Statement of Changes in Beneficial Ownership (4)

FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^* O'Neil Christian G.	2. Issuer Name and Ticker or Trading Symbol KIRBY CORP [ KEX ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) President-Kirby Inland Marine
(Last) (First) (Middle) 55 WAUGH DRIVE, SUITE 1000	3. Date of Earliest Transaction (MM/DD/YYYY) 1/22/2021
(Street) HOUSTON, TX 77007 (City) (State) (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) _X _ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. Code (Instr. 8)		4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock, par value $.10 per share	1/22/2021		M		3771	A	⁽¹⁾	25057	D
Common Stock, par value $.10 per share	1/22/2021		F		1477	D	$52.81	23580	D
Common Stock, par value $.10 per share	1/22/2021		F		858	D	$52.81	22722	D
Common Stock, par value $.10 per share								1900	I ⁽²⁾	401(k)

*Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)*
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)			11. Nature of Indirect Beneficial Ownership (Instr. 4)
Restricted Stock Units	⁽¹⁾	1/22/2021		M			1325	⁽³⁾	⁽³⁾	Common Stock	1325	$0	2650	D
Restricted Stock Units	⁽¹⁾	1/22/2021		M			1218	⁽⁴⁾	⁽⁴⁾	Common Stock	1218	$0	3654	D
Restricted Stock Units	⁽¹⁾	1/22/2021		M			1228	⁽⁵⁾	⁽⁵⁾	Common Stock	1228	$0	4912	D

Explanation of Responses:
(1)	Each restricted stock unit represents a contingent right to receive cash or one share of common stock of the issuer.
(2)	Acquired 93 shares during 2020 pursuant to the Kirby Corporation 401(k) plan. The information reported herein is based on a plan statement dated December 31, 2020.
(3)	These restricted stock units granted on February 22, 2018, vest in five equal annual installments beginning on January 24, 2019. Cash or shares of common stock of the issuer, at the election of the issuer, will be delivered to the reporting person on or as soon as practicable on each vesting date.
(4)	These restricted stock units granted on February 1, 2019, vest in five equal annual installments beginning on January 24, 2020. Cash or shares of common stock of the issuer, at the election of the issuer, will be delivered to the reporting person on or as soon as practicable on each vesting date.
(5)	These restricted stock units granted on January 31, 2020, vest in five equal annual installments beginning on January 24, 2021. Cash or shares of common stock of the issuer, at the election of the issuer, will be delivered to the reporting person on or as soon as practicable on each vesting date.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
O'Neil Christian G. 55 WAUGH DRIVE, SUITE 1000 HOUSTON, TX 77007			President-Kirby Inland Marine