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): May 20, 2015 (May 14, 2015)

GENESIS ENERGY, L.P.

(Exact name of registrant as specified in its charter)

(713) 860-2500

(Registrant’s telephone number, including area code)

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:

Item 1.01. Entry Into a Material Definitive Agreement.

Underwriting Agreement

On May 14, 2015, Genesis Energy, L.P. (the “Partnership”), Genesis Energy Finance Corporation (together with the Partnership, the “Issuers”) and certain subsidiary guarantors entered into an Underwriting Agreement (the “Underwriting Agreement”) with Deutsche Bank Securities Inc., as representative of a group of underwriters named in the Underwriting Agreement, in connection with the Issuers’ public offering of senior notes.

The Underwriting Agreement provides for, among other things, the issuance and sale by the Issuers of $400 million in aggregate principal amount of 6.000% senior unsecured notes due 2023 (the “Notes”), guaranteed by certain subsidiary guarantors of the Partnership (the “Guarantees” and, together with the Notes, the “Securities”). The Securities have been registered under the Securities Act of 1933, as amended (the “Securities Act”), pursuant to the Partnership’s effective Registration Statement on Form S-3 (Registration No. 333-203259), as supplemented by the Prospectus Supplement dated May 14, 2015, relating to the Securities, filed with the SEC pursuant to Rule 424(b) of the Securities Act (the “Prospectus Supplement”).

The Issuers have agreed to indemnify the underwriters against certain liabilities, including liabilities under the Securities Act, or to contribute to payments the underwriters may be required to make because of any of those liabilities.

The Underwriting Agreement contains representations, warranties and other provisions that were made or agreed to, among other things, to provide the parties thereto with specified rights and obligations and to allocate risk among them. Accordingly, the Underwriting Agreement should not be relied upon as constituting a description of the state of affairs of any of the parties thereto or their affiliates at the time it was entered into or otherwise.

A copy of the Underwriting Agreement is filed as Exhibit 1.1 and is incorporated into Item 1.01 of this Current Report on Form 8-K by reference. The description of the Underwriting Agreement contained in this Item 1.01 is qualified in its entirety by the full text of such exhibit.

The underwriters and their respective affiliates have in the past performed commercial banking, investment banking and advisory services for the Partnership from time to time for which they have received customary fees and reimbursement of expenses and may, from time to time, engage in transactions with and perform services for the Partnership in the ordinary course of their business for which they may receive customary fees and reimbursement of expenses. Affiliates of each of the underwriters are lenders under the Partnership’s revolving credit facility, and as such will be entitled to be repaid with the net proceeds of the Securities offering that are used to repay a portion of the borrowings under the revolving credit facility and will receive their pro rata portion of such repayment. In addition, an affiliate of the trustee under the indenture for the Notes is an underwriter in the Securities offering.

Item 7.01 Regulation FD Disclosure.

On May 14, 2015, the Partnership issued press releases announcing the commencement of the offering of the Securities and the pricing of the Securities. The press releases are attached hereto as Exhibit 99.1 and Exhibit 99.2, respectively.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

The following materials are filed as exhibits to this Current Report on Form 8-K.

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.

EXHIBIT INDEX