Clearwater Paper(CLW) - 2025 Q1 - Quarterly Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ý Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 CLEARWATER PAPER CORPORATION (Exact name of registrant as specified in its charter) Delaware 20-3594554 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification No.) For the quarterly period ended March 31, 2025 or ¨ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchan ...