UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d)

of The Securities Exchange Act of 1934

Date of Report (date of earliest event reported): August 21, 2025

SYLVAMO CORPORATION

(Exact name of registrant as specified in its charter)

Commission file number 001-40718

Delaware

86-2596371

(State or other jurisdiction

of incorporation)

(I.R.S. Employer

Identification No.)


6077 Primacy Parkway, Memphis, Tennessee		38119
(Address of Principal Executive Offices)		(Zip Code)

Registrant’s telephone number, including area code: (901) 519-8000

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:


Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, $1 per share par value	SLVM	New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

The information in this Report, including the exhibit, is being furnished pursuant to Item 7.01 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.

Item 7.01

Regulation FD Disclosure.

On August 21, 2025, Sylvamo Corporation (the “Company”) issued a press release relating to the announced plan of International Paper Company (“IP”) to convert paper machine no. 16 at its Riverdale Mill to the production of containerboard by the third quarter of 2026. The Riverdale Mill supplies from machine no. 16 certain products to the Company, which the Company sells to its customers (the “Products”). As a result of the conversion, the Riverdale Mill will cease supplying the Products. The Products are supplied pursuant to a Supply and Offtake Agreement, dated as of September 30, 2021 (the “Supply Agreement”), by and between IP and Sylvamo North America LLC, a wholly-owned subsidiary of the Company. The Supply Agreement has not been terminated. A copy of the press release is attached as Exhibit 99.1 and incorporated herein by reference.

Item 9.01

Financial Statements and Exhibits.


Exhibit Number		Description

99.1		Press Release dated August 21, 2025

104		Cover Page Interactive Data File (embedded within the Inline XBRL document)

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: August 21, 2025

Sylvamo Corporation

/s/ Matthew Barron

Matthew Barron

Senior Vice President and Chief Administrative and Legal Officer

Sylvamo Corp 8-K