# EDGAR Filing Document

**Accession Number:** 0001856485
**File Stem:** 0001193125-25-268240
**Filing Date:** 2025-11
**Character Count:** 32479
**Document Hash:** 16bb54b132411946df168a803fe0c315
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-268240.hdr.sgml**: 20251106

**ACCESSION NUMBER**: 0001193125-25-268240

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20251106

**DATE AS OF CHANGE**: 20251106

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Sylvamo Corp
- **CENTRAL INDEX KEY:** 0001856485
- **STANDARD INDUSTRIAL CLASSIFICATION:** PAPER MILLS [2621]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 862596371
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-92982
- **FILM NUMBER:** 251456464

**BUSINESS ADDRESS:**
- **STREET 1:** 6077 PRIMACY PARKWAY
- **CITY:** MEMPHIS
- **STATE:** TN
- **ZIP:** 38119
- **BUSINESS PHONE:** 901-519-8000

**MAIL ADDRESS:**
- **STREET 1:** 6077 PRIMACY PARKWAY
- **CITY:** MEMPHIS
- **STATE:** TN
- **ZIP:** 38119
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** ACR Group Paper Holdings LP
- **CENTRAL INDEX KEY:** 0001923083

**ORGANIZATION NAME:**
- **EIN:** 881653281
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A

**BUSINESS ADDRESS:**
- **STREET 1:** 100 NORTHFIELD STREET
- **CITY:** GREENWICH
- **STATE:** CT
- **ZIP:** 06830
- **BUSINESS PHONE:** 203-622-9138

**MAIL ADDRESS:**
- **STREET 1:** 100 NORTHFIELD STREET
- **CITY:** GREENWICH
- **STATE:** CT
- **ZIP:** 06830

### Attached PDF Documents

**Attachment 1:** `ck0000000000-ex99_4.pdf`

_No text found in this document._

**Attachment 2:** `ck0000000000-ex99_5.pdf`

_No text found in this document._

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 3)**

**Sylvamo Corporation**

*(Name of Issuer)*

**Common Stock, par value $1.00 per share**

*(Title of Class of Securities)*

**871332102**

*(CUSIP Number)*

**Michael O'Donnell, Esq.**<br>Atlas FRM LLC<br>100 Northfield Street<br>Greenwich CT 06830<br>(203) 622-9138

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**11/05/2025**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **871332102** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**ACR Group Paper Holdings JR LP** | Name of reporting person<br>**ACR Group Paper Holdings JR LP** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**AF** | Source of funds (See Instructions)<br>**AF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**6312454.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**6312454.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**6312454.00** | Aggregate amount beneficially owned by each reporting person<br>**6312454.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**15.64%** | Percent of class represented by amount in Row (11)<br>**15.64%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**PN** | Type of Reporting Person (See Instructions)<br>**PN** | |

---

**Comment for Reporting Person:** Row 8, 10 and 11.  The reporting person expressly disclaims beneficial ownership with respect to any shares of Common Stock of the Issuer other than the Common Stock of the Issuer owned directly by such reporting person.

Row 13.  All percentages of Common Stock outstanding contained herein are based on 40,372,555 shares of Common Stock outstanding as of August 1, 2025, according to the Form 10-Q filed by the Issuer with the SEC on August 8, 2025.

| **CUSIP No.** | **871332102** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**ACR Group Paper Holdings JR GP LLC** | Name of reporting person<br>**ACR Group Paper Holdings JR GP LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**6312454.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**6312454.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**6312454.00** | Aggregate amount beneficially owned by each reporting person<br>**6312454.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**15.64%** | Percent of class represented by amount in Row (11)<br>**15.64%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** Row 8, 10 and 11.  The reporting person expressly disclaims beneficial ownership with respect to any shares of Common Stock of the Issuer other than the Common Stock of the Issuer owned directly by such reporting person.

Row 13.  All percentages of Common Stock outstanding contained herein are based on 40,372,555 shares of Common Stock outstanding as of August 1, 2025, according to the Form 10-Q filed by the Issuer with the SEC on August 8, 2025.

| **CUSIP No.** | **871332102** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**ACR Group Paper Holdings LP** | Name of reporting person<br>**ACR Group Paper Holdings LP** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**6312454.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**6312454.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**6312454.00** | Aggregate amount beneficially owned by each reporting person<br>**6312454.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**15.64%** | Percent of class represented by amount in Row (11)<br>**15.64%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**PN** | Type of Reporting Person (See Instructions)<br>**PN** | |

---

**Comment for Reporting Person:** Row 8, 10 and 11.  The reporting person expressly disclaims beneficial ownership with respect to any shares of Common Stock of the Issuer other than the Common Stock of the Issuer owned directly by such reporting person.

Row 13.  All percentages of Common Stock outstanding contained herein are based on 40,372,555 shares of Common Stock outstanding as of August 1, 2025, according to the Form 10-Q filed by the Issuer with the SEC on August 8, 2025.

| **CUSIP No.** | **871332102** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Atlas Capital GP IV LP** | Name of reporting person<br>**Atlas Capital GP IV LP** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**6312454.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**6312454.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**6312454.00** | Aggregate amount beneficially owned by each reporting person<br>**6312454.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**15.64%** | Percent of class represented by amount in Row (11)<br>**15.64%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**PN** | Type of Reporting Person (See Instructions)<br>**PN** | |

---

**Comment for Reporting Person:** Row 8, 10 and 11.  The reporting person expressly disclaims beneficial ownership with respect to any shares of Common Stock of the Issuer other than the Common Stock of the Issuer owned directly by such reporting person.

Row 13.  All percentages of Common Stock outstanding contained herein are based on 40,372,555 shares of Common Stock outstanding as of August 1, 2025, according to the Form 10-Q filed by the Issuer with the SEC on August 8, 2025.

| **CUSIP No.** | **871332102** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Atlas Capital Resources GP IV LLC** | Name of reporting person<br>**Atlas Capital Resources GP IV LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**6312454.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**6312454.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**6312454.00** | Aggregate amount beneficially owned by each reporting person<br>**6312454.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**15.64%** | Percent of class represented by amount in Row (11)<br>**15.64%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** Row 8, 10 and 11.  The reporting person expressly disclaims beneficial ownership with respect to any shares of Common Stock of the Issuer other than the Common Stock of the Issuer owned directly by such reporting person.

Row 13.  All percentages of Common Stock outstanding contained herein are based on 40,372,555 shares of Common Stock outstanding as of August 1, 2025, according to the Form 10-Q filed by the Issuer with the SEC on August 8, 2025.

| **CUSIP No.** | **871332102** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Atlas GP Global Holdings LLC** | Name of reporting person<br>**Atlas GP Global Holdings LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**6312454.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**6312454.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**6312454.00** | Aggregate amount beneficially owned by each reporting person<br>**6312454.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**15.64%** | Percent of class represented by amount in Row (11)<br>**15.64%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** Row 8, 10 and 11.  The reporting person expressly disclaims beneficial ownership with respect to any shares of Common Stock of the Issuer other than the Common Stock of the Issuer owned directly by such reporting person.

Row 13.  All percentages of Common Stock outstanding contained herein are based on 40,372,555 shares of Common Stock outstanding as of August 1, 2025, according to the Form 10-Q filed by the Issuer with the SEC on August 8, 2025.

| **CUSIP No.** | **871332102** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Andrew M. Bursky** | Name of reporting person<br>**Andrew M. Bursky** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**6312454.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**6312454.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**6312454.00** | Aggregate amount beneficially owned by each reporting person<br>**6312454.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**15.64%** | Percent of class represented by amount in Row (11)<br>**15.64%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** Row 8, 10 and 11.  The reporting person expressly disclaims beneficial ownership with respect to any shares of Common Stock of the Issuer other than the Common Stock of the Issuer owned directly by such reporting person.

Row 13.  All percentages of Common Stock outstanding contained herein are based on 40,372,555 shares of Common Stock outstanding as of August 1, 2025, according to the Form 10-Q filed by the Issuer with the SEC on August 8, 2025.

| **CUSIP No.** | **871332102** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Timothy J. Fazio** | Name of reporting person<br>**Timothy J. Fazio** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**6312454.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**6312454.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**6312454.00** | Aggregate amount beneficially owned by each reporting person<br>**6312454.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**15.64%** | Percent of class represented by amount in Row (11)<br>**15.64%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** Row 8, 10 and 11.  The reporting person expressly disclaims beneficial ownership with respect to any shares of Common Stock of the Issuer other than the Common Stock of the Issuer owned directly by such reporting person.

Row 13.  All percentages of Common Stock outstanding contained herein are based on 40,372,555 shares of Common Stock outstanding as of August 1, 2025, according to the Form 10-Q filed by the Issuer with the SEC on August 8, 2025.

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Common Stock, par value $1.00 per share

**(b) Name of Issuer:**
Sylvamo Corporation

**(c) Address of Issuer's Principal Executive Offices:**
6077 Primacy Parkway, Memphis, TN, 38119

This Amendment No. 3 ("Amendment No. 3") amends the Schedule 13D filed on April 25, 2022 (the "Original Schedule 13D" and, as amended, the "Schedule 13D"), as amended by Amendment No. 1 filed on February 15, 2023 ("Amendment No. 1") and Amendment No. 2 filed on June 23, 2023 ("Amendment No. 2"), and relates to common stock, par value $1.00 per share ("Common Stock"), of Sylvamo Corporation (the "Issuer"), having its principal executive offices at 6077 Primacy Parkway, Memphis, Tennessee 38119. The Schedule 13D remains in full force and effect, except as specifically amended by this Amendment No. 3. Capitalized terms used but not otherwise defined shall have the respective meanings ascribed to such terms in the Schedule 13D.

**Item 4. Purpose of Transaction**

Item 4 of the Schedule 13D is hereby amended and supplemented to include the following:

"On November 5, 2025, in order to terminate the "Cooperation Period" under the Cooperation Agreement by and among certain of the Reporting Persons and the Issuer, the Reporting Persons that are party to the Cooperation Agreement (i) delivered to Karl Meyers and Mark Wilde, each a director of the Issuer, a notice designating in writing that Mr. Meyers and Mr. Wilde resign from the board of directors of the Issuer (each such notice, a "Director Resignation Notice") and notified the Issuer in writing that such Director Resignation Notices were delivered and (ii) delivered notice to the Issuer in writing that the Atlas Group (as defined in the Cooperation Agreement) waives its rights under Section 1(c)(i) of the Cooperation Agreement to recommend a substitute person to replace either Mr. Meyers or Mr. Wilde as directors of the Issuer.  The foregoing description of the Cooperation Agreement does not purport to be complete and is qualified in its entirety by reference to the Cooperation Agreement, which is attached as Exhibit 99.2 to Amendment No. 1 and is incorporated herein by reference.

Although the Reporting Persons are considering plans or proposals with respect to their investment in the Issuer that could relate to or would result in any of the matters set forth in subparagraphs (a)-(j) of Item 4 of Schedule 13D, except to the extent described herein, the Reporting Persons have no present plans or proposals that relate to or would result in any such matters.

The Reporting Persons intend to review their investment in the Issuer on a continuing basis. Depending on various factors, including the Issuer's financial position and strategic direction, actions taken by the Board, price levels of the Common Stock of the Issuer, other investment opportunities available to the Reporting Persons, conditions in the securities market and general economic and industry conditions, the Reporting Persons may in the future take such actions with respect to their investment in the Issuer as they deem appropriate, including, without limitation, purchasing additional shares of Common Stock of the Issuer or other securities or derivative instruments related thereto or selling some or all of their shares of Common Stock of the Issuer or other securities or derivative instruments, engaging in hedging or similar transactions with respect to the Common Stock of the Issuer and, alone or with others, may engage in communications with directors and officers of the Issuer, other stockholders of the Issuer or other third parties or may take steps to implement a course of action, including, without limitation, engaging advisors, including, without limitation, legal, financial, regulatory, technical and/or industry advisors, to assist in any review. Such discussions and other actions may relate to various alternative courses of action, including, without limitation, those related to an extraordinary corporate transaction (including, but not limited to a merger, reorganization or liquidation) involving the Issuer or any of its subsidiaries; business combinations involving the Issuer or its subsidiaries; a sale or transfer of a material amount of assets of the Issuer or any of its subsidiaries; material asset purchases; the formation of joint ventures with the Issuer or its subsidiaries or the entry into other material projects; changes in the present business, operations, strategy, future plans or prospects of the Issuer, financial or governance matters; changes to the Board (including, without limitation, Board composition) or management of the Issuer; acting as a participant in debt financings of the Issuer or its subsidiaries; changes to the capitalization, ownership structure, dividend policy, business or corporate structure or governance documents of the Issuer; de-listing or de-registration of the Issuer's securities; the matters set forth in subparagraphs (a)-(j) of Item 4 of Schedule 13D or any action similar to those enumerated above."

**Item 5. Interest in Securities of the Issuer**

**(a)**
Items 5(a) and (b) of the Schedule 13D are hereby amended and restated as follows:

The information contained on the cover pages of this Schedule 13D is incorporated by reference. All percentages of Common Stock outstanding contained herein are based on 40,372,555 shares of Common Stock outstanding as of August 1, 2025, according to the Form 10-Q filed by the Issuer with the SEC on August 8, 2025.

In the aggregate, the Reporting Persons beneficially own, as of the date hereof, 6,312,454 shares of Common Stock, representing 15.64% of the outstanding shares.

(i)       ACR GPH JR has shared voting and dispositive power over 6,312,454 shares of Common Stock, representing 15.64% of the outstanding shares;
(ii)      ACR GPH JR GP, by virtue of its status as the general partner of ACR GPH JR, has shared voting and dispositive power over 6,312,454 shares of Common Stock, representing 15.64% of the outstanding shares;
(iii)     ACR GPH, by virtue of its status as the sole and controlling member of ACR GPH JR GP, has shared voting and dispositive power over 6,312,454 shares of Common Stock, representing 15.64% of the outstanding shares;
(iv)     AC GP IV, by virtue of its status as the general partner of ACR GPH and certain other funds, has shared voting and dispositive power over 6,312,454 shares of Common Stock, representing 15.64% of the outstanding shares;
(v)      ACR GP IV, by virtue of its status as the general partner of AC GP IV, has shared voting and dispositive power over 6,312,454 shares of Common Stock, representing 15.64% of the outstanding shares;
(vi)     AGP GH, by virtue of its status as the manager of ACR GP IV, has shared voting and dispositive power over 6,312,454 shares of Common Stock, representing 15.64% of the outstanding shares;
(vii)    each of Messrs. Bursky and Fazio, by virtue of his status as a manager and Managing Partner of AGP GH, has shared voting and dispositive power over 6,312,454 shares of Common Stock, representing 15.64% of the outstanding shares.

Each of the Reporting Persons expressly disclaims beneficial ownership with respect to any shares of Common Stock of the Issuer, other than the Common Stock of the Issuer owned of record by such Reporting Person.

**(b)**
—

**(c)**
—

**Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.**

Item 6 of the Schedule 13D is hereby amended and supplemented with the following:

"Margin Loan Facility

Pursuant to the Loan Agreement, as of the date hereof, ACR GPH JR has borrowed an aggregate of approximately $254.9 million."

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** ACR Group Paper Holdings JR LP

**Signature:** /s/ Timothy J. Fazio

**Name/Title:** By: ACR Group Paper Holdings JR GP LLC, its general partner, By: Timothy J. Fazio, President

**Date:** 11/06/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** ACR Group Paper Holdings JR GP LLC

**Signature:** /s/ Timothy J. Fazio

**Name/Title:** Timothy J. Fazio, President

**Date:** 11/06/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** ACR Group Paper Holdings LP

**Signature:** /s/ Timothy J. Fazio

**Name/Title:** Timothy J. Fazio, Managing Partner of Atlas GP Global Holdings LLC (1)

**Date:** 11/06/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Atlas Capital GP IV LP

**Signature:** /s/ Timothy J. Fazio

**Name/Title:** By: Atlas Capital Resources GP IV LLC, its general partner, By: Atlas GP Global Holdings LLC, its manager, By: Timothy J. Fazio, Managing Partner

**Date:** 11/06/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Atlas Capital Resources GP IV LLC

**Signature:** /s/ Timothy J. Fazio

**Name/Title:** By: Atlas GP Global Holdings LLC, its manager, By: Timothy J. Fazio, Managing Partner

**Date:** 11/06/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Atlas GP Global Holdings LLC

**Signature:** /s/ Timothy J. Fazio

**Name/Title:** Timothy J. Fazio, Managing Partner

**Date:** 11/06/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Andrew M. Bursky

**Signature:** /s/ Andrew M. Bursky

**Name/Title:** Andrew M. Bursky

**Date:** 11/06/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Timothy J. Fazio

**Signature:** /s/ Timothy J. Fazio

**Name/Title:** Timothy J. Fazio

**Date:** 11/06/2025