Item 1.

(a) Mercer International Inc

(b)     Suite 1120, 700 West Pender St
	Vancouver, BC  V6C 1G8
	Canada 


Item 2.

(a) Platinum Investment Management Limited

(b) Level 8, 7 Macquarie Place
    Sydney NSW 2000
    Australia
(c) Australia
(d) Common Stock
(e) 588056101

Item 3.
(e) An IA in accordance with Section 240.13d-1(b)(1)(ii)(e)

Item 4.

(a) 0
(b) 0%
(c) (i) 0
(ii) 0
(iii) 0
(iv) 0

Item 5
Yes

Item 6
The clients of Platinum Investment Management Ltd including pooled 
investment vehicles and other managed accounts have the right to 
receive or power to direct the receipt of dividends from, and the 
proceeds from the sale of, Mercer International Inc.

Item 7
N/A

Item 8
N/A

Item 9
N/A



Item 10
(a) By signing below I certify that, to the best of my knowledge and 
belief, the securities referred to above were acquired and are held 
in the ordinary course of business and 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.
(b) N/A


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.