[Form 4] KIRBY CORP Insider Trading Activity

Rhea-AI Filing Summary

Kirby Corp (KEX) CEO and director exercised employee stock options and sold the resulting shares. On 11/21/2025, the insider exercised 29,451 employee stock options with an exercise price of $73.93 per share, receiving the same number of Kirby common shares. The same day, 29,451 common shares were sold in an open market transaction at a weighted average price of $107.41 per share, with individual sale prices ranging from $106.87 to $108.12 per share. After these transactions, the insider directly beneficially owned 79,709 Kirby common shares, and the reported option grant was fully exercised, leaving 0 derivative securities from that grant.

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)
11/21/2025

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	11/21/2025		M		29,451	A	$73.93	109,160	D
Common Stock, par value $0.10 per share	11/21/2025		S		29,451	D	$107.41(1)	79,709	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
Employee Stock Options (Right to Buy)	$73.93	11/21/2025		M			29,451	02/01/2022	02/01/2026	Common Stock	29,451	$0	0	D

Explanation of Responses:

1. The reported price is the weighted average sales price. The sales were at prices ranging from $106.87 to $108.12 per share. The reporting person will provide, upon request by the commission staff, full information regarding the number of shares sold at each separate price.

	Ronald A. Dragg, Agent and Attorney-in-Fact	11/24/2025
	** 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 on this Form 4?

The CEO and director reported exercising 29,451 employee stock options at $73.93 per share and selling 29,451 common shares on 11/21/2025.

At what prices were the Kirby Corp (KEX) shares sold by the insider?

The insider’s 29,451 common shares were sold at a weighted average price of $107.41 per share, with individual sale prices between $106.87 and $108.12.

How many Kirby Corp (KEX) shares does the insider own after this transaction?

Following the reported transactions, the insider directly beneficially owned 79,709 shares of Kirby Corp common stock.

What happened to the employee stock options reported for Kirby Corp (KEX)?

The insider exercised 29,451 employee stock options with a $73.93 exercise price that were originally exercisable from 02/01/2022 and expiring on 02/01/2026, leaving 0 options remaining from that grant.

What is the role of the reporting person at Kirby Corp (KEX)?

The reporting person is both a director and an officer, serving as CEO of Kirby Corp.

Is the Kirby Corp (KEX) insider transaction part of a Rule 10b5-1 trading plan?

The form includes a check box for indicating transactions under a Rule 10b5-1(c) trading plan, but the excerpt does not show that this box was marked.