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): September 22, 2014

General Motors Financial Company, Inc.

(Exact name of registrant as specified in its charter)

801 Cherry Street, Suite 3500, Fort Worth, Texas 76102

(Address of principal executive offices, including Zip Code)

(817) 302-7000

(Registrant’s telephone number, including area code)

(Not Applicable)

(Former name or former address, if changed since 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:

Underwriting Agreement.

On September 25, 2014, General Motors Financial Company, Inc. (the “Company”) completed the public offering of $750,000,000 aggregate principal amount of the Company’s 3.000% Senior Notes due 2017 (the “2017 Notes”) and $1,250,000,000 aggregate principal amount of the Company’s 4.375% Senior Notes due 2021 (the “2021 Notes” and, together with the 2017 Notes, the “Notes”) pursuant to an Underwriting Agreement, dated September 22, 2014 (the “Underwriting Agreement”), among the Company, AmeriCredit Financial Services, Inc., Deutsche Bank Securities Inc., Banco Bradesco BBI S.A., Goldman, Sachs & Co., Lloyds Securities Inc. and Morgan Stanley & Co. LLC, as representatives of the several underwriters named therein (the “Underwriters”). The Notes are guaranteed by the Company’s principal United States operating subsidiary, AmeriCredit Financial Services, Inc. (the “Guarantor”).

The Company estimates that the net proceeds of the offering of the Notes will be approximately $1.98 billion, after deducting the Underwriters’ discounts and commissions and the estimated expenses of the offering. The net proceeds from the offering will be added to the Company’s general funds and will be available for general corporate purposes.

The Underwriting Agreement contains customary representations, warranties and agreements by the Company and the Guarantor, customary conditions to closing, other obligations of the parties and termination provisions. Additionally, the Company and the Guarantor have agreed to indemnify the Underwriters against certain liabilities, including liabilities under the Securities Act of 1933 (the “Securities Act”), or to contribute to payments the underwriters may be required to make because of any of those liabilities.

The foregoing description is a brief summary of the Underwriting Agreement and does not purport to be a complete statement of the parties’ rights and obligations thereunder. The foregoing description is qualified in its entirety by reference to the full text of the Underwriting Agreement, a copy of which is attached as Exhibit 1.1 to this Current Report on Form 8-K and incorporated by reference herein.

The offering of the Notes was made pursuant to a shelf registration statement on Form S-3 (File No. 333-196531), which was declared effective by the Securities and Exchange Commission (the “SEC”) on June 16, 2014. A prospectus supplement dated September 22, 2014 relating to the Notes and supplementing the Prospectus dated June 16, 2014 was filed with the SEC pursuant to Rule 424(b)(2) under the Securities Act. The legal opinion of Hunton & Williams LLP related to the offering of the Notes pursuant to the Registration Statement is filed as Exhibit 5.1 to this Current Report on Form 8-K.

Supplemental Indentures

The Company issued the Notes pursuant to the Indenture, dated July 10, 2014 (the “Base Indenture”), as supplemented with respect to the 2017 Notes by the Third Supplemental Indenture, dated September 25, 2014 (the “Third Supplemental Indenture”), and as further supplemented with respect to the 2021 Notes by the Fourth Supplemental Indenture, dated September 25, 2014 (the “Fourth Supplemental Indenture” and, together with the Base Indenture and the Third Supplemental Indenture, the “Indenture”), in each case by and among the Company, the Guarantor and Wells Fargo Bank, National Association, as trustee.

The 2017 Notes will bear interest at a rate of 3.000% per year on the principal amount of the 2017 Notes, payable semi-annually in arrears on March 25 and September 25 of each year, beginning on March 25, 2015. The 2017 Notes will mature on September 25, 2017.

The 2021 Notes will bear interest at a rate of 4.375% per year on the principal amount of the 2021 Notes, payable semi-annually in arrears on March 25 and September 25 of each year, beginning on March 25, 2015. The 2021 Notes will mature on September 25, 2021.

The Indenture contains covenants that limit the Company’s ability to sell all or substantially all of its assets or merge or consolidate with or into other companies and that provide that the Company and certain of its subsidiaries may not grant liens to other creditors, unless the Notes are secured by liens on an equal and ratable basis to those granted to such other creditors. In addition, if a change of control (as that term is defined in the Indenture) occurs prior to the Company being rated “investment grade” by at least two of three listed rating agencies, the holders of Notes will have the right, subject to certain conditions, to require the Company to repurchase their Notes at a purchase price equal to 101% of the aggregate principal amount of Notes repurchased plus accrued and unpaid interest, as of the date of repurchase.

The Company, at its option, may redeem the Notes at any time in whole or from time to time in part, at a redemption price equal to the greater of (i) 100% of the principal amount of the Notes being redeemed and (ii) the sum of the present values of the remaining scheduled payments of principal and interest on the Notes to be redeemed (exclusive of interest accrued as of the date of redemption) discounted to the date of redemption on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at a rate equal to the sum of the applicable Treasury Rate plus (x) 30 basis points in the case of the 2017 Notes and (y) 35 basis points in the case of the 2021 Notes. The Company will also pay the accrued and unpaid interest on the principal amount being redeemed to the date of redemption.

The Indenture provides for customary events of default, including nonpayment, failure to comply with covenants or other agreements in the Indenture, any subsidiary guarantee shall cease to be in full force and effect or any guarantor shall deny or disaffirm its obligations under its subsidiary guarantee, and certain events of bankruptcy or insolvency. If any event of default occurs and is continuing with respect to a series of Notes, the trustee or the holders of at least 25% in principal amount of the then outstanding Notes of such series may declare all of the Notes of such series to be due and payable immediately.

Copies of the Base Indenture, the Third Supplemental Indenture and the Fourth Supplemental Indenture are incorporated by reference or attached as Exhibit 4.1, Exhibit 4.2 and Exhibit 4.3, respectively, to this Current Report on Form 8-K and are incorporated herein by reference. The foregoing description is a brief summary of the Indenture and does not purport to be a complete statement of the parties’ rights and obligations thereunder. The foregoing description is qualified in its entirety by the terms of the Indenture.

(d) Exhibits

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.

Index to Exhibits