UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D/A

Under the Securities Exchange Act of 1934
(Amendment No. 6)*

Mercer International Inc.

(Name of Issuer)

Common Stock, par value $1.00

(Title of Class of Securities)

588056101

(CUSIP Number)

Peter R. Kellogg

48 Wall Street

30th Floor

New York, New York 10005

(212) 389-5841

(Name, Address and Telephone Number of Person
Authorized to Receive Notices and Communications)

February 18, 2016

(Date of Event Which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. ¨

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13d-7 for other parties to whom copies are to be sent.

^* The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

CUSIP No. 588056101
	1.	Names of Reporting Persons Peter R. Kellogg
	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)	¨
		(b)	¨
	3.	SEC Use Only
	4.	Source of Funds (See Instructions) OO
	5.	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e) ¨
	6.	Citizenship or Place of Organization United States

Number of Shares Beneficially Owned by Each Reporting Person With	7.	Sole Voting Power 18,952,332
	8.	Shared Voting Power
	9.	Sole Dispositive Power 18,952,332
	10.	Shared Dispositive Power

	11.	Aggregate Amount Beneficially Owned by Each Reporting Person 18,952,332
	12.	Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) ¨
	13.	Percent of Class Represented by Amount in Row (11) 29.3%
	14.	Type of Reporting Person (See Instructions) IN

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CUSIP No. 588056101
	1.	Names of Reporting Persons IAT Reinsurance Company Ltd.
	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)	¨
		(b)	¨
	3.	SEC Use Only
	4.	Source of Funds (See Instructions) WC
	5.	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e) ¨
	6.	Citizenship or Place of Organization Bermuda

Number of Shares Beneficially Owned by Each Reporting Person With	7.	Sole Voting Power 16,303,223
	8.	Shared Voting Power
	9.	Sole Dispositive Power 16,303,223
	10.	Shared Dispositive Power

	11.	Aggregate Amount Beneficially Owned by Each Reporting Person 16,303,223
	12.	Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) ¨
	13.	Percent of Class Represented by Amount in Row (11) 25.2%
	14.	Type of Reporting Person (See Instructions) CO

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Introduction

This Amendment No. 6 ("AMENDMENT NO. 6") to Schedule 13D is being filed pursuant to Rule13d-1(f) regarding shares of the common stock, par value $1.00 per share (the "SHARES"), of Mercer International Inc., a Washington corporation (the "COMPANY") that may be deemed to be beneficially owned by Peter R. Kellogg and/or IAT Reinsurance Company, Ltd., a Bermuda limited liability company (“IAT"). IAT and Peter R. Kellogg are each referred hereto as a Reporting Person, and are collectively referred to as the Reporting Persons.

This Amendment No. 6 amends and supplements the statement on Amendment No. 5 to Schedule 13D dated February 11, 2016 relating to the Shares. This Amendment No. 6 reflects transactions and developments through February 18, 2016, relating to such Reporting Persons' holdings of the Company. Only those items hereby reported in this Amendment No. 5 are amended and all other items remain unchanged. Terms used herein but not otherwise defined shall have the meanings set forth in the Schedule 13D, as amended.

Item 5. Interest in Securities of the Issuer

(a) As of the close of business on February 18, 2016, Mr. Kellogg beneficially owned an aggregate of 18,952,332 Shares, constituting approximately 29.3% of the Shares outstanding.

(b) IAT Reinsurance is the owner of 16,303,223 Shares, constituting approximately 25.2% of the Shares outstanding. Mr. Kellogg has sole dispositive and voting power with respect to the Shares owned by IAT. By virtue of his position with IAT, Mr. Kellogg may be considered to indirectly beneficially own such shares.

Transaction Date	Shares Purchased	Price Per Share
February 11, 2016	100,000	$6.47
February 17, 2016	100,000	$7.97
February 18, 2016	700,000	$8.00

(d) The non-voting stockholders of IAT have the right to participate in the receipt of dividends from, or proceeds from the sale of, the common shares held by them in accordance with their ownership interest in IAT.

(e) Not Applicable

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Signature

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

	February 18, 2016
	DATE

	IAT REINSURANCE COMPANY LTD.

	/s/ Marguerite R. Gorman, attorney in fact
	Peter R. Kellogg, President & CEO

	/s/ Marguerite R. Gorman, attorney in fact
	Peter R. Kellogg

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MERCER INTERNATIONAL INC SC 13D/A