Kirby (NYSE: KEX) VP–CIO Miller settles RSUs and disposes 1,311 shares

Rhea-AI Filing Summary

Kirby Corporation VP–CIO Scott P. Miller reported equity compensation activity involving restricted stock units and common shares. On February 3, 2026, Miller acquired 5,375 shares of Kirby common stock at $0 per share through transactions coded M, increasing his directly held common stock to 8,836 shares.

That same day, a separate transaction coded F shows a disposition of 1,311 common shares at $120.68 per share, leaving Miller with 7,525 directly owned common shares. Multiple restricted stock unit grants vested, with portions converting into common stock while remaining RSUs continue to vest in annual installments.

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

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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^*

MILLER SCOTT P

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	VP - CIO

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		5,375	A	$0(1)	8,836	D
Common Stock, par value $0.10 per share	02/03/2026		F		1,311	D	$120.68	7,525	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			1,591	(2)	(2)	Common Stock	1,591	$0	1,591	D
Restricted Stock Units	(1)	02/03/2026		M			1,664	(3)	(3)	Common Stock	1,664	$0	3,328	D
Restricted Stock Units	(1)	02/03/2026		M			1,433	(4)	(4)	Common Stock	1,433	$0	4,299	D
Restricted Stock Units	(1)	02/03/2026		M			687	(5)	(5)	Common Stock	687	$0	2,748	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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FAQ

What insider transaction did Kirby (KEX) VP–CIO Scott P. Miller report?

Scott P. Miller reported equity compensation activity on February 3, 2026. He acquired 5,375 Kirby common shares via restricted stock unit settlements and disposed of 1,311 shares in a separate transaction coded F, ending with 7,525 directly owned common shares.

How many Kirby (KEX) common shares does Scott P. Miller hold after this Form 4?

After the reported transactions on February 3, 2026, Scott P. Miller directly owns 7,525 Kirby common shares. This reflects acquisition of 5,375 shares at $0 per share and a disposition of 1,311 shares at $120.68 per share on the same date.

What does the transaction code M indicate in Scott P. Miller’s Kirby (KEX) Form 4?

Transaction code M on the Form 4 indicates exercises or settlements of derivative securities into common stock. Miller’s code M entries show restricted stock units converting into Kirby common shares at a price of $0 per share on February 3, 2026.

What does the transaction code F represent in this Kirby (KEX) insider filing?

The Form 4 shows a transaction coded F for 1,311 Kirby common shares at $120.68 per share. Code F designates a disposition of shares, recorded here alongside the same-day equity award settlements reported by Scott P. Miller.

How are Kirby (KEX) restricted stock units structured for Scott P. Miller?

Each restricted stock unit represents a contingent right to receive cash or one Kirby common share. The grants vest in five equal annual installments, with cash or shares delivered on or as soon as practicable after each vesting date, at the issuer’s election.

What vesting schedule applies to Scott P. Miller’s Kirby (KEX) RSU grants?

Miller’s RSUs granted in 2022, 2023, 2024, and 2025 each vest in five equal annual installments. Vesting begins one year after the specified grant-related February 3 date, with cash or shares delivered on or as soon as practicable after each vesting date.