STOCK TITAN

700K Mercer (MERC) shares bought by entities linked to Kellogg

Filing Impact
(Very High)
Filing Sentiment
(Positive)
Form Type
4

Rhea-AI Filing Summary

Mercer International’s ten percent owner Peter R. Kellogg, through entities including Harco, reported open-market purchases of 700,000 shares of common stock on May 15, 18 and 19, 2026 at prices around $0.95–$0.97 per share. Harco’s indirect holdings rose to 1,957,000 shares, and the filing also lists substantial additional direct and indirect holdings across various companies, trusts and a foundation associated with Kellogg.

Positive

  • None.

Negative

  • None.
Insider KELLOGG PETER R
Role null
Bought 700,000 shs ($672K)
Type Security Shares Price Value
Purchase Common Stock 105,000 $0.9747 $102K
Purchase Common Stock 380,000 $0.9645 $367K
Purchase Common Stock 215,000 $0.9469 $204K
holding Common Stock -- -- --
holding Common Stock -- -- --
holding Common Stock -- -- --
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holding Common Stock -- -- --
holding Common Stock -- -- --
holding Common Stock -- -- --
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holding Common Stock -- -- --
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Holdings After Transaction: Common Stock — 1,957,000 shares (Indirect, Via Harco); Common Stock — 965,929 shares (Direct, null)
Footnotes (1)
Total shares bought 700,000 shares Open-market purchases by Kellogg-related entities reported in Form 4
May 15 purchase 215,000 shares at $0.9469 Open-market purchase via Harco on May 15, 2026
May 18 purchase 380,000 shares at $0.9645 Open-market purchase via Harco on May 18, 2026
May 19 purchase 105,000 shares at $0.9747 Open-market purchase via Harco on May 19, 2026
Harco indirect holdings 1,957,000 shares Harco’s Mercer stake after May 19, 2026 purchase
Direct holdings 965,929 shares Shares held directly by Peter R. Kellogg as of May 15, 2026
open-market purchase financial
"transaction_action: "open-market purchase""
An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.
ten percent owner financial
"reporting person is marked as "is_ten_percent_owner": 1"
indirect ownership financial
"ownership_type: "indirect" and nature_of_ownership: "Via Harco""
transaction summary financial
""transactionSummary" shows buyShares of 700000 and net-buy direction"
common stock financial
"security_title is listed as "Common Stock" for all entries"
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.
SEC Form 4
FORM 4UNITED 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*
KELLOGG PETER R

(Last)(First)(Middle)
48 WALL STREET C/O IAT INSURANCE CO. LTD

(Street)
NEW YORK NEW YORK 10005

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
MERCER INTERNATIONAL INC. [ MERC ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
DirectorX10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/15/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock05/15/2026P215,000A$0.94691,472,000IVia Harco
Common Stock05/18/2026P380,000A$0.96451,852,000IVia Harco
Common Stock05/19/2026P105,000A$0.97471,957,000IVia Harco
Common Stock965,929D
Common Stock253,000IVia E.G. Anderson Inc.
Common Stock1,000,000IVia Peter and Cynthia Kellogg Foundation
Common Stock1,360,000IVia Non Marital PRK Trust
Common Stock2,300,000IVia Spouse
Common Stock2,000,000IVia Bermuda Partners
Common Stock10,000IVia Cardia Company Inc.
Common Stock13,475,000IVia IAT Insurance Co. Ltd.
Common Stock10,000IVia C. Kellogg & P Kellogg TTEE U/W Charles A Kirkland Trust
Common Stock35,000IVia the Myth and Barnegat Restoration Society, Inc.
Common Stock10,000IVia C. Kellogg & P Kellogg TTEE U/W Anne Kirkland Trust
Common Stock100,000IVia Acceptance Casualty
Common Stock225,000IVia Acceptance Indemnity
Common Stock630,000IVia Wilshire
Common Stock540,000IVia Transguard
Common Stock510,000IVia Occidental
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
/s/ Marguerite Gorman, attorney-in-fact05/20/2026
** Signature of Reporting PersonDate
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 insider transactions did MERC’s Peter R. Kellogg report on this Form 4?

The Form 4 shows entities associated with ten percent owner Peter R. Kellogg, including Harco, made open-market purchases totaling 700,000 Mercer International shares on May 15, 18 and 19, 2026 at prices just under one dollar per share.

What are Harco’s Mercer (MERC) holdings after these open-market purchases?

After the reported transactions, Harco’s indirect holdings of Mercer International common stock increased to 1,957,000 shares. These Harco-held shares are reported as indirectly owned by ten percent owner Peter R. Kellogg in the Form 4 filing.

Does Peter R. Kellogg hold Mercer (MERC) shares directly as well as indirectly?

Yes. The Form 4 lists 965,929 Mercer shares held directly by Peter R. Kellogg as of May 15, 2026, alongside numerous indirect positions through entities such as Harco, IAT Insurance Co. Ltd., Bermuda Partners, family trusts and a foundation.

Which entities associated with Peter R. Kellogg hold Mercer (MERC) shares?

Indirect Mercer holdings are reported via entities including Harco, IAT Insurance Co. Ltd., Bermuda Partners, Acceptance Indemnity, Acceptance Casualty, various family trusts, the Peter and Cynthia Kellogg Foundation, E.G. Anderson Inc., and Kellogg’s spouse.

What is the overall direction of the insider activity reported for MERC?

The transaction summary shows a net buying pattern, with three open-market purchase transactions totaling 700,000 shares and no reported sales. The filing also includes sixteen holding entries that update reported positions across multiple entities.