UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

SCHEDULE 13D

Amendment No. 6

Information To Be Included in Statements Filed Pursuant to § 240.13d-1(a) and

Amendments Thereto Filed Pursuant to § 240.13d-2(a)

Hostess Brands, Inc.

(Name of Issuer)

Class A Common Stock

(Title of Class of Securities)

44109J106

(CUSIP Number)

Gores Sponsor LLC

9800 Wilshire Blvd.

Los Angeles, CA 90212

310-209-3010

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

March 5, 2018

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because off §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.  ☐

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See §240.13d-7 for other parties to whom copies are to be sent.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

Explanatory Note

This Amendment No. 6 (“Amendment No. 6”) amends the Schedule 13D originally filed on November 14, 2016, as amended (the “Schedule 13D”), and is filed jointly by Gores Sponsor LLC (“Gores Sponsor”), AEG Holdings, LLC (“AEG”), Platinum Equity, LLC (“Platinum Equity”), Alec Gores (“Alec Gores”), and Tom Gores (“Tom Gores”), each of whom may be referred to herein as a “Reporting Person” and collectively as the “Reporting Persons,” with respect to the Class A Common Stock, $0.0001 par value per share (“Class A Common Stock”), of Hostess Brands, Inc. (the “Issuer”). Capitalized terms used herein but not defined shall have the meaning attributed to them in the Schedule 13D.

This Amendment No. 6 is being filed to reflect certain distributions of shares of Class A Common Stock and Private Placement Warrants by Gores Sponsor to certain of its members, including AEG and Platinum Equity, transfers of shares of Class A Common Stock and Private Placement Warrants among entities controlled by one or more Reporting Persons and open market sales of shares of Class A Common Stock and Private Placement Warrants beneficially owned by one or more Reporting Persons between March 5, 2018 and July 16, 2018. Distributions of shares of Class A Common Stock and Private Placement Warrants by Gores Sponsor to certain of its members resulted in a reduction in the number of such shares of Class A Common Stock and Private Placement Warrants beneficially owned by the members of Gores Sponsor other than the distributees thereof and their controlling persons. Certain of the other transactions resulted in changes in the form of beneficial ownership by certain of the Reporting Persons without changing the number of shares of Class A Common Stock and Private Placement Warrants beneficially owned thereby.

Item 3 is hereby supplemented as follows:

On March 2, 2018, AEG transferred 2,574,405 shares of Class A Common Stock and 5,098,630 Private Placement Warrants to PCC, at a value of $14.04 per share of Class A Common Stock (an aggregate of $36,144,646.20) and $2.09 per Private Placement Warrant (an aggregate of $10,656,136.70) in repayment of a loan.

On March 19, 2018, AEG transferred 997,350 shares of Class A Common Stock to PCC, at a value of $14.27 per share of Class A Common Stock (an aggregate of $14,232,184.50) in repayment of a loan.

Item 4 is hereby supplemented as follows:

On March 2, 2018, AEG transferred 2,574,405 shares of Class A Common Stock and 5,098,630 Private Placement Warrants to PCC, as described in Item 3 of this Amendment No. 6 above, which description is incorporated by reference herein.

On March 5, 2018, Gores Sponsor made certain distributions of securities of the Issuer to its members, as described in Item 5(c) of this Amendment No. 6, which description is incorporated by reference herein.

Between March 6 and March 15, 2018, PCC sold 1,538,560 shares of Class A Common Stock and between May 30 and July 16, 2018, PCC sold 2,203,808 Private Placement Warrants, in each case as described in Item 5(c) of this Amendment No. 6, which description is incorporated by reference herein.

On March 7, 2018, the spouse of Alec Gores sold all 21,786 shares of Class A Common Stock directly owned thereby, as described in Item 5(c) of this Amendment No. 6, which description is incorporated by reference herein, and of which beneficial ownership was previously attributed to Alec Gores.

On March 19, 2018, AEG transferred 997,530 shares of Class A Common Stock to PCC, as described in Item 3 of this Amendment No. 6 above, which description is incorporated by reference herein.

Item 5 is hereby amended and supplemented as follows:

(a)-(b) The responses of the Reporting Persons to Rows (7) to (13) of the cover pages of this Amendment No. 6 as of July 24, 2018, are incorporated herein by reference. For the purpose of calculating the percentage in Row (13) of the cover page of each Reporting Person, the number of shares of Class A Common Stock outstanding is based on (i) 99,915,614 shares of Class A Common Stock outstanding as of May 8, 2018, as reported in the Quarterly Report on

Form 10-Q for the quarter ended March 31, 2018 filed by the Issuer on May 9, 2018, plus (ii) the number of shares of Class A Common Stock issuable upon exercise of Private Placement Warrants owned by such Reporting Person, if any. AEG and Platinum Equity are the managing members of Gores Sponsor. Alec Gores is the managing member of AEG, and Tom Gores is the managing member of Platinum Equity. As a consequence of these relationships, (x) each of AEG, Platinum Equity, Alec Gores and Tom Gores may be deemed to share beneficial ownership of the securities held by Gores Sponsor, (y) Alec Gores may be deemed to share beneficial ownership of the securities held by AEG and (z) Tom Gores may be deemed to share beneficial ownership of the securities held by Platinum Equity. As described in the footnotes to the cover pages of this Amendment No. 6, the securities of the Issuer beneficially owned by AEG and Alec Gores include shares of Class A Common Stock owned by The Gores Group, LLC, a wholly-owned subsidiary of AEG.

(c) On March 2, 2018, AEG transferred 2,574,405 shares of Class A Common Stock and 5,098,630 Private Placement Warrants to PCC, as described in Item 3 of this Amendment No. 6 above, which description is incorporated by reference herein.

On March 5, 2018, Gores Sponsor distributed 2,308,672 shares of Class A Common Stock to its members, including 997,350 shares of Class A Common Stock distributed to AEG, 27,233 shares of Class A Common Stock distributed to The Gores Group, LLC, a wholly-owned subsidiary of AEG, and 1,284,089 shares of Class A Common Stock distributed to Platinum Equity.

Between March 6 and March 15, 2018, PCC sold 1,538,560 shares of Class A Common Stock and between May 30 and July 16, 2018, PCC sold 2,203,808 Private Placement Warrants, in each case in open market transactions on NASDAQ. The number of securities of the Issuer and the sale price thereof is set forth below:

Class A Common Stock

Private Placement Warrants

On March 7, 2018, Mrs. Gores sold all 21,786 shares of Class A Common Stock directly owned thereby, of which beneficial ownership was previously attributed to Alec Gores, in open market transactions on NASDAQ as follows:

On March 19, 2018, AEG transferred 997,530 shares of Class A Common Stock to PCC, as described in Item 3 of this Amendment No. 6 above, which description is incorporated by reference herein.

(d) Not applicable

(e) On December 13, 2017, following the distribution of securities of the Issuer described in Item 5(c) of Amendment No. 5 to the Schedule 13D filed by the Reporting Persons on January 8, 2018, Gores Sponsor ceased to be the beneficial owner of more than 5% of the outstanding shares of Class A Common Stock.

On March 2, 2018, following the transfer of securities of the Issuer described in Item 5(c) above, AEG ceased to be the beneficial owner of more than 5% of the outstanding shares of Class A Common Stock.

On June 29, 2018, following the sale by PCC of an aggregate of 1,100,000 Private Placement Warrants, Alec Gores ceased to be the beneficial owner of more than 5% of the outstanding shares of Class A Common Stock.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Dated: July 24, 2018