Results of Operations

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):  July 29, 2015 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))     Item 2.02. Results of Operations and Financial Condition   On July 29, 2015, Kirby Corporation (“Kirby”) issued a press release announcing earnings for the second quarter and first six months ended June 30, 2015.  A copy of the press release is attached as Exhibit 99.1 to this report. EBITDA, a non-GAAP financial measure, is used in the press release.  Kirby defines EBITDA as net earnings attributable to Kirby before interest expense, taxes on income, depreciation and amortization.  Kirby has historically evaluated its operating performance using numerous measures, one of which is EBITDA.  EBITDA is presented because of its wide acceptance as a financial indicator.  EBITDA is one of the performance measures used in Kirby’s incentive bonus plan.  EBITDA is also used by rating agencies in determining Kirby’s credit rating and by analysts publishing research reports on Kirby, as well as by investors and investment bankers generally in valuing companies.  A quantitative reconciliation of EBITDA to GAAP net earnings attributable to Kirby for the 2015 and 2014 second quarters and first six months is included in the press release. Item 9.01. Financial Statements and Exhibits     (d) Exhibits:   99.1 Press release dated July 29, 2015 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:  July 30, 2015       EXHIBIT INDEX Exhibit 99.1 Press release dated July 29, 2015