Material Agreement · New Debt / Obligation

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):  June 26, 2017 Kirby Corporation (Exact name of registrant as specified in its charter) Nevada 1-7615 74-1884980 (State or other jurisdiction of (Commission File Number) (I.R.S. Employer incorporation or organization)   Identification No.) 55 Waugh Drive, Suite 1000   77007 Houston, Texas   (Zip Code) (Address of principal executive offices)     Registrant’s telephone number, including area code: (713) 435-1000 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: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 or Rule 12b-2 of the Securities Exchange Act of 1934 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. On June 26, 2017, Kirby Corporation entered into an amendment of its existing Credit Agreement with a group of commercial banks that increases the borrowing limit under Kirby’s previous revolving credit facility from $550 million to $850 million and extends the maturity date of the facility to June 26, 2022.  The Credit Agreement, as amended, provides for a variable interest rate based on the London interbank offered rate (“LIBOR”) or a base rate calculated with reference to the agent bank’s prime rate, among other factors (the “Base Rate”).  The interest rate varies with Kirby’s credit rating and is currently 100 basis points over LIBOR or equal to the Base Rate.  In addition, the Credit Agreement allows for a $300 million increase in the aggregate commitments of the banks in the form of revolving credit loans or term loans, subject to the consent of each bank that elects to participate in the increased commitment.  Borrowings under the facility are used for general corporate purposes, including acquisitions.  As of June 26, 2017, Kirby had outstanding borrowings under the facility of $104,974,000. The foregoing summary of the terms of the Credit Agreement is qualified in its entirety by reference to the copy of the Agreement filed as Exhibit 10.1 to this report. Item 2.03. Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The discussion of the amendment to the Credit Agreement in Item 1.01 is incorporated by reference into this Item 2.03. Item 9.01. Financial Statements and Exhibits. (d)  Exhibits Exhibit Number Description of Exhibit     10.1 First Amendment to Credit Agreement dated as of June 26, 2017 among Kirby Corporation, JPMorgan Chase Bank, N.A., as Administrative Agent, and the banks named therein. 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 thereunto duly authorized.   KIRBY CORPORATION     (Registrant)             By: /s/ C. Andrew Smith       C. Andrew Smith       Executive Vice President       and Chief Financial Officer   Dated:  June 28, 2017 EXHIBIT INDEX Exhibit Number   Description of Exhibit         10.1   — First Amendment to Credit Agreement dated as of June 26, 2017 among Kirby Corporation, JPMorgan Chase Bank, N.A., as Administrative Agent, and the banks named therein.