[Form 4] Kirby Corporation Insider Trading Activity

Rhea-AI Filing Summary

Kirby Corp. (KEX) Executive VP, General Counsel & Secretary Amy D. Husted filed a Form 4 covering transactions on 5-Aug-2025.

• RSU vesting (Code M): 186 common shares were acquired at a stated price of $0 as restricted stock units vested.
• Tax withholding sale (Code F): 74 shares were automatically sold at $102.16 to cover associated liabilities.
• Post-transaction holdings: 11,760 common shares held directly; 744 RSUs remain outstanding.

The filing reflects a net increase of 112 shares to the insider’s direct ownership, signalling continued equity exposure by a senior officer. The dollar value of shares sold for taxes (~$7.6 k) is immaterial relative to Kirby’s market capitalization, so market impact should be limited.

Insights

Senior Securities Analyst

TL;DR Small RSU vest; limited tax sale—neutral signal, immaterial to KEX valuation.

The transaction is routine: RSUs granted 5-Aug-2024 begin their five-year vesting schedule. Husted converted 186 units and retained the majority (112 shares after withholding) at no cost, modestly increasing her aligned stake. The automatic sale of 74 shares at $102.16 was purely for tax coverage and doesn’t indicate discretionary selling. With only 11.8 k shares now owned versus Kirby’s ~60 m share count, the change is <0.01% of outstanding and therefore non-impactful for fundamental or governance assessments.

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^*

Husted Amy D.

(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)
	Exec VP General Counsel & Sec

3. Date of Earliest Transaction (Month/Day/Year)
08/05/2025

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	08/05/2025		M		186	A	$0(1)	11,834	D
Common Stock, par value $0.10 per share	08/05/2025		F		74	D	$102.16	11,760	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)	08/05/2025		M			186	(2)	(2)	Common Stock	186	$0	744	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 August 5, 2024, vest in five equal annual installments beginning on August 5, 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.

	Ronald A. Dragg, Agent and Attorney-in-Fact	08/06/2025
	** 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 did Kirby Corp. insider Amy Husted report on Form 4?

She reported the vesting of 186 RSUs and the sale of 74 shares for tax withholding on 5-Aug-2025.

How many Kirby (KEX) shares does Amy Husted own after the transaction?

The filing lists 11,760 common shares held directly plus 744 unvested RSUs.

What price were the Kirby shares sold at for taxes?

Shares were sold at $102.16 per share under transaction code F.

Does the Form 4 indicate discretionary selling by the insider?

No. The 74-share sale was automatic tax withholding; the insider kept a net 112 additional shares.

Why were the RSUs exercised at $0?

RSUs convert to shares at no cost to the holder upon vesting, hence the $0 exercise price.