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…

Results of Operations and Financial Condition. On February 20, 2024 , Clearwater Paper Corporation (the “Company”) announced its results of operations for the fourth quarter and year ending December 31, 2023. 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 2023 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 October 30, 2023 , Clearwater Paper Corporation (the “Company”) announced its results of operations and financial condition for the third quarter ending September 30, 2023. 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…

Entry into a Material Definitive Agreement In connection with the discharge of its obligations under the Indenture (as defined below) and the redemption of the Notes (as defined below), on October 27, 2023 (the “Closing Date”), Clearwater Paper Corporation (the “Company”) entered into a credit agreement with AgWest Farm Credit, PCA, as administrative agent (the “Agent”), and the lenders party thereto (the “PCA Credit Agreement”). The credit facility provided under the PCA Credit Agreement con…

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

Termination of a Material Definitive Agreement On the Closing Date, the Company notified the holders of the Company’s existing 5.375% Senior Notes due 2025 (the “Notes”) that the Company elected to redeem all of the currently outstanding $270 million aggregate principal amount of Notes on November 27, 2023 (the “Redemption Date”), in accordance with that certain Indenture dated as of July 29, 2014 (the “Indenture”), by and among the Company, the guarantors party thereto and U.S. Bank National…

Chief Financial Officer — Sherri J. Baker: Sherri J. Baker was hired as the new Chief Financial Officer.