Initial Statement of Beneficial Ownership (Form 3)

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES 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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(Print or Type Responses)

1. Name and Address of Reporting Person * Gramm Christopher 2. Date of Event Requiring Statement (Month/Day/Year) 07/09/2025 3. Issuer Name and Ticker or Trading Symbol AdvanSix Inc. [ASIX] (Last) (First) (Middle) 300 KIMBALL DRIVE, SUITE 101 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) VP and Interim CFO 5. If Amendment, Date Original Filed (Month/Day/Year) (Street) PARSIPPANY, NJ 07054 6. Individual or Joint/Group Filing (Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Common Stock, par value $0.01 54,570(1) D

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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (right to buy)	(2)	03/08/2027	Common Stock, par value $0.01	8,590	$26.66	D
Stock Option (right to buy)	(3)	03/02/2028	Common Stock, par value $0.01	6,406	$41.97	D
Stock Option (right to buy)	(4)	02/27/2029	Common Stock, par value $0.01	9,019	$33.34	D
Stock Option (right to buy)	(5)	02/24/2031	Common Stock, par value $0.01	7,133	$29.21	D
Stock Option (right to buy)	(6)	02/28/2032	Common Stock, par value $0.01	5,264	$39.15	D
Stock Option (right to buy)	(7)	02/28/2033	Common Stock, par value $0.01	4,088	$41.2	D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Gramm Christopher 300 KIMBALL DRIVE, SUITE 101 PARSIPPANY, NJ 07054			VP and Interim CFO

Signatures

/s/ Achilles B. Kintiroglou for Christopher Gramm		07/17/2025
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(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).
(1)	Amount includes 18,376 unvested restricted stock units granted pursuant to the 2016 Stock Incentive Plan of AdvanSix Inc. and its Affiliates, as Amended and Restated (the "Stock Plan").
(2)	Grant of stock options pursuant to the Stock Plan, which vested in three equal annual installments on the first three anniversaries of the grant date of March 8, 2017.
(3)	Grant of stock options pursuant to the Stock Plan, which vested in three equal annual installments on the first three anniversaries of the grant date of March 2, 2018.
(4)	Grant of stock options pursuant to the Stock Plan, which vested in three equal annual installments on the first three anniversaries of the grant date of February 27, 2019.
(5)	Grant of stock options pursuant to the Stock Plan, which vested in three equal annual installments on the first three anniversaries of the grant date of February 24, 2021.
(6)	Grant of stock options pursuant to the Stock Plan, which vested in three equal annual installments on the first three anniversaries of the grant date of February 28, 2022.
(7)	Grant of stock options pursuant to the Stock Plan, which are scheduled to vest in three equal annual installments on the first three anniversaries of the grant date of February 28, 2023.

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