Mercer CHRO granted 13,612 restricted stock units

ARGUIN GUY reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

ARGUIN GUY reported acquisition or exercise transactions in this Form 4 filing.

Mercer International Inc.'s Chief Human Resources Officer, Guy Arguin, received a grant of 13,612 restricted stock units. Each unit represents a contingent right to one share of Mercer common stock, or the cash value, at the company’s election.

The 13,612 restricted stock units vest on January 1, 2029, subject to Arguin’s continued service with Mercer. Following this grant, his reported derivative holdings consist of 13,612 restricted stock units tied to Mercer common stock.

Insider Trade Summary

Grant/Award: 13,612 shares

Grant/Award 1 txn

Insider ARGUIN GUY

Role Chief Human Resources Officer

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	13,612	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 13,612 contracts (Direct)

Footnotes (2)

1. F1. Each restricted stock unit represents a contingent right to receive one share of Mercer International Inc. ("Mercer") common stock, or, at the company's election, the cash value thereof. The restricted stock units vest on January 1, 2029 subject to the Reporting Person's continued service to Mercer.
2. F2. Not applicable.

Key Figures

RSUs granted: 13,612 units Grant price: $0.0000 per unit Underlying shares: 13,612 shares +2 more

5 metrics

RSUs granted 13,612 units Restricted stock unit grant to CHRO Guy Arguin

Grant price $0.0000 per unit Compensation-related RSU award

Underlying shares 13,612 shares Common stock underlying the RSUs

Post-grant RSU holdings 13,612 units Total derivative holdings after transaction

Vesting date January 1, 2029 RSUs vest subject to continued service

Key Terms

Restricted Stock Units, contingent right, vest, cash value

4 terms

Restricted Stock Units financial

"Each restricted stock unit represents a contingent right to receive one share of Mercer International Inc."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

contingent right financial

"Each restricted stock unit represents a contingent right to receive one share of Mercer International Inc. common stock, or the cash value thereof."

vest financial

"The restricted stock units vest on January 1, 2029 subject to the Reporting Person's continued service to Mercer."

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

cash value financial

"common stock, or, at the company's election, the cash value thereof."

Cash value is the amount of money you could get right away if an asset or contract were converted to cash or surrendered, after any fees or penalties. Think of it like the cash you could pull out of a savings jar when you need it; for investors it signals how much immediate liquidity or recoverable worth exists in an investment, insurance policy, or balance-sheet item.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Mercer (MERC) executive Guy Arguin report in this Form 4?

Guy Arguin reported receiving 13,612 restricted stock units as compensation. These units give him a contingent right to Mercer common stock or its cash value, subject to vesting and continued service conditions through January 1, 2029.

How many restricted stock units did Mercer (MERC) grant to Guy Arguin?

Mercer granted Guy Arguin 13,612 restricted stock units. Each unit corresponds to one share of Mercer common stock, or its cash value, and all are scheduled to vest on January 1, 2029 if he continues his service.

When do Guy Arguin’s Mercer (MERC) restricted stock units vest?

The 13,612 restricted stock units granted to Guy Arguin vest on January 1, 2029. Vesting is contingent on his continued service with Mercer International Inc., aligning the award with long-term retention and performance horizons.

What does each Mercer (MERC) restricted stock unit granted to Guy Arguin represent?

Each restricted stock unit represents a contingent right to receive one Mercer common share or its cash value. The company can choose stock or cash on settlement, and the units vest on January 1, 2029 if service requirements are met.

How many derivative securities does Guy Arguin hold after this Mercer (MERC) award?

After the award, Guy Arguin holds 13,612 restricted stock units as derivative securities. These units, tied to Mercer common stock, reflect his reported position following this compensation-related grant under the company’s equity program.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 06/05/2026 - 02:47 PM Learn about SEC filing dates

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

ARGUIN GUY

(Last) (First) (Middle)

SUITE 1120 - 700 WEST PENDER STREET

(Street)

VANCOUVER BRITISH COLUMBIA V6C 1G8

(City) (State) (Zip)

BRITISH COLUMBIA, CANADA

(Country)

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

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/04/2026

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

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

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

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

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
Restricted Stock Units	(1)	06/04/2026		A		13,612(1)		(1)	(2)	Common Stock	13,612	$0	13,612	D

Explanation of Responses:

1. Each restricted stock unit represents a contingent right to receive one share of Mercer International Inc. ("Mercer") common stock, or, at the company's election, the cash value thereof. The restricted stock units vest on January 1, 2029 subject to the Reporting Person's continued service to Mercer.

2. Not applicable.

	/s/Guy Arguin	06/05/2026
	** 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.
* Form 4: SEC 1474 (03-26)