AdvanSix (NYSE: ASIX) SVP stock withheld to cover taxes

Rhea-AI Filing Summary

AdvanSix Inc. senior vice president and chief human resources officer Kelly Slieter reported a tax-related share disposition. On February 28, 2026, 5,424 shares of common stock were withheld at $17.47 per share to satisfy tax obligations from vested restricted stock units.

After this withholding, Slieter directly owned 65,029 shares of AdvanSix common stock.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider SLIETER KELLY

Role SVP, Chief HR Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock, par value $0.01	5,424	$17.47	$95K

Holdings After Transaction: Common Stock, par value $0.01 — 65,029 shares (Direct)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

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^*

SLIETER KELLY

(Last) (First) (Middle)

300 KIMBALL DRIVE, SUITE 101

(Street)

PARSIPPANY NJ 07054

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
AdvanSix Inc. [ ASIX ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, Chief HR Officer

3. Date of Earliest Transaction (Month/Day/Year)
02/28/2026

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 $0.01	02/28/2026		F		5,424(1)	D	$17.47	65,029	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

Explanation of Responses:

1. Shares withheld to satisfy tax withholding obligations related to Restricted Stock Units that vested on February 28, 2026.

Remarks:

	/s/ Achilles B. Kintiroglou for Kelly Slieter	03/03/2026
	** 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 AdvanSix (ASIX) report for Kelly Slieter?

AdvanSix reported that executive Kelly Slieter had 5,424 shares withheld to cover tax obligations from vested restricted stock units. This was a tax-withholding disposition, not an open-market sale, and reflects routine equity compensation processing.

How many AdvanSix (ASIX) shares were withheld for Kelly Slieter’s taxes?

A total of 5,424 AdvanSix common shares were withheld at $17.47 per share to satisfy tax withholding obligations. These shares related to restricted stock units that vested on February 28, 2026, under Slieter’s equity compensation.

Was Kelly Slieter’s AdvanSix (ASIX) Form 4 a stock sale on the market?

No, the Form 4 shows a tax-withholding disposition, not an open-market stock sale. Shares were automatically withheld by AdvanSix to cover taxes due on vested restricted stock units, a common feature of equity compensation programs.

How many AdvanSix (ASIX) shares does Kelly Slieter own after this transaction?

Following the tax-withholding transaction, Kelly Slieter directly owned 65,029 shares of AdvanSix common stock. This figure reflects her remaining direct holdings after 5,424 shares were withheld to satisfy tax obligations tied to vested restricted stock units.

What does transaction code F mean in the AdvanSix (ASIX) Form 4?

Transaction code F indicates shares used to pay an exercise price or tax liability. In this case, 5,424 AdvanSix shares were withheld to cover tax withholding obligations arising when Kelly Slieter’s restricted stock units vested on February 28, 2026.

How is the price per share reported in Kelly Slieter’s AdvanSix (ASIX) Form 4?

The Form 4 reports a price of $17.47 per AdvanSix share for the 5,424 withheld shares. This figure reflects the value used to determine the number of shares needed to satisfy Slieter’s tax withholding obligations on the vested restricted stock units.