Mercer International (MERC) insider reports series of stock share purchases

Rhea-AI Filing Summary

Mercer International Inc. disclosed insider activity by a director in a Form 4. The report lists a series of open-market purchases of common stock (transaction code P) between 10/03/2025 and 11/13/2025, with each trade showing the number of shares bought and the price per share.

Many of the shares are held indirectly through a non-marital PRK trust, an entity identified as Harco, and through the director’s spouse, with post-transaction holdings including 1,318,540 shares via the non-marital PRK trust, 1,520,000 shares via Harco, and 2,300,000 shares held indirectly via the spouse. The report also shows 646,000 shares of common stock held directly following one of the reported purchases.

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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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^*

KELLOGG PETER R

(Last) (First) (Middle)

48 WALL STREET C/O IAT INSURANCE CO. LTD

(Street)

NEW YORK NY 10005

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
MERCER INTERNATIONAL INC. [ MERC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
10/03/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	10/03/2025		P		3,700	A	$2.79	863,700	I	Via Non Marital PRK Trust
Common Stock	10/03/2025		P		3,122	A	$2.79	866,822	I	Via Non Marital PRK Trust
Common Stock	10/28/2025		P		7,700	A	$2.44	874,522	I	Via Non Marital PRK Trust
Common Stock	10/28/2025		P		41,778	A	$2.44	916,300	I	Via Non Marital PRK Trust
Common Stock	10/29/2025		P		17,000	A	$2.27	933,300	I	Via Non Marital PRK Trust
Common Stock	10/29/2025		P		17,000	A	$2.26	950,300	I	Via Non Marital PRK Trust
Common Stock	10/29/2025		P		19,000	A	$2.27	969,300	I	Via Non Marital PRK Trust
Common Stock	10/29/2025		P		5,540	A	$2.27	974,840	I	Via Non Marital PRK Trust
Common Stock	10/30/2025		P		18,650	A	$2.11	993,490	I	Via Non Marital PRK Trust
Common Stock	10/30/2025		P		350	A	$2.11	993,840	I	Via Non Marital PRK Trust
Common Stock	10/30/2025		P		6,160	A	$2.11	1,000,000	I	Via Non Marital PRK Trust
Common Stock	11/04/2025		P		36,602	A	$1.93	1,036,602	I	Via Non Marital PRK Trust
Common Stock	11/05/2025		P		36,000	A	$1.88	1,072,602	I	Via Non Marital PRK Trust
Common Stock	11/05/2025		P		36,000	A	$1.91	1,108,602	I	Via Non Marital PRK Trust
Common Stock	11/05/2025		P		25,938	A	$1.92	1,134,540	I	Via Non Marital PRK Trust
Common Stock	11/06/2025		P		36,000	A	$1.87	1,170,540	I	Via Non Marital PRK Trust
Common Stock	11/06/2025		P		285	A	$1.84	1,170,825	I	Via Non Marital PRK Trust
Common Stock	11/06/2025		P		35,715	A	$1.89	1,206,540	I	Via Non Marital PRK Trust
Common Stock	11/06/2025		P		58,000	A	$1.86	1,264,540	I	Via Non Marital PRK Trust
Common Stock	11/07/2025		P		6,099	A	$1.56	1,270,639	I	Via Non Marital PRK Trust
Common Stock	11/07/2025		P		1,200	A	$1.61	1,271,839	I	Via Non Marital PRK Trust
Common Stock	11/07/2025		P		28,701	A	$1.67	1,300,540	I	Via Non Marital PRK Trust
Common Stock	11/07/2025		P		18,000	A	$1.79	1,318,540	I	Via Non Marital PRK Trust
Common Stock	10/30/2025		P		36,000	A	$2.07	646,000	D
Common Stock	11/12/2025		P		70,000	A	$1.72	1,070,000	I	Via Harco
Common Stock	11/12/2025		P		25,000	A	$1.69	1,095,000	I	Via Harco
Common Stock	11/13/2025		P		100,000	A	$1.72	1,195,000	I	Via Harco
Common Stock	11/13/2025		P		125,000	A	$1.74	1,320,000	I	Via Harco
Common Stock	11/12/2025		P		200,000	A	$1.68	1,520,000	I	Via Harco
Common Stock								2,300,000	I	Via Spouse

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Marguerite Gorman, attorney-in-fact	12/09/2025
	** Signature of Reporting Person	Date
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.

FAQ

What insider transactions did Mercer International (MERC) report in this Form 4?

The Form 4 shows a director of Mercer International Inc. making multiple open-market purchases (code P) of the company’s common stock, with each line detailing the trade date, number of shares acquired, and price per share.

Over what period did the reported Mercer International (MERC) trades occur?

The reported non-derivative common stock purchases occurred between 10/03/2025 and 11/13/2025, as listed in the transaction table.

How are the Mercer International (MERC) shares held by the reporting person?

The Form 4 shows shares held both directly and indirectly, including indirect ownership via a non-marital PRK trust, an entity identified as Harco, and through the reporting person’s spouse.

What does transaction code "P" mean in the Mercer International (MERC) Form 4?

In this Form 4, code P in the transaction column indicates purchases of non-derivative securities, specifically open-market or privately negotiated common stock buys.

Does this Mercer International (MERC) Form 4 report any derivative security transactions?

The document includes a section for derivative securities (Table II), but in the provided content there are no completed entries showing derivative acquisitions or dispositions.

What levels of post-transaction ownership are shown for the Mercer International (MERC) director?

The non-derivative table shows post-transaction holdings of 1,318,540 shares via a non-marital PRK trust, 1,520,000 shares via Harco, 2,300,000 shares held indirectly via the spouse, and 646,000 shares held directly after one of the purchases.