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): December 1, 2015

Vantage Drilling Company

(Exact name of registrant as specified in its charter)

777 Post Oak Boulevard, Suite 800

Houston, TX 77056

(Address of principal executive offices) (Zip Code)

(281) 404-4700

(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 (see General Instruction A.2 below):

On December 1, 2015, Vantage Drilling Company (the “Company”), Offshore Group Investment Limited, a wholly-owned subsidiary of the Company (“OGIL”), and certain subsidiaries of OGIL entered into a Restructuring Support Agreement (the “Restructuring Agreement”) with (i) certain beneficial holders of loans under OGIL’s Amended and Restated Term Loan Agreement, (ii) certain beneficial holders of loans under OGIL’s Second Term Loan Agreement, (iii) certain beneficial holders, or investment advisers or managers for the account of beneficial holders, of the 7.5% Senior Secured First Lien Notes due 2019 issued by OGIL, (iv) certain beneficial holders, or investment advisers or managers for the account of beneficial holders, of the 7.125% Senior Secured First Lien Notes due 2023 issued by OGIL, (v) Royal Bank of Canada, as administrative agent under the Company’s and OGIL’s Amended and Restated Credit Agreement (the “Revolving Credit Facility”), and (vi) certain holders of indebtedness under the Revolving Credit Facility. The holders of loans and other indebtedness of the Company mentioned in clauses (i) through (iv) and (vi) of the prior sentence are referred to herein as the “Restructuring Lenders”.

The Restructuring Agreement contemplates the financial restructuring of the existing indebtedness of OGIL and certain subsidiaries of OGIL (the “Restructuring”) on terms consistent with a Restructuring Term Sheet attached to the Restructuring Agreement (the “Restructuring Term Sheet”). The Restructuring Term Sheet states that the Restructuring shall be implemented by

Pursuant to the Restructuring Agreement, OGIL has commenced a solicitation of votes for the Plan on December 2, 2015. In connection with the commencement of the solicitation, a Disclosure Statement was distributed to certain creditors of the Company, which is included as Exhibit 10.3 to this Form 8-K and incorporated by reference herein (the “Disclosure Statement”). It is expected that OGIL and such subsidiaries will commence the Chapter 11 cases on December 3, 2015.

In the Restructuring Agreement, the Company, OGIL and the subsidiaries of OGIL agree, among other things,

In the Restructuring Agreement, the Restructuring Lenders agree, among other things,

The Restructuring Term Sheet anticipates that as part of the Plan, among other things,

The Restructuring Term Sheet anticipates that on the effective date of the Plan, among other things,

The foregoing description of the Restructuring Agreement and the Restructuring Term Sheet do not purport to be complete and is qualified in its entirety by reference to the Restructuring Agreement (to which the Restructuring Term Sheet is attached), a copy of which is filed as Exhibit 10.1 to this Form 8-K.

The information set forth above in item 1.01 of this Form 8-K regarding the Restructuring Agreement and the Disclosure Statement is incorporated herein by reference.

On December 2, 2015, in connection with the Restructuring Agreement and the Plan, the Company issued a press release, a copy of which is filed herewith as Exhibit 99.1.

In accordance with General Instruction B.2 to Form 8-K, the information provided under this Item 7.01 shall be deemed to be “furnished” and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended (the “Securities Act”). The Company does not undertake to update the information as posted on its website; however, it may post additional information included in future press releases and Forms 8-K, as well as posting its periodic Exchange Act reports.

Forward-Looking Statements

This Current Report on Form 8-K contains forward-looking statements within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act. These forward-looking statements relate to the Company’s plans, goals, strategies, intent, beliefs and current expectations. These statements are expressed in good faith and based upon a reasonable basis when made, but there can be no assurance that these expectations will be achieved or accomplished. These forward-looking statements reflect the Company’s current views with respect to future events and are based on assumptions and subject to risks and uncertainties. Items contemplating or making assumptions

about the Company’s industry, business strategy, goals, expectations concerning the Company’s market position, future operations, margins, profitability, capital expenditures, liquidity and capital resources and other financial and operating information also constitute such forward-looking statements. You should not place undue reliance on these forward-looking statements.

These forward-looking statements can be identified by the use of terms and phrases such as “believe,” “plan,” “intend,” “anticipate,” “target,” “estimate,” “expect” and the like, and/or future tense or conditional constructions (“will,” “may,” “could,” “should,” etc.). The Company’s actual results could differ materially from those anticipated in these forward-looking statements.

Factors that could cause the Company’s results to differ materially include: (i) the Company’s ability to obtain Bankruptcy Court approval with respect to motions in the Chapter 11 Cases; (ii) the Company’s ability to operate its business during this process, (iii) the effects of the Company’s bankruptcy filing on the Company’s business and the interests of various creditors, equity holders and other constituents, (iv) the length of time the Company will operate under the Chapter 11 Cases, (v) risks associated with third party motions in the Chapter 11 Cases, which may interfere with the Company’s ability to develop and consummate the plan of reorganization, (vi) the potential adverse effects of the Chapter 11 proceedings on the Company’s liquidity or results of operations, and (vii) other factors disclosed by the Company from time to time in its filings with the SEC, including those described under the caption “Risk Factors” in the Company’s Annual Report on Form 10-K and Quarterly Reports on Form 10-Q.

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: December 2, 2015

INDEX TO EXHIBITS