UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. ___)* Mercer International Inc. (Name of Issuer) Common Shares of Beneficial Interest, $0.01 par value (Title of Class of Securities) 588056101 (CUSIP Number) December 31, 2005 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: |_| Rule 13d-1(b) |X| Rule 13d-1(c) |_| Rule 13d-1(d) *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 the disclosures provided in a prior cover page. The information required in 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 13G -------------------------------------------------------------------------------- 1. NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Peter R. Kellogg -------------------------------------------------------------------------------- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_] (b) [_] -------------------------------------------------------------------------------- 3. SEC USE ONLY -------------------------------------------------------------------------------- 4. CITIZENSHIP OR PLACE OF ORGANIZATION United States -------------------------------------------------------------------------------- 5. SOLE VOTING POWER 6,038,232 ----------------------------------------------------------------- NUMBER OF 6. SHARED VOTING POWER SHARES BENEFICIALLY NONE OWNED BY ----------------------------------------------------------------- EACH 7. SOLE DISPOSITIVE POWER REPORTING PERSON 6,038,232 WITH ----------------------------------------------------------------- 8. SHARED DISPOSITIVE POWER NONE -------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 6,038,232 -------------------------------------------------------------------------------- 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [_] -------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 17.3% -------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON* IN, HC -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 588056101 13G -------------------------------------------------------------------------------- 1. NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) IAT Reinsurance Company Ltd. -------------------------------------------------------------------------------- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_] (b) [_] -------------------------------------------------------------------------------- 3. SEC USE ONLY -------------------------------------------------------------------------------- 4. CITIZENSHIP OR PLACE OF ORGANIZATION Bermuda -------------------------------------------------------------------------------- 5. SOLE VOTING POWER 5,901,332 ----------------------------------------------------------------- NUMBER OF 6. SHARED VOTING POWER SHARES BENEFICIALLY NONE OWNED BY ----------------------------------------------------------------- EACH 7. SOLE DISPOSITIVE POWER REPORTING PERSON 5,901,332 WITH ----------------------------------------------------------------- 8. SHARED DISPOSITIVE POWER NONE -------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 5,901,332 -------------------------------------------------------------------------------- 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [_] -------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 17.0% -------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON* CO -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 588056101 ITEM 1(a). NAME OF ISSUER: Mercer International Inc. ("Mercer") ITEM 1(b). ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES: 14900 Interurban Avenue South Suite 282 Seattle, WA 98168 ITEM 2(a). NAME OF PERSON FILING: This statement is filed on behalf of Peter R. Kellogg and IAT Reinsurance Company Ltd. ("IAT"), a Bermuda corporation. Mr. Kellogg is the sole owner of IAT's voting stock, is a member of IAT's board of directors, and is the President and CEO of IAT. Mr. Kellogg and IAT previously reported their ownership of Mercer on a Schedule 13D filed on August 31, 2004. Pursuant to Rule 13d-1(h), Mr. Kellogg and IAT are no longer required to report their ownership on a Schedule 13D because they no longer beneficially own more than 20% of the outstanding shares of Mercer. A joint filing agreement of Mr. Kellogg and IAT is attached as Exhibit A to the previously filed 13D. This statement relates to 4,256,171 Shares of Mercer held by IAT and its wholly-owned subsidiaries, 136,900 Shares of Mercer held by two partnerships and a foundation which are controlled by Mr. Kellogg, and 1,645,161 issuable upon conversion of $12,750,000 of 8.5% convertible senior subordinated notes held by IAT and its subsidiaries. The convertible notes are convertible into Shares at any time prior to the maturity date of October 15, 2010 at a conversion price of $7.75 per share, subject to certain adjustments. Mr. Kellogg has sole dispositive and voting power with respect to the shares of Mercer owned by IAT and its subsidiaries. Mr. Kellogg disclaims beneficial ownership of the shares owned by the foundation and by IAT and its subsidiaries, and this statement should not be deemed to be an admission that Mr. Kellogg is a member of any "group" within the meaning of Section 13(d)(3) of the Securities Exchange Act of 1934, as amended, and the rules and regulations thereunder. ITEM 2(b). ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE: 120 Broadway, New York, NY 10271 ITEM 2(c). CITIZENSHIP: IAT is a Bermuda corporation, and Peter R. Kellogg is a citizen of the United States. CUSIP No. 588056101 ITEM 2(d). TITLE OF CLASS OF SECURITIES: Common Shares, $0.01 par value ITEM 2(e). CUSIP NUMBER: 588056101 ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO RULE 13d-1(b), OR 13d-2(b) OR 13d-2(c), CHECK WHETHER THE PERSON FILING IS A: N/A ITEM 4. OWNERSHIP (a) AMOUNT BENEFICIALLY OWNED: 6,038,232 shares (b) PERCENT OF CLASS: 17.3% (c) NUMBER OF SHARES AS TO WHICH SUCH PERSON HAS: (i) Sole power to vote or to direct the vote: 6,038,232 shares (ii) Shared power to vote or to direct the vote: NONE (iii) Sole power to dispose or to direct the disposition of: 6,038,232 shares (iv) Shared power to dispose or to direct the disposition of: NONE ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than 5 percent of the class of securities, check the following: |_| ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON The non-voting stockholders of IAT and the beneficiaries of the foundation have the right to participate in the receipt of dividends from, or proceeds from the sale of, the shares held by them in accordance with their respective ownership interests in IAT and the foundation. ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY See Exhibit B. CUSIP No. 588056101 ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP Not Applicable ITEM 9. NOTICE OF DISSOLUTION OF GROUP Not Applicable ITEM 10. CERTIFICATION By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. CUSIP No. 588056101 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. IAT REINSURANCE COMPANY LTD. Dated: February 14, 2006 York, New York By: /s/ Marguerite R. Gorman, attorney in fact ------------------------------------------ Name: Peter R. Kellogg Title: Chairman of the Board Dated: February 14, 2006 New York, New York /s/ Marguerite R. Gorman, attorney in fact ------------------------------------------ Peter R. Kellogg CUSIP No. 588056101 Exhibit A POWER OF ATTORNEY KNOW ALL BY THESE PRESENTS, that the undersigned hereby constitutes and appoints Marguerite R. Gorman as the undersigned's true and lawful attorney-in-fact to: (1) Execute for and on behalf of the undersigned, in the undersigned's individual capacity and in the undersigned's capacity as an officer and/or director of IAT Reinsurance Co. Ltd., a Bermuda corporation ("IAT"), all Forms 3, 4, and 5 in accordance with Section 16(a) of the Securities Exchange Act of 1934, and all Schedules 13D and 13G in accordance with Section 13 of the Securities Exchange Act of 1934, and the rules thereunder, and any other forms or reports the undersigned may be required to file in connection with the undersigned's or IAT's ownership, acquisition, or disposition of any equity securities which are registered under Section 12 of the Securities Exchange Act of 1934; (2) do and perform any and all acts for and on behalf of the undersigned or IAT which may be necessary or desirable to complete and execute any such Form 3, 4, or 5, or any such Schedule 13D or 13G, or other form, schedule or report, and timely file such form, schedule or report with the United States Securities and Exchange Commission and any stock exchange or similar authority; and (3) take any other action of any type whatsoever in connection with the foregoing which, in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by, the undersigned or IAT, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned or IAT pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact's discretion. The undersigned hereby grants to the attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be done by virtue of this power of attorney and the rights and powers herein granted. The undersigned acknowledges that the forgoing attorney-in-fact, in serving in such capacity at the request of the undersigned, is not assuming any of the undersigned's responsibilities to comply with Section 13 or Section 16 of the Securities Exchange Act of 1934. This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file Forms 3, 4, and 5 and/or Schedules 13D or 13G with respect to the undersigned's and/or IAT's holdings of and transactions in equity securities registered under Section 12 of the Securities Exchange Act of 1934, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact. IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this 1st day of August, 2005. /s/ Peter R. Kellogg ------------------------- Peter R. Kellogg Exhibit B ITEM 7 IAT is the relevant subsidiary for which Peter R. Kellogg may be considered a control person.