FORM 10-Q ________________ ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 WASHINGTON, D.C. 20549 ________________ For the Quarterly Period Ended March 31, 2026 UNITED STATES SECURITIES AND EXCHANGE COMMISSION ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period From to ______________________________ Commission File Number 001-40718 ________________ SYLVAMO CORPORATION (Exact Name of Registrant as Speci ...