Mercer (MERC) Senior VP awarded 18,665 restricted stock units vesting in 2029

Rhea-AI Filing Summary

Ridder Wolfram reported acquisition or exercise transactions in this Form 4 filing.

Mercer International Inc. reported that Senior VP, Innovation & Gov. Wolfram Ridder received a grant of 18,665 restricted stock units (RSUs). Each RSU represents a contingent right to receive one share of Mercer common stock, or at the company’s election, the cash value.

The RSUs vest on January 1, 2029, subject to Ridder’s continued service with Mercer. Following this award, Ridder holds 18,665 RSUs, reflecting a compensation-related equity grant rather than an open-market purchase or sale.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Ridder Wolfram

Role Senior VP, Innovation & Gov.

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	18,665	$0.00	--

Holdings After Transaction: Restricted Stock Units — 18,665 shares (Direct, null)

Footnotes (1)

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. Not applicable.

Key Figures

RSUs granted: 18,665 units Grant price: $0.0000 per unit Underlying common shares: 18,665 shares +2 more

5 metrics

RSUs granted 18,665 units Grant of restricted stock units on June 4, 2026

Grant price $0.0000 per unit Compensation award, not an open-market purchase

Underlying common shares 18,665 shares Each RSU represents one share or equivalent cash value

RSUs after grant 18,665 units Total RSUs held following this award

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

Key Terms

Restricted Stock Units, contingent right, vest, common stock

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.

common stock financial

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

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

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Form 4 Insider Transactions: What Each Field Means →

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^*

Ridder Wolfram

(Last) (First) (Middle)

SUITE 1120, 700 WEST PENDER STREET

(Street)

VANCOUVER, BC BRITISH COLUMBIA V6C1G8

(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)
	Senior VP, Innovation & Gov.

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		18,665(1)		(1)	(2)	Common Stock	18,665	$0	18,665	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/Wolfram Riider	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)

FAQ

What did Mercer International (MERC) disclose about Wolfram Ridder in this Form 4?

Mercer International disclosed that Senior VP Wolfram Ridder received 18,665 restricted stock units as an equity-based compensation award. These RSUs give him a contingent right to Mercer common stock or equivalent cash value, subject to future vesting conditions.

How many restricted stock units were granted to the Mercer (MERC) executive?

The Mercer executive received 18,665 restricted stock units. This equity award increases his compensation-linked exposure to Mercer’s common stock, but does not involve any open-market buying or selling of shares at the time of the grant.

When do Wolfram Ridder’s RSUs at Mercer (MERC) vest?

The 18,665 restricted stock units vest on January 1, 2029. Vesting is conditional on Wolfram Ridder’s continued service with Mercer International through that date, aligning the award with long-term employment and company performance incentives.

Does Mercer (MERC) owe cash or stock for these new RSUs immediately?

Mercer does not deliver cash or stock immediately for this grant. Each RSU represents a contingent right to receive one share of common stock, or equivalent cash value, only when the vesting date is reached and conditions are satisfied.

Is this Mercer (MERC) Form 4 an open-market stock purchase or sale?

This Form 4 does not show an open-market purchase or sale. It records a compensation-related grant of 18,665 restricted stock units to a senior executive, with no transaction price and settlement deferred until the RSUs vest in the future.