OTHER INFORMATION.
−Removed: During the three months ended March 31, 2026, none of our directors or officers (as defined in Rule 16a-1(f) of the Securities Exchange Act of 1934, as amended) informed us of the adoption or termination of a Rule 10b5-1 trading arrangement or non-Rule 10b5-1 trading arrangement (as such terms are defined in Item 408 of Regulation S-K of the Securities Act of 1933, as amended).
−Removed: Certifications Required by Rule 13a-14(a) of the Securities Exchange Act of 1934, as amended, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 (*)
−Removed: Certifications Required by Rule 13a-14(a) of the Securities Exchange Act of 1934, as amended, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 (*)
+Added: During the three months ended June 30, 2026, none of our directors or officers (as defined in Rule 16a-1(f) of the Securities Exchange Act of 1934, as amended) informed us of the adoption or termination of a Rule 10b5-1 trading arrangement or non-Rule 10b5-1 trading arrangement (as such terms are defined in Item 408 of Regulation S-K).
+Added: Number Description
+Added: 10.1 Alto Ingredients, Inc.
+Added: 2026 Omnibus Incentive Plan (***)
+Added: 31.1 Certification of Chief Executive Officer Required by Rule 13a-14(a) of the Securities Exchange Act of 1934, as amended, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 (*)
+Added: 31.2 Certification of Chief Financial Officer Required by Rule 13a-14(a) of the Securities Exchange Act of 1934, as amended, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 (*)
32.1 Certification of Chief Executive Officer and Chief Financial Officer Pursuant to 18 U.S.C.
Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (**)
−Removed: XBRL Instance Document (*)
−Removed: XBRL Taxonomy Extension Schema (*)
−Removed: XBRL Taxonomy Extension Calculation Linkbase (*)
−Removed: XBRL Taxonomy Extension Definition Linkbase (*)
−Removed: XBRL Taxonomy Extension Label Linkbase (*)
−Removed: XBRL Taxonomy Extension Presentation Linkbase (*)
+Added: 101.INS Inline XBRL Instance Document (*)
+Added: 101.SCH Inline XBRL Taxonomy Extension Schema Document (*)
+Added: 101.CAL Inline XBRL Taxonomy Extension Calculation Linkbase Document (*)
+Added: 101.DEF Inline XBRL Taxonomy Extension Definition Linkbase Document (*)
+Added: 101.LAB Inline XBRL Taxonomy Extension Label Linkbase Document (*)
+Added: 101.PRE Inline XBRL Taxonomy Extension Presentation Linkbase Document (*)
104 Cover Page Interactive Data File (formatted as Inline XBRL with applicable taxonomy extension information contained in Exhibits 101) (*)
(*) Filed herewith.
−Removed: Pursuant to the requirements
−Removed: of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto
−Removed: duly authorized.
+Added: (**) Furnished herewith.
+Added: This certification shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and shall not be deemed to be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, except to the extent that the registrant specifically incorporates it by reference.
+Added: (***) Previously filed as an exhibit to the Registrant’s Current Report on Form 8-K filed with the Securities and Exchange Commission on June 23, 2026.
+Added: 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.
ALTO INGREDIENTS, INC.
+Added: August 7, 2026 By:
+Added: /s/ ROBERT R.
Chief Financial Officer
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.