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 18, 2017

The Williams Companies, Inc.

(Exact name of registrant as specified in its charter)

(918) 573-2000

(Registrant’s telephone number, including area code)

Not Applicable

(Former name or former address, if changed since last report)

Williams Partners L.P.

(Exact name of registrant as specified in its charter)

(918) 573-2000

(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:

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 August 18, 2017, the United States Court of Appeals for the Second Circuit issued a decision in the matter of Constitution Pipeline Company, LLC (“Constitution”) v. New York State Department of Environmental Conservation (“Department”) (Docket No. 16-1568). The Second Circuit denied Constitution’s petition for review of the Department’s decision denying certification under Section 401 of the Clean Water Act. However, the Second Circuit determined that it lacked jurisdiction over Constitution’s legal challenge related to the timeliness of the Department’s decision and, therefore, whether the Department had waived the Section 401 certification. The Second Circuit further recognized that jurisdiction over such issue lies with the District of Columbia Circuit court. As stated in the Form 10-Q filings on August 3, 2017 by The Williams Companies, Inc. and Williams Partners L.P. (collectively, “Williams”), Williams continues to target an in-service date for such project as early as the first half of 2019, which assumes the timely receipt of a Notice to Proceed from the Federal Energy Regulatory Commission.

Portions of this document may constitute “forward-looking statements” as defined by federal law. Although Williams believes any such statements are based on reasonable assumptions, there is no assurance that actual outcomes will not be materially different. Any such statements are made in reliance on the “safe harbor” protections provided under the Private Securities Litigation Reform Act of 1995. Additional information about issues that could lead to material changes in performance is contained in Williams’ annual and quarterly reports filed with the Securities and Exchange Commission. Williams undertakes no obligation to update or revise forward-looking statements, whether as a result of new information, future events, or otherwise.

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 thereunto duly authorized.

DATED: August 21, 2017