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): August 14, 2013

QEP Midstream Partners, LP

(Exact name of registrant as specified in its charter)

1050 17^th Street, Suite 500

Denver, Colorado 80265

(Address of principal executive office) (Zip Code)

(303) 672-6900

(Registrants’ 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.

On August 14, 2013, QEP Midstream Partners, LP (the “Partnership”) completed its initial public offering (the “Offering”) of 20,000,000 common units representing limited partner interests in the Partnership (“Common Units”), at $21.00 per Common Unit pursuant to a Registration Statement on Form S-1, as amended (File No. 333-188487), initially filed by the Partnership with the Securities and Exchange Commission (the “Commission”) pursuant to the Securities Act of 1933, as amended (the “Securities Act”), on May 9, 2013. The material provisions of the Offering are described in the prospectus, dated August 8, 2013, filed with the Commission on August 9, 2013, pursuant to Rule 424(b) under the Securities Act (the “Prospectus”).

Contribution, Conveyance and Assumption Agreement

The description of the Contribution Agreement (as defined below) provided below under Item 2.01 is incorporated in this Item 1.01 by reference. A copy of the Contribution Agreement is filed as Exhibit 10.1 to this Current Report on Form 8-K and incorporated herein by reference.

Omnibus Agreement

On August 14, 2013, in connection with the closing of the Offering, the Partnership entered into an Omnibus Agreement (the “Omnibus Agreement”) with its general partner, QEP Midstream Partners GP, LLC, a Delaware limited liability company (the “General Partner”), QEP Resources, Inc., a Delaware corporation (“QEP”), QEP Field Services Company, a Delaware corporation (“Field Services”), and QEP Midstream Partners Operating, LLC, a Delaware limited liability company and wholly owned subsidiary of the Partnership (the “Operating Company”), that addresses the following matters:

So long as QEP controls the Partnership’s general partner, the Omnibus Agreement will remain in full force and effect. If QEP ceases to control the Partnership’s general partner, either party may terminate the Omnibus Agreement, provided that the indemnification obligations will remain in full force and effect in accordance with their terms.

The foregoing description is not complete and is qualified in its entirety by reference to the Omnibus Agreement, which is filed as Exhibit 10.2 to this Current Report on Form 8-K and incorporated herein by reference.

Credit Facility

On August 14, 2013, in connection with the closing of the Offering, the Partnership entered into a $500 million senior secured revolving credit facility with Wells Fargo Bank, National Association, as administrative agent, and a syndicate of lenders (the “Credit Facility”), which will mature on August 14, 2018. The Credit Facility will be available for working capital, capital expenditures, permitted acquisitions and general corporate purposes, including distributions, not in contravention of law or the loan documents. In addition, the Credit Facility includes a sublimit up to $50 million for letters of credit and a sublimit of up to $25 million for swing line loans. Substantially all of the Partnership’s assets, but excluding equity in and assets of certain joint ventures and unrestricted subsidiaries and other customary exclusions, are pledged as collateral under the Credit Facility.

The Credit Facility contains various covenants and restrictive provisions that limit the Partnership’s ability (as well as the ability of its subsidiaries) to, among other things:

The Credit Facility also requires compliance with certain financial covenants as follows:

In addition, the Credit Facility contains events of default customary for transactions of this nature, including, but not limited to (i) events of default resulting from the Partnership’s failure or the failure of its subsidiaries to comply with covenants and financial ratios, (ii) the occurrence of a change of control (as defined in the credit agreement), (iii) the institution of insolvency or similar proceedings against the Partnership, its material subsidiaries or its general partner, (iv) the occurrence of a default under any other indebtedness over a certain threshold of the Partnership or its subsidiaries and (v) any one or more collateral documents ceasing to create a valid and perfected lien on collateral (as defined in the credit agreement) having in aggregate a fair market value equal to or greater than 5% of consolidated net tangible assets (as defined in the credit agreement). Upon the occurrence and during the continuation of an event of default, subject to the terms and conditions of the credit agreement, the lenders may declare any outstanding principal of the Credit Facility debt, together with accrued and unpaid interest, to be immediately due and payable and may exercise the other remedies set forth or referred to in the credit agreement and the other loan documents.

Loans under the Credit Facility will bear interest at the Partnership’s option at a variable rate per annum equal to either:

The foregoing description is not complete and is qualified in its entirety by reference to the full text of the Credit Facility, which is filed as Exhibit 10.3 to this Current Report on Form 8-K and incorporated herein by reference.

Item 2.01 Completion of Acquisition or Disposition of Assets.

On August 14, 2013, in connection with the closing of the Offering, the Partnership entered into a Contribution, Conveyance and Assumption Agreement (the “Contribution Agreement”) with Field Services, the General Partner and the Operating Company. Immediately prior to the closing of the Offering, the following transactions, among others, occurred pursuant to the Contribution Agreement:

These transfers and distributions were made in a series of steps outlined in the Contribution Agreement. The foregoing description is not complete and is qualified in its entirety by reference to the full text of the Contribution Agreement, which is attached as Exhibit 10.1 to this Current Report on Form 8-K and incorporated herein by reference.

Item 3.02 Unregistered Sales of Equity Securities.

The description in Item 2.01 above of the issuance of equity interests by the Partnership on August 14, 2013 to the General Partner and Field Services, in connection with the consummation of the transactions contemplated by the Contribution Agreement, is incorporated in this Item 3.02 by reference. The foregoing transactions were undertaken in reliance upon the exemption from the registration requirements of the Securities Act afforded by Section 4(2) thereof. The Partnership believes that exemptions other than the foregoing exemption may exist for these transactions.

Each of the Subordinated Units granted under the Contribution Agreement will convert into one Common Unit at the end of the subordination period and then will participate pro rata with the other Common Units in distributions of available cash. Unless earlier terminated pursuant to the terms of the Partnership’s Partnership Agreement (as defined below), the subordination period will extend until the first business day of any quarter beginning after September 30, 2016, that the Partnership meets the financial tests set forth in the Partnership Agreement, but may end sooner if the Partnership meets additional financial tests. The description of the subordination period contained in the section entitled “Provisions of Our Partnership Agreement Relating to Cash Distributions—Subordinated Units and Subordination Period” of the Prospectus is incorporated herein by reference.

Item 5.03 Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year.

First Amended and Restated Agreement of Limited Partnership of QEP Midstream Partners, LP

On August 14, 2013, in connection with the closing of the Offering, the Agreement of Limited Partnership was amended and restated by the First Amended and Restated Agreement of

Limited Partnership of QEP Midstream Partners, LP (as amended and restated, the “Partnership Agreement”). A description of the Partnership Agreement is contained in the Prospectus in the section entitled “Our Partnership Agreement” and incorporated herein by reference.

The foregoing description is not complete and is qualified in its entirety by reference to the Partnership Agreement, which is filed as Exhibit 3.1 to this Current Report on Form 8-K and incorporated herein by reference.

Item 9.01 Financial Statements and Exhibits.

(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.

EXHIBIT INDEX