May 20, 2018, Southern Power Company (“Southern Power”) entered into an Equity Interest Purchase Agreement with NextEra Energy, Inc. (“Parent”) and its wholly-owned subsidiary 700 Universe, LLC (“Purchaser”) to sell all of the equity interests in (i) Southern Company - Oleander LLC (“SCO”), the indirect owner of the Oleander Power Project in Cocoa, Florida, and (ii) Southern Company - Florida LLC (“SCF”), the owner of an undivided 65% interest in the Stanton Energy Center Combined Cycle Unit A located near Orlando, Florida to Purchaser, for an aggregate cash purchase price of $195 million, subject to customary adjustments for indebtedness and working capital (the “Southern Power Florida Plants EIPA”). The purchase price described above will be (i) increased by $110,000 per day for each day between the closing and December 31, 2018, if the closing occurs prior to such date, or (ii) decreased by $110,000 per day for each day between the closing and December 31, 2018, if the closing occurs subsequent to such date. In addition, under certain specified circumstances, Southern Power may be required to make a payment to Purchaser based on a post-closing revenue analysis of SCO’s and SCF’s power purchase agreements.

The Southern Power Florida Plants EIPA contains customary representations, warranties and covenants of Southern Power, Purchaser and Parent. These covenants include, among others, an obligation of Southern Power to operate SCO’s and SCF’s businesses in the ordinary course until the sale is consummated and an obligation for each of the parties to use reasonable best efforts to obtain governmental and regulatory approvals.

The sale of SCO and SCF is subject to the satisfaction or waiver of certain closing conditions, including, among others, (i) the expiration or termination of the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act, (ii) approval by the Federal Energy Regulatory Commission and the Federal Communications Commission and (iii) other customary closing conditions.

The Southern Power Florida Plants EIPA may be terminated by either Southern Power or Purchaser under certain circumstances, including if the sale of SCO and SCF is not consummated by June

28, 2019 (subject to extension to December 31, 2019, if all of the conditions to closing, other than the conditions related to obtaining regulatory approvals, have been satisfied). The Southern Power Florida Plants EIPA further provides that, upon the termination thereof under certain specified circumstances, Purchaser will be required to pay Southern Power a termination fee of $6 million.

The sale of SCO and SCF is expected to be completed in the first half of 2019.

Item 2.06. Material Impairments.

In connection with the proposed sale of Southern Power’s generating plants in Florida (as described in Item 1.01 above), on May 20, 2018, Southern Power determined that a pretax impairment charge related to the plant assets of approximately $120 million ($90 million after tax) will be recorded in the second quarter 2018. There are no estimated future cash expenditures associated with this impairment charge.

Cautionary Note Regarding Forward-Looking Statements

This Current Report on Form 8-K contains forward-looking statements which are made pursuant to safe harbor provisions of the Private Securities Litigation Reform Act of 1995. These forward-looking statements include statements, among other things, concerning the expected timing of the completion of the disposition described herein. These forward-looking statements are often characterized by the use of words such as “expect,” “anticipate,” “plan,” “believe,” “may,” “should,” “will,” “could,” “continue” and the negative or plural of these words and other comparable terminology. Although Southern Power believes that the expectations reflected in such forward-looking statements are reasonable, such statements involve risks and uncertainties and undue reliance should not be placed on such statements. Certain material factors or assumptions are applied in making forward-looking statements, including, but not limited to, factors and assumptions regarding the items outlined above. Actual results may differ materially from those expressed or implied in such statements. Important factors that could cause actual results to differ materially from these expectations include, among other things, the following: the failure to receive, on a timely basis or otherwise, the required approvals by government or regulatory agencies (including the terms of such approvals); the inability to achieve the expected financial benefits of the proceeds generated by the transaction; the risk that a condition to closing of the disposition may not be satisfied; and other risk factors relating to the energy industry, as detailed from time to time in Southern Power’s reports filed with the Securities and Exchange Commission. There can be no assurance that the disposition will in fact be consummated.

Additional information about these factors and about the material factors or assumptions underlying such forward-looking statements may be found in the body of this Current Report on Form 8-K, as well as under Item 1A. in Southern Power’s Annual Report on Form 10-K for the fiscal year ended December 31, 2017. Southern Power cautions that the foregoing list of important factors that may affect future results is not exhaustive. When relying on forward-looking statements to make decisions with respect to Southern Power, investors and others should carefully consider the foregoing factors and other uncertainties and potential events. All subsequent written and oral forward-looking statements concerning

the disposition or other matters attributable to Southern Power or any other person acting on its behalf are expressly qualified in their entirety by the cautionary statements referenced above. The forward-looking statements contained herein speak only as of the date of this Current Report on Form 8-K. Southern Power undertakes no obligation to update or revise any forward-looking statement, except as may be required by law.

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: November 16, 2016	SOUTHERN POWER COMPANY
Date: May 21, 2018	SOUTHERN POWER COMPANY
	By	/s/~~Elliott~~Melissa LK. ~~Spencer~~Caen
		Elliott L. SpencerComptroller andCorporate Secretary
		Melissa K. CaenAssistant Secretary

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