Kirby Corp (NYSE: KEX) CEO Grzebinski converts RSUs and updates share holdings

Rhea-AI Filing Summary

Kirby Corporation CEO and director David W. Grzebinski reported equity award activity in Kirby Corp (KEX). On January 24, 2026, 8,150 restricted stock units were converted (transaction code M) into 8,150 shares of common stock at a stated price of $0 per share. On the same date, 3,244 shares of common stock were disposed of in a separate transaction coded F at $128.7 per share. After these transactions, Grzebinski directly held 84,615 shares of Kirby common stock. The restricted stock units were originally granted on January 29, 2021 and vest in five equal annual installments beginning January 24, 2022, with the issuer able to deliver either cash or common shares on each vesting date.

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

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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)
01/24/2026

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	01/24/2026		M		8,150	A	$0(1)	87,859	D
Common Stock, par value $0.10 per share	01/24/2026		F		3,244	D	$128.7	84,615	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)	01/24/2026		M			8,150	(2)	(2)	Common Stock	8,150	$0	0	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 29, 2021, vest in five equal annual installments beginning on January 24, 2022. 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	01/27/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did Kirby Corp (KEX) report for David W. Grzebinski?

The filing shows that on January 24, 2026, CEO and director David W. Grzebinski converted 8,150 restricted stock units into 8,150 shares of Kirby common stock at a stated price of $0 per share, followed by a separate transaction involving 3,244 shares at $128.7 per share.

How many Kirby Corp (KEX) shares does David W. Grzebinski own after this Form 4?

Following the reported transactions on January 24, 2026, David W. Grzebinski directly owned 84,615 shares of Kirby Corporation common stock.

What happened to the restricted stock units reported for Kirby Corp (KEX)?

The Form 4 shows 8,150 restricted stock units were converted (transaction code M) into 8,150 shares of Kirby common stock on January 24, 2026 at a stated price of $0 per share.

What does the transaction code F mean in the Kirby Corp (KEX) Form 4?

The filing reports a transaction coded F for 3,244 shares of Kirby common stock at $128.7 per share on January 24, 2026. The code identifies the type of transaction but the excerpt does not further describe its purpose.

When were the Kirby Corp (KEX) restricted stock units originally granted and how do they vest?

The restricted stock units were granted on January 29, 2021 and vest in five equal annual installments beginning on January 24, 2022. On each vesting date, cash or shares of common stock of Kirby, at the issuer's election, are delivered to the reporting person.

Is the Kirby Corp (KEX) CEO’s interest in these restricted stock units in cash, stock, or both?

Each restricted stock unit represents a contingent right to receive cash or one share of Kirby common stock, with the choice between cash and shares made by the issuer on each vesting date.