Entry into a Material Definitive Agreement. As previously disclosed, on January 10, 2025, Montana Renewables, LLC (“MRL”), as borrower, an unrestricted, non-guarantor subsidiary of Calumet, Inc. (the “Company”), and the U.S. Department of Energy (the “DOE”), as guarantor and loan servicer, executed a Loan Guarantee Agreement (“LGA”) for a loan that guarantees $1.44 billion of financing to fund the construction and expansion of the renewable fuels facility owned by MRL. On August 28, 2026, MRL…

Results of Operations and Financial Condition. On August 7, 2026, Calumet, Inc. reported results of operations for the quarter ended June 30, 2026, pursuant to a press release. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K. In accordance with General Instruction B.2 of Form 8-K, the information contained in this report shall not be deemed “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to the liabi…

Results of Operations and Financial Condition. On May 8, 2026, Calumet, Inc. reported results of operations for the quarter ended March 31, 2026, pursuant to a press release. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K. In accordance with General Instruction B.2 of Form 8-K, the information contained in this report shall not be deemed “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to the liabili…

Director — Jennifer G. Straumins: Jennifer G. Straumins decided not to stand for re-election and will retire from the Board at the end of her term.

Entry into a Material Definitive Agreement. On March 17, 2026, Calumet Specialty Products Partners, L.P. (the “Partnership”) and Calumet Finance Corp. (“Finance Corp.” and, together with the Partnership, the “Issuers”), each a subsidiary of Calumet, Inc. (the “Company”), issued $150.0 million aggregate principal amount of the Issuers’ 9.75% Senior Notes due 2031 (the “Additional Notes”) in a private placement conducted pursuant to Rule 144A and Regulation S under the Securities Act of 1933, a…

Creation of a Direct Financial Obligation. The information set forth in

Entry into a Material Definitive Agreement. Purchase Agreement On March 12, 2026, Calumet Specialty Products Partners, L.P. (the “Partnership”), Calumet Finance Corp. (“Finance Corp.” and, together with the Partnership, the “Issuers”), Calumet, Inc. (the “Company”), Calumet GP, LLC (the “General Partner”) and certain subsidiary guarantors named therein (the “Subsidiary Guarantors”) entered into a purchase agreement (the “Purchase Agreement”) with BofA Securities, Inc. as representative of the…

Regulation FD Disclosure. On March 12, 2026, Calumet, Inc. (the “Company”) announced that, subject to market conditions, its wholly owned subsidiaries, Calumet Specialty Products Partners, L.P. (the “Partnership”) and Calumet Finance Corp. (together with the Partnership, the “Issuers”), intend to offer $150.0 million in aggregate principal amount of the Issuers’ 9.75% Senior Notes due 2031 (the “Additional Notes”) in a private placement to eligible purchasers (the “Tack-on Offering”). In conn…

Results of Operations and Financial Condition. On February 27, 2026, Calumet, Inc. reported results of operations for the quarter and year ended December 31, 2025, pursuant to a press release. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K. In accordance with General Instruction B.2 of Form 8-K, the information contained in this report shall not be deemed “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 or otherwise subj…

Creation of a Direct Financial Obligation. The information set forth in

Entry into a Material Definitive Agreement. Ninth Amendment to Third Amended and Restated Credit Agreement On January 23, 2026, Calumet, Inc. (the “Company”) entered into the Ninth Amendment to the Third Amended and Restated Credit Agreement (the “Ninth Amendment”). The Ninth Amendment amended the Third Amended and Restated Credit Agreement, dated as of February 23, 2018 (the “Credit Agreement”), by and among Calumet GP, LLC, Calumet Specialty Products Partners, L.P., certain subsidiaries of…

Entry into a Material Definitive Agreement. On January 12, 2026, Calumet Specialty Products Partners, L.P. (the “Partnership”) and Calumet Finance Corp. (“Finance Corp.” and, together with the Partnership, the “Issuers”), each a subsidiary of Calumet, Inc. (the “Company”), issued $405.0 million aggregate principal amount of a new series of the Issuers’ 9.75% Senior Notes due 2031 (the “Notes”) in a private placement conducted pursuant to Rule 144A and Regulation S under the Securities Act of…

Creation of a Direct Financial Obligation. The information set forth in

Entry into a Material Definitive Agreement. On January 7, 2026, Calumet, Inc. (the “Company”), Calumet Specialty Products Partners, L.P. (the “Partnership”), Calumet Finance Corp. (“Finance Corp.” and, together with the Partnership, the “Issuers”), Calumet GP, LLC (the “General Partner”) and certain subsidiary guarantors named therein (the “Subsidiary Guarantors”) entered into a purchase agreement (the “Purchase Agreement”) with BofA Securities, Inc. as representative of the several initial p…

Results of Operations and Financial Condition. On January 5, 2026, Calumet, Inc. (the “Company”) issued a press release announcing preliminary unaudited information related to the Company’s liquidity and select fiscal year 2025 financial results. A copy of the press release is furnished as Exhibit 99.1 hereto and incorporated by reference herein. In accordance with General Instruction B.2 of Form 8-K, the information contained in this Item 2.02, including Exhibit 99.1, shall not be deemed “fi…

Regulation FD Disclosure. On January 6, 2026, Calumet, Inc. (the “Company”) announced that, subject to market conditions, its wholly owned subsidiaries, Calumet Specialty Products Partners, L.P. (the “Partnership”) and Calumet Finance Corp. (together with the Partnership, the “Issuers”), intend to offer $350.0 million in aggregate principal amount of senior unsecured notes due 2031 (the “Notes”) in a private placement to eligible purchasers (the “Offering”). In connection with the Offering, t…

Non-Reliance on Previously Issued Financial Statements or a Related Audit Report or Completed Interim Review. On November 3, 2025, the Audit Committee (the “Audit Committee”) of the Board of Directors of Calumet, Inc. (the “Company”) concluded, after consultation with the Company’s management, that the Company’s unaudited interim consolidated financial statements for the periods ended March 31, 2025 and June 30, 2025 (collectively, the “Non-Reliance Periods”) included in the Company’s Quarter…

Results of Operations and Financial Condition. The information set forth under

Results of Operations and Financial Condition. On November 7, 2025, Calumet, Inc. reported results of operations for the quarter ended September 30, 2025, pursuant to a press release. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K. In accordance with General Instruction B.2 of Form 8-K, the information contained in this report shall not be deemed “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to th…

Results of Operations and Financial Condition. On August 8, 2025, Calumet, Inc. reported results of operations for the quarter ended June 30, 2025, pursuant to a press release. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K. In accordance with General Instruction B.2 of Form 8-K, the information contained in this report shall not be deemed “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to the liabi…

Entry into a Material Definitive Agreement. Sale and Leaseback Transaction On July 25, 2025, Calumet Shreveport Refining, LLC (“Calumet Shreveport”), a subsidiary of Calumet, Inc. (the “Company”), entered into a Property Schedule No. 2 (“Property Schedule No. 2”) with Stonebriar Commercial Finance LLC (“Stonebriar”). Property Schedule No. 2 supplements the Master Lease Agreement, dated as of February 12, 2021 (the “Master Lease” and, together with Property Schedule No. 2, the “Lease Agreement…

Completion of Acquisition or Disposition of Assets. To the extent required, the information included in

Termination of a Material Definitive Agreement. The information included in

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information included in

Chief Accounting Officer and principal accounting officer — John R. Krutz: John R. Krutz was appointed as the Chief Accounting Officer and principal accounting officer, replacing David A. Lunin.