of Form 8-K and General Instruction B.2 thereunder. Such information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended. SECTION 2. FINANCIAL INFORMATION.

of Form 8-K and General Instruction B.2 thereunder. Such information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended. SECTION 2. FINANCIAL INFORMATION.

of Form 8-K and General Instruction B.2 thereunder. Such information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended. SECTION 2. FINANCIAL INFORMATION.

CEO — Jean-Michel Ribiéras: The CEO is retiring with a pre-announced, named internal successor (John V. Sims) already appointed as COO, indicating an orderly succession rather than a sudden loss of leadership.

Entry into a Material Definitive Agreement. On November 10, 2025, the board of directors (the “Board of Directors”) of Sylvamo Corporation (the “Company”) declared a dividend of one preferred share purchase right (a “Right”), payable on November 20, 2025, for each share of common stock, par value $1.00 per share, of the Company (the “Common Shares”) outstanding on November 20, 2025 (the “Record Date”) to the stockholders of record on that date. In connection with the distribution of the Right…

Material Modifications to Rights of Security Holders. The information set forth under Items 1.01 and 5.03 of this Current Report on Form 8-K is incorporated herein by reference.

of Form 8-K and General Instruction B.2 thereunder. Such information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended. SECTION 2. FINANCIAL INFORMATION.

Director — Karl Meyers and Mark Wilde: Two directors resigned as part of the termination of a strategic cooperation agreement, representing a planned structural change rather than a sudden executive loss.

Termination of a Material Definitive Agreement. The information set forth above in Item 1.01 “Entry into a Material Definitive Agreement” is incorporated herein by reference.

Entry into a Material Definitive Agreement Letter Agreement Regarding Riverdale Supply Agreement On October 27, 2025, Sylvamo North America, LLC (“ Sylvamo NA ”), a wholly-owned subsidiary of Sylvamo Corporation (the “ Company ”), and International Paper Company (“ IP ”) entered into a letter agreement effective as of October 1, 2025 (the “ Letter Agreement ”) that amends and sets forth certain other agreements regarding the Supply and Offtake Agreement (Riverdale) by and between IP and Sylva…

Director — Stan Askren: A director resigned for health reasons, which is a genuine departure but typically carries lower materiality than C-suite executive changes.

of Form 8-K and General Instruction B.2 thereunder. Such information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended. SECTION 2. FINANCIAL INFORMATION.

of Form 8-K and General Instruction B.2 thereunder. Such information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended. SECTION 2. FINANCIAL INFORMATION.

CEO — Jean-Michel Ribiéras: The CEO is retiring with a pre-announced, named internal successor (John V. Sims) already appointed to transition into the role, indicating an orderly succession rather than a sudden loss of leadership.

of Form 8-K and General Instruction B.2 thereunder. Such information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended. SECTION 2. FINANCIAL INFORMATION.

of Form 8-K and General Instruction B.2 thereunder. Such information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended. SECTION 2. FINANCIAL INFORMATION.

Termination of a Material Definitive Agreement. On October 30, 2024, Sylvamo North America, LLC (“ Sylvamo NA ”), a wholly-owned subsidiary of Sylvamo Corporation (the “ Company ”), and International Paper Company (“ IP ”) entered into an agreement (the “ Termination Agreement ”) to terminate the Supply and Offtake Agreement by and between IP and Sylvamo NA, dated as of September 30, 2021 (the “ Georgetown Supply Agreement ”). The effective date of termination is December 31, 2024. The Termin…

of Form 8-K and General Instruction B.2 thereunder. Such information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended. SECTION 2. FINANCIAL INFORMATION.

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

Entry into a Material Definitive Agreement. On July 31, 2024, Sylvamo Corporation (the “ Company ”) entered into certain material agreements described below, to refinance its long-term debt. The Company took advantage of a favorable financing market to extend its debt maturity profile, making the following primary changes: • Revolving Credit Facility . Extended the maturity of the existing revolving credit facility from 2026 to 2029 and reduced the borrowing capacity from $450 million to $400…

of Form 8-K and General Instruction B.2 thereunder. Such information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended. SECTION 2. FINANCIAL INFORMATION.