AdvanSix Inc. 10-Q

ITEM 5. OTHER INFORMATION Insider Rule 10b5-1 Trading Plans During the quarter ended September 30, 2025, none of our directors or executive officers adopted or terminated a "Rule 10b5-1 trading arrangement" or a "non-Rule 10b5-1 trading arrangement" as those terms are defined in Item 408 of Regulation S-K. 28 ITEM 6. EXHIBITS Exhibit Description 3.1 Amended and Restated Certificate of Incorporation of AdvanSix Inc. (conformed copy) (incorporated by reference to Exhibit 3.1 to the Company’s Quarterly Report on Form 10-Q filed on August 1, 2025) 3.2 Amended and Restated By-laws of AdvanSix Inc. (incorporated by reference to Exhibit 3.1 to the Company's Current Report on Form 8-K filed on June 20, 2023). 10.1 Employment Separation Agreement and Release between AdvanSix Inc. and Siddharth Manjeshwar, dated July 9, 2025 † 10.2 Amendment No. 2 to Credit Agreement, dated as of October 23, 2025, among AdvanSix Inc., the guarantors, the lenders signatory thereto and Truist Bank, as the administrative agent (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K filed on October 23, 2025) 31.1 Rule 13a-14(a)/15d-14(a) Certification of the Company’s Principal Executive Officer. 31.2 Rule 13a-14(a)/15d-14(a) Certification of the Company’s Principal Financial Officer. 32.1 Section 1350 Certification of the Company’s Principal Executive Officer. The information contained in this Exhibit shall not be deemed filed with the SEC nor incorporated by reference in any registration statement filed by the registrant under the Securities Act of 1933, as amended. 32.2 Section 1350 Certification of the Company’s Principal Financial Officer. The information contained in this Exhibit shall not be deemed filed with the SEC nor incorporated by reference in any registration statement filed by the registrant under the Securities Act of 1933, as amended. 101.INS Inline XBRL Instance Document - The instance document does not appear in the interactive data file because its XBRL tags are embedded within the inline XBRL document. 101.SCH Inline XBRL Taxonomy Extension Schema Document 101.CAL Inline XBRL Taxonomy Extension Calculation Linkbase Document 101.DEF Inline XBRL Taxonomy Extension Definition Linkbase Document 101.LAB Inline XBRL Taxonomy Extension Label Linkbase Document 101.PRE Inline XBRL Taxonomy Extension Presentation Linkbase Document 104 Cover Page Interactive Data File (formatted as Inline XBRL and included in Exhibit 101) † Indicates management contract or compensatory plan. 29 SIGNATURE 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. Date: November 7, 2025 By: /s/ Christopher Gramm Christopher Gramm Vice President and Interim Chief Financial Officer 30