1 unchanged sentence
Insider Rule 10b5-1 Trading Plans
−Removed: On March 13, 2026 , Achilles B.
−Removed: Kintiroglou , the Company’s Senior Vice President, General Counsel and Corporate Secretary , entered into a trading plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act.
−Removed: The plan provides for the sale of 2,000 shares and the exercise and sale of 2,530 stock options.
−Removed: Kintiroglou’s plan will expire on March 5, 2027 .
−Removed: On March 13, 2026 , Erin N.
−Removed: Kane , the Company’s President and Chief Executive Officer , entered into a trading plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act.
−Removed: The plan provides for the sale of 52,500 shares and the exercise and sale of 53,688 stock options.
−Removed: Kane’s plan will expire on March 5, 2027 .
+Added: On June 9, 2026 , Rachael Ryan , the Company’s Vice President, Controller and Chief Accounting Officer , entered into a trading plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act.
+Added: The plan provides for the sale of 3,880 shares of common stock.
+Added: Ryan’s plan will expire on December 31, 2027 .
3.1 Amended and Restated Certificate of Incorporation of AdvanSix Inc.
2 unchanged sentences
(incorporated by reference to Exhibit 3.1 to the Company's Current Report on Form 8-K filed on June 20, 2023).
+Added: 10.1 Offer of Employment Letter between AdvanSix Inc.
+Added: and Patrick C.
+Added: Day, dated April 13, 2026.
31.1 Rule 13a-14(a)/15d-14(a) Certification of the Company’s Principal Executive Officer.
11 unchanged sentences
104 Cover Page Interactive Data File (formatted as Inline XBRL and included in Exhibit 101)
+Added: † Indicates management contract or compensatory plan.
Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.
ADVANSIX INC.
+Added: August 7, 2026
/s/ Patrick C.
1 unchanged sentence
Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.