FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * EINHORN DAVID   2. Issuer Name and Ticker or Trading Symbol MERCER INTERNATIONAL INC [MERCS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 140 EAST 45TH STREET, FLOOR 24 3. Date of Earliest Transaction (Month/Day/Year) 12/21/2006 (Street) NEW YORK, NY 10017 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) ___ Form filed by One Reporting Person _X_ Form filed by More than One Reporting Person (City) (State) (Zip) 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 Common Shares 12/21/2006   S   9,100 (1) D $ 12.025 184,400 I (2) See Note (1) Common Shares 12/21/2006   S   87,200 (1) D $ 12.025 653,300 I (3) See Note (1) Common Shares 12/21/2006   S   57,400 (1) D $ 12.025 867,130 I (4) See Note (1)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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 Underlying Securities (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 of Derivative Security: 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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
EINHORN DAVID 140 EAST 45TH STREET FLOOR 24 NEW YORK, NY 10017		X
GREENLIGHT CAPITAL LLC 140 EAST 45TH STREET FLOOR 24 NEW YORK, NY 10017		X
GREENLIGHT CAPITAL INC 140 EAST 45TH STREET FLOOR 24 NEW YORK, NY 10017		X

Signatures

Daniel Roitman, on behalf of David Einhorn		12/26/2006
**Signature of Reporting Person		Date
Daniel Roitman, Chief Operating Officer of Greenlight Capital, L.L.C.		12/26/2006
**Signature of Reporting Person		Date
Daniel Roitman, Chief Operating Officer of Greenlight Capital, Inc.		12/26/2006
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	The filing of this Form 4 shall not be construed as an admission that Greenlight Capital, L.L.C. ("Greenlight LLC"), Greenlight Capital, Inc. ("Greenlight Inc" and, together with Greenlight LLC, "Greenlight"), or David Einhorn, the senior managing member of Greenlight LLC and president of Greenlight Inc, are or were for the purposes of Section 16(a) of the Securities Exchange Act of 1934, as amended, or otherwise the beneficial owner of any of the shares of beneficial interest, par value $1.00 per share (the "Common Shares") of Mercer International, Inc. ("Mercer") owned by Greenlight Capital, L.P. ("Greenlight Fund"), Greenlight Capital Qualified, L.P. ("Greenlight Qualified"), or Greenlight Capital Offshore, Ltd. ("Greenlight Offshore" and, collectively, the "Greenlight Funds"). Pursuant to Rule 16a-1, Greenlight LLC, Greenlight Inc, and Mr. Einhorn all disclaim such beneficial ownership.
(2)	Greenlight LLC holds 184,400 Common Shares of Mercer, excluding Common Shares from conversion of the notes, indirectly through the accounts of Greenlight Fund, of which Greenlight LLC is general partner. Greenlight LLC receives an allocation of net profits from and owns a partnership interest in Greenlight Fund. Mr. Einhorn reports the shares held indirectly by Greenlight LLC because, as the senior managing member of Greenlight LLC at the time of sale, Mr. Einhorn controlled the disposition and voting of the securities.
(3)	Greenlight Inc. holds 867,130 Common Shares of Mercer, excluding Common Shares from conversion of the notes, indirectly through the account of Greenlight Offshore, which is controlled by Greenlight Inc. Greenlight Inc. is the investment advisor of Greenlight Offshore and receives an asset-based fee and an annual fee based on the appreciation of Greenlight Offshore. Greenlight Offshore's total investment in Mercer accounts for less than 10% of its portfolio. Mr. Einhorn, as president and director of Greenlight Inc., has control over the voting and disposition of the securities of Greenlight Offshore. Additionally, Mr. Einhorn owns shares in Greenlight Offshore.
(4)	Greenlight LLC holds 653,300 Common Shares of Mercer, excluding Common Shares from conversion of the notes, indirectly through the accounts of Greenlight Qualified, of which Greenlight LLC is general partner. Greenlight LLC receives an allocation of net profits from and owns a partnership interest in Greenlight Qualified. Mr. Einhorn reports the shares held indirectly by Greenlight LLC because, as the senior managing member of Greenlight LLC at the time of sale, Mr. Einhorn controlled the disposition and voting of the securities.

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