Executive Change · Reg FD Disclosure

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 17, 2017 Kirby Corporation (Exact name of registrant as specified in its charter) Nevada 1-7615 74-1884980 (State or other jurisdiction of incorporation or organization) (Commission File Number) (I.R.S. Employer 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 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. On August 17, 2017, C. Andrew Smith, Executive Vice President and Chief Financial Officer of Kirby Corporation, informed the company that he is resigning from his position effective September 7, 2017 to accept another opportunity.  Upon the effectiveness of Mr. Smith’s resignation, David W. Grzebinski, President and Chief Executive Officer of Kirby, will serve in the dual roles of Chief Executive Officer and Chief Financial Officer on an interim basis until Kirby identifies a new Chief Financial Officer. Item 7.01. Regulation FD Disclosure. On August 17, 2017, Kirby issued a press release announcing the changes described in Item 5.02.  A copy of the press release is furnished with this report as Exhibit 99.1. Item 9.01. Financial Statements and Exhibits   (d) Exhibits   99.1 Press Release of Kirby Corporation dated August 17, 2017 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:  August 17, 2017 EXHIBIT INDEX Exhibit Number   Description of Exhibit       99.1   —Press Release of Kirby Corporation dated August 17, 2017