ASIX Form 4: Achilles Kintiroglou reports 577-share sale at $20

Rhea-AI Filing Summary

The filing shows that Achilles B. Kintiroglou, SVP and General Counsel of AdvanSix Inc. (ASIX), sold 577 shares of the company's common stock on 10/03/2025 at a reported price of $20 per share, reducing his direct beneficial ownership to 30,265 shares. The sale was executed under a pre-existing Rule 10b5-1 trading plan adopted on 11/12/2024, and is reported on a Form 4 signed by the reporting person on 10/03/2025. No derivative transactions are reported and no other changes to ownership are disclosed.

Positive

• Sale executed under Rule 10b5-1 plan, indicating prearranged transaction (adopted 11/12/2024)
• Only a modest number of shares sold (577), retaining 30,265 shares beneficially owned

Negative

• None.

Insights

Corporate Insider Disclosure Analyst

Insider sold 577 shares at $20 under a Rule 10b5-1 plan.

This Form 4 documents a single open-market sale by Achilles B. Kintiroglou on 10/03/2025, executed pursuant to a Rule 10b5-1 plan established on 11/12/2024. The filing reports the sale price as $20 and shows remaining direct ownership of 30,265 shares.

Because the sale was made under a documented 10b5-1 plan, it indicates the trade was prearranged rather than an opportunistic transaction; the Form discloses no derivative positions or additional transactions.

Insider Trade Summary

Net Seller: 577 shares ($11,540)

Net Sell 1 txn

Insider Kintiroglou Achilles B.

Role SVP, General Counsel

Sold 577 shs ($12K)

Type	Security	Shares	Price	Value
Sale	Common Stock, par value $0.01	577	$20.00	$12K

Holdings After Transaction: Common Stock, par value $0.01 — 30,265 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).

1. Name and Address of Reporting Person^*

Kintiroglou Achilles B.

(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, General Counsel

3. Date of Earliest Transaction (Month/Day/Year)
10/03/2025

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 $0.01	10/03/2025		S		577(1)	D	$20	30,265	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. The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 12, 2024.

Remarks:

	/s/ Achilles B. Kintiroglou	10/03/2025
	** 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 ASIX insider Achilles Kintiroglou do on 10/03/2025?

He sold 577 shares of AdvanSix common stock at a reported price of $20 per share.

Was the 10/03/2025 sale by the ASIX insider part of a trading plan?

Yes. The sale was effected pursuant to a Rule 10b5-1 trading plan adopted on 11/12/2024.

How many ASIX shares does Achilles Kintiroglou own after the transaction?

Following the reported sale, he beneficially owns 30,265 shares directly.

Did the Form 4 report any option or derivative transactions for ASIX?

No. Table II shows no derivative securities were acquired or disposed of in this filing.

What is the reporting person's role at ASIX?

The filing lists his relationship as SVP, General Counsel and an officer of the company.