SLVM

EX-99.1

2 sylvamoex9912026firstquart.htm

EX-99.1

Document

Exhibit 99.1

NEWS RELEASE

Sylvamo Releases First Quarter Earnings

MEMPHIS, Tenn. – May 8, 2026 – Sylvamo (NYSE: SLVM), the world’s paper company, is releasing first quarter earnings. The company will host an audio webcast at 10 a.m. EDT at investors.sylvamo.com.

Management Summary from Chief Executive Officer John Sims

2026 continues to be a transition year as we work through some short-term capacity constraints due to the termination of the Riverdale supply agreement at the end of April and an upcoming extended outage at our Eastover, South Carolina, mill as we execute our strategic investments.

Our high-return strategic investments at Eastover are on track. The paper machine optimization project is scheduled for completion during a planned maintenance outage in the fourth quarter. The new cutsize sheeter is also on schedule and will be installed in the third quarter, ramping up in the fourth quarter. The hardwood line of the woodyard modernization project is running and already showing improved chip quality, and we expect to see improved yield moving forward. The softwood operation is expected to start up in the first quarter of 2027.

To serve our most valuable customers in the U.S. during this transition, we started importing from our mills in Europe, converting product using third-party vendors and building inventory. This resulted in lower sales volume and incremental costs in the first quarter. Changes in U.S. global tariff rates in late February prompted us to revise our plans and begin bringing product in from our operations in Brazil while ramping down imports from our Europe operations. We expect this to benefit Sylvamo by reducing the 2026 North America footprint transition costs by approximately $20 million at current tariff rates.

The first quarter played out largely as we anticipated with the exception of some reliability issues in Europe and Latin America. The root causes have mostly been corrected or will be during the upcoming annual outages. In the first quarter, we began implementing previously communicated uncoated freesheet paper price increases to customers across all our regions. We started to see the benefits of these increases in the first quarter in North America and Latin America and will continue to see realization of these increases across all regions into the second quarter.

Sylvamo generated a net loss of $3 million and adjusted EBITDA* of $29 million, representing a 4% margin. Cash used for operating activities was $10 million, and free cash flow* was negative $59 million.

As anticipated, free cash flow was lower than the fourth quarter, due to lower earnings, unfavorable impacts of our inventory build, the timing of payments and the payment of annual incentive compensation in the first quarter. These were partially offset by favorable cash collections related to Latin America’s seasonally higher fourth quarter sales.

Our free cash flow is heavily weighted to the second half of the year. In the last few years, we generated the vast majority of our free cash flow in the second half, and we expect to do so again this year.

-Capital Allocation

Our board of directors declared a $0.45 dividend for the second quarter, which we paid April 28.

We refinanced debt due in 2027 to extend our maturity profile, which allows us to navigate the current uncertain environment without changing our long-term approach to capital allocation.

Our capital allocation philosophy has not changed. We will deploy every dollar with the goal of improving our competitive position and delivering the best possible shareowner returns over time. We plan to maintain a strong financial position, reinvest in our business and return cash to shareowners.

*See “Non-GAAP Financial Measures” for definitions of non-GAAP financial measures. Reconciliations are included in the financial schedules below.

1

Exhibit 99.1

-Regional Business Conditions

•In Europe, industry supply and demand remain challenging. Pulp prices improved throughout the first quarter, and we are realizing previously communicated paper price increases in April. We have communicated a second paper price increase effective in May and expect the realization to occur through the second and third quarters.

•In Latin America, we moved from the seasonally strongest demand in the fourth quarter to the seasonally weakest in the first quarter, but now expect demand to increase each quarter this year. We are realizing the previously communicated paper price increases to our customers in Brazil, export customers across other Latin American countries as well as customers in the Middle East and Africa. We have communicated a second paper price increase effective in April to our customers across other Latin American countries as well as customers in the Middle East and Africa. We should continue to see additional realization in these regions through the second quarter.

•In North America

syl-202602120001856485FALSE00018564852026-02-122026-02-120001856485us-gaap:CommonStockMember2026-02-122026-02-120001856485us-gaap:PreferredStockMember2026-02-122026-02-12

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): February 12, 2026

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 classTrading Symbol(s)Name of each exchange on which registered Common Stock, $1 per share par valueSLVMNew York Stock Exchange Preferred Stock Purchase RightsSLVMNew 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. ☐ 1

EXPLANATORY NOTE

The information in this Report, including the exhibit, is being furnished pursuant to Item 2.02 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.

Item 2.02.   Results of Operations and Financial Condition. On February 12, 2026, Sylvamo Corporation issued a press release announcing its financial results for the fiscal quarter ended December 31, 2025. Attached as Exhibit 99.1 and incorporated herein by reference is a copy of the press release.

SECTION 9. FINANCIAL STATEMENTS AND EXHIBITS.

Item 9.01.   Financial Statements and Exhibits. (d) Exhibits.

Exhibit Number Description

99.1Press Release of Sylvamo Corporation dated February 12, 2026.

101Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document. 104The cover page from this Current Report on Form 8-K, formatted as Inline XBRL.

2

SIGNATURES

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.

Sylvamo Corporation

Date: February 12, 2026/s/ Matthew L. Barron Name:Matthew L. Barron Title:Senior Vice President and Chief Administrative and Legal Officer

3

syl-202511070001856485FALSE00018564852025-11-072025-11-07

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): November 7, 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 classTrading Symbol(s)Name of each exchange on which registered Common Stock, $1 per share par valueSLVMNew 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. ☐ 1

EXPLANATORY NOTE

The information in this Report, including the exhibit, is being furnished pursuant to Item 2.02 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.

Item 2.02.   Results of Operations and Financial Condition. On November 7, 2025, Sylvamo Corporation issued a press release announcing its financial results for the fiscal quarter ended September 30, 2025. Attached as Exhibit 99.1 and incorporated herein by reference is a copy of the press release.

SECTION 9. FINANCIAL STATEMENTS AND EXHIBITS.

Item 9.01.   Financial Statements and Exhibits. (d) Exhibits.

Exhibit Number Description

99.1Press Release of Sylvamo Corporation dated November 7, 2025.

101Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document. 104The cover page from this Current Report on Form 8-K, formatted as Inline XBRL.

2

SIGNATURES

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.

Sylvamo Corporation

Date: November 7, 2025/s/ Matthew L. Barron Name:Matthew L. Barron Title:Senior Vice President and Chief Administrative and Legal Officer

3

syl-202508080001856485FALSE00018564852025-08-082025-08-08

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 8, 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 classTrading Symbol(s)Name of each exchange on which registered Common Stock, $1 per share par valueSLVMNew 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. ☐ 1

EXPLANATORY NOTE

The information in this Report, including the exhibit, is being furnished pursuant to Item 2.02 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.

Item 2.02.   Results of Operations and Financial Condition. On August 8, 2025, Sylvamo Corporation issued a press release announcing its financial results for the fiscal quarter ended June 30, 2025. Attached as Exhibit 99.1 and incorporated herein by reference is a copy of the press release.

SECTION 9. FINANCIAL STATEMENTS AND EXHIBITS.

Item 9.01.   Financial Statements and Exhibits. (d) Exhibits.

Exhibit Number Description

99.1Press Release of Sylvamo Corporation dated August 8, 2025.

101Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document. 104The cover page from this Current Report on Form 8-K, formatted as Inline XBRL.

2

SIGNATURES

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.

Sylvamo Corporation

Date: August 8, 2025/s/ Matthew L. Barron Name:Matthew L. Barron Title:Senior Vice President and Chief Administrative and Legal Officer

3

syl-202505090001856485FALSE00018564852025-05-092025-05-09

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): May 9, 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 classTrading Symbol(s)Name of each exchange on which registered Common Stock, $1 per share par valueSLVMNew 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. ☐ 1

EXPLANATORY NOTE

The information in this Report, including the exhibit, is being furnished pursuant to Item 2.02 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.

Item 2.02.   Results of Operations and Financial Condition. On May 9, 2025, Sylvamo Corporation issued a press release announcing its financial results for the fiscal quarter ended March 31, 2025. Attached as Exhibit 99.1 and incorporated herein by reference is a copy of the press release.

SECTION 9. FINANCIAL STATEMENTS AND EXHIBITS.

Item 9.01.   Financial Statements and Exhibits. (d) Exhibits.

Exhibit Number Description

99.1Press Release of Sylvamo Corporation dated May 9, 2025.

101Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document. 104The cover page from this Current Report on Form 8-K, formatted as Inline XBRL.

2

SIGNATURES

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.

Sylvamo Corporation

Date: May 9, 2025/s/ Matthew L. Barron Name:Matthew L. Barron Title:Senior Vice President and Chief Administrative and Legal Officer

3

syl-202502120001856485FALSE00018564852025-02-122025-02-12

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): February 12, 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 classTrading Symbol(s)Name of each exchange on which registered Common Stock, $1 per share par valueSLVMNew 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. ☐ 1

EXPLANATORY NOTE

The information in this Report, including the exhibit, is being furnished pursuant to Item 2.02 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.

Item 2.02.   Results of Operations and Financial Condition. On February 12, 2025, Sylvamo Corporation issued a press release announcing its financial results for the fiscal quarter ended December 31, 2024. Attached as Exhibit 99.1 and incorporated herein by reference is a copy of the press release.

SECTION 9. FINANCIAL STATEMENTS AND EXHIBITS.

Item 9.01.   Financial Statements and Exhibits. (d) Exhibits.

Exhibit Number Description

99.1Press Release of Sylvamo Corporation dated February 12, 2025.

101Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document. 104The cover page from this Current Report on Form 8-K, formatted as Inline XBRL.

2

SIGNATURES

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.

Sylvamo Corporation

Date: February 12, 2025/s/ Matthew L. Barron Name:Matthew L. Barron Title:Senior Vice President and Chief Administrative and Legal Officer

3

syl-202411120001856485FALSE00018564852024-11-122024-11-12

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): November 12, 2024

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 classTrading Symbol(s)Name of each exchange on which registered Common Stock, $1 per share par valueSLVMNew 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. ☐ 1

EXPLANATORY NOTE

The information in this Report, including the exhibit, is being furnished pursuant to Item 2.02 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.

Item 2.02.   Results of Operations and Financial Condition. On November 12, 2024, Sylvamo Corporation issued a press release announcing its financial results for the fiscal quarter ended September 30, 2024. Attached as Exhibit 99.1 and incorporated herein by reference is a copy of the press release.

SECTION 9. FINANCIAL STATEMENTS AND EXHIBITS.

Item 9.01.   Financial Statements and Exhibits. (d) Exhibits.

Exhibit Number Description

99.1Press Release of Sylvamo Corporation dated November 12, 2024.

101Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document. 104The cover page from this Current Report on Form 8-K, formatted as Inline XBRL.

2

SIGNATURES

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.

Sylvamo Corporation

Date: November 12, 2024/s/ Matthew L. Barron Name:Matthew L. Barron Title:Senior Vice President and Chief Administrative and Legal Officer

3

syl-202408090001856485FALSE00018564852024-08-092024-08-09

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 9, 2024

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 classTrading Symbol(s)Name of each exchange on which registered Common Stock, $1 per share par valueSLVMNew 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. ☐ 1

EXPLANATORY NOTE

The information in this Report, including the exhibit, is being furnished pursuant to Item 2.02 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.

Item 2.02.   Results of Operations and Financial Condition. On August 9, 2024, Sylvamo Corporation issued a press release announcing its financial results for the fiscal quarter ended June 30, 2024. Attached as Exhibit 99.1 and incorporated herein by reference is a copy of the press release.

SECTION 9. FINANCIAL STATEMENTS AND EXHIBITS.

Item 9.01.   Financial Statements and Exhibits. (d) Exhibits.

Exhibit Number Description

99.1Press Release of Sylvamo Corporation dated August 9, 2024.

101Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document. 104The cover page from this Current Report on Form 8-K, formatted as Inline XBRL.

2

SIGNATURES

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.

Sylvamo Corporation

Date: August 9, 2024/s/ Matthew L. Barron Name:Matthew L. Barron Title:Senior Vice President and Chief Administrative and Legal Officer

3

syl-202405100001856485FALSE00018564852024-05-102024-05-10

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): May 10, 2024

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 classTrading Symbol(s)Name of each exchange on which registered Common Stock, $1 per share par valueSLVMNew 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. ☐ 1

EXPLANATORY NOTE

The information in this Report, including the exhibit, is being furnished pursuant to Item 2.02 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.

Item 2.02.   Results of Operations and Financial Condition. On May 10, 2024, Sylvamo Corporation issued a press release announcing its financial results for the fiscal quarter ended March 31, 2024. Attached as Exhibit 99.1 and incorporated herein by reference is a copy of the press release.

SECTION 9. FINANCIAL STATEMENTS AND EXHIBITS.

Item 9.01.   Financial Statements and Exhibits. (d) Exhibits.

Exhibit Number Description

99.1Press Release of Sylvamo Corporation dated May 10, 2024.

101Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document. 104The cover page from this Current Report on Form 8-K, formatted as Inline XBRL.

2

SIGNATURES

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.

Sylvamo Corporation

Date: May 10, 2024/s/ Matthew L. Barron Name:Matthew L. Barron Title:Senior Vice President and Chief Administrative and Legal Officer

3

syl-202402150001856485FALSE00018564852024-02-152024-02-15

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): February 15, 2024

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 classTrading Symbol(s)Name of each exchange on which registered Common Stock, $1 per share par valueSLVMNew 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. ☐ 1

EXPLANATORY NOTE

The information in this Report, including the exhibit, is being furnished pursuant to Item 2.02 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.

Item 2.02.   Results of Operations and Financial Condition. On February 15, 2024, Sylvamo Corporation issued a press release announcing its financial results for the fiscal quarter ended December 31, 2023. Attached as Exhibit 99.1 and incorporated herein by reference is a copy of the press release.

SECTION 9. FINANCIAL STATEMENTS AND EXHIBITS.

Item 9.01.   Financial Statements and Exhibits. (d) Exhibits.

Exhibit Number Description

99.1Press Release of Sylvamo Corporation dated February 15, 2024.

101Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document. 104The cover page from this Current Report on Form 8-K, formatted as Inline XBRL.

2

SIGNATURES

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.

Sylvamo Corporation

Date: February 15, 2024/s/ Matthew L. Barron Name:Matthew L. Barron Title:Senior Vice President and General Counsel

3

syl-202311090001856485FALSE00018564852023-11-092023-11-09

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): November 9, 2023

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 classTrading Symbol(s)Name of each exchange on which registered Common Stock, $1 per share par valueSLVMNew 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. ☐ 1

EXPLANATORY NOTE

The information in this Report, including the exhibit, is being furnished pursuant to Item 2.02 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.

Item 2.02.   Results of Operations and Financial Condition. On November 9, 2023, Sylvamo Corporation issued a press release announcing its financial results for the fiscal quarter ended September 30, 2023. Attached as Exhibit 99.1 and incorporated herein by reference is a copy of the press release.

SECTION 9. FINANCIAL STATEMENTS AND EXHIBITS.

Item 9.01.   Financial Statements and Exhibits. (d) Exhibits.

Exhibit Number Description

99.1Press Release of Sylvamo Corporation dated November 9, 2023.

101Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document. 104The cover page from this Current Report on Form 8-K, formatted as Inline XBRL.

2

SIGNATURES

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.

Sylvamo Corporation

Date: November 9, 2023/s/ Matthew L. Barron Name:Matthew L. Barron Title:Senior Vice President and General Counsel

3

syl-202308090001856485FALSE00018564852023-08-092023-08-09

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 9, 2023

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 classTrading Symbol(s)Name of each exchange on which registered Common Stock, $1 per share par valueSLVMNew 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. ☐ 1

EXPLANATORY NOTE

The information in this Report, including the exhibit, is being furnished pursuant to Item 2.02 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.

Item 2.02.   Results of Operations and Financial Condition. On August 9, 2023, Sylvamo Corporation issued a press release announcing its financial results for the fiscal quarter ended June 30, 2023. Attached as Exhibit 99.1 and incorporated herein by reference is a copy of the press release.

SECTION 9. FINANCIAL STATEMENTS AND EXHIBITS.

Item 9.01.   Financial Statements and Exhibits. (d) Exhibits.

Exhibit Number Description

99.1Press Release of Sylvamo Corporation dated August 9, 2023.

101Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document. 104The cover page from this Current Report on Form 8-K, formatted as Inline XBRL.

2

SIGNATURES

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.

Sylvamo Corporation

Date: August 9, 2023/s/ Matthew L. Barron Name:Matthew L. Barron Title:Senior Vice President and General Counsel

3

syl-202305090001856485FALSE00018564852023-05-092023-05-09

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): May 9, 2023

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 classTrading Symbol(s)Name of each exchange on which registered Common Stock, $1 per share par valueSLVMNew 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. ☐ 1

EXPLANATORY NOTE

The information in this Report, including the exhibit, is being furnished pursuant to Item 2.02 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.

Item 2.02.   Results of Operations and Financial Condition. On May 9, 2023, Sylvamo Corporation issued a press release announcing its financial results for the fiscal quarter ended March 31, 2023. Attached as Exhibit 99.1 and incorporated herein by reference is a copy of the press release.

SECTION 9. FINANCIAL STATEMENTS AND EXHIBITS.

Item 9.01.   Financial Statements and Exhibits. (d) Exhibits.

Exhibit Number Description

99.1Press Release of Sylvamo Corporation dated May 9, 2023.

101Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document. 104The cover page from this Current Report on Form 8-K, formatted as Inline XBRL.

2

SIGNATURES

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.

Sylvamo Corporation

Date: May 9, 2023/s/ Matthew L. Barron Name:Matthew L. Barron Title:Senior Vice President and General Counsel

3

syl-202302100001856485FALSETRUE00018564852023-02-102023-02-100001856485us-gaap:CommonStockMember2023-02-102023-02-100001856485us-gaap:PreferredStockMember2023-02-102023-02-10

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): February 10, 2023

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 classTrading Symbol(s)Name of each exchange on which registered Common Stock, $1 per share par valueSLVMNew York Stock Exchange Preferred Stock Purchase Rights-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. ☐ 1

EXPLANATORY NOTE

The information in this Report, including the exhibit, is being furnished pursuant to Item 2.02 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.

Item 2.02.   Results of Operations and Financial Condition. On February 10, 2023, Sylvamo Corporation issued a press release announcing its financial results for the fiscal quarter ended December 31, 2022. Attached as Exhibit 99.1 and incorporated herein by reference is a copy of the press release.

SECTION 9. FINANCIAL STATEMENTS AND EXHIBITS.

Item 9.01.   Financial Statements and Exhibits. (d) Exhibits.

Exhibit Number Description

99.1Press Release of Sylvamo Corporation dated February 10, 2023.

101Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document. 104The cover page from this Current Report on Form 8-K, formatted as Inline XBRL.

2

SIGNATURES

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.

Sylvamo Corporation

Date: February 10, 2023/s/ Matthew L. Barron Name:Matthew L. Barron Title:Senior Vice President and General Counsel

3

syl-202211100001856485FALSETRUE00018564852022-11-102022-11-100001856485us-gaap:CommonStockMember2022-11-102022-11-100001856485us-gaap:PreferredStockMember2022-11-102022-11-10

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): November 10, 2022

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 classTrading Symbol(s)Name of each exchange on which registered Common Stock, $1 per share par valueSLVMNew York Stock Exchange Preferred Stock Purchase Rights-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. ☐ 1

EXPLANATORY NOTE

The information in this Report, including the exhibit, is being furnished pursuant to Item 2.02 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.

Item 2.02.   Results of Operations and Financial Condition. On November 10, 2022, Sylvamo Corporation issued a press release announcing its financial results for the fiscal quarter ended September 30, 2022. Attached as Exhibit 99.1 and incorporated herein by reference is a copy of the press release.

SECTION 9. FINANCIAL STATEMENTS AND EXHIBITS.

Item 9.01.   Financial Statements and Exhibits. (d) Exhibits.

Exhibit Number Description

99.1Press Release of Sylvamo Corporation dated November 10, 2022.

101Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document. 104The cover page from this Current Report on Form 8-K, formatted as Inline XBRL.

2

SIGNATURES

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.

Sylvamo Corporation

Date: November 10, 2022/s/ Matthew L. Barron Name:Matthew L. Barron Title:Senior Vice President and General Counsel

3

syl-202208110001856485FALSE00018564852022-08-112022-08-110001856485us-gaap:CommonStockMember2022-08-112022-08-110001856485us-gaap:PreferredStockMember2022-08-112022-08-11

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 11, 2022

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.)

6400 Poplar Avenue, Memphis, Tennessee 38197

(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 classTrading Symbol(s)Name of each exchange on which registered Common Stock, $1 per share par valueSLVMNew York Stock Exchange Preferred Stock Purchase RightsSLVMNew 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. ☐ 1

EXPLANATORY NOTE

The information in this Report, including the exhibit, is being furnished pursuant to Item 2.02 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.

Item 2.02.   Results of Operations and Financial Condition. On August 11, 2022, Sylvamo Corporation (the “Company”) issued a press release announcing its financial results for the fiscal quarter ended June 30, 2022. Attached as Exhibit 99.1 and incorporated herein by reference is a copy of the press release.

SECTION 9. FINANCIAL STATEMENTS AND EXHIBITS.

Item 9.01.   Financial Statements and Exhibits. (d) Exhibits.

Exhibit Number Description

99.1Press Release of Sylvamo Corporation dated August 11, 2022.

101Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document. 104The cover page from this Current Report on Form 8-K, formatted as Inline XBRL.

2

SIGNATURES

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.

Sylvamo Corporation

Date: August 11, 2022 Name:Matthew L. Barron Title:Senior Vice President and General Counsel

3

syl-202205110001856485FALSE00018564852022-05-112022-05-11

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): May 11, 2022

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.)

6400 Poplar Avenue, Memphis, Tennessee 38197

(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 classTrading Symbol(s)Name of each exchange on which registered Common Stock, $1 per share par valueSLVMNew 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. ☐ 1

EXPLANATORY NOTE

The information in this Report, including the exhibit, is being furnished pursuant to Item 2.02 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.

Item 2.02.   Results of Operations and Financial Condition. On May 11, 2022, Sylvamo Corporation (the “Company”) issued a press release announcing its financial results for the fiscal quarter ended March 31, 2022. Attached as Exhibit 99.1 and incorporated herein by reference is a copy of the press release.

SECTION 9. FINANCIAL STATEMENTS AND EXHIBITS.

Item 9.01.   Financial Statements and Exhibits. (d) Exhibits.

Exhibit Number Description

99.1Press Release of Sylvamo Corporation dated May 11, 2022.

101Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document. 104The cover page from this Current Report on Form 8-K, formatted as Inline XBRL.

2

SIGNATURES

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.

Sylvamo Corporation

Date: May 11, 2022/s/ Matthew L. Barron Name:Matthew L. Barron Title:Senior Vice President and General Counsel

3

syl-202202110001856485FALSE00018564852022-02-112022-02-11

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): February 11, 2022

SYLVAMO CORPORATION

(Exact name of registrant as specified in its charter) Commission file number 1-3157

Delaware 86-2596371 (State or other jurisdiction of incorporation) (I.R.S. Employer Identification No.)

6400 Poplar Avenue, Memphis, Tennessee 38197

(Address of Principal Executive Offices) (Zip Code)

Registrant's telephone number, including area code: (901) 419-9000 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 classTrading Symbol(s)Name of each exchange on which registered Common Stock, $1 per share par valueSLVMNew 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. ☐ 1

EXPLANATORY NOTE

The information in this Report, including the exhibit, is being furnished pursuant to Item 2.02 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.

Item 2.02.   Results of Operations and Financial Condition. On February 11, 2021, Sylvamo Corporation (the “Company”) issued a press release announcing its financial results for the fiscal quarter ended December 31, 2021. Attached as Exhibit 99.1 and incorporated herein by reference is a copy of the press release.

SECTION 9. FINANCIAL STATEMENTS AND EXHIBITS.

Item 9.01.   Financial Statements and Exhibits. (d) Exhibits.

Exhibit Number Description

99.1Press Release of Sylvamo Corporation dated February 11, 2021.

101Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document. 104The cover page from this Current Report on Form 8-K, formatted as Inline XBRL.

2

SIGNATURES

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.

Sylvamo Corporation

Date: February 11, 2021/s/ Matthew L. Barron Name:Matthew L. Barron Title:Senior Vice President and General Counsel

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syl-202111100001856485FALSE00018564852021-11-102021-11-10

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): November 10, 2021

SYLVAMO CORPORATION

(Exact name of registrant as specified in its charter) Commission file number 1-3157

Delaware 86-2596371 (State or other jurisdiction of incorporation) (I.R.S. Employer Identification No.)

6400 Poplar Avenue, Memphis, Tennessee 38197

(Address of Principal Executive Offices) (Zip Code)

Registrant's telephone number, including area code: (901) 419-9000 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 classTrading Symbol(s)Name of each exchange on which registered Common Stock, $1 per share par valueSLVMNew 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. ☐ 1

EXPLANATORY NOTE

The information in this Report, including the exhibit, is being furnished pursuant to Item 2.02 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.

Item 2.02.   Results of Operations and Financial Condition. On November 10, 2021, Sylvamo Corporation (the “Company”) issued a press release announcing its financial results for the fiscal quarter ended September 30, 2021. Attached as Exhibit 99.1 and incorporated herein by reference is a copy of the press release.

SECTION 9. FINANCIAL STATEMENTS AND EXHIBITS.

Item 9.01.   Financial Statements and Exhibits. (d) Exhibits.

Exhibit Number Description

99.1Press Release of Sylvamo Corporation dated November 10, 2021.

101Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document. 104The cover page from this Current Report on Form 8-K, formatted as Inline XBRL.

2

SIGNATURES

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.

Sylvamo Corporation

Date: November 10, 2021By:/s/ Matthew L. Barron Name:Matthew L. Barron Title:Senior Vice President and General Counsel

3