# EDGAR Filing Document

**Accession Number:** 0000897485
**File Stem:** 0001104659-25-066671
**Filing Date:** 2025-7
**Character Count:** 7662
**Document Hash:** f8596017b4a64749a2eb88a825fef871
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-25-066671.hdr.sgml**: 20250709

**ACCESSION NUMBER**: 0001104659-25-066671

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250606

**FILED AS OF DATE**: 20250709

**DATE AS OF CHANGE**: 20250709

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** KELLOGG PETER R
- **CENTRAL INDEX KEY:** 0000897485

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-51826
- **FILM NUMBER:** 251113403

**MAIL ADDRESS:**
- **STREET 1:** 48 WALL STREET
- **STREET 2:** C/O IAT REINSURANCE CO LTD
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10005
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MERCER INTERNATIONAL INC.
- **CENTRAL INDEX KEY:** 0001333274
- **STANDARD INDUSTRIAL CLASSIFICATION:** PULP MILLS [2611]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 470956945
- **STATE OF INCORPORATION:** WA
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 700 WEST PENDER STREET
- **STREET 2:** SUITE 1120
- **CITY:** VANCOUVER
- **STATE:** A1
- **ZIP:** V6C 1G8
- **BUSINESS PHONE:** 206-674-4639

**MAIL ADDRESS:**
- **STREET 1:** 14900 INTERURBAN AVENUE SOUTH
- **CITY:** SEATTLE
- **STATE:** WA
- **ZIP:** 98168

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MERCER INTERNATIONAL REGCO INC.
- **DATE OF NAME CHANGE:** 20050715

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

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>KELLOGG PETER R<br><sub>(Last) (First) (Middle)</sub><br>48 WALL STREET C/O IAT INSURANCE CO. LTD<br><sub>(Street)</sub><br>NEW YORK, NY 10005<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-06-06 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>MERCER INTERNATIONAL INC. [ MERC ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock | 2025-06-09 |  | P |  | 7003 | A | $3.725 | 807003 | I | Via Non Marital PRK Trust |
| Common Stock | 2025-06-09 |  | P |  | 19597 | A | $3.7492 | 826600 | I | Via Non Marital PRK Trust |
| Common Stock | 2025-06-10 |  | P |  | 12300 | A | $3.7178 | 838900 | I | Via Non Marital PRK Trust |
| Common Stock | 2025-06-10 |  | P |  | 12220 | A | $3.7184 | 851100 | I | Via Non Marital PRK Trust |
| Common Stock | 2025-06-10 |  | P |  | 8900 | A | $3.72 | 860000 | I | Via Non Marital PRK Trust |
| Common Stock | 2025-06-06 |  | P |  | 13600 | A | $3.6199 | 1931600 | I | Via Bermuda Partners |
| Common Stock | 2025-06-06 |  | P |  | 36600 | A | $3.6235 | 1968200 | I | Via Bermuda Partners |
| Common Stock | 2025-06-09 |  | P |  | 1171 | A | $3.67 | 1969371 | I | Via Bermuda Partners |
| Common Stock | 2025-06-09 |  | P |  | 30629 | A | $3.7499 | 2000000 | I | Via Bermuda Partners |
| Common Stock |  |  |  |  |  |  |  | 610000 | D |  |
| Common Stock |  |  |  |  |  |  |  | 1540000 | I | Via Spouse |
| Common Stock |  |  |  |  |  |  |  | 10000 | I | Via Cardia Company Inc. |
| Common Stock |  |  |  |  |  |  |  | 930000 | I | Via Peter and Cynthia Kellogg Foundation |
| Common Stock |  |  |  |  |  |  |  | 13475000 | I | Via IAT Insurance Co. Ltd. |
| Common Stock |  |  |  |  |  |  |  | 210000 | I | Via E.G. Anderson Inc. |
| Common Stock |  |  |  |  |  |  |  | 10000 | I | Via C. Kellogg & P Kellogg TTEE U/W Charles A Kirkland Trust |
| Common Stock |  |  |  |  |  |  |  | 35000 | I | Via the Myth and Barnegat Restoration Society, Inc. |
| Common Stock |  |  |  |  |  |  |  | 10000 | I | Via C. Kellogg & P Kellogg TTEE U/W Anne Kirkland Trust |
| Common Stock |  |  |  |  |  |  |  | 100000 | I | Via Acceptance Casualty |
| Common Stock |  |  |  |  |  |  |  | 225000 | I | Via Acceptance Indemnity |
| Common Stock |  |  |  |  |  |  |  | 1000000 | I | Via Harco |
| Common Stock |  |  |  |  |  |  |  | 630000 | I | Via Wilshire |
| Common Stock |  |  |  |  |  |  |  | 540000 | I | Via Transguard |
| Common Stock |  |  |  |  |  |  |  | 510000 | I | Via Occidental |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

---

**Signature:** /s/ Marguerite Gorman, attorney-in-fact  
**Date:** 2025-07-09

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**