UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended September 30, 2020 ☐ Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission File Number 1-7615 KIRBY CORPORATION (Exact name of registrant as specified in its charter) Nevada 74-1884980 (State or other jurisdiction of incorporation or organization) (IRS Employer I ...