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 28, 2017

Tallgrass Energy GP, 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.  ☐

On December 28, 2017, Tallgrass MLP GP, LLC (“TEP GP”), the general partner of Tallgrass Energy Partners, LP (“TEP”), entered into Amendment No. 1 (the “Amendment”) to Amended and Restated Agreement of Limited Partnership of TEP, dated as of May 17, 2013 (the “Partnership Agreement”), in response to certain changes to the Internal Revenue Code enacted by the Bipartisan Budget Act of 2015 relating to partnership audit and adjustment procedures.

Tallgrass Energy GP, LP (“TEGP”) is the managing member of, and therefore controls, Tallgrass Equity, LLC (“Tallgrass Equity”). Tallgrass Equity, in turn, controls TEP through the direct ownership of 100% of TEP GP. As a result, under generally accepted accounting principles, TEGP consolidates Tallgrass Equity, TEP GP, TEP, and TEP’s subsidiaries. TEGP has no operations outside of its indirect ownership interests in TEP.

The foregoing description of the Amendment does not purport to be complete and is qualified in its entirety by reference to the complete text of the Amendment, a copy of which is filed as Exhibit 3.1 to this Current Report on Form 8-K and incorporated herein by reference.

On December 28, 2017, TEP issued a press release announcing that Continental Resources, Inc. exercised its contractual right to extend its Throughput and Deficiency Agreements to ship crude oil with Belle Fourche Pipeline Company and with the TEP’s subsidiary, Tallgrass Pony Express Pipeline, LLC, through October 31, 2024. A copy of the press release is furnished with this Form 8-K as Exhibit 99.1 and incorporated into this Item 7.01 by reference.

The information in this Item 7.01 of Form 8-K, including the accompanying Exhibit 99.1, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 (the “Exchange Act”), or otherwise subject to the liability of such section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933 or the Exchange Act, regardless of the general incorporation language of such filing, except as shall be expressly set forth by specific reference in such filing.

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.