KIRBY CORP 10-Q

Item 1A. Risk Factors The Company continues to be subject to the risk factors previously disclosed in its “Risk Factors” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020. 32 Item 6. Exhibits EXHIBIT INDEX Exhibit Number Description of Exhibits 3.1 – Restated Articles of Incorporation of the Company with all amendments to date (incorporated by reference to Exhibit 3.1 to the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2014). 3.2 – Bylaws of the Company, as amended to March 17, 2020 (incorporated by reference to Exhibit 3.2 to the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2014). 3.3 – Amendment to Bylaws of Kirby Corporation dated March 18, 2020 (incorporated by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K filed with the Commission on March 19, 2020). 4.1 – See Exhibits 3.1, 3.2, and 3.3 hereof for provisions of our Restated Articles of Incorporation of the Company with all amendments to date, the Bylaws of the Company, as amended to March 17, 2020, and Amendment to Bylaws of the Company dated March 18, 2020 (incorporated by reference to Exhibit 3.1 and 3.2 , respectively, to the Registrant's Annual Report on Form 10-K for the year ended December 31, 2014 and Exhibit 3.1 to the Registrant’s Current Report on Form 8-K filed with the Commission on March 19, 2020). 31.1 – Certification of Chief Executive Officer Pursuant to Rule 13a-14(a) 31.2 – Certification of Chief Financial Officer Pursuant to Rule 13a-14(a) 32 – Certification Pursuant to 18 U.S.C. Section 1350 101.INS – Inline XBRL Instance Document – the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document 101.SCH – Inline XBRL Taxonomy Extension Schema Document 101.CAL – Inline XBRL Taxonomy Extension Calculation Linkbase Document 101.DEF – Inline XBRL Taxonomy Extension Definition Linkbase Document 101.LAB – Inline XBRL Taxonomy Extension Label Linkbase Document 101.PRE – Inline XBRL Taxonomy Extension Presentation Linkbase Document 104 – Cover Page Interactive Data File (embedded within the Inline XBRL document) 33 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/ William G. Harvey William G. Harvey Executive Vice President and Chief Financial Officer Dated: November 8, 2021 34