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 7, 2017

Tallgrass Energy Partners, LP

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (913) 928-6060

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:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR 230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR 240.12b-2).

Emerging growth company  ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

Item 1.01 Entry into a Material Definitive Agreement.

Purchase Agreement

On December 7, 2017, Tallgrass Energy Partners, LP (the “Partnership”), Tallgrass Energy Finance Corp., a wholly owned subsidiary of the Partnership (the “Co-Issuer” and together with the Partnership, the “Issuers”), and the Partnership’s existing direct and indirect wholly owned subsidiaries (other than the Co-Issuer, the “Guarantors”), entered into a purchase agreement (the “Purchase Agreement”) with Citigroup Global Markets Inc., as representative of the several initial purchasers named therein (the “Initial Purchasers”), pursuant to which the Issuers agreed to sell an additional $250,000,000 in aggregate principal amount of the Issuers’ 5.50% Senior Notes due 2028 (the “Additional Notes”), and the Guarantors agreed to provide the guarantees of the Additional Notes. The Additional Notes were offered as additional notes to the Partnership’s existing $500 million aggregate principal amount of 5.50% Senior Notes due 2028 that the Issuers issued in a private placement that closed on September 15, 2017 (the “September 2017 Notes” and, together with the Additional Notes, the “Notes”). The Additional Notes were offered and sold in a transaction exempt from the registration requirements under the Securities Act of 1933, as amended (the “Securities Act”). The Additional Notes were sold to qualified institutional buyers in reliance on Rule 144A under the Securities Act and to persons outside the United States in reliance on Regulation S under the Securities Act.

The Purchase Agreement contains customary representations and warranties of the parties and indemnification and contribution provisions under which the Issuers and the Guarantors, on one hand, and the Initial Purchasers, on the other, have agreed to indemnify each other against certain liabilities, including liabilities under the Securities Act, and customary conditions to closing, obligations of the parties and termination provisions.

The Initial Purchasers and certain of their affiliates are full service financial institutions engaged in various activities, which may include securities trading, commercial and investment banking, financial advisory, investment management, investment research, principal investment, hedging, financing and brokerage activities. The Initial Purchasers and certain of their affiliates have, from time to time, performed, and may in the future perform, various commercial and investment banking and financial advisory services for the Partnership and its affiliates, for which they received or may in the future receive customary fees and expenses. In particular, affiliates of the Initial Purchasers are lenders under the Partnership’s revolving credit facility.

The foregoing description of the Purchase Agreement does not purport to be complete and is qualified in its entirety by reference to the full text of the Purchase Agreement, which is filed with this Current Report on Form 8-K as Exhibit 1.1 and is incorporated herein by reference.

Indenture and Notes

On September 15, 2017, the Issuers, the Guarantors named therein and U.S. Bank National Association, as trustee, entered into an Indenture dated as of September 15, 2017 (as supplemented, the “Indenture”), governing the terms of the Notes. The Notes are general

unsecured senior obligations of the Issuers. The Notes are unconditionally guaranteed jointly and severally on a senior unsecured basis by the Guarantors and will be guaranteed by certain of the Partnership’s future subsidiaries. The Notes rank equal in right of payment with all existing and future senior indebtedness of the Issuers, and senior in right of payment to any future subordinated indebtedness of the Issuers.

Interest and Maturity

The Notes will mature on January 15, 2028 and interest on the Notes is payable in cash semi-annually in arrears on each January 15 and July 15, commencing July 15, 2018. Interest will be payable to holders of record on the January 1 and July 1 immediately preceding the related interest payment date, and will be computed on the basis of a 360-day year consisting of twelve 30-day months.

Optional Redemption

At any time prior to September 15, 2020, the Issuers may on one or more occasions redeem up to 35% of the aggregate principal amount of Notes issued under the Indenture, upon not less than 30 or more than 60 days’ notice, at a redemption price of 105.500% of the principal amount, plus accrued and unpaid interest, if any, to, but excluding, the redemption date (subject to the right of holders of record on the relevant record date to receive interest due on an interest payment date that is on or prior to the redemption date), in an amount not greater than the net cash proceeds of one or more equity offerings by the Partnership, provided that:

Prior to January 15, 2023, the Issuers may redeem all or part of the Notes, upon not less than 30 or more than 60 days’ notice, at a redemption price equal to the sum of:

On and after January 15, 2023, the Issuers may redeem all or a part of the Notes, upon not less than 30 or more than 60 days’ notice, at the redemption prices (expressed as percentages of principal amount) set forth below, plus accrued and unpaid interest, if any, on the Notes redeemed to, but excluding, the applicable redemption date (subject to the right of holders of record on the relevant record date to receive interest due on an interest payment date that is on or prior to the redemption date), if redeemed during the twelve-month period beginning on January 15 of the years indicated below:

Change of Control

If a Change of Control Triggering Event (as defined in the Indenture) occurs, each holder of Notes may require the Partnership to repurchase all or a portion of that holder’s Notes for cash at a price equal to 101% of the aggregate principal amount of the Notes repurchased, plus any accrued but unpaid interest on the notes repurchased, to, but excluding, the date of settlement (subject to the right of holders of record on the relevant record date to receive interest due on an interest payment date that is on or prior to the settlement date).

Certain Covenants

The Indenture contains covenants that, among other things, limit the Partnership’s ability and the ability of its subsidiaries to: (i) create liens to secure indebtedness; (ii) enter into sale-leaseback transactions; and (iii) consolidate with or merge with or into, or sell substantially all of the Partnership’s properties to, another person.

Events of Default

Upon a continuing event of default, the trustee or the holders of 25% of the principal amount of the Notes may declare the Notes immediately due and payable, except that a default resulting from a bankruptcy or insolvency with respect to the Partnership or any subsidiary of the Partnership that is a significant subsidiary or any group of its subsidiaries that, taken as a whole, would constitute a significant subsidiary of the Partnership, will automatically cause all Notes to become due and payable. Each of the following constitutes an event of default under the Indenture:

The foregoing description of the Indenture does not purport to be complete and is qualified in its entirety by reference to the full text of the Indenture and the form of 5.50% Senior Note, which are incorporated herein by reference to the Partnership’s Current Report on Form 8-K dated September 15, 2017.

Item 2.03 Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant.

The information required by Item 2.03 relating to the Notes, the Indenture and the Purchase Agreement is contained in Item 1.01 of this Current Report on Form 8-K above and is incorporated herein by reference.

(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.