CFO — Sherri Baker: The resignation of the Chief Financial Officer is a significant loss of a senior executive, and no successor is named in the excerpt.

Results of Operations and Financial Condition. On October 26, 2026, Clearwater Paper Corporation (the “Company”) announced its results of operations and financial condition for the third quarter ending September 30, 2026. A copy of the press release containing this announcement is furnished as Exhibit 99.1 hereto. In addition, a copy of the Company’s Third Quarter Supplemental Information is furnished as Exhibit 99.2 hereto. In addition to disclosing financial results calculated in accordance…

Entry into a Material Definitive Agreement. On September 18, 2026 (the “Refinancing Date”), Clearwater Paper Corporation (the “Company”) entered into a Second Amended and Restated Credit Agreement by and among the Company, AgWest Farm Credit, PCA, as administrative agent (the “Agent”), and the lenders party thereto (the “Credit Agreement”). The credit facilities provided under the Credit Agreement that are summarized below replace both the (i) term revolver facility previously provided under…

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

Termination of a Material Definitive Agreement. Redemption of 4.750% Senior Notes due 2028 and Satisfaction and Discharge of Indenture On September 18, 2026, the Company notified the holders of the Company’s existing 4.750% Senior Notes due 2028 (the “2028 Notes”) of the Company’s election to redeem in full the currently outstanding $275 million aggregate principal amount of 2028 Notes on October 3, 2026 (the “Redemption Date”), in accordance with that certain Indenture dated as of August 18,…

Regulation FD Disclosure. On September 21, 2026, the Company issued a press release related to the foregoing, a copy of which is furnished as Exhibit 99.1 to this Current Report on Form 8-K. The information in this Item 7.01, including Exhibit 99.1, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exc…

Results of Operations and Financial Condition. On July 28, 2026, Clearwater Paper Corporation (the “Company”) announced its results of operations and financial condition for the second quarter ending June 30, 2026. A copy of the press release containing this announcement is furnished as Exhibit 99.1 hereto. In addition, a copy of the Company’s Second Quarter Supplemental Information is furnished as Exhibit 99.2 hereto. In addition to disclosing financial results calculated in accordance with…

Approval of equity and incentive plans.

Results of Operations and Financial Condition. On April 28, 2026, Clearwater Paper Corporation (the “Company”) announced its results of operations and financial condition for the first quarter ending March 31, 2026. A copy of the press release containing this announcement is furnished as Exhibit 99.1 hereto. In addition, a copy of the Company’s First Quarter Supplemental Information is furnished as Exhibit 99.2 hereto. In addition to disclosing financial results calculated in accordance with…

Results of Operations and Financial Condition. On February 18, 2026 , Clearwater Paper Corporation (the “Company”) announced its results of operations for the fourth quarter and year ending December 31, 2025. A copy of the press release containing this announcement is furnished as Exhibit 99.1 hereto. In addition, a copy of the Company’s Fourth Quarter 2025 Earnings Release Materials is furnished as Exhibit 99.2 hereto. In addition to disclosing financial results calculated in accordance with…

Senior Vice President, Commercial — Steve Bowden: Steve Bowden is being internally promoted to a new role.

Results of Operations and Financial Condition. On October 28, 2025, Clearwater Paper Corporation (the “Company”) announced its results of operations and financial condition for the third quarter ending September 30, 2025. A copy of the press release containing this announcement is furnished as Exhibit 99.1 hereto. In addition, a copy of the Company’s Third Quarter Supplemental Information is furnished as Exhibit 99.2 hereto. In addition to disclosing financial results calculated in accordance…

Results of Operations and Financial Condition. On July 29, 2025 , Clearwater Paper Corporation (the “Company”) announced its results of operations and financial condition for the second quarter ending June 30, 2025. A copy of the press release containing this announcement is furnished as Exhibit 99.1 hereto. In addition, a copy of the Company’s Second Quarter Supplemental Information is furnished as Exhibit 99.2 hereto. In addition to disclosing financial results calculated in accordance with…

Senior Vice President, Commercial — Michael Urlick: Mr. Urlick resigned to pursue a new opportunity.

Senior Vice President, General Counsel — Marc D. Rome: Michael S. Gadd is stepping down as General Counsel and Marc D. Rome is being promoted to the role.

Results of Operations and Financial Condition. On April 29, 2025 , Clearwater Paper Corporation (the “Company”) announced its results of operations and financial condition for the first quarter ending March 31, 2025. A copy of the press release containing this announcement is furnished as Exhibit 99.1 hereto. In addition, a copy of the Company’s First Quarter Supplemental Information is furnished as Exhibit 99.2 hereto. In addition to disclosing financial results calculated in accordance with…

President and Chief Executive Officer — Arsen S. Kitch: Mr. Kitch's existing role and responsibilities were renewed with a new employment agreement.

Results of Operations and Financial Condition. On February 13, 2025 , Clearwater Paper Corporation (the “Company”) announced its results of operations for the fourth quarter and year ending December 31, 2024. A copy of the press release containing this announcement is furnished as Exhibit 99.1 hereto. In addition, a copy of the Company’s Fourth Quarter 2024 Earnings Release Materials is furnished as Exhibit 99.2 hereto. In addition to disclosing financial results calculated in accordance with…

Results of Operations and Financial Condition. On November 4, 2024 , Clearwater Paper Corporation (the “Company”) announced its results of operations and financial condition for the third quarter ending September 30, 2024. A copy of the press release containing this announcement is furnished as Exhibit 99.1 hereto. In addition, a copy of the Company’s Third Quarter Supplemental Information is furnished as Exhibit 99.2 hereto. In addition to disclosing financial results calculated in accordanc…

Senior Vice President, Operations — Steve Bowden: The changes are part of a reorganization following the sale of the consumer products division.

Results of Operations and Financial Condition. On August 6, 2024 , Clearwater Paper Corporation (the “Company”) announced its results of operations and financial condition for the second quarter ending June 30, 2024. A copy of the press release containing this announcement is furnished as Exhibit 99.1 hereto. In addition, a copy of the Company’s Second Quarter Supplemental Information is furnished as Exhibit 99.2 hereto. In addition to disclosing financial results calculated in accordance wit…

Entry into a Material Definitive Agreement Membership Interest Purchase Agreement and Asset Purchase Agreement On July 21, 2024, Clearwater Paper Corporation (the “Company”) and Sofidel America Corp. (“Sofidel”), a wholly owned subsidiary of Sofidel S.p.A. (“Buyer Parent”), entered into (i) a Membership Interest Purchase Agreement (the “MIPA”) and (ii) an Asset Purchase Agreement (the “APA” and, together with the MIPA, the “Purchase Agreements”), pursuant to which, among other things, Sofidel…

Results of Operations and Financial Condition. On April 29, 2024 , Clearwater Paper Corporation (the “Company”) announced its results of operations and financial condition for the first quarter ending March 31, 2024. A copy of the press release containing this announcement is furnished as Exhibit 99.1 hereto. In addition, a copy of the Company’s First Quarter Supplemental Information is furnished as Exhibit 99.2 hereto. In addition to disclosing financial results calculated in accordance with…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement. The description set forth under

Entry into a Material Definitive Agreement Asset Purchase Agreement On February 20, 2024, Clearwater Paper Corporation (the “Company”) and Graphic Packaging International, LLC (“GPK”), a wholly owned subsidiary of Graphic Packaging Holding Company, entered into an Asset Purchase Agreement (the “Purchase Agreement”), pursuant to which, among other things, the Company will acquire certain assets (the “Transferred Assets”) of GPK’s consumer packaging business operating out of GPK’s paperboard mi…