[Form 4] KIRBY CORP Insider Trading Activity

Kirby Corp CEO David W. Grzebinski, who is also a director, reported multiple equity transactions dated February 3, 2026.

Rhea-AI Filing Summary

Kirby Corp CEO David W. Grzebinski, who is also a director, reported multiple equity transactions dated February 3, 2026. He acquired 22,470 shares of Kirby common stock at a price of $0 through the exercise of restricted stock units, bringing his directly held common shares to 107,085 before a subsequent disposition.

On the same date, he disposed of 8,844 common shares at $120.68 per share, leaving 98,241 common shares held directly afterward. Several blocks of restricted stock units granted between 2022 and 2025 partially vested, each unit representing a contingent right to receive cash or one Kirby common share, with remaining units continuing to vest in equal annual installments on future February 3 dates.

Insider Trade Summary

22,470 shares exercised/converted

Exercise 6 txns

Insider Grzebinski David W

Role CEO

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	6,820	$0.00	$0.00
Exercise	Restricted Stock Units	6,572	$0.00	$0.00
Exercise	Restricted Stock Units	4,955	$0.00	$0.00
Exercise	Restricted Stock Units	4,123	$0.00	$0.00
Exercise	Common Stock, par value $0.10 per share	22,470	$0.00	$0.00
Exercise Price or Tax Liability	Common Stock, par value $0.10 per share	8,844	$120.68	$1.07M

Holdings After Transaction: Restricted Stock Units — 51,321 contracts (Direct); Common Stock, par value $0.10 per share — 98,241 shares (Direct)

Footnotes (5)

1. F1. Each restricted stock unit represents a contingent right to receive cash or one share of common stock of the issuer.
2. F2. These restricted stock units granted on January 28, 2022, vest in five equal annual installments beginning on February 3, 2023. 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.
3. F3. These restricted stock units granted on February 1, 2023, vest in five equal annual installments beginning on February 3, 2024. 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. F4. These restricted stock units granted on February 2, 2024, vest in five equal annual installments beginning on February 3, 2025. 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. F5. These restricted stock units granted on January 31, 2025, vest in five equal annual installments beginning on February 3, 2026. 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.

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Accepted by SEC EDGAR 02/05/2026 - 09:03 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Grzebinski David W

(Last) (First) (Middle)

55 WAUGH DRIVE

SUITE 1000

(Street)

HOUSTON TX 77007

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
KIRBY CORP [ KEX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CEO

3. Date of Earliest Transaction (Month/Day/Year)
02/03/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

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. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction 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)
			Code	V	Amount	(A) or (D)	Price
Common Stock, par value $0.10 per share	02/03/2026		M		22,470	A	$0(1)	107,085	D
Common Stock, par value $0.10 per share	02/03/2026		F		8,844	D	$120.68	98,241	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction 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 (Month/Day/Year)		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: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	(1)	02/03/2026		M			6,820	(2)	(2)	Common Stock	6,820	$0	6,820	D
Restricted Stock Units	(1)	02/03/2026		M			6,572	(3)	(3)	Common Stock	6,572	$0	13,144	D
Restricted Stock Units	(1)	02/03/2026		M			4,955	(4)	(4)	Common Stock	4,955	$0	14,865	D
Restricted Stock Units	(1)	02/03/2026		M			4,123	(5)	(5)	Common Stock	4,123	$0	16,492	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. These restricted stock units granted on January 28, 2022, vest in five equal annual installments beginning on February 3, 2023. 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.

3. These restricted stock units granted on February 1, 2023, vest in five equal annual installments beginning on February 3, 2024. 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 2, 2024, vest in five equal annual installments beginning on February 3, 2025. 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, 2025, vest in five equal annual installments beginning on February 3, 2026. 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.

	Ronald A. Dragg, Agent and Attorney-in-Fact	02/05/2026
	** Signature of Reporting Person	Date
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